Abstract:
The present invention relates to a mechanical draft cooling tower that employs air cooled condenser modules. The aforementioned cooling tower operates by mechanical draft and achieves the exchange of heat between two fluids such as atmospheric air, ordinarily, and another fluid which is usually steam. The aforementioned cooling tower utilizes a modular air cooled condenser concept wherein the air cooled condensers utilize heat exchange deltas that use tube bundles that are manufactured and assembled prior to being shipped to the tower site.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims priority to U.S. Provisional Application Ser. No. 61/828,076, filed on May 28, 2013, titled “MODULAR AIR COOLED CONDENSER APPARATUS AND METHOD,” the disclosure of which is incorporated herein by reference in its entirety. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to a mechanical draft cooling tower that utilizes air cooled condenser modules. The aforementioned cooling tower operates by mechanical draft and achieves the exchange of heat between two fluids such as atmospheric air, ordinarily, and another fluid which is usually steam or some sort of industrial process fluid. The aforementioned cooling tower operates by mechanical draft which utilizes an air current generator such as a fan or the like. 
       BACKGROUND OF THE INVENTION 
       [0003]    Cooling towers are heat exchangers of a type widely used to emanate low grade heat to the atmosphere and are typically utilized in electricity generation, air conditioning installations and the like. In a mechanical draft cooling tower for the aforementioned applications, airflow is induced or forced via an air flow generator such as a driven impeller, driven fan or the like. Cooling towers may be wet or dry. Dry cooling towers can be either “direct dry,” in which steam is directly condensed by air passing over a heat exchange medium containing the steam or an “indirect dry” type cooling towers, in which the steam first passes through a surface condenser cooled by a fluid and this warmed fluid is sent to a cooling tower heat exchanger where the fluid remains isolated from the air, similar to an automobile radiator. Dry cooling has the advantage of no evaporative water losses. Both types of dry cooling towers dissipate heat by conduction and convection and both types are presently in use. Wet cooling towers provide direct air contact to a fluid being cooled. Wet cooling towers benefit from the latent heat of vaporization which provides for very efficient heat transfer but at the expense of evaporating a small percentage of the circulating fluid. 
         [0004]    To accomplish the required direct dry cooling the condenser typically requires a large surface area to dissipate the thermal energy in the gas or steam and oftentimes may present several challenges to the design engineer. It sometimes can be difficult to efficiently and effectively direct the steam to all the inner surface areas of the condenser because of non-uniformity in the delivery of the steam due to system ducting pressure losses and velocity distribution. Therefore, uniform steam distribution is desirable in air cooled condensers and is critical for optimum performance. Another challenge or drawback is, while it is desirable to provide a large surface area, steam side pressure drop may be generated thus increasing turbine back pressure and consequently reducing efficiency of the power plant. Therefore it is desirous to have a condenser with a strategic layout of ducting and condenser surfaces that allows for an even distribution of steam throughout the condenser that reduces back pressure, while permitting a maximum of cooling airflow throughout and across the condenser surfaces. 
         [0005]    Another drawback to the current air cooled condenser towers is that they are typically very labor intensive in their assembly at the job site. The assembly of such towers oftentimes requires a dedicated labor force, investing a large amount of hours. Accordingly, such assembly is labor intensive requiring a large amount of time and therefore can be costly. Accordingly, it is desirable and more efficient to assemble as much of the tower structure at the manufacturing plant or facility, prior to shipping it to the installation site. 
         [0006]    It is well known in the art that improving cooling tower performance (i.e. the ability to extract an increased quantity of waste heat in a given surface) can lead to improved overall efficiency of a steam plant&#39;s conversion of heat to electric power and/or to increases in power output in particular conditions. Moreover, cost-effective methods of manufacture and assembly also improve the overall efficiency of cooling towers in terms of cost-effectiveness of manufacture and operation. Accordingly, it is desirable for cooling tower that are efficient in both in the heat exchange properties and assembly. The present invention addresses this desire. 
         [0007]    Therefore it would desirous to have an economical, mechanical draft, modular cooling tower that is efficient not only in its heat exchange properties but also in its time required for assembly and cost for doing the same. 
       SUMMARY OF THE INVENTION 
       [0008]    Embodiments of the present invention advantageously provides for a fluid, usually steam and method for a modular mechanical draft cooling tower for condensing said steam. 
         [0009]    An embodiment of the invention includes a method for assembling a modular air cooled condenser extending along a vertical axis away from horizontal, comprising the steps of: assembling a first condenser bundle assembly having a first set of tubes having first and second ends, a steam manifold connected to the first ends of the tubes, and a condensate header connected to the second ends of the tubes; assembling a second condenser bundle having a second set of tubes having first and second ends, a steam manifold connected to the first ends of the tubes, and a condensate header connected to the second ends of the tubes; placing the first and second condenser bundle assemblies in to a container; transporting the container to a location upon which the modular air cooled condenser will be assembled; assembling a heat exchange delta by placing the first condenser bundle and the second condenser bundle; and positioning the heat exchange delta on a modular tower frame. 
         [0010]    Another embodiment of the present invention includes a modular air cooled condenser extending along a vertical axis away from horizontal, comprising: means for assembling a first condenser bundle assembly having a first set of tubes having first and second ends, a steam manifold connected to the first ends of the tubes, and a condensate header connected to the second ends of the tubes; means for assembling a second condenser bundle assembly having a second set of tubes having first and second ends, a steam manifold connected to the first end of the tubes, and a condensate header connected to the second ends of the tubes; means for placing the first and second condenser bundle assemblies in to a container; means for transporting the container to a location upon which the modular air cooled condenser will be assembled; means for assembling a heat exchange delta by placing using the first condenser bundle and the second condenser bundle; and means for positioning the heat exchange delta on a modular tower frame. 
         [0011]    Another embodiment of the present invention, A mechanical draft modular air cooled condenser that cools an industrial fluid is disclosed, comprising: a plenum with which at least one delta resides wherein said at least one delta comprises first condenser bundle having a first set of tubes having first and second ends, a steam manifold connected to the first ends of the tubes, and a condensate header connected to the second ends of the tubes; and a second condenser bundle having a second set of tubes having first and second ends, a steam manifold connected to the first ends of the tubes, and a condensate header connected to the second ends of the tubes; a support frame that supports said plenum; and a shroud that houses an air current generator. 
         [0012]    In yet another embodiment of the present invention, a method for assembling a modular air cooled condenser extending along a vertical axis is disclosed, comprising: assembling a first condenser bundle having a first set of tubes having first and second ends and a condensate header connected to the second end of the tubes; assembling a second condenser bundle having a second set of tubes having first and second ends, and a condensate header connected to the second end of the tubes; placing the first and second condenser bundles in to a container; transporting the container to a location upon which the modular air cooled condenser will be assembled; assembling a heat exchange delta by placing using the first condenser bundle and the second condenser bundle; and positioning the heat exchange delta on a modular tower frame. 
         [0013]    There has thus been outlined, rather broadly, certain embodiments of the invention in order that the detailed description thereof herein may be better understood, and in order that the present contribution to the art may be better appreciated. There are, of course, additional embodiments of the invention that will be described below and which will form the subject matter of the claims appended hereto. 
         [0014]    In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of embodiments in addition to those described and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein, as well as the abstract, are for the purpose of description and should not be regarded as limiting. 
         [0015]    As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]    The above-mentioned and other features and advantages of this disclosure, and the manner of attaining them, will become more apparent and the disclosure itself will be better understood by reference to the following description of various embodiments of the disclosure taken in conjunction with the accompanying figures. 
           [0017]      FIG. 1  is a top view of a power plant with heat exchanger having an air cooled condenser module in accordance with an embodiment of the present invention. 
           [0018]      FIG. 2  is an elevation view of the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0019]      FIG. 3  is a sectional view of the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0020]      FIG. 4  is a perspective view of the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0021]      FIG. 5  is a perspective view of a braced bay for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0022]      FIG. 6  is a perspective view of a duct, risers, and middle truss for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0023]      FIG. 7  is a perspective view of an assembled duct, risers, and middle truss for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0024]      FIG. 8  is a perspective view of the assembled duct, risers, and middle truss disposed on the braced bay for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0025]      FIG. 9  is a perspective view of transversal structures on the assembled duct, risers, and middle truss disposed on the braced bay for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0026]      FIG. 10  is a perspective view of a transversal truss for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0027]      FIG. 11  is a perspective view of the transversal truss and transversal structures on the assembled duct, risers, and middle truss disposed on the braced bay for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0028]      FIG. 12  is a perspective view of a longitudinal truss for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0029]      FIG. 13  is a perspective view of the longitudinal truss, transversal truss, and transversal structures on the assembled duct, risers, and middle truss disposed on the braced bay for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0030]      FIG. 14  is a perspective view of a bridge for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0031]      FIG. 15  is a perspective view of the bridges, longitudinal trusses, transversal trusses, and transversal structures on the assembled duct, risers, and middle truss disposed on the braced bay for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0032]      FIG. 16  is a perspective view of a partial placement of headers and deltas for the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0033]      FIG. 17  is a perspective view of an air cooled condenser module in accordance with an embodiment of the present invention. 
           [0034]      FIG. 18  is a schematic side view of the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0035]      FIG. 19  is another schematic side view of the air cooled condenser module depicted in  FIG. 1  in accordance with an embodiment of the present invention. 
           [0036]      FIG. 20  is a perspective view of an A-type condenser configuration in accordance with an embodiment of the present invention. 
           [0037]      FIG. 21  illustrates the condenser bundles in a packaged arrangement for shipping in accordance with an embodiment of the present invention. 
           [0038]      FIG. 22  schematically illustrates the steps of assembly of an air cooled condenser in accordance with an embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0039]    In the following detailed description, reference is made to the accompanying drawings, which form a part hereof and show by way of illustration specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice them, and it is to be understood that other embodiments may be utilized, and that structural, logical, processing, and electrical changes may be made. It should be appreciated that any list of materials or arrangements of elements is for example purposes only and is by no means intended to be exhaustive. The progression of processing steps described is an example; however, the sequence of steps is not limited to that set forth herein and may be changed as is known in the art, with the exception of steps necessarily occurring in a certain order. 
         [0040]    Embodiments described herein provide a heat exchange system, a support structure for an air cooled condenser (“ACC”), and a method of constructing a support structure for an ACC. As described herein, some or all of these embodiments provide substantial benefit over standard A-frame ACC. Examples of benefits over standard A-frame ACC include reduced cost of about 25%, improved constructability, higher annual output of power plant, improved cleanability due to use of motorized cleaning shuttlestandard, lower visual impact due to reduced height (26 m vs. 32.6 m) and reduced occupied ground area, and reduced foundations (40 columns vs 48 for A-frame ACC with equivalent output). This height reduction is due to the reduced height of the multi-deltas described herein compared to conventional A-Frame-type bundles that have longer tubes and increased overall height. 
         [0041]    Specific examples of reduced cost and improved constructability include: Steam manifolds and steam condensate headers already welded on finned tube bundles in the manufacturing factory; Less total weight of steel structure (−25% vs A-Frame ACC); Less total weight of ducting (−25% vs A-Frame ACC); Reduced number of bundles (25% for A-Frame ACC); Fewer elements of steel structure to be assembled on site by bolting (−50% vs A-Frame ACC); Reduced site welding length on ducting (−50% vs A-frame ACC); Fewer lifting operations; Shorter construction duration; Fewer man activities at height due to more preassembly which results in improved overall safety level; Less scaffolding required; Higher proportion of piping and piping supports preassembled in the manufacturing factory on the finned tube bundles; Important proportion of assembly on site is at ground level (bolting of delta, liaison duct, . . . ); No cleaning ladder required; and More containerized deliveries. 
         [0042]    Specific examples of higher annual output of power plant include: Lower back-pressure during low ambient temperature periods (e.g., below 9° C.) which results in higher power plant output during low temperature periods; and lower minimum back-pressure (62 mbar vs 70 mbar for A-Frame ACC) which results in higher power plant electricity production on a yearly basis (+0.4% vs A-Frame ACC). More particularly, the back-pressure may be reduced because the heat exchange tubes in the bundles (described herein) may be made shorter and more numerous in comparison to an A-Frame ACC. In this manner, the total surface area may be equivalent while the velocity in the tubes is reduced. It is yet another advantage that the reduced velocity results in a corresponding reduction in erosion of the tubing. 
         [0043]      FIG. 1  is a top view of a heat exchange system  10  having an air cooled condenser module  12  in accordance with an embodiment of the present invention that is suitable for use with a heat generating facility such as a power plant  14 . As shown in  FIG. 1 , the heat exchange system  10  includes an understructure  20  to support the other elements of the heat exchange system  10  such as a supply line  22 , risers  24 , headers  26 , top manifold  28 , coils or bundles  30 , fan  32  and bell housing  34 . In addition, a return line  36  is configured to return condensate to the power plant  14 . 
         [0044]    In use, the power plant  14  generates heat to create steam to drive turbines to generate power in a manner generally known to those skilled in the art. After steam has passed through the turbines, the steam still retains substantial waste heat which is removed by the heat exchange system  10  and the condensate is returned via the return line  36 . 
         [0045]      FIG. 2  is an elevation view of the air cooled condenser module  12  depicted in  FIG. 1  in accordance with an embodiment of the present invention. As shown in  FIG. 2 , the understructure  20  occupies a relatively small area which results in great open space below the air cooled condenser module  12 . 
         [0046]      FIG. 3  is a sectional view of the air cooled condenser module  12  depicted in  FIG. 1  in accordance with an embodiment of the present invention. As shown in  FIG. 3 , the supply line  22  is depicted reducing in size as it proceeds along the air cooled condenser module  12 . In general, as the risers  24  channel steam from the supply line  22  to the top manifold  28  and bundles  30 , the size of the supply line  22  is reduced accordingly. 
         [0047]      FIG. 4  is a perspective view of the air cooled condenser module  12  depicted in  FIG. 1  in accordance with an embodiment of the present invention. As shown in  FIG. 4 , the headers  26 , top manifold  28  and bundles  30  as well as the fan  32  and bell housing have been removed for clarity to show the understructure  20 . In the following  FIGS. 5-16  an inventive sequence of construction for the air cooled condenser module  12  is illustrated in accordance to an embodiment. 
         [0048]    At  FIG. 5 , a braced bay  50  is disposed a construction site for the air cooled condenser module  12  depicted in  FIG. 1 . The braced bay  50  is configured to support one of the air cooled condenser modules  12  on four feet  52 . In typical construction, a foundation is disposed in the ground below each of the feet  52 . 
         [0049]      FIG. 6  is a perspective view of a duct  60 , the risers  24 , and a middle truss  62  for the air cooled condenser module  12  depicted in  FIG. 1  in accordance with an embodiment of the present invention. As shown in  FIG. 6 , the risers  24  and duct  60  may be pre-assembled at a manufacturing facility and container shipped to the building site. Similarly, the middle truss  62  may be pre-assembled at a manufacturing facility and container shipped to the building site. This and other pre-assembly described herein facilitates a reduction in labor costs and improvement in quality of construction. For example, at the production facility, welders may be protected from rain and other elements that may otherwise reduce weld quality. However, in other embodiments, the risers  24  may be affixed to the duct  60  after placement on the understructure  20 . 
         [0050]      FIG. 7  is a perspective view of an assembled duct  60 , risers  24 , and middle truss  62  for the air cooled condenser module  12  depicted in  FIG. 1  in accordance with an embodiment of the present invention. In an embodiment, the assembly may be performed on the ground at the building site or at the manufacturing facility. At  FIG. 8 , the assembled duct  60 , risers  24 , and middle truss  62  is shown disposed on the braced bay  50  for the air cooled condenser module  12  depicted in  FIG. 1 . For example, the assembled duct  60 , risers  24 , and middle truss  62  may be lifted by a crane and disposed on the braced bay  50 . 
         [0051]    At  FIG. 9 , a plurality of transversal structures  90  are disposed on the assembled duct  60 , risers  24 , and middle truss  62  disposed on the braced bay  50  for the air cooled condenser module  12  depicted in  FIG. 1 . For example, the transversal structures  90  may be welded or bolted to the braced bay  50  after being lifted by the crane. 
         [0052]      FIG. 10  is a perspective view of a transversal truss  100  for the air cooled condenser module  12  depicted in  FIG. 1  in accordance with an embodiment of the present invention. The transversal truss  100  may be pre-assembled at a manufacturing facility and container shipped to the building site. At  FIG. 11 , the transversal truss  100  is shown attached to the transversal structures  90  on the assembled duct  60 , risers  24 , and middle truss  62  disposed on the braced bay  50  for the air cooled condenser module  12  depicted in  FIG. 1 . For example, the transversal truss  100  may be welded or bolted to the transversal structures  90  after being lifted by the crane. 
         [0053]      FIG. 12  is a perspective view of a longitudinal truss  120  for the air cooled condenser module  12  depicted in  FIG. 1  in accordance with an embodiment of the present invention. The longitudinal truss  120  may be pre-assembled at a manufacturing facility and container shipped to the building site. At  FIG. 13 , the longitudinal truss  120  is shown attached to the transversal truss  100 . For example, the longitudinal truss  120  may be welded or bolted to the transversal truss  100  after being lifted by the crane. 
         [0054]      FIG. 14  is a perspective view of a bridge  140  for the air cooled condenser module  12  depicted in  FIG. 1  in accordance with an embodiment of the present invention. At  FIG. 15 , the bridges  140  are connected to the transversal trusses  100  on the braced bay  50 . For example, the bridges  140  may be welded or bolted to the transversal truss  100  after being lifted by the crane. 
         [0055]      FIG. 16  is a perspective view of a partial placement of the headers  26  disposed on the risers  24 . The headers  26  are shown connected to the top manifolds  28  which supply steam to the bundles  30 . A delta  160  is an assembled set of top manifolds  28  and bundles  30 . 
         [0056]    Turning now to  FIG. 17 , the modular air cooled condenser module  12  is illustrated on a simplified understructure. The air cooled condenser module  12  generally includes a plenum  170 , having an air current generator or fan disposed within a fan shroud or inlet bell  34  and the understructure  20  is shown in a simplified form for the sake of clarity. The air cooled condenser module  12  further includes multiple A-type geometry deltas, each designated  160 . Each delta  160  comprises two tube bundle assemblies  30  with a series of finned tubes to conduct heat transfer. The deltas  160  will be discussed in further detail below. 
         [0057]    Turning now to  FIGS. 18 and 19 , schematic side views of the air cooled condenser module  12  are depicted. As specifically illustrated in  FIG. 18 , the air cooled condenser employs risers  24  which are welded to the main steam duct  22 . The risers  24  are connected to a steam manifold  28  which operates to keep the steam flow velocity more constant. This above described configuration is part the A-type condenser bundles  30  that are shipped as a unit from the factory, which will be discussed in further detail below. The condenser bundles  30  are preferably welded to the risers  24  via a transition piece  26  to accommodate the geometry of the steam manifold. 
         [0058]    Turning now to  FIG. 20 , a delta  160  is illustrated. As depicted, each delta  160  is comprised of two individual heat exchange bundle assemblies  30 , each having a series of finned tubes. The individual tubes are approximately two (2) meters in length whereas the bundle length is approximately twelve (12) meters. As illustrated, each bundle assembly  30  is positioned at an angle to one another to form the A-type configuration of the delta  160 . While the bundle assemblies  30  may be positioned at any desired angle, they preferably are positioned at an angle approximately twenty degrees (20°) to approximately thirty degrees (30°) from vertical and approximately sixty degrees (60°) to approximately seventy degrees (70°) from horizontal. More specifically, the bundle assemblies  30  are positioned at twenty-six degrees) (26° from vertical and sixty-four degrees (64°) from horizontal. 
         [0059]    Each of the bundle assemblies  30  are assembled prior to shipping wherein each comprises a riser to header transition piece  202 , steam manifold  204 , finned tubes  206 , and steam condensate headers  200 . As can be seen in  FIG. 17 , due to the modular design and orientation of the bundle assemblies  30 , the air cooled condenser design  10  has approximately five (5) times more tubes as compared to typical designs. Moreover, the embodiments of the current invention not only utilize five (5) times the tubes, but employ condenser tubes that are much shorter in length. As result of the aforementioned design and orientation, the steam velocity traveling through the tube bundles  30  is reduced as result of the increased number of tubes in combination with the reduced tube length, and therefore steam pressure drop within the deltas  160  is reduced, making the air cool condenser  10  more efficient. 
         [0060]    Typically, turbine back pressure of an air cooled condenser or the like is limited by the maximum steam velocity in the tubes (to limit erosion) wherein the steam velocity is increasing with a decrease of back pressure (due to density of steam). Thus, due to the addition of tubes in accordance with the present invention, the steam is still maintained at the maximum allowable steam velocity but at a lower back pressure. The other limitation the current delta design addresses is that the pressure at the exit of the secondary bundles cannot be less than the vacuum group capability. This pressure typically results from turbine back pressure minus the pressure drop in ducting minus the pressure drop in the tubes. Accordingly, due to the reduced pressure drop in the tubes, the allowable turbine back pressure is lower with the delta  160  design. 
         [0061]    Furthermore, the above-described bundle design also reduces the pressure drop within the individual delta  160 . For example, the heat exchange that takes place via the deltas  160 , is dependent upon the heat exchange coefficient, i.e., the mean temperature difference between air and steam and the exchange surface. Due to the reduced pressure drop as previously described, the mean pressure (average between inlet pressure and exit pressure) in the exchanger is higher with the design of the current condenser configuration  12 . In other words, because steam is saturated, the mean steam temperature is also higher for the same heat exchange surface resulting in increased heat exchange. 
         [0062]    Turning now to  FIG. 21 , a transport container, generally designated  210  is illustrated. As the name suggests, the transport container  210  is used to transport the bundles  30 , from the factory to the job site. As illustrated, the condenser bundles  30 , are manufactured and assembled at the factory with the respective steam manifold  204  and steam condensate headers  200 . While five (5) bundles are illustrated positioned in the transport container, more or less individual bundles may be shipped per container depending as needed or required. 
         [0063]    Alternatively, the above described embodiments of the present employ tube bundles manufactured and assembled, prior to shipping, having steam manifold  204  and steam condensate headers  200 , alternative embodiment bundles may not include a manifold prior to shipping. More specifically, in such embodiments, the tube bundles may be ship without steam manifolds  28  attached thereto. In said embodiments, the tube bundles  30  may be assembled in field to form the A-type configuration, as discussed above. However, instead of employing two steam manifolds, this alternative embodiment may employ a single steam manifold wherein the single steam manifold extends along the “apex” of the A configuration. 
         [0064]    Referring now to  FIG. 22 , a flow chart is illustrated, schematically depicting the steps of assembly of the air cooled condenser tower  12 . As previously described, the individual tube bundles  30  are assembled prior to shipment to the job site, as referenced by numeral  212 . Each individual bundle assembly  30  includes a plurality of finned tubes  206  along with a steam manifold  204  and steam condensate header  200 . As previously discussed in connection with the previous figures of the specification, the bundle assemblies  30  are pre-manufactured at the factory prior to placing the individual bundle assemblies  30  in the shipping container  210  as identified by numeral  42 . The shipping containers  210  are then shipped to the erection field site. 
         [0065]    Next, the delta, generally indicated as  160 , is assembled in the field as identified by numerals  216  and  218 . As previously described, while the bundles may be positioned at any desired angle, they preferably are positioned at an angle (y) approximately twenty degrees (20°) to approximately thirty degrees (30°) from vertical and an angle (x) approximately sixty degrees) (60° to approximately seventy degrees (70°) from horizontal. More specifically, the bundles are positioned at twenty-six degrees (26°) from vertical and sixty-four degrees (64°) from horizontal. As designated by numeral  220 , a single A-type delta is illustrated  160  formed by two bundle assemblies  30  to form the “A” configuration. The bundle assemblies  30  self support one another in this configuration. 
         [0066]    Turning now to the air cooled condenser module  12  as referenced by the numeral  220 , it is depicted employing five deltas  160 . As discussed above, the air cooled condenser is an improvement over current air cooled condenser types and it has a high “pre-fabrication” level which equates to reduced installation cost and reduced installation time. Moreover, the above-described design reduces the pressure drop, thereby providing a more efficient heat exchange apparatus. 
         [0067]    Tables 1 and 2 below show the number of parts utilized for a 32 module Multi-Delta and a 30 module A-Frame ACC designed for the same duty. There is a very dramatic decrease in pieces which translates in to substantially less construction labor and construction time. 
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 
               
               
                   
               
               
                 Multidelta 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 Type 1 
                 Number 
                 2 
               
               
                   
                 Understrucure 
                 Columns 
                 12 
               
               
                   
                   
                 Bracing 
                 36 
               
               
                   
                   
                 Horizontal beams 
                 8 
               
               
                   
                   
                 Other 
                 26 
               
               
                   
                 Plenum 
                 Middle truss 
                 1 
               
               
                   
                   
                 Transversal truss 
                 4 
               
               
                   
                   
                 Longitudinal truss 
                 2 
               
               
                   
                   
                 Octogonal structure 
                 16 
               
               
                   
                   
                 Fan deck plate 
                 24 
               
               
                   
                   
                 Bridge 
                 4 
               
               
                   
                   
                 Horizontal wind bracing 
                 4 
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 2 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 0 
               
               
                   
                 transversal 
                   
                   
               
             
          
           
               
                   
                 Sum of elements 
                 278 
               
             
          
           
               
                   
                 Type 2 
                 Number 
                 2 
               
               
                   
                 Understrucure 
                 Columns 
                 12 
               
               
                   
                   
                 Bracing 
                 36 
               
               
                   
                   
                 Horizontal beams 
                 8 
               
               
                   
                   
                 Other 
                 26 
               
               
                   
                 Plenum 
                 Middle truss 
                 1 
               
               
                   
                   
                 Transversal truss 
                 4 
               
               
                   
                   
                 Longitudinal truss 
                 1 
               
               
                   
                   
                 Octogonal structure 
                 16 
               
               
                   
                   
                 Fan deck plate 
                 24 
               
               
                   
                   
                 Bridge 
                 4 
               
               
                   
                   
                 Horizontal wind bracing 
                 4 
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 0 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 0 
               
               
                   
                 transversal 
                   
                   
               
             
          
           
               
                   
                 Sum of elements 
                 272 
               
             
          
           
               
                   
                 Type 3 
                 Number 
                 2 
               
               
                   
                 Understrucure 
                 Columns 
                 6 
               
               
                   
                   
                 Bracing 
                 6 
               
               
                   
                   
                 Horizontal beams 
                 6 
               
               
                   
                   
                 Other 
                 13 
               
               
                   
                 Plenum 
                 Middle truss 
                 1 
               
               
                   
                   
                 Transversal truss 
                 2 
               
               
                   
                   
                 Longitudinal truss 
                 2 
               
               
                   
                   
                 Octogonal structure 
                 16 
               
               
                   
                   
                 Fan deck plate 
                 24 
               
               
                   
                   
                 Bridge 
                 4 
               
               
                   
                   
                 Horizontal wind bracing 
                 2 
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 2 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 0 
               
               
                   
                 transversal 
                   
                   
               
             
          
           
               
                   
                 Sum of elements 
                 168 
               
             
          
           
               
                   
                 Type 4 
                 Number 
                 2 
               
               
                   
                 Understrucure 
                 Columns 
                 6 
               
               
                   
                   
                 Bracing 
                 6 
               
               
                   
                   
                 Horizontal 
                 6 
               
               
                   
                   
                 beams 
                   
               
               
                   
                   
                 Other 
                 13 
               
               
                   
                 Plenum 
                 Middle truss 
                 1 
               
               
                   
                   
                 Transversal truss 
                 2 
               
               
                   
                   
                 Longitudinal 
                 0.5 
               
               
                   
                   
                 truss 
                   
               
               
                   
                   
                 Octogonal 
                 16 
               
               
                   
                   
                 structure 
                   
               
               
                   
                   
                 Fan deck plate 
                 24 
               
               
                   
                   
                 Bridge 
                 4 
               
               
                   
                   
                 Horizontal wind 
                 2 
               
               
                   
                   
                 bracing 
                   
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 0 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 0 
               
               
                   
                 transversal 
                   
                   
               
             
          
           
               
                   
                 Sum of elements 
                 161 
               
             
          
           
               
                   
                 Type 5 
                 Number 
                 4 
               
               
                   
                 Understrucure 
                 Columns 
                 6 
               
               
                   
                   
                 Bracing 
                 6 
               
               
                   
                   
                 Horizontal 
                 6 
               
               
                   
                   
                 beams 
                   
               
               
                   
                   
                 Other 
                 13 
               
               
                   
                 Plenum 
                 Middle truss 
                 1 
               
               
                   
                   
                 Transversal truss 
                 2 
               
               
                   
                   
                 Longitudinal 
                 2 
               
               
                   
                   
                 truss 
                   
               
               
                   
                   
                 Octogonal 
                 16 
               
               
                   
                   
                 structure 
                   
               
               
                   
                   
                 Fan deck plate 
                 24 
               
               
                   
                   
                 Bridge 
                 4 
               
               
                   
                   
                 Horizontal wind 
                 2 
               
               
                   
                   
                 bracing 
                   
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 2 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                 Wind wall 
                 sheeting support 
                 1.5 
               
               
                   
                 transversal 
                   
                   
               
             
          
           
               
                   
                 Sum of elements 
                 342 
               
             
          
           
               
                   
                 Type 6 
                 Number 
                 4 
               
               
                   
                 Understrucure 
                 Columns 
                 6 
               
               
                   
                   
                 Bracing 
                 6 
               
               
                   
                   
                 Horizontal 
                 6 
               
               
                   
                   
                 beams 
                   
               
               
                   
                   
                 Other 
                 13 
               
               
                   
                 Plenum 
                 Middle truss 
                 1 
               
               
                   
                   
                 Transversal truss 
                 2 
               
               
                   
                   
                 Longitudinal 
                 0.5 
               
               
                   
                   
                 truss 
                   
               
               
                   
                   
                 Octogonal 
                 16 
               
               
                   
                   
                 structure 
                   
               
               
                   
                   
                 Fan deck plate 
                 24 
               
               
                   
                   
                 Bridge 
                 4 
               
               
                   
                   
                 Horizontal wind 
                 2 
               
               
                   
                   
                 bracing 
                   
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 0 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                 Wind wall 
                 Horizontal girder 
                 1.5 
               
               
                   
                 transversal 
                   
                   
               
             
          
           
               
                   
                 Sum of elements 
                 328 
               
               
                   
               
               
                   
                 Bundle bottom 
                 256 
               
               
                   
                 girder 
                   
               
               
                   
                 External transversal walkways (with grating) 
                 320 
               
               
                   
                 Total assembly part for 32 modules multidelta 
                 2125 
               
               
                   
               
             
          
         
       
     
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
               
               
             
               
               
               
             
               
               
             
           
               
                 TABLE 2 
               
               
                   
               
               
                 ACC 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                   
                 Type 1 
                 Number 
                 1 
               
               
                   
                 Understrucure 
                 Columns 
                 8 
               
               
                   
                   
                 Bracing 
                 24 
               
               
                   
                   
                 Horizontal beams 
                 4 
               
               
                   
                   
                 Support longitudinal 
                 0 
               
               
                   
                   
                 wind wall 
                   
               
               
                   
                 Fan deck 
                 Main beams 
                 4 
               
               
                   
                   
                 Octogonal structure 
                 16 
               
               
                   
                 Bridge 
                 Main truss 
                 1 
               
               
                   
                   
                 Bridge foot 
                 4 
               
               
                   
                   
                 Handrails 
                 4 
               
               
                   
                   
                 Gratings 
                 10 
               
               
                   
                 A-frame 
                 Columns 
                 6 
               
               
                   
                   
                 Top A 
                 3 
               
               
                   
                   
                 Bracings 
                 8 
               
               
                   
                   
                 Top girder 
                 2 
               
               
                   
                   
                 Mini a-frame 
                 4 
               
               
                   
                   
                 Stick to middle of bridge 
                 4 
               
               
                   
                   
                 Hoist beam and support 
                 4 
               
               
                   
                   
                 Mid a-frame tranversal 
                 3 
               
               
                   
                   
                 Mid a-frame 
                 4 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 Stick to end of bridge 
                 4 
               
               
                   
                   
                 Internal girder and door 
                 16 
               
               
                   
                   
                 frame 
                   
               
               
                   
                   
                 Angle for middle valley 
                 4 
               
               
                   
                   
                 sheeting 
                   
               
               
                   
                 Wind wall 
                 Columns 
                 0 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                   
                 Horizontal girder 
                 0 
               
               
                   
                   
                 Bracings 
                 0 
               
               
                   
                   
                 Link to SDM 
                 0 
               
               
                   
                   
                 Tranversal walkway 
                 0 
               
               
                   
                   
                 Diamond plate 
                 0 
               
               
                   
                 Wind wall 
                 Columns 
                 0 
               
               
                   
                 transversal 
                   
                   
               
               
                   
                   
                 Girders 
                 0 
               
               
                   
                 Cleaning system 
                 Bottom rail 
                 4 
               
               
                   
                   
                 Top rail 
                 4 
               
               
                   
                   
                 Grating 
                 10 
               
             
          
           
               
                   
                 Sum of elements 
                 155 
               
             
          
           
               
                   
                 Type 2 
                 Number 
                 2 
               
               
                   
                 Understrucure 
                 Columns 
                 4 
               
               
                   
                   
                 Bracing 
                 10 
               
               
                   
                   
                 Horizontal beams 
                 3 
               
               
                   
                   
                 Support longitudinal 
                 0 
               
               
                   
                   
                 wind wall 
                   
               
               
                   
                 Fan deck 
                 Main beams 
                 3 
               
               
                   
                   
                 Octogonal structure 
                 16 
               
               
                   
                 Bridge 
                 Main truss 
                 1 
               
               
                   
                   
                 Bridge foot 
                 4 
               
               
                   
                   
                 Handrails 
                 4 
               
               
                   
                   
                 Gratings 
                 10 
               
               
                   
                 A-frame 
                 Columns 
                 4 
               
               
                   
                   
                 Top A 
                 2 
               
               
                   
                   
                 Bracings 
                 0 
               
               
                   
                   
                 Top girder 
                 2 
               
               
                   
                   
                 Mini a-frame 
                 2 
               
               
                   
                   
                 Stick to middle of bridge 
                 4 
               
               
                   
                   
                 Hoist beam and support 
                 4 
               
               
                   
                   
                 Mid a-frame tranversal 
                 2 
               
               
                   
                   
                 Mid a-frame 
                 4 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 Stick to end of bridge 
                 2 
               
               
                   
                   
                 Internal girder and door 
                 8 
               
               
                   
                   
                 frame 
                   
               
               
                   
                   
                 Angle for middle valley 
                 4 
               
               
                   
                   
                 sheeting 
                   
               
               
                   
                 Wind wall 
                 Columns 
                 0 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                   
                 Horizontal girder 
                 0 
               
               
                   
                   
                 Bracings 
                 0 
               
               
                   
                   
                 Link to SDM 
                 0 
               
               
                   
                   
                 Longitudinal walkway 
                 0 
               
               
                   
                   
                 Diamond plate 
                 0 
               
               
                   
                 Wind wall 
                 Columns 
                 0 
               
               
                   
                 transversal 
                   
                   
               
               
                   
                   
                 Girders 
                 0 
               
               
                   
                 Cleaning system 
                 Bottom rail 
                 4 
               
               
                   
                   
                 Top rail 
                 4 
               
               
                   
                   
                 Grating 
                 6 
               
             
          
           
               
                   
                 Sum of elements 
                 214 
               
             
          
           
               
                   
                 Type 3 
                 Number 
                 2 
               
               
                   
                 Understrucure 
                 Columns 
                 4 
               
               
                   
                   
                 Bracing 
                 10 
               
               
                   
                   
                 Horizontal beams 
                 3 
               
               
                   
                   
                 Support longitudinal 
                 0 
               
               
                   
                   
                 wind wall 
                   
               
               
                   
                 Fan deck 
                 Main beams 
                 3 
               
               
                   
                   
                 Octogonal structure 
                 16 
               
               
                   
                 Bridge 
                 Main truss 
                 1 
               
               
                   
                   
                 Bridge foot 
                 4 
               
               
                   
                   
                 Handrails 
                 4 
               
               
                   
                   
                 Gratings 
                 10 
               
               
                   
                 A-frame 
                 Columns 
                 4 
               
               
                   
                   
                 Top A 
                 2 
               
               
                   
                   
                 Bracings 
                 0 
               
               
                   
                   
                 Top girder 
                 2 
               
               
                   
                   
                 Mini a-frame 
                 2 
               
               
                   
                   
                 Stick to middle of bridge 
                 4 
               
               
                   
                   
                 Hoist beam and support 
                 4 
               
               
                   
                   
                 Mid a-frame tranversal 
                 2 
               
               
                   
                   
                 Mid a-frame 
                 4 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 Stick to end of bridge 
                 2 
               
               
                   
                   
                 Internal girder and door 
                 3 
               
               
                   
                   
                 frame 
                   
               
               
                   
                   
                 Angle for middle valley 
                 4 
               
               
                   
                   
                 sheeting 
                   
               
               
                   
                 Wind wall 
                 Columns 
                 0 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                   
                 Horizontal girder 
                 0 
               
               
                   
                   
                 Bracings 
                 0 
               
               
                   
                   
                 Link to SDM 
                 0 
               
               
                   
                   
                 Longitudinal walkway 
                 0 
               
               
                   
                   
                 Diamond plate 
                 0 
               
               
                   
                 Wind wall 
                 Columns 
                 4 
               
               
                   
                 transversal 
                   
                   
               
               
                   
                   
                 Girders 
                 20 
               
               
                   
                 Cleaning system 
                 Bottom rail 
                 4 
               
               
                   
                   
                 Top rail 
                 4 
               
               
                   
                   
                 Grating 
                 6 
               
             
          
           
               
                   
                 Sum of elements 
                 252 
               
             
          
           
               
                   
                 Type 4 
                 Number 
                 2 
               
               
                   
                 Understrucure 
                 Columns 
                 4 
               
               
                   
                   
                 Bracing 
                 10 
               
               
                   
                   
                 Horizontal 
                 3 
               
               
                   
                   
                 beams 
                   
               
               
                   
                   
                 Support 
                 4 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 wind wall 
                   
               
               
                   
                 Fan deck 
                 Main beams 
                 3 
               
               
                   
                   
                 Octogonal 
                 16 
               
               
                   
                   
                 structure 
                   
               
               
                   
                 Bridge 
                 Main truss 
                 1 
               
               
                   
                   
                 Bridge foot 
                 4 
               
               
                   
                   
                 Handrails 
                 4 
               
               
                   
                   
                 Gratings 
                 10 
               
               
                   
                 A-frame 
                 Columns 
                 6 
               
               
                   
                   
                 Top A 
                 3 
               
               
                   
                   
                 Bracings 
                 8 
               
               
                   
                   
                 Top girder 
                 2 
               
               
                   
                   
                 Mini a-frame 
                 4 
               
               
                   
                   
                 Stick to middle 
                 4 
               
               
                   
                   
                 of bridge 
                   
               
               
                   
                   
                 Hoist beam and 
                 4 
               
               
                   
                   
                 support 
                   
               
               
                   
                   
                 Mid a-frame 
                 3 
               
               
                   
                   
                 tranversal 
                   
               
               
                   
                   
                 Mid a-frame 
                 4 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 Stick to end of 
                 4 
               
               
                   
                   
                 bridge 
                   
               
               
                   
                   
                 Internal girder 
                 16 
               
               
                   
                   
                 and door frame 
                   
               
               
                   
                   
                 Angle for middle 
                 4 
               
               
                   
                   
                 valley sheeting 
                   
               
               
                   
                 Wind wall 
                 Columns 
                 7 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                   
                 Horizontal girder 
                 30 
               
               
                   
                   
                 Bracings 
                 6 
               
               
                   
                   
                 Link to SDM 
                 7 
               
               
                   
                   
                 Tranversal 
                 1 
               
               
                   
                   
                 walkway 
                   
               
               
                   
                   
                 Diamond plate 
                 10 
               
               
                   
                 Wind wall 
                 Columns 
                 0 
               
               
                   
                 transversal 
                   
                   
               
               
                   
                   
                 Girders 
                 0 
               
               
                   
                 Cleaning system 
                 Bottom rail 
                 4 
               
               
                   
                   
                 Top rail 
                 4 
               
               
                   
                   
                 Grating 
                 0 
               
             
          
           
               
                   
                 Sum of elements 
                 380 
               
             
          
           
               
                   
                 Type 5 
                 Number 
                 4 
               
               
                   
                 Understrucure 
                 Columns 
                 2 
               
               
                   
                   
                 Bracing 
                 4 
               
               
                   
                   
                 Horizontal 
                 2 
               
               
                   
                   
                 beams 
                   
               
               
                   
                   
                 Support 
                 2 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 wind wall 
                   
               
               
                   
                 Fan deck 
                 Main beams 
                 2 
               
               
                   
                   
                 Octogonal 
                 16 
               
               
                   
                   
                 structure 
                   
               
               
                   
                 Bridge 
                 Main truss 
                 1 
               
               
                   
                   
                 Bridge foot 
                 4 
               
               
                   
                   
                 Handrails 
                 4 
               
               
                   
                   
                 Gratings 
                 10 
               
               
                   
                 A-frame 
                 Columns 
                 4 
               
               
                   
                   
                 Top A 
                 2 
               
               
                   
                   
                 Bracings 
                 0 
               
               
                   
                   
                 Top girder 
                 2 
               
               
                   
                   
                 Mini a-frame 
                 2 
               
               
                   
                   
                 Stick to middle 
                 4 
               
               
                   
                   
                 of bridge 
                   
               
               
                   
                   
                 Hoist beam and 
                 4 
               
               
                   
                   
                 support 
                   
               
               
                   
                   
                 Mid a-frame 
                 2 
               
               
                   
                   
                 tranversal 
                   
               
               
                   
                   
                 Mid a-frame 
                 4 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 Stick to end of 
                 2 
               
               
                   
                   
                 bridge 
                   
               
               
                   
                   
                 Internal girder 
                 8 
               
               
                   
                   
                 and door frame 
                   
               
               
                   
                   
                 Angle for middle 
                 4 
               
               
                   
                   
                 valley sheeting 
                   
               
               
                   
                 Wind wall 
                 Columns 
                 6 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                   
                 Horizontal girder 
                 30 
               
               
                   
                   
                 Bracings 
                 6 
               
               
                   
                   
                 Link to SDM 
                 6 
               
               
                   
                   
                 Longitudinal 
                 1 
               
               
                   
                   
                 walkway 
                   
               
               
                   
                   
                 Diamond plate 
                 10 
               
               
                   
                 Wind wall 
                 Columns 
                 0 
               
               
                   
                 transversal 
                   
                   
               
               
                   
                   
                 Girders 
                 0 
               
               
                   
                 Cleaning system 
                 Bottom rail 
                 4 
               
               
                   
                   
                 Top rail 
                 4 
               
               
                   
                   
                 Grating 
                 0 
               
             
          
           
               
                   
                 Sum of elements 
                 608 
               
             
          
           
               
                   
                 Type 6 
                 Number 
                 4 
               
               
                   
                 Understrucure 
                 Columns 
                 2 
               
               
                   
                   
                 Bracing 
                 4 
               
               
                   
                   
                 Horizontal 
                 2 
               
               
                   
                   
                 beams 
                   
               
               
                   
                   
                 Support 
                 2 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 wind wall 
                   
               
               
                   
                 Fan deck 
                 Main beams 
                 2 
               
               
                   
                   
                 Octogonal 
                 16 
               
               
                   
                   
                 structure 
                   
               
               
                   
                 Bridge 
                 Main truss 
                 1 
               
               
                   
                   
                 Bridge foot 
                 4 
               
               
                   
                   
                 Handrails 
                 4 
               
               
                   
                   
                 Gratings 
                 10 
               
               
                   
                 A-frame 
                 Columns 
                 4 
               
               
                   
                   
                 Top A 
                 2 
               
               
                   
                   
                 Bracings 
                 0 
               
               
                   
                   
                 Top girder 
                 2 
               
               
                   
                   
                 Mini a-frame 
                 2 
               
               
                   
                   
                 Stick to middle 
                 4 
               
               
                   
                   
                 of bridge 
                   
               
               
                   
                   
                 Hoist beam and 
                 4 
               
               
                   
                   
                 support 
                   
               
               
                   
                   
                 Mid a-frame 
                 2 
               
               
                   
                   
                 tranversal 
                   
               
               
                   
                   
                 Mid a-frame 
                 4 
               
               
                   
                   
                 longitudinal 
                   
               
               
                   
                   
                 Stick to end of 
                 2 
               
               
                   
                   
                 bridge 
                   
               
               
                   
                   
                 Internal girder 
                 3 
               
               
                   
                   
                 and door frame 
                   
               
               
                   
                   
                 Angle for middle 
                 4 
               
               
                   
                   
                 valley sheeting 
                   
               
               
                   
                 Wind wall 
                 Columns 
                 6 
               
               
                   
                 longitudinal 
                   
                   
               
               
                   
                   
                 Horizontal girder 
                 30 
               
               
                   
                   
                 Bracings 
                 14 
               
               
                   
                   
                 Link to SDM 
                 5 
               
               
                   
                   
                 Longitudinal 
                 1 
               
               
                   
                   
                 walkway 
                   
               
               
                   
                   
                 Diamond plate 
                 10 
               
               
                   
                 Wind wall 
                 Columns 
                 3 
               
               
                   
                 transversal 
                   
                   
               
               
                   
                   
                 Girders 
                 17.5 
               
               
                   
                 Cleaning system 
                 Bottom rail 
                 4 
               
               
                   
                   
                 Top rail 
                 4 
               
               
                   
                   
                 Grating 
                 0 
               
             
          
           
               
                   
                 Sum of elements 
                 698 
               
               
                   
               
             
          
           
               
                 Top Platform 
                 21 
               
               
                 Cleaning ladder 
                 6 
               
               
                 External transversal walkways (with grating) 
                 240 
               
               
                 Total assembly part for 30 modules ACC (2 units of 15 modules) 
                 5148 
               
               
                   
               
             
          
         
       
     
         [0068]    As shown in Tables 1 and 2, the multidelta ACC of an embodiment disclosed herein includes less than half the parts of a comparable conventional A-Frame ACC (2125 parts verses 5148 parts). This reduction in part numbers has a corresponding reduction in labor costs, construction time, and the like. 
         [0069]    The many features and advantages of the invention are apparent from the detailed specification, and, thus, it is intended by the appended claims to cover all such features and advantages of the invention which fall within the true spirit and scope of the invention. Further, since numerous modifications and variations will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation illustrated and described, for example a forced draft air cooled condenser has been illustrated but an induced draft design can be adapted to gain the same benefits and, accordingly, all suitable modifications and equivalents may be resorted to that fall within the scope of the invention.