CN112682978A - Compression and absorption combined cycle refrigerating plant - Google Patents
Compression and absorption combined cycle refrigerating plant Download PDFInfo
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- CN112682978A CN112682978A CN202110009407.0A CN202110009407A CN112682978A CN 112682978 A CN112682978 A CN 112682978A CN 202110009407 A CN202110009407 A CN 202110009407A CN 112682978 A CN112682978 A CN 112682978A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a compression and absorption combined cycle refrigerating device, which comprises a compressor and a generator, wherein the compressor is connected with a high-temperature condenser, the high-temperature condenser is positioned in the generator, the high-temperature condenser is connected with a low-temperature heat exchanger, the low-temperature heat exchanger is connected with a primary throttling valve, and the primary throttling valve is connected with a primary evaporator; the generator is connected with the solution heat exchanger, the solution heat exchanger is connected with the absorber, the absorber is connected with the secondary evaporator, the secondary evaporator is connected with the secondary throttling valve, the secondary throttling valve is connected with the secondary condenser, and the secondary condenser is connected with the generator. The invention embeds the high temperature condenser for compression refrigeration into the generator for absorption refrigeration, and completely utilizes the heat discharged by the compressed refrigerant to drive the absorption refrigeration, so that the two refrigeration cycles run jointly. Therefore, the refrigeration energy efficiency is greatly improved, the refrigeration heat emission is reduced, the energy consumption and the operation cost are reduced, and the green refrigeration is realized.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a compression and absorption combined cycle refrigeration device.
Background
With the rapid development of economy in China, the living standard of people is continuously improved, the energy consumption is rapidly increased, and the total energy consumption of China is ranked second in the world at present. The air conditioning refrigeration technology is widely applied to national production and life, the refrigeration energy consumption occupies a part of the total energy consumption of China, and how to improve the efficiency of a refrigeration system and reduce the refrigeration energy consumption is the key point of refrigeration technology research. Two major refrigeration technologies in the refrigeration industry today are vapor compression refrigeration and absorption refrigeration. The vapor compression refrigerating unit is widely used due to small volume, stable operation and high refrigerating efficiency, but the compression refrigerating operation mainly depends on electric power, and the electric energy consumption is large. The absorption refrigeration operation mainly depends on heat power, the consumption of electric power is very low, but the absorption refrigeration unit has large volume and complex operation, particularly the refrigeration efficiency of the absorption refrigeration unit is obviously lower than that of the refrigeration unit, so that the absorption refrigeration unit is only suitable for being used when a waste heat source is available or the absorption refrigeration unit is seriously lack of electricity, and the device combining the advantages of the absorption refrigeration unit and the refrigeration unit is required to reduce the energy consumption while meeting the refrigeration requirement.
Disclosure of Invention
The invention aims to provide a compression and absorption combined cycle refrigerating device which can utilize heat discharged by a compressed refrigerant to drive absorption refrigeration so as to enable two refrigeration cycles to run in a combined mode. Therefore, the refrigeration energy efficiency is greatly improved, the energy consumption and the operation cost are reduced, and green refrigeration is realized.
The invention provides a compression and absorption combined cycle refrigerating device, which comprises a compressor and a generator, wherein the compressor is connected with a high-temperature condenser, the high-temperature condenser is positioned in the generator, the high-temperature condenser is connected with a low-temperature heat exchanger, the low-temperature heat exchanger is connected with a primary throttling valve, the primary throttling valve is connected with a primary evaporator, and a primary refrigerant pipe penetrates through the primary evaporator; the generator is connected with the solution heat exchanger, the solution heat exchanger is connected with the absorber, the absorber is connected with the secondary evaporator, the secondary refrigerant pipe penetrates through the secondary evaporator, the secondary evaporator is connected with the secondary throttle valve, the secondary throttle valve is connected with the secondary condenser, and the secondary condenser is connected with the generator.
Furthermore, the lower end of the secondary evaporator is connected with the liquid inlet end of the secondary refrigerant pump, and the liquid outlet end of the secondary refrigerant pump is connected with the spray pipe at the upper end of the secondary evaporator.
Further, the upper end of the secondary evaporator is connected with the upper end of the absorber,
furthermore, the upper end of the secondary evaporator is connected with one end of a secondary throttle valve, and the other end of the secondary throttle valve is connected with the lower end of the secondary condenser.
Furthermore, the lower end of the absorber is connected with the liquid inlet end of a second solution pump, and the liquid outlet end of the second solution pump is connected with the lower end of the solution heat exchanger.
Further, the lower extreme of absorber is connected with the inlet end of first solution pump, the lower extreme of solution heat exchanger with the inlet end of first solution pump is connected, the play liquid end of first solution pump with the shower of the upper end of absorber is connected.
Furthermore, the upper end of the generator is connected with a first regulating valve, the first regulating valve is connected with the upper end of the solution heat exchanger, the lower end of the generator is connected with a second regulating valve, and the second regulating valve is connected with the upper end of the solution heat exchanger.
Furthermore, the upper end of the low-temperature heat exchanger is connected with the first regulating valve, and the lower end of the low-temperature heat exchanger is connected with the liquid outlet end of the second solution pump.
Further, the lower extreme of cooling tower is connected with the feed liquor end of cooling pump, the play liquid end and the cooling tube connection of cooling pump, the cooling tube includes first coil pipe heat exchanger, second coil pipe heat exchanger and water distributor.
Further, the first coil heat exchanger is located in the absorber, the second coil heat exchanger is located in the secondary condenser, and the water distribution pipe is located in the cooling tower.
The technical scheme of the invention is that the high-temperature condenser for compression refrigeration is embedded into the generator for absorption refrigeration, and the heat discharged by the compressed refrigerant is completely utilized to drive the absorption refrigeration, so that the two refrigeration cycles run jointly. Therefore, the refrigeration energy efficiency is greatly improved, the refrigeration heat emission is reduced, the energy consumption and the operation cost are reduced, and the green refrigeration is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic view of a cooling tube configuration according to the present invention;
FIG. 3 is a schematic diagram of the compression refrigeration system of the present invention;
FIG. 4 is a schematic diagram of the absorption refrigeration system of the present invention;
description of reference numerals: 1-a compressor, 2-a high-temperature condenser, 3-a low-temperature heat exchanger, 4-a first throttling valve, 5-an evaporator, 6-a generator, 7-a first regulating valve, 8-a second regulating valve, 9-a solution heat exchanger, 10-a first solution pump, 11-a second solution pump, 12-an absorber, 13-a secondary refrigerant pump, 14-a cooling pump, 15-a secondary evaporator, 16-a secondary throttling valve, 17-a secondary condenser, 18-a cooling tower, 19-a cooling pipe, 191-a first coil heat exchanger, 192-a second coil heat exchanger, 193-a water distribution pipe, 20-a primary refrigerant pipe and 21-a secondary refrigerant pipe;
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
as shown in fig. 1-4:
a compression and absorption combined cycle refrigerating device comprises two parts of compression refrigeration and absorption refrigeration:
compression refrigeration:
the system consists of a compressor 1, a high-temperature condenser 2, a low-temperature heat exchanger 3, a primary throttle valve 4, an evaporator 5 and other equipment and connecting pipelines. The compressor 1 is connected with a high-temperature condenser 2, the high-temperature condenser 2 is positioned in a generator 6, the high-temperature condenser 2 is connected with a low-temperature heat exchanger 3, the low-temperature heat exchanger 3 is connected with a primary throttling valve 4, the primary throttling valve 4 is connected with a primary evaporator 5, and a primary refrigerant pipe 20 penetrates through the primary evaporator 5. The primary condenser is divided into a high-temperature condenser 2 and a low-temperature heat exchanger 3, the high-temperature condenser 2 is positioned in a generator 6, and heat discharged by compressed refrigerant is utilized to drive absorption refrigeration, so that two refrigeration cycles run jointly. Therefore, the refrigeration energy efficiency is greatly improved, the energy consumption and the operation cost are reduced, and green refrigeration is realized.
The compression refrigeration in the technical description takes an R22 water-cooled screw type compressor unit as a design prototype, but does not influence the application of the compression refrigeration unit adopting other refrigerants in combined refrigeration. The refrigerant for compression refrigeration may be a whole-system refrigerant such as ammonia, carbon dioxide, freon, or the like.
The working principle is as follows:
the primary refrigerant absorbs heat of the primary refrigerant in the primary evaporator 5 and evaporates into refrigerant vapor. The heat Qc1 absorbed in the process is the refrigeration capacity of the compression refrigeration. The compressor 1 sucks and pressurizes the refrigerant vapor to generate high-temperature and high-pressure vapor. The amount of electricity consumed by the compressor 1 is q, which is the electrical power of the compressor 1. The coefficient of performance COP of the primary compression refrigeration is Qc1 q. The high pressure steam releases heat in the primary condenser. The primary condenser is divided into a high-temperature condenser 2 and a low-temperature heat exchanger 3 according to high and low temperatures, and the high-temperature condenser 2 is arranged in a generator 6 of the absorption refrigerator. The heat of the refrigerant vapor discharged from the high-temperature condensation section is used for heating the absorbent high-temperature solution in the generator 6, and meanwhile, the temperature of the refrigerant is reduced to about 80 ℃, and then the refrigerant enters the low-temperature heat exchanger 3. The refrigerant vapor exchanges heat in the cryogenic heat exchanger 3 with the absorbent cryogenic solution exiting the absorber 12. Thereby finally cooling to liquid refrigerant of about 40 ℃. The total heat Q3 of the refrigerant discharged in the high and low temperature heat exchanger 3 is Q3 ═ Qc1+ Q in a simplified condition without considering losses. The liquid refrigerant is depressurized by the primary throttle valve 4, and then is evaporated and gasified again in the evaporator 5. Thereby forming a primary compression refrigeration cycle.
Absorption refrigeration:
the system mainly comprises a secondary evaporator 15, an absorber 12, a generator 6, a low-temperature heat exchanger 3, a solution heat exchanger 9, a secondary condenser 17, a secondary throttle valve 16, a cooling tower 18, a cooling pump 14, a first solution pump 10, a second solution pump 11, a secondary refrigerant pump 13, a first regulating valve 7, a second regulating valve 8 and other equipment and connecting pipelines. The generator 6 is connected with the solution heat exchanger 9, the solution heat exchanger 9 is connected with the absorber 12, the absorber 12 is connected with the secondary evaporator 15, the secondary refrigerant pipe 21 penetrates through the secondary evaporator 15, the secondary evaporator 15 is connected with the secondary throttle valve 16, the secondary throttle valve 16 is connected with the secondary condenser 17, and the secondary condenser 17 is connected with the cooling tower 18.
The lower end of the secondary evaporator 15 is connected with the liquid inlet end of the secondary refrigerant pump 13, and the liquid outlet end of the secondary refrigerant pump 13 is connected with the spray pipe of the secondary evaporator 15. The upper end of the secondary evaporator 15 is connected with the upper end of the absorber 12, the upper end of the secondary evaporator 15 is connected with one end of a secondary throttle valve 16, and the other end of the secondary throttle valve 16 is connected with the lower end of a secondary condenser 17.
The lower end of the absorber 12 is connected with the liquid inlet end of the second solution pump 11, and the liquid outlet end of the second solution pump 11 is connected with the lower end of the solution heat exchanger 9. The lower end of the absorber 12 is connected with the liquid inlet end of the first solution pump 10, the lower end of the solution heat exchanger 9 is connected with the liquid inlet end of the first solution pump 10, and the liquid outlet end of the first solution pump 10 is connected with the spray pipe of the absorber 12. The upper end of generator 6 is connected with first governing valve 7, and first governing valve 7 is connected with the upper end of solution heat exchanger 9, and the lower extreme of generator 6 is connected with second governing valve 8, and second governing valve 8 is connected with the upper end of solution heat exchanger 9. The upper end of the low-temperature heat exchanger 3 is connected with the first regulating valve 7, and the lower end of the low-temperature heat exchanger 3 is connected with the liquid outlet end of the second solution pump 11.
The lower end of the cooling tower 18 is connected with the liquid inlet end of the cooling pump 14, the liquid outlet end of the cooling pump 14 is connected with the cooling pipe 19, and the cooling pipe 19 comprises a first coil heat exchanger 191, a second coil heat exchanger 192 and a water distribution pipe 193. The first coil heat exchanger 191 is located in the absorber 12, the second coil heat exchanger 192 is located in the secondary condenser 17, and the water distributor 193 is located in the cooling tower 18.
Absorption refrigeration is a work pair formed by a refrigerant and an absorbent, and the refrigerant forms a gas-liquid circulation through heating and cooling, so that refrigeration is realized. The absorption refrigeration in the combined refrigeration process can be suitable for all absorption refrigeration working pairs. The secondary absorption refrigeration in the technical explanation takes a single-effect lithium bromide refrigeration unit as a prototype, but does not influence the application of the absorption refrigeration unit adopting other working pairs in the combined refrigeration process.
The working principle is as follows:
the secondary refrigerant absorbs heat of the secondary refrigerant water in the secondary evaporator 15, and is evaporated and gasified. The heat quantity Qc2 absorbed in the process is the refrigerating capacity of the secondary refrigeration. The secondary refrigerant vapor is absorbed by the absorbent solution in the absorber 12, and the heat of vaporization is taken away by the cooling water in the first coil heat exchanger 191. The solution pump pressurizes the absorbent solution and divides the absorbent solution into two streams, one stream passes through the low-temperature heat exchanger 3 and absorbs the heat of the primary refrigerant; the other passes through a solution heat exchanger 9 to absorb the heat of the high-temperature absorbent solution. And finally flows through the regulating valve into the generator 6. The solution heat exchanger 9 exchanges heat between the concentrated solution and the dilute solution, so that the temperature of the absorbent solution flowing into the absorber 12 is lowered, and the temperature of the absorbent solution flowing into the generator 6 is raised. The absorbent solution in the generator 6 is heated to boiling by the built-in high-temperature condenser 2 to generate secondary refrigerant vapor. The heat Q3 released by the primary refrigerant in the high-temperature condenser 2 and the low-temperature heat exchanger 3 is the heat source for driving the secondary absorption refrigeration cycle, and COP is Qc2: Q3. The secondary refrigerant in the secondary condenser 17 is cooled by the cooling water in the second coil heat exchanger 192 and condenses to a low temperature liquid refrigerant. The heat Qp taken away by the cooling water is the discharge heat of the cooling tower 18. The power of the motor of the auxiliary unit in the absorption refrigeration is small, and Qp is Q3+ Qc2 when the calculation is simplified. The low-temperature refrigerant water is decompressed by the secondary throttle valve 16, and then is subjected to heat absorption and evaporation again in the secondary evaporator 15 to form a complete absorption refrigeration cycle.
The invention deduces and analyzes the performance coefficients:
compression refrigeration units are widely used, with large water-cooled refrigeration units having a much higher COP than small air-cooled refrigeration units according to GB/T19577-2015. This is because the condensing temperature of the condenser in the water cooling system is about 40 ℃, or even lower, which is beneficial to the heat dissipation of the refrigerant. In the combined refrigeration process, the heat discharged by the primary compressed refrigerant in the condenser is not directly taken away by the cooling water, but is used for heating the absorbent solution in the absorption refrigeration unit. The condenser for primary compression refrigeration is divided into two sections. Wherein the condensation temperature of the high-temperature condenser 2 is about 80 ℃, and the condensation temperature of the final low-temperature heat exchanger 3 is about 40 ℃, which is consistent with the water-cooling refrigeration cycle. Therefore, the coefficient of performance COP of the primary compression refrigeration in the combined refrigeration cycle is selected according to the COP 4.2-8.1 of the water-cooled compression refrigerator. At present, the COP of a water-cooled screw compressor is about 5.5, and the COP of a centrifugal compressor is higher. For this reason, in the present derivation, the coefficient of performance COP in primary compression refrigeration is 5.5, the power Q of the primary compression refrigeration compressor 1, the cooling capacity Qc1 is 5.5 × Q, and the heat quantity discharged in primary compression refrigeration Q3 is Qc1+ Q is 6.5Q.
The secondary absorption refrigeration is a working pair formed by a refrigerant and an absorbent, and the heating and cooling are improved to enable the refrigerant to complete gas-liquid circulation, so that the refrigeration is realized. The different operating pairs affect the coefficient of performance of the absorption refrigeration cycle from the different temperatures occurring in the generator 6. Most of the discharge temperature after the primary refrigerant compression meets the generation temperature requirement of the generator 6 of the lithium bromide absorption refrigerating unit. Therefore, the performance coefficient COP of the combined refrigeration and secondary absorption refrigeration is selected by referring to the COP of the lithium bromide absorption unit on the market. (according to GB/T18362-2008 COP of the lithium bromide absorption refrigerating unit is more than or equal to 1.10). In the performance coefficient derivation, the secondary absorption refrigeration COP is 1.1. Since the secondary absorption refrigeration is all driven by the primary compression refrigeration discharged heat Q3, the secondary absorption refrigeration capacity Qc2 is 1.1 × Q3 is 7.15Q, and the cooling tower 18 discharged heat Qp is Q3+ Qc2 is 13.65Q.
The total cooling capacity Qc of the combined refrigeration is Qc1+ Qc2 is 12.65q, the total input power q, the total heat discharged is 13.65q, and the total COP is 12.65. The energy efficiency of the combined refrigeration is far higher than that of the compression refrigeration or the absorption refrigeration which is used independently, so that the combined refrigeration system has good effects of saving energy, reducing emission and reducing energy consumption, and greatly improves the energy efficiency ratio of the refrigeration system.
Example 2:
as shown in fig. 1-4:
compared with embodiment 1, the difference of this embodiment is that a large-sized water-cooled centrifugal compressor is used as the compressor 1 for compression refrigeration, and the COP of the large-sized water-cooled centrifugal compressor can reach 8. The absorption refrigeration unit used was the same as that used in example 1, and the COP of the combined refrigeration was increased to 17.9.
The rest is the same as that described in embodiment 1, and the description is omitted.
The invention does not change the respective refrigeration cycle of compression refrigeration and absorption refrigeration, so the technology is mature and reliable. The high-temperature condenser 2 and the low-temperature heat exchanger 3 are arranged, so that all heat discharged by the primary refrigerant is ensured to be utilized by secondary absorption refrigeration, and the requirements of heat dissipation and condensation of the primary refrigerant can be met. The heat discharged in the compression refrigeration process is effectively utilized to push the absorption refrigeration unit to operate. Therefore, how to ensure that the heat discharged in the compression refrigeration process is effectively and efficiently utilized by the absorption refrigeration to realize the derived COP value is the key for implementing the invention. The ideal state of the invention is: the saturation temperature of the compressed primary refrigerant is higher than or equal to the generation temperature of the secondary absorption refrigeration. Thus, the main heat of the primary refrigerant in the high temperature state heats the high temperature absorbent solution in the generator in the high temperature condenser 2. Then, a small part of heat in a low-temperature state exchanges heat with the dilute solution of the low-temperature absorbent from the absorber in the low-temperature heat exchanger, and the whole condensation process is completed. If the pressures of the absorption refrigeration generator 6 and the secondary condenser 17 are simply adjusted, it is also possible to achieve a saturation temperature after the primary refrigerant is compressed that is equal to or higher than the generation temperature of the secondary absorption refrigeration. However, the temperature drop will reduce the secondary absorption refrigeration efficiency and thus the overall COP of the combined refrigeration. As long as the primary refrigerant, the compression form, the secondary absorption refrigeration working pair and the absorption refrigeration form are comprehensively matched according to the relationship among the exhaust temperature and the saturation temperature of the compressed primary refrigerant, the generation temperature and the absorption temperature of the secondary absorption refrigeration, the high-temperature condenser 2 and the low-temperature heat exchanger 3 are reasonably arranged, and the COP (coefficient of performance) of the combined refrigeration can be completely larger than 15 or even close to 20.
According to the technical scheme, the high-temperature condenser 2 for compression refrigeration is embedded into the generator 6 for absorption refrigeration, and the heat discharged by a compressed refrigerant is completely utilized to drive the absorption refrigeration, so that two refrigeration cycles are jointly operated. Therefore, the refrigeration energy efficiency is greatly improved, the refrigeration heat emission is reduced, the energy consumption and the operation cost are reduced, and the green refrigeration is realized.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A combined compression and absorption cycle refrigeration unit comprising: the compressor is connected with a high-temperature condenser, the high-temperature condenser is positioned in the generator, the high-temperature condenser is connected with a low-temperature heat exchanger, the low-temperature heat exchanger is connected with a primary throttling valve, the primary throttling valve is connected with a primary evaporator, and a primary refrigerant pipe penetrates through the primary evaporator; the generator is connected with the solution heat exchanger, the solution heat exchanger is connected with the absorber, the absorber is connected with the secondary evaporator, the secondary refrigerant pipe penetrates through the secondary evaporator, the secondary evaporator is connected with the secondary throttle valve, the secondary throttle valve is connected with the secondary condenser, and the secondary condenser is connected with the generator.
2. A compression and absorption combined cycle refrigeration unit as claimed in claim 1, wherein the lower end of said secondary evaporator is connected to the inlet end of the secondary refrigerant pump, and the outlet end of said secondary refrigerant pump is connected to the shower pipe at the upper end of said secondary evaporator.
3. A combined compression and absorption cycle refrigerant device as set forth in claim 1 wherein the upper end of said secondary evaporator is connected to the upper end of said absorber.
4. A combined compression and absorption cycle refrigerant device as set forth in claim 1, wherein the upper end of said secondary evaporator is connected to one end of a secondary throttling valve, and the other end of said secondary throttling valve is connected to the lower end of said secondary condenser.
5. A combined compression and absorption cycle refrigeration unit as set forth in claim 1 wherein the lower end of said absorber is connected to the inlet side of a second solution pump, the outlet side of said second solution pump being connected to the lower end of said solution heat exchanger.
6. A combined compression and absorption cycle refrigeration unit as set forth in claim 1 wherein the lower end of said absorber is connected to the inlet of a first solution pump, the lower end of said solution heat exchanger is connected to the inlet of said first solution pump, and the outlet of said first solution pump is connected to the spray pipe at the upper end of said absorber.
7. A combined compression and absorption cycle refrigeration unit as set forth in claim 1 wherein said generator is connected at its upper end to a first damper valve, said first damper valve being connected to the upper end of said solution heat exchanger, said generator being connected at its lower end to a second damper valve, said second damper valve being connected to the upper end of said solution heat exchanger.
8. The combined compression and absorption cycle refrigeration unit as recited in claim 5 wherein the upper end of the cryogenic heat exchanger is connected to the first regulating valve and the lower end of the cryogenic heat exchanger is connected to the outlet side of the second solution pump.
9. The combined compression and absorption cycle refrigeration unit as recited in claim 1 wherein the lower end of the cooling tower is connected to the inlet side of a cooling pump, the outlet side of the cooling pump is connected to cooling tubes, the cooling tubes comprising a first coil heat exchanger, a second coil heat exchanger and a water distributor.
10. A combined compression and absorption cycle refrigeration unit as set forth in claim 9 wherein said first coil heat exchanger is located in said absorber, said second coil heat exchanger is located in said secondary condenser, and said water distributor is located in said cooling tower.
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| CN103423912A (en) * | 2013-07-23 | 2013-12-04 | 华中科技大学 | Small air-cooled absorption type refrigerating machine |
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| CN107323217A (en) * | 2017-07-21 | 2017-11-07 | 天津商业大学 | A kind of CO of waste heat driving absorption refrigeration auxiliary supercooling2Air conditioning for automobiles |
| CN208504785U (en) * | 2018-05-04 | 2019-02-15 | 上海名联供应链管理有限公司 | The freezer condensation waste heat absorption system complementary with solar energy |
| CN110906582A (en) * | 2019-11-22 | 2020-03-24 | 华南理工大学 | Refrigerating system and method based on secondary condensation pressurization absorption and supercooling compression |
| CN211782087U (en) * | 2020-01-21 | 2020-10-27 | 浙江高翔工贸有限公司 | A central air conditioner for increasing efficiency and reducing emissions |
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