Abstract:
An improvement in atmospheric evaporative water condenser is disclosed. The apparatus includes tubes through which a refrigerant would pass and a variety of generally rectangular or circular fins are in contact with the tubes which causes the fins to cool. This permits water in its vapor form which exists in atmospheric air to condense on the fins and the condensate is collected as potable water. The improvement includes a plurality of different width spacers which are toleranced to be placed over the tubes and secured in desired positions. The fins are placed between the spacers allowing different fin spacing configurations on the apparatus. The different fin configurations optimize airflow for different coil and fin sections and help prevent water flooding or frost buildup on the fins which impair efficiency. Also, the spacers allow the fins to be placed far enough apart that non-frozen condensate does not block the air flow through the space between the fins.

Description:
RELATED PATENT APPLICATIONS  
       [0001]    This utility patent application claims priority from Provisional Patent Application Ser. No. 61/788,718 filed on Mar. 15, 2013 titled “Fin Spacing on an Evaporative Atmospheric Water Condenser”, Provisional Patent Application Ser. No. 61/789,372 filed on Mar. 15, 2013, titled “Refrigerant Flow Control For an Evaporative Atmospheric Water Condenser”, and Provisional Patent Application Ser. No. 61/831,231 filed on Jun. 5, 2013 titled “Refrigerant Flow Control For an Evaporative Atmospheric Water Condenser” all of which are incorporated herein in their entirety. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    Devices which extract water from the atmosphere employ a refrigerant which is pumped through a tortuous pipe with a plurality of fins affixed to the pipe. These fins will cool by action of the refrigerant and water would condense on the fin surface and be collected for use. The efficiency of such devices which remove water from the air is impaired when the water freezes on the fin surfaces. Additionally, the efficiency of such devices is also impaired when water which condensed on two adjacent fins blocks the air pathway between those two fins. Just as the water condensate could freeze or frost on a plurality of fin surfaces, so could non-frozen water condensate block the air pathway between a plurality of fin surfaces. 
         [0003]    It is desirable to maintain an appropriate temperature on the fin surface to permit the water to condense out of the air on to the fin surface without freezing or blocking the inter-fin area with unfrozen water condensate. 
       BRIEF DESCRIPTION OF THE INVENTION 
       [0004]    Currently, evaporators are fabricated with a specified fins per inch characteristic such as 6 fins per inch, 8 fins per inch or 12 fins per inch etc. The current invention is directed to fin spacing where a certain section of the evaporator has (for example) 6 fins per inch and another section 12 fins per inch. In order to have different fin spacing in different portions of the evaporator, spacers are introduced on the evaporator coils that allows changing fin spacing (fins per inch or fins per centimeter). This has the effect of altering the overall heat transfer coefficient of the system. Additionally, it permits a continuous air flow between the fins. 
         [0005]    The performance of any heat exchanger is a function of the coil design and the material and the geometry and spacing of fins. Fins are used to extend the surface available for heat transfer, and their aspect ratio, material, and attachment to coils affects their effectiveness. An important factor in the design of heat exchangers is the control of the temperature differential between the coil and the fin surface. The heat flow between the air and the fin surface is affected by the temperature at the coils and along the fins, as well as the pressure drop that is the function of the spacing between the fins. 
         [0006]    One of the factors that needs to be considered specifically for water generating evaporator coils is the determination of optimum distance between fins. The fin spacing is a well understood science for cooling evaporator coils where some water condensation is expected and the flow of the water droplets and even water films are well managed. 
         [0007]    Water generating coils however have to be optimized because drop wise condensation has a different heat transfer coefficient than film wise or falling film condensation. Too little water on the fins indicates that condensation has not yet been initiated. This can be caused by insufficient heat transfer, or insufficient heat transfer prior to air passing over a specific fin, or if the temperature of the fin surface is higher than the dew point temperature of the moist air. Too much water on the fin introduces an extra layer of heat resistance between the air and the fins and subsequently to the refrigerant. Water droplets on the fins may in some cases induce further condensation as moisture needs seed points of initiation for condensation, in the same way that rain is initiated. If the water film gets too thick and does not allow enough heat flow, the water layers nearest to the coils may freeze. Icing can introduce a greater resistance to heat flow and impede water generation. 
         [0008]    The main purpose of fabricating fins that are especially designed for water makers is to assure that water generated between the fins does not impede airflow and therefore the performance of the heat exchanger. Current state of the art for water generating evaporator fins is to vary the fin profile, or use undulating fins, or fins with holes cut out to allow water to pass through. While each of these designs offers some minor improvements, they also have disadvantages. For example the fins with holes are clearly inferior in overall heat transfer conduction. Undulating fins may in fact slow down the airflow or create turbulent areas for condensation, but unless optimized, they can also increase airflow resistance which is detrimental. 
         [0009]    Properly spaced fins that are optimized for each section of the evaporator are easy to analyze and thus optimize through simulations of computational fluid models. In the approach presented here, the use of fin spacers can also be applied to any fin design. 
         [0010]    To provide the ideal flow regimes and fin surface temperatures at different sections of an evaporator coil, a novel method of fin fabrication is utilized. Although evaporator fins on coils are currently fabricated utilizing different techniques, they share a common modality which would ensure that the fins are tightly attached to the coils so that contact resistance is minimized. 
         [0011]    Layers of fin material are consecutively lowered on a set of U-shaped coil columns. The fin layers have circular holes made through them conforming to the dimensions of the coil columns and include a dimple which is also defined as an integral-to-fin spacer around the perimeter of the holes. This dimple has a length and when the plurality of fins are placed over the coil columns, the fins abut each of the dimples which forms an identical space between adjacent fins throughout the apparatus. The thickness of the dimples are identical in each fin, thus the spacing is equal to the sum of the lengths of the 2 adjacent fin dimples, also defined as integral to fin spacers. That length is the distance or spacing between each adjacent fin element in some prior art devices. A spacer may be defined as a collar that is added between adjacent fins, or the integral-to-fin space (or dimple) that can be the result of a hole punch that forms the round holes or apertures through which the coils pass, or a combination of the non-integral collar and the integral-to-fin spacer. 
         [0012]    The invention comprises spacers of different widths which are placed over the coil columns. Different width spacers may be used on different columns in the apparatus. The amount of space between a fin on a single coil column caused by the spacers being intermediate two fins would modulate the heat transfer characteristics in different sections of the coil. To create the variation in spacing between fins, spacers can also be introduced between fin sheets that can vary from section to section of the apparatus. Additionally, different width spacers may be placed on different coil columns. The coil columns are parallel to each other as are the fins. Many fin variations are possible. For instance, in the same apparatus, some fins may still be spaced by the dimple, while others fins may be spaced by a spacer of a first width, and still other fins be spaced by a spacer having a third width. The use of spacers permits fins to be staggered and inter-spaced in the space between the parallel coil columns. Spacers may be used between some of the fins on a first coil while different sized spacers may be used on fins on a second coil, or even a third coil. A large number of fin configurations therefore may be employed, allowing a great variation in the number of different atmospheric water condenser devices. 
         [0013]    The invention will be better understood by the following drawing figures and their descriptions. The drawing figures shown herein are but a fraction of the possible combinations of fin configurations and spacers possible. The atmospheric water condenser devices with variants not shown are considered to be in the scope of the invention. Additionally, the instant invention will have application in devices which employ fins in such engineering applications such as heat transfer. Such applications are also considered within the scope of this application. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]      FIG. 1  is a view of a first embodiment of a three column coil evaporator of a water generating apparatus showing a first set of wider spacers placed on the rear refrigerant coil, and a second set of smaller width spacers placed on the center and front refrigerant coils, having two different configuration of fins placed on various refrigerant coils, and a first fin configuration which is adapted to be mounted on all three coils and a second fin configuration which is adapted to be mounted on the center refrigeration coil and the front refrigeration coil. 
           [0015]      FIG. 2  a view of a second embodiment of a three column coil evaporator of a water generating apparatus showing a first set of wider spacers placed on the rear refrigerant coil, and a second set of smaller width spacers placed on the front refrigerant coil, having two different configuration of fins placed on various refrigerant coils, and a first fin configuration which is adapted to be mounted on all three coils and a second fin configuration which is adapted to be mounted on the center refrigeration coil and the front refrigeration coil. 
           [0016]      FIG. 3  is a partial cutaway view of an embodiment of a three column coil evaporator of a water generating apparatus showing the tortuous path of the refrigerant pipes as they would pass through the different fin configurations, showing approximately twice as many fins on the front of the evaporator than the rear of the evaporator due to the different configuration of fins deployed adjacent different sized spacers used on the exterior of the refrigerant pipes intermediate the fins. The refrigerant pipes are not necessarily to size scale. 
           [0017]      FIG. 4  is a view of a third embodiment of a three column coil evaporator of a water generating apparatus showing a first set of wider spacers placed on the rear refrigerant coil, and a second set of smaller width spacers placed on the center refrigerant coil, and a third set of the same sized smaller width spacers on the front refrigerant coil, and a first fin configuration which is adapted to be mounted on all three refrigeration coils and a second fin configuration which is adapted to be mounted on the center refrigeration coil and the front refrigeration coil. 
           [0018]      FIG. 5  is a view of a fourth embodiment of a three column coil evaporator of a water generating apparatus showing a first set of wider spacers and a second set of double wide spacers placed on the rear refrigerant coil, and a second set of smaller width spacers placed on the center refrigerant coil, and a third set of smaller width spacers on the front refrigerant coil, and a first fin configuration which is adapted to be mounted on all three coils and a second fin configuration which is adapted to be mounted on the center refrigeration coil and the front refrigeration coil. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0019]    Referring to  FIG. 1 , a view of a first embodiment of a three column coil evaporator for a water generating apparatus  10  is shown. There are three serpentine refrigerant coils in which the refrigerant enters on the right and flows downward to three refrigerant exits (best seen in  FIG. 3 ). The rear refrigerant coil  50 , the center refrigerant coil  60  and the front refrigerant coil  70  are shown from the bottom of  FIG. 1 . Initially, as the refrigerant enters the rear refrigerant coil  50 , the center refrigerant coil  60  and the front refrigerant coil  70 , it is in its coldest condition. Finally, as the refrigerant exits the rear refrigerant coil  50 , the center refrigerant coil  60  and the front refrigerant coil  70 , it is in its warmest condition. Conventional methods are employed to cool the refrigerant in these closed loop refrigerant coils. 
         [0020]    Surrounding the rear refrigerant coil  50 , the center refrigerant coil  60  and the front refrigerant coil  70  is a plurality of fins, individually numbered fin elements  1  through  12 . Each one of these fins ( 1 - 12 ) is rectangular, and have apertures located along their entire length, to allow rear refrigerant coil  50 , the center refrigerant coil  60  and the front refrigerant coil  70 , each following their tortuous serpentine path to the refrigerant exit, to pass through each of the fins ( 1 - 12 ) many times as will be clearly seen in  FIG. 3 . 
         [0021]    Fins  1 - 12  are just a portion of the number of fins that would be employed in the apparatus  10 , and that will also be seen more clearly in  FIG. 3 . 
         [0022]    Rear refrigerant coil  50  has three spacers shown placed along its length, spacer  72 , spacer  74 , and spacer  76 . Spacer  72  is located at the furthest left position possible on the rear refrigerant coil  50 . These are called the first spacers or collars ( 72 , 74 ,  76 ). 
         [0023]    Front refrigerant coil  70  has three spacers shown placed along its length, spacer  78 , spacer  80  and spacer  82 . Spacer  78  is located at the furthest left position possible on the bottom refrigerant coil  70 . These are called the second spacers or collars ( 78 , 80 , 82 ). 
         [0024]    First spacers ( 72 , 74 , 76 ) are twice as wide as second spacers ( 78 , 80 , 82 ). Also, the number of spacers shown in the  FIG. 1  are just a portion of the number required for apparatus  10 . The fin spacer arrangement shown in  FIG. 1  would extend all the way along the horizontal portions of the refrigerant coils ( 50  and  60 ). The fin arrangement would extend all the way along the refrigerant This will be more clearly shown in  FIG. 3 . 
         [0025]    In  FIG. 1  there are shown two groups of fins. The first group of fins are fins  1 - 12 . The second group of fins are fins  13 - 24 . 
         [0026]    The first group of fins  1 - 12  are wide enough and have apertures along their entire length to allow them to be placed over all three refrigerant coils ( 50 , 60 , 70 ). 
         [0027]    The second group of fins are wide enough and have apertures along their entire length to allow them to be placed over only the center refrigerant coil  60  and the front refrigerant coil  70 . This includes fins  13 - 24 . 
         [0028]    The first group of fins extends the entire width of the horizontal portion of the three coils ( 50 , 60 , 70 ). The second group of fins extends the entire width of the horizontal portion of the central refrigerant coil  60  and the front refrigerant coil  70 . The second group of fins stops at a location intermediate the center refrigerant coil  60  and the rear refrigerant coil  50 . Fin groups 1 and 2 extend beyond rear refrigerant coil  50  and beyond front refrigerant coil  70 . 
         [0029]    With respect to the configuration of the first group of fins, fin  1  is immediately to right of spacer  72 . Fin  4  is immediately to the left of spacer  74 . Fin  5  is immediately to the right of spacer  74 . Fin  8  is immediately to the left of spacer  76 . Fin  9  is immediately to the right of spacer  76 . All of these spacers ( 72 ,  74 , and  76 ) are located on the rear refrigerant coil  50 . Additionally, fin  4  is immediately to the left of spacer  80 . Fin  8  is immediately to the left of spacer  82 . Spacers ( 80 , 82 ) are located on the front refrigerant coil  70 . 
         [0030]    The width of the first spacers ( 72 , 74 , 76 ) are the same. This width is specific and may vary for various situations. In the embodiment of  FIG. 1  the width of first spacers ( 72 , 74 , 76 ) is X inches. Additional spacers of this size will be placed according to the pattern shown in  FIG. 1  employing fins from the first group of fins for the horizontal length of rear refrigerant coil  50 . 
         [0031]    The width of the second spacers ( 78 , 80 , 90 ) are the same. This width is specific and may vary for various situations. In the embodiment of  FIG. 1 , the width of the second spacers ( 78 , 80 , 90 ) is ½ X inches. Additional spacers of this size will be placed according to the pattern shown in  FIG. 1  employing fins from the second group of fins for the horizontal length of front refrigerant coil  70 . 
         [0032]    Fin  1  abuts the right side of spacer  72 . Fin  4  and fin  5  abut spacer  74 . Fin  8  and fin  9  abut spacer  76 . Fin  2  and fin  3  are X inches apart, fin  2  is X inches from spacer  72  and fin  1 . Fin  3  is X inches from spacer  74  and fin  4 . Fin  6  and fin  7  are X inches apart, fin  6  is X inches from spacer  74  and fin  5 . Fin  7  is X inches from spacer  76 . Fin  10  is X inches from spacer  76  and fin  9 . Fin  11  is X inches from Fin  10 . Fin  11  is X inches from fin  10 . Immediately to the right of fin  12  would be another spacer identical to spacers ( 72 , 74 ,  76 ). Immediately to the right of the spacer located (but not shown) to the right of fin  12 , would be another fin of the configuration of group 1 fins. This pattern repeats itself along the horizontal length of the rear refrigerant coil  50 . 
         [0033]    In  FIG. 1 , center refrigerant coil  60  has no spacer elements located thereon. However, all of the fins,  1 - 24  have apertures designed to fit over center refrigerant coil  60 . This causes the fins which are from group 1 and group 2 to interdigitate in a fashion where there are twice the number of fins on the center refrigerant coil  60  and the front refrigerant coil  70  than there are on the rear refrigerant coil  50 . 
         [0034]    As noted, Fin groups 1 and 2 further extend downward below the bottom refrigerant coil  70 . And as also noted the bottom refrigerant coil  70  has three spacers placed along its length, spacer  78 , spacer  80  and spacer  82 . Spacer  78  is located at the furthest left position possible on the bottom refrigerant coil  70 . 
         [0035]    Going from right to left on the bottom refrigerant coil  70 , spacer  78  abuts fin  13 . To the right of fin  13  is fin  1 . To the right of fin  1  is fin  14 . To the right of fin  14  is fin  2 . To the right of fin  2  is fin  15 . To the right of fin  15  is fin  3 . To the right of fin  3  is fin  16 . To the right of fin  16  is fin  4 . Fin  4  abuts the left side of spacer  80 . Fin  17  abuts the right side of spacer  80 . To the right of fin  17  is fin  5 . To the right of fin  5  is fin  18 . To the right of fin  18  is fin  6 . To the right of fin  6  is fin  19 . To the right of fin  19  is fin  7 . To the right of fin  7  is fin  20 . To the right of fin  20  is fin  8 . Fin  8  abuts the left side of spacer  82 . Fin  21  abuts the right side of spacer  82 . To the right of fin  21  is fin  9 . To the right of fin  9  is fin  22 . To the right of fin  22  is fin  10 . To the right of fin  10  is fin  23 . To the right of fin  23  is fin  11 . To the right of fin  24  is fin  12 . Immediately to the right of fin  24  would be another spacer identical to spacers ( 78 ,  80 ,  82 ). Immediately to the right of the spacer located (but not shown) to the right of fin  24 , would be another fin of the configuration of group 2 fins. This pattern repeats itself along the horizontal length of the front refrigerant coil  70 . 
         [0036]    The rear refrigerant coil  50  has 12 fins equally spaced and parallel. The center refrigerant coil  60  and the front refrigerant coil  70  have 24 staggered or interdigitated fins. This configuration modulates the heat transfer characteristics in different sections of the coils. 
         [0037]    Referring to  FIG. 2 , a view of a second embodiment of a three column coil evaporator for a water generating apparatus  10 ′ is shown. In this embodiment the top refrigerant coil  50 ′, the center refrigerant coil  60 ′ and the bottom refrigerant coil  70 ′ are shown. In this embodiment the top refrigerant coil  50 ′ has twelve spacers  80 ′ placed along its length. Additionally, the bottom refrigerant coil  70 ′ has twenty-four spacers  82 ′ placed along its length. 
         [0038]    Except for the leftmost spacer  80 ′ on rear refrigerant coil  50 ′ each pair of spacers  80 ′ has a fin of the configuration of group 1 intermediately located. At the intersection of each spacer  80 ′ a fin element is located. Referring to the top refrigerant coil  50 ′, fins  1 ′- 12 ′ are intermediate each of the spacers  80 ′ and each fin selected from the fins of the configuration of group 1. The three refrigerant coils ( 50 ′,  60 ′,  70 ′) have fins  1 ′- 12 ′ mounted thereon, each spaced the width of one of the spacers  80 ′. 
         [0039]    Similarly to the embodiment shown in  FIG. 1 , fins  13 ′- 24 ′ are selected from the configuration of group 2 fins which only mount on the center refrigerant coil  60 ′ and the front refrigerant coil  70 ′. The front refrigerant coil  70 ′ has 24 spacers  82 ′ located almost side by side. Except for the leftmost spacer  82 ′ on rear refrigerant coil  50 ′ each pair of spacers  82 ′ has a fin of the configuration of group 2 intermediately located. 
         [0040]    Intermediate each of the  24  spacers  82  a fin is located. Referring to the front refrigerant coil  70 ′, fins  13 ′,  1 ′,  14 ′,  2 ′,  15 ′,  3 ′,  16 ′,  4 ′,  17 ′,  5 ′,  18 ′,  6 ′,  19 ′,  7 ′,  20 ′,  8 ′,  21 ′,  9 ′,  22 ′,  10 ′,  23 ′,  11 ′,  24 ′ and  12 ′ are intermediate each of the spacers  82 ′. 
         [0041]    The top refrigerant coil  50 ′ has 12 fins equally spaced and parallel. The center refrigerant coil  60 ′ and the bottom refrigerant coil  70 ′ have 24 staggered or interdigitated fins. This configuration modulates the heat transfer characteristics in different sections of the coils. 
         [0042]    Referring now to  FIGS. 3  a partial cutaway of the first embodiment of a three column coil evaporator of a water generating apparatus  100  showing the tortuous path of the refrigerant pipes  110  as they would pass through the different fin configurations  120  and  125 , showing approximately twice as many fins on the front  130  of the evaporator than the rear  140  of the evaporator due to the different configuration of fins deployed adjacent different sized spacers used on the exterior of the refrigerant pipes integrated with the fins. The refrigerant pipes are not necessarily to shown to scale. Since it is not possible to see the spacers ( 72 , 74 , 76 ) or ( 78 , 80 , 82 ) of the first embodiment shown in  FIG. 1  in  FIG. 3 , nor is it possible to see the spacers  80 ′ and  82 ′ of the second embodiment shown in  FIG. 2 ,  FIG. 3  may represent a view of both embodiments. Despite different spacer arrangements in the first two embodiments, the fin pattern and spacing created is the same. 
         [0043]    Three refrigerant entry pipes  150  are shown at the top  140  of the water extracting portion of the apparatus  100 . Three refrigerant exit pipes  160  are shown at the bottom  130  of the water extracting portion of the apparatus  100 . The refrigerant would be at its coldest temperature when entering the water extracting portion of apparatus  100  at entry pipes  150 , and would be at its warmest temperature when exiting the water extracting portion of apparatus  100  at exit pipes  160 . The rear refrigerant coil  50 , the center refrigerant coil  60  and the front refrigerant coil  70  are also shown. 
         [0044]    Referring now to  FIG. 4 , a view of a third embodiment of a three column coil evaporator of a water generating apparatus  200  is shown. A first set of wider spacers  215  are placed on the rear refrigerant coil  210 . A second set of smaller width spacers  222  are placed on the center refrigerant coil  220 . A third set of the same smaller width spacers  232  are placed on the front refrigerant coil  230 . The second set of smaller width spacers  222  are essentially the same width as the third set of smaller width spacers  232 . 
         [0045]    The rear refrigerant coil  210  shows twelve spacers  215 . The spacers  215  are of equal width. These spacers  215  are not limited to twelve and would extend the length of the horizontal portion of the rear refrigerant coil  215 . 
         [0046]    The center refrigerant coil  220  shows twenty-four smaller spacers  222 . The smaller spacers  222  are of equal width. These smaller spacers  222  are about ½ the width of the larger spacers  215 . 
         [0047]    The front refrigerant coil  230  includes twenty-four smaller spacers  232 . The smaller spacers  222  are of equal width and are of the same width as the smaller spacers  222 . 
         [0048]    The same two configurations of group 1 fins and group 2 fins are employed in the embodiment of  FIG. 4 . The first configuration of fins are fins adapted to be slidingly placed into their positions on refrigerant coil  210 , refrigerant coil  220  and refrigerant coil  230 . Only twelve fins  218  are shown however they will extend the length of the horizontal portions of the three refrigerant coils ( 210 ,  220 ,  230 ). This first configuration which has only twelve fins  218  in  FIG. 4  shows the twelve fins  218  extending beyond rear refrigerant coil  210  and beyond front refrigerant coil  230 . These twelve fins  218  which are shown in  FIG. 4  (and additional fins  218  not shown, but extending the length of the horizontal portions of the 3 refrigerant coils) are adapted to be slidingly mounted on all 3 refrigerant coils ( 210 ,  220 ,  230 ). The twelve fins  218  are parallel. The twelve fins  218  have spacers  215  on the rear refrigerant coil  210  between them. Additionally, the twelve fins  218  have spacers  222  on the center refrigerant coil  220  and spacers  232  on the front refrigerant coil  230  to the right and left of them. The twelve fins that have spacers  215  between them are equidistant from each other. 
         [0049]    The second configuration of fins are fins adapted to be slidingly placed into their positions on center refrigerant coil  220  and front refrigerant coil  230 . The front refrigerant coil  230  which has twelve fins  235 . The twelve fins  235  are adapted to permit the twelve fins  235  to slidingly mount on both the center refrigerant coil  220  and the front refrigerant coil  232 . The twelve fins  235  are parallel. The twelve fins  235  have spacers  222  and  232  between them. Thus the twelve fins that have spacers  222  and  232  are equidistant from each other. 
         [0050]    The three column coil evaporator of a water generating apparatus  200  shown in  FIG. 4  and the three column coil evaporator for a water generating apparatus  10 ′ shown in  FIG. 2  are similar. The difference is that  FIG. 4  shows a fin spacing arrangement which has fin spacers on all three refrigerant coils ( 210 ,  220 ,  230 ). It can easily be seen that many variations of spacers and fins can be adapted to be placed about a refrigerant coil to allow the modulation of the heat transfer characteristics in different sections of the coils. 
         [0051]    Referring now specifically to  FIG. 5  a view of a fourth embodiment of a three column coil evaporator of a water generating apparatus  400  with different fin spacing is shown. 
         [0052]    A first set of spacers  410  are placed on the rear refrigerant coil  420 . A second set of larger spacers  412  are also placed on the rear refrigerant coil  420 . The first set of spacers  410  is followed by the second set of larger spacers  412 , which in turn is followed by one of the first set of spacers  410  and so on. At the confluence of spacer  410  and spacer  412  is a rectangular fin selected from the configuration of group 1 fins which is adapted to slidingly positioned over the rear refrigerant coil  420 , the center refrigerant coil  430  and the front refrigerant coil  440 . A third set of smaller width spacers  432  are placed on the center refrigerant coil  430 . A fourth set of the same sized smaller width spacers  442  are placed on the bottom refrigerant coil  230 . 
         [0053]    The top refrigerant coil  420  includes  7  spacers  410 . The spacers  410  are of equal width. The rear refrigerant coil  420  also includes  6  spacers  412 . Spacers  412  are about twice as wide as spacers  410 . As in previous embodiments, this spacer arrangement would extend along the horizontal portion of the rear refrigeration coil  420 . 
         [0054]    The center refrigerant coil  430  includes  38  smaller spacers  432 . The smaller spacers  432  are of equal width. The smaller spacers  432  are about ½ the size of spacers  410 . As in previous embodiments, this spacer arrangement would extend along the horizontal portion of the center refrigeration coil  430 . 
         [0055]    The front refrigerant coil  440  includes  38  smaller spacers  442 . The smaller spacers  432  are of equal width and also are of the same width as the smaller spacers  442 . As in previous embodiments, this spacer arrangement would extend along the horizontal portion of the front refrigeration coil  440 . 
         [0056]    The rear refrigerant coil  420  which shows thirteen fins  414  that extend beyond the rear refrigerant coil  420  and extend beyond the front refrigerant coil  440 . These thirteen fins  414  are chosen form the configuration of group 1 fins and are adapted to be positioned on all three refrigeration coils ( 420 ,  430 ,  440 ). The 13 thirteen fins  414  are parallel. The thirteen fins  414  have spacers  400  and then spacers  412  between them on the rear refrigerant coil  420 . Additionally, the thirteen fins  414  have spacers  432  between them on the center refrigerant coil  430  and spacers  442  between them on the bottom refrigerant coil  440 . Due to the fact that the spacers  410  and  412  are of different widths the thirteen fins are not equidistant from each other. 
         [0057]    The front refrigerant coil  440  and the center refrigerant coil  430  shows twenty-five fins  445 . The 25 fins  445  have apertures which permit the twenty-five fins  445  to pass through both the center refrigerant coil  430  and the bottom refrigerant coil  440 . The twenty-five fins  445  are parallel. The twenty-five fins  445  have spacers  432  and  442  between them. 
         [0058]    The three column coil evaporator of a water generating apparatus  400  shown in  FIG. 5  and the three column coil evaporator for a water generating apparatus  200  shown in  FIG. 4  is that the top refrigerant coil  420  has two different sized spacers which alternate as shown in  FIG. 5 . These two sized spacers  410  and  412  respectively makes the fin spacing on the rear refrigerant coil  420  not equidistant. Additionally, a greater number of fins  414  and  445  are shown in  FIG. 5 . As in previous embodiments, this spacer arrangement would extend along the horizontal portion of the rear refrigeration coil  420 . The number of spacers and fins in all the embodiments, whether using group 1 configured fins or group 2 configured fins, and whether or not spacers are located on the center refrigerant coil, and despite the size of the spacers is not known. The length of the horizontal portion of the three of other number of serpentine refrigerant coils would determine the number of spacers and fins, and the length can be selected for many other patterns then those shown in this application. 
         [0059]      FIGS. 1 ,  2 ,  4 , and  5  gives an indication of the freedom possible in designing Evaporative Atmospheric Water Condenser by employing different sized spacers in different orientations. It can easily be seen that many variations of spacers and fins can be adapted to be placed about a refrigerant coil to allow the modulation of the heat transfer characteristics in different sections of the coils by using any of a variety of sized mechanical spacers intermediate fin structure. By use of these spacers, the water generating apparatus will be able to prevent frost, icing, or condensate buildup which could block the cold fin passageway that the warm moist air must pass. This allows for more water to be removed from the air and allows for higher efficiencies for the invention. 
         [0060]    The embodiments discussed herein generally are shown to have three coils. In any of the embodiments, more than 3 coils could be employed. That would increase the number of refrigerant entrances and exits. Such devices may be run in series. 
         [0061]    Such a fin spacer for an evaporative atmospheric water condenser may be usefully employed with a refrigerant flow control apparatus and method Provisional Patent Application 61/789,372 filed on Mar. 15, 2013, titled “Refrigerant Flow Control For an Evaporative Atmospheric Water Condenser” and Provisional Patent Application 61/831,231 filed on Jun. 15, 2013 titled “Refrigerant Flow Control For an Evaporative Atmospheric Water Condenser”. 
         [0062]    Alternate methods where the refrigerant is mixed as it passes through the atmospheric water condenser have been contemplated and one possible configuration is shown in  FIG. 1 . 
         [0063]    While the invention has been described in its preferred form or embodiment with some degree of particularity, it is understood that this description has been given only by way of example and that numerous changes in the details of construction, fabrication, and use, including the combination and arrangement of parts, may be made without departing from the spirit and scope of the invention.