Abstract:
The present technology provides a modular refrigeration and heat reclamation chiller system comprising an evaporator configured to vaporize a refrigerant to cool the refrigerant, a compressor coupled to the evaporator and configured to compress the refrigerant, a condenser coupled to the compressor and configured to condense the refrigerant compressed by the compressor, a sub-cooler coupled to the condenser and configured to receive the refrigerant from the condenser so as to selectively extract heat from the refrigerant and to transfer the refrigerant to the evaporator, and an expansion valve coupled to both the sub-cooler and the evaporator.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application claims priority to and the benefit of the filing date of U.S. Provisional Application No. 61/861,646 filed on Aug. 2, 2013, the entire disclosure of which is incorporated herein by reference. 
     
    
     FIELD 
       [0002]    This technology relates to a modular refrigeration and heat reclamation chiller. The modular refrigeration and heat reclamation chiller contains a chiller system comprising a compressor in circuit with multiple heat exchangers. The compressor operates at a lowered compression ratio. More specifically, the modular refrigeration and heat reclamation chiller can be stacked to form a modular shape. 
       BACKGROUND OF THE INVENTION 
       [0003]    A facility may be equipped with cooling and heating needs, such as an ice rink. The temperature of an ice rink is regulated to cool and maintain ice in the rink, but also, heating may be needed, for example to heat the inside of the building containing the ice rink or heat water for later usage. 
         [0004]    Generally, conventional technologies for chilling fluids fail to reclaim heat and therefore fail to use both the chilled and heated fluids in facilities&#39; operations. Moreover, chilling and/or heating devices may have any one of or a combination of the following undesirable characteristics: a large footprint; difficult to install, repair, and operate; and lack a compact size and/or shape. Thus, there is still a need for an alternative chiller system. 
       SUMMARY OF THE INVENTION 
       [0005]    This technology relates to a modular refrigeration and heat reclamation chiller. The modular refrigeration and heat reclamation chiller contains a chiller system comprising a compressor in circuit with multiple heat exchangers. 
         [0006]    In one aspect, the present technology provides a modular refrigeration and heat reclamation chiller system comprising an evaporator configured to vaporize a refrigerant to cool the refrigerant, a compressor coupled to the evaporator and configured to compress the refrigerant, a condenser coupled to the compressor and configured to condense the refrigerant compressed by the compressor, a sub-cooler coupled to the condenser and configured to receive the refrigerant from the condenser so as to selectively extract heat from the refrigerant and to transfer the refrigerant to the evaporator, and an expansion valve coupled to both the sub-cooler and the evaporator. 
         [0007]    In one embodiment, the condenser, the evaporator, and the expansion valve each have a refrigerant capacity, the refrigerant capacities of all of the condenser, the evaporator, and the expansion valve are greater than the refrigerant capacity of the compressor. 
         [0008]    In one embodiment, the refrigerant capacity of the condenser, evaporator, sub-cooler, and expansion valve produce a compression ratio of less than about 6:1 relative to the compressor. 
         [0009]    In one embodiment, the refrigerant capacity of the condenser, evaporator, sub-cooler, and expansion valve produce a compression ratio of less than about 4.5:1 relative to the compressor. 
         [0010]    In one embodiment, the refrigerant capacity of the condenser, evaporator, sub-cooler, and expansion valve produce a compression ratio of less than about 4:1 relative to the compressor. 
         [0011]    In one embodiment, a heat transfer fluid processed by the system has a temperature drop of less than about 7° F. across the evaporator. 
         [0012]    In one embodiment, the refrigerant processed by the system has a temperature drop of less than about 60° F. across the evaporator. 
         [0013]    In one embodiment, the refrigerant processed by the system has a pressure drop of less than about 10 psig across the evaporator. 
         [0014]    In one embodiment, the heat transfer fluid processed by the system has a temperature of less than about 8° F. at the compressor. 
         [0015]    In one embodiment, the temperature of the refrigerant emerging from the evaporator is less than about 80° F. 
         [0016]    In one embodiment, the refrigerant processed by the system has a temperature drop of at least than about 30° F. across the condenser. 
         [0017]    In one embodiment, a pressure drop of the refrigerant across the condenser is less than about 11 psig. 
         [0018]    In one embodiment, the heat transfer fluid processed by the system has a rise in temperature of less than about 10° F. at the condenser. 
         [0019]    In one embodiment, the refrigerant processed by the system has a temperature drop of at least than about 40° F. across the sub-cooler. 
         [0020]    In one embodiment, a pressure drop of the refrigerant across the sub-cooler is less than about 1.5 psig. 
         [0021]    In one embodiment, the heat transfer fluid processed by the system has a drop in temperature of at least about 40° F. across the sub-cooler. 
         [0022]    In one embodiment, the system further comprises a cabinet. 
         [0023]    In one aspect, the present technology provides a method of using a modular refrigeration and heat reclamation chiller system comprising the step of circulating both a refrigerant and a heat transfer fluid through the system comprising an evaporator configured to vaporize a refrigerant to cool a refrigerant, a compressor coupled to the evaporator and configured to compress the refrigerant, a condenser coupled to the compressor and configured to condense the refrigerant compressed by the compressor to the refrigerant, a sub-cooler coupled to the condenser and configured to receive the refrigerant from the condenser so as to selectively extract heat from the refrigerant and to transfer the refrigerant to the evaporator, and an expansion valve coupled to both the sub-cooler and the evaporator. 
         [0024]    In one embodiment, the system provides a heated heat transfer fluid of about 100° F. and a refrigerated heat transfer fluid of about 10° F. 
         [0025]    In one aspect, the present technology provides a method of manufacturing a modular refrigeration and heat reclamation chiller system comprising providing a modular refrigeration and heat reclamation chiller system comprising an evaporator configured to vaporize a refrigerant to cool a refrigerant, a compressor coupled to the evaporator and configured to compress the refrigerant, a condenser coupled to the compressor and configured to condense the refrigerant compressed by the compressor to the refrigerant, a sub-cooler coupled to the condenser and configured to receive the refrigerant from the condenser so as to selectively extract heat from the refrigerant and to transfer the refrigerant to the evaporator, and an expansion valve coupled to both the sub-cooler and the evaporator. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0026]      FIG. 1  illustrates an exemplary embodiment of a front view of a chiller system. 
           [0027]      FIG. 2  illustrates an exemplary embodiment of a rear view of a chiller system. 
           [0028]      FIG. 3  illustrates an exemplary embodiment of a left side view of a chiller system. 
           [0029]      FIG. 4  illustrates an exemplary embodiment of a right side view of a chiller system. 
           [0030]      FIG. 5  illustrates a schematic view of a chiller system. 
           [0031]      FIG. 6  illustrates an exemplary embodiment of a front view of a chiller system. 
           [0032]      FIG. 7  illustrates an exemplary embodiment of a rear view of a chiller system. 
           [0033]      FIG. 8  illustrates an exemplary embodiment of a left side view of a chiller system. 
           [0034]      FIG. 9  illustrates an exemplary embodiment of a top view of a chiller system. 
       
    
    
     DETAILED DESCRIPTION 
       [0035]    Reference will now be made in detail to embodiments of the technology, examples of which are illustrated in the accompanying drawings. It is to be understood that other embodiments may be utilized and structural and functional changes may be made without departing from the respective scope of the technology. 
         [0036]    Reuse of heated and cooled fluids from a chiller system  100  produces an environmentally conscious process and reduces waste otherwise released from the system. Non-limiting examples of places a chiller system  100  can be used include an ice rink facility, an airplane hangar, a commercial building, a residential home, apartment and/or condominium buildings, restaurants, food trucks, portable food and/or beverage dispensing carts, etc. Other suitable locations may include a location having a need to both cool and heat fluids. 
         [0037]    The term fluid or heat transfer fluid may refer to at least one gaseous fluid, a liquid fluid, a superheated fluid, a supercooled fluid, a frozen fluid, or any combination thereof. For example, the fluid may be comprised of glycols, methanol, ethanol, water, waste fluids, steam, snow or other precipitation, and any combination thereof. 
         [0038]    With reference to  FIG. 1 , a front view of a chiller system  100  is depicted. The chiller system  100  generally includes a power source  102 . The power source  102  may include for example, an electrical source, batteries and/or fuel cells, electromechanical systems such as generators and alternators, solar power, and any combination thereof. 
         [0039]    Although depicted on the front of the chiller system  100 , at least one status light  104  and user interface  106  may optionally be provided at any location on the exterior or interior of cabinet  150  of the chiller system  100 . 
         [0040]    The at least one status light  104  may indicate whether the chiller system is on or off. In addition the status light  104  may be a plurality of lights. Status light  104  may be a display for operational information based on the chiller system  100 . 
         [0041]    User interface  106  may be used to show operations indicia, such as energy levels, capacity, output, measurement of time to complete a cycle, warnings, status updates, etc. Other known display information may be shown on the user interface  106 . User interface  106  may be a screen, such as an LCD, LED, touch panel, keypad, sensor, etc. In an embodiment, user interface  106  may be partially or fully removable and/or remotely accessible to provide an operator information on the status of the chiller system  100 . In an embodiment, user interface  106  may serve as a control system for controlling and protecting a motor of a compressor  300  and an expansion valve  250 , depending on facility needs. 
         [0042]    Cabinet  150  may further be equipped with at least one door  152  and handle  154 . In an embodiment, cabinet  150  is in a modular enclosure, such as a cube-shaped enclosure. In an embodiment, cabinet  150  has removable doors and/or walls. In an embodiment, cabinet  150  has removable front, right, and left walls. The cabinet  150  may optionally include a top. 
         [0043]    Cabinet  150  may be used to cover all the interior components of the chiller system  100 . The cabinet  150  may be insulated, e.g., with a ¾ inch closed-cell insulation, fiberglass, polyurethane, cotton, wool, a combination thereof, and may further be made of other known and suitable materials. The cabinet  150  may be further insulated with insulation, e.g. weather stripping, on adjoining portions of the chiller  100  to contain any noise created in the cabinet  150 . The compressor  300  inside of the cabinet  150  may also be insulated to ensure further noise absorption. The cabinet  150  may be formed of metal, e.g. stainless steel, plastic, wood, a combination thereof, and may further be made of other known and suitable materials. In an embodiment, cabinet  150  is formed by metal sheets with steel reinforcements, having removable panels for ease of access and service. 
         [0044]    In addition, other optional components that may be incorporated with the chiller system  100  include at least one door  152 , at least one door handle  154 , a base  156 , and legs and/or wheels  158 . The at least one door  152  may allow an operator access to the interior portion of the chiller system  100 . In an embodiment, door  152  is mounted on a front panel of the cabinet  150  and is hinged to the right in order to provide access to a control panel  106  mounted on an interior of the door. A base  156  may include legs and/or wheels  158  for increased portability of the chiller system  100 . 
         [0045]    With reference to  FIG. 2 , a rear view of a chiller system  100  is depicted. The chiller system  100  may optionally be equipped with at least one ball valve connection sub-cooler/preheater  108  and a valve wiring box  110 . In an embodiment as illustrated by  FIG. 2 , various inlets and outlets for components of the chiller system  100  are generally depicted at  210 ,  220 ,  410 ,  420 , which will be discussed further herein. A base  156  is depicted as having legs for supporting the chiller system  100 . 
         [0046]      FIG. 3  illustrates a left side view of the chiller system  100 . On the left side of the chiller system  100 , there may be a handle  154  on cabinet  150 . 
         [0047]      FIG. 4  illustrates a right side view of the chiller system  100 . There may be a connection a power source  102 , such as two voltage in lines as depicted in  FIG. 4 . On the right side of chiller system  100 , there may be a handle  154  on cabinet  150 . In another embodiment, the power source  102  may be connected to another portion and/or side of the cabinet  150 . 
         [0048]      FIG. 5  illustrates a schematic view of the chiller system  100 . The chiller system  100  is comprised of at least three heat exchangers  200 ,  400 ,  500  and a compressor  300 . In particular, a first heat exchanger may be an evaporator  200 , a second heat exchanger may be a condenser  400 , and a third heat exchanger may be a sub-cooler  500 . In an alternative embodiment, the heat exchangers  200 ,  400 ,  500  may be selected from any one of an evaporator, condenser, and sub-cooler. 
         [0049]    Evaporator  200  includes an inlet  210 , an outlet  220 , a refrigeration inlet  230 , and a refrigeration outlet  240 . The evaporator  200  may be in connection with an expansion valve  250 . Expansion valve  250  can be selected from a suitable electronic expansion valve assembly. Generally, evaporator  200  selectively processes fluids by evaporating liquid to gas, or removing liquids from a mixture of fluids. Non-limiting examples of evaporators include, but are not limited to: natural circulation evaporators; falling film evaporator; rising film evaporator; multiple-effect evaporators; and climbing and falling-film plate evaporators. 
         [0050]    In an embodiment, the evaporator  200  has a series of parallel plates dividing the evaporator  200  into two paths between the plates. In an embodiment, evaporator  200  may have a single plate or multiple plates. 
         [0051]    In an embodiment, the temperature drop across the evaporator  200  of the liquid to be cooled is approximately 7° F. or less. In another embodiment, the temperature drop across the evaporator  200  of the liquid to be cooled is approximately 6.6° F. or less. In yet another embodiment, the temperature drop across the evaporator  200  of the liquid to be cooled is approximately 10° F. or less. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0052]    In an embodiment, the temperature drop across the evaporator  200  of the refrigerant (not shown) is approximately 60° F. or less. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0053]    In an embodiment, the pressure drop in the refrigerant across the evaporator  200  is equal to or less than 10 psig. In another embodiment, the pressure drop in the refrigerant across the evaporator  200  is equal to or less than 9 psig. In yet another embodiment, the pressure drop in the refrigerant across the evaporator  200  is equal to or less than 8.9 psig. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0054]    In an embodiment, the expansion valve  250  may further connect with a sub-cooler  500 , as will be described in more detail below; expansion valve  250  may connect a refrigeration outlet  540  of the sub-cooler  500  to the refrigeration inlet  430  of the condenser  400 . Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0055]    Compressor  300  includes an inlet  310 , an outlet  320 , a refrigeration inlet  330 , and a refrigeration outlet  340 . For example, inlet  310  may be compressor suction. The compressor  300  may further include a first vibration absorber  350  and a second vibration absorber  351 . Compressor  300  may have any one of a variety of pressures, such as a low pressure, medium pressure, high pressure, and/or super high pressure. Compressor  300  may have any one of a variety of capacities, such as a low capacity, medium capacity, and/or a high capacity. Generally, compressor  300  compresses and pressurizes a fluid, and releases the fluid in a controlled manner. Non-limiting examples of compressors include, but are not limited to: reciprocating compressor; rotary screw compressor; turbo compressor; air cooled compressor; and water cooled compressor. In an embodiment, the compressor  300  connects the refrigeration outlet  240  of the evaporator  200  to the refrigeration inlet  430  of the condenser  400 . 
         [0056]    In an embodiment, the compression ratio of the compressor  300  is reduced to a level of less than 6:1. In yet another embodiment, the compression ratio of the compressor  300  is reduced to a level of less than 5:1. In yet another embodiment, the compression ratio of the compressor  300  is reduced to a level of less than 4.5:1. In another embodiment, the compression ratio of the compressor  300  is reduced to a level of less than 4:1. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0057]    The superheat at the compressor  300  is less than 8° F. In another embodiment, the superheat at the compressor  300  is less than less than 12° F., less than 10° F., or even less than 6° F. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0058]    The compressor  300  may be a scroll compressor having a lower decibel (dB) level as compared to a reciprocating compressor. Scroll compressor technology may also refuse the sound emission in lower bands levels, levels which are annoying to a human ear. Two chiller systems  100  may emit less than approximately 60 dB at a distance of three feet. A conventional plant may emit approximately 100 dB at the same distance. 
         [0059]    Condenser  400  includes an inlet  410 , an outlet  420 , a refrigeration inlet  430 , and a refrigeration outlet  440 . Generally, condenser  400  is a device used to condense a fluid into liquid through cooling. Non-limiting examples of condensers include, but are not limited to: surface condenser; Liebig condenser; Graham condenser; Allihn condenser; direct contact condenser, etc. 
         [0060]    In an embodiment, the condenser  400  has a series of parallel plates dividing the condenser  400  into two paths between the plates. In an embodiment, condenser  400  may have a single plate or multiple plates. 
         [0061]    The temperature drop in a refrigerant across the condenser  400  is substantially maintained so the refrigerant emerging through the refrigeration outlet  440  is less than 80° F. In another embodiment, the refrigerant emerging through the refrigeration outlet  440  of the condenser  400  is less than 90° F., less than 85° F., less than 82° F., less than 78° F., or less than 75° F. In another embodiment, the temperature drop in a refrigerant across the condenser  400  is substantially equal to or greater than 28° F. In yet another embodiment, the temperature drop in a refrigerant across the condenser  400  is substantially equal to or greater than 30° F. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0062]    The temperature rise across the condenser  400  of the liquid to be heated is approximately 10° F. or less. In yet another embodiment, the temperature rise across the condenser  400  of the liquid to be heated is approximately 15° F. or less. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0063]    The pressure drop of the refrigerant across the condenser  400  is equal to or less than 11 psig. In another embodiment, the pressure drop of the refrigerant across the condenser  400  is equal to or less than 11 psig. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0064]    Sub-cooler  500  includes an inlet  510 , an outlet  520 , a refrigeration inlet  530 , and a refrigeration outlet  540 . Generally, sub-cooler  500  cools a refrigerant below its saturation temperature, forcing the fluid to change its phase. Sub-cooling may be performed inside or outside the heat exchanger represented by sub-cooler  500 . Non-limiting examples of sub-coolers include condenser sub-cooling; total sub-cooling; artificial sub-cooling; natural sub-cooling; and mechanical sub-cooling; etc. 
         [0065]    In an embodiment, the sub-cooler  500  has a series of plates dividing the sub-cooler  500  into two paths between the plates. In an embodiment, sub-cooler  500  may have a single plate or multiple plates. 
         [0066]    In an embodiment, the temperature of the refrigerant at the refrigeration outlet  540  of the sub-cooler  500  is approximately equal to or less than 80° F. 
         [0067]    In an embodiment, the pressure drop in the refrigerant across the sub-cooler  500  is equal to or less than 1.5 psig. In another embodiment, the pressure drop in the refrigerant across the sub-cooler  500  is equal to or less than 1.43 psig. In yet another embodiment, the pressure drop in the refrigerant across the sub-cooler  500  is equal to or less than 3 psig. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0068]    In an embodiment, the temperature drop in the refrigerant across the sub-cooler  500  is approximately 40° F. and the temperature rise in the fluid between the inlet  510  and outlet  520  is up to 40° F. Here as elsewhere in the specification and claims, numerical values may be combined to form new or undisclosed ranges. 
         [0069]    In an embodiment, the sub-cooler  500  has the capacity to reduce the refrigerant temperature by up to 40° F. while increasing the inlet fluid  510  temperature by up to 40° F., thus decreasing the horsepower of the cooling capacity of the chiller system  100  by approximately 20% per ton. 
         [0070]    A refrigerant is at least one working fluid which transfers heat from or to the system, which is desirably excluded from environments where its presence or the presence of a relatively toxic refrigeration fluid would present health or safety concerns. Refrigerant may be circulated in the chiller system  100  using a refrigeration inlet  610  and a refrigeration outlet  620 . The term refrigerant generally refers to, but is not limited to, one or more refrigerants, which may be present in one or more phases, e.g. liquid, gaseous, solid, and can include other non-refrigerant materials) in one or more phases. For example, the refrigerant mixture can include a liquid refrigerant present in gaseous and liquid form, as well as a lubricant material such as oil or another refrigerant serving also as a lubricant material. As another example, the refrigerant mixture can be distributed into the shell of an evaporator, such as by using a distributor to distribute the gaseous portion of the refrigerant mixture in a manner of flow that is different relative to the distribution and manner of flow of the liquid portion of the refrigerant mixture. In an embodiment, the manner of flow of the gaseous portion may be optimized to achieve a desired flow to facilitate heat transfer, such as in a uniform flow through the distributor, while the manner of flow of the liquid portion may be concentrated, and distributed by the distributor from a designated area, such phase biased distribution of the liquid versus the gaseous portion of the refrigerant mixture can be achieved. 
         [0071]    The chiller system  100  may optionally include a sight glass  710 , and/or a filter dryer  720 . 
         [0072]      FIG. 6  illustrates an embodiment of a front view of an assembled modular chiller system  100 . In  FIG. 6 , a front view shows an evaporator refrigeration inlet  230 , evaporator refrigeration outlet  240 , expansion valve  250 , compressor outlet  320 , sight glass  710 , and filter dryer  720 . 
         [0073]      FIG. 7  illustrates an embodiment of a rear view of an assembled modular chiller system  100 . In  FIG. 7 , a rear view shows an evaporator  200 , evaporator inlet  210 , evaporator outlet  220 , condenser  400 , condenser inlet  410 , condenser outlet  420 , condenser inlet  410 , sub-cooler inlet  510 , and sub-cooler outlet  520 . 
         [0074]      FIG. 8  illustrates an embodiment of a side view of an assembled modular chiller system  100 . In  FIG. 8 , a side view shows an evaporator  200 , expansion valve  250 , compressor  300 , condenser  400 , sub-cooler  500 , sight glass  710 , filter dryer  720 , and vibration absorbers  350 ,  351 . Further,  FIG. 8  illustrates evaporator inlet  210 , evaporator outlet  220 , compressor inlet  310 , condenser inlet  410 , condenser outlet  420 , condenser refrigeration inlet  430 , condenser refrigeration outlet  440 , sub-cooler inlet  510 , and sub-cooler outlet  520 . 
         [0075]      FIG. 9  illustrates an embodiment of a top view of an assembled modular chiller system  100 . In  FIG. 9 , a top view shows an evaporator  200 , compressor  300 , vibration absorbers  350 ,  351 , condenser  400 , sub-cooler  500 , sight glass  710 , and filter dryer  720 . 
         [0076]    In an embodiment, the following are provided for the chiller system  100 : a compressor  300 , having 20 tons of refrigeration capacity; a condenser  400 , having a capacity of 22.2 tons of refrigeration; an expansion valve  250 , having 49 tons of capacity; and an evaporator  200 , having 29 tons of capacity. 
         [0077]    In one embodiment, the chiller system  100  includes an evaporator  200 , sub-cooler  500 , expansion valve  250 , filter dryer  720 , and a sight glass  710 . A fluid, such as a compressed vapor at outlet  320  is supplied to the refrigeration inlet  430  of the condenser  400 , which forms a refrigerant condensate discharging from refrigeration outlet  440 . The condensate from the condenser  400  at the refrigeration outlet  440  passes through piping to a liquid line sub-cooler refrigeration inlet  530 . The liquid refrigerant is sub-cooled by 40° F. where it exits at refrigeration outlet  540 . Through piping systems the liquid refrigerant then passes through a refrigeration sight glass  710  and a filter dryer  720 , and then is metered by an electronic expansion valve  250 . The saturated liquid is metered through the expansion valve  250  and supplied to refrigeration inlet  230  of the evaporator  200 . In the evaporator  200 , the saturated liquid completes its phase changes to a super-heated vapor and exits at the refrigeration outlet  240 . A low temperature super-heated vapor is now connected through piping to the inlet  310  of the compressor  300 . Within the compressor  300 , the low temperature super-heated vapor is compressed and converted to a high pressure, high temperature vapor. This vapor exits the compressor at outlet  320 . Although this generally forms a complete refrigeration circuit of the chiller system  100 , additional processes may be included in this circuit. In the condenser  400  a high temperature super-heated refrigerant vapor has a phase change to a refrigerant liquid, wherein the heat produced by this phase change is absorbed by the fluid pumped through the condenser  400  from inlet  410  through outlet  420 . In the sub-cooler  500 , as the liquid refrigerant passes through the sub-cooler  500 , the pumped fluid from the inlet  510  to the outlet  520  absorbs the heat sub-cooling the liquid refrigerant. In the evaporator  200 , heat is extracted from the fluid pumped from inlet  210  and through outlet  220 , and the fluid that emerges from the evaporator  200  is chilled. The evaporator  200 , sub-cooler  500 , and condenser  400  may each use more than one flat plate so fluid passing through transfers heat through these plates. 
         [0078]    In an embodiment, the efficiency of the chiller system  100  is greater than 0.9 tons/hp. In an embodiment, the chiller system  100  is assembled in the cabinet  150  such that the evaporator  200  and condenser  400  are at opposing walls of the cabinet  150 . The compressor  300  is located between the condenser  400  and evaporator  200 , and is mounted on legs with a rubber mounting device, although an alternative mounting device may be envisioned. Within cabinet  150 , a filter for the refrigerant is located in front of the compressor  300 . Generally, the chiller system is contained within the cabinet  150 . 
         [0079]      FIGS. 1-9  illustrate non-limiting exemplary embodiments of the chiller system. Other examples of locations for placement, containment, and access to a chiller system may be envisioned. Other configurations and shapes, other than a substantially modular or cube shape may also be envisioned. Those skilled in the art will readily appreciate that changes and/or modifications may be made thereto without departing from the spirit and scope of the chiller system. 
         [0080]    Other functionally inconsequential additives or steps may also be included without departing from the principles of this technology. While these articles expressly cover all foreseeable equivalents of the elements recited above, additional variations are possible. For example, it is possible to include a remote control for operating the chiller system. 
         [0081]    The foregoing detailed description has been given for clearness of understanding only and no unnecessary limitations should be understood therefrom as some modifications will be obvious to those skilled in the art without departing from the scope and spirit of the appended claims.