CN110057127B - Coupling heat pump heat exchanger - Google Patents
Coupling heat pump heat exchanger Download PDFInfo
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- CN110057127B CN110057127B CN201910455955.9A CN201910455955A CN110057127B CN 110057127 B CN110057127 B CN 110057127B CN 201910455955 A CN201910455955 A CN 201910455955A CN 110057127 B CN110057127 B CN 110057127B
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- 230000008878 coupling Effects 0.000 title claims abstract description 8
- 238000010168 coupling process Methods 0.000 title claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 41
- 238000010790 dilution Methods 0.000 claims abstract description 39
- 239000012895 dilution Substances 0.000 claims abstract description 39
- 238000007906 compression Methods 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims description 51
- 239000007788 liquid Substances 0.000 claims description 46
- 238000001704 evaporation Methods 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 230000008020 evaporation Effects 0.000 claims description 33
- 238000009833 condensation Methods 0.000 claims description 30
- 230000005494 condensation Effects 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- VCRNFKKHEIEHCS-UHFFFAOYSA-N 2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]ethanol;methoxymethane Chemical compound COC.OCCOCCOCCOCCO VCRNFKKHEIEHCS-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention provides a coupling heat pump heat exchanger, which is used for realizing the heat exchange process by coupling a two-stage compression process, a dilution regeneration process and a heat pipe heat exchanger. The high-efficiency heat exchanger can select one or more components to form a circulating working medium according to the parameter requirements of heat exchange. Meanwhile, the two-stage compressor can be driven by a steam turbine or a motor, and can work efficiently under the limit working conditions of large temperature difference between a hot side and a cold side and high outlet temperature of the hot side compared with the existing heat exchange mode, so that the heat exchange type air conditioner has remarkable performance advantages.
Description
Technical Field
The invention belongs to the technical field of energy utilization, and particularly relates to a heat exchanger for exchanging heat between cold water and hot water.
Background
In the field of energy utilization, there are a large number of heat exchange processes, and the heat transfer process can be generalized as the transfer from a high temperature fluid to a low temperature fluid or vice versa. According to Newton's second law, heat can be spontaneously transferred from a high-temperature object to a low-temperature object, and can be realized by using a common heat exchanger; if heat is required to be transferred from a low-temperature object to a high-temperature object, a certain cost is required, and a certain amount of high-grade energy sources such as electric power, high-temperature steam or hot water are required to be consumed, and a heat pump, an injection device and the like are required to be used. In the prior art, heat pump technology has gained acceptance and application in the market due to its high efficiency and reliability. The heat pump technology is divided into an absorption heat pump or a compression heat pump mode according to the principle, wherein the absorption heat pump is divided into a first type absorption heat pump and a second type absorption heat pump, the first type absorption heat pump is required to consume high-grade energy to transmit a large amount of heat of a low-temperature object to the high-temperature object, which is also called a heat increasing heat pump, the second type heat pump is not required to consume high-grade energy, and a cold source with lower temperature than the low-temperature object is required, and a small amount of heat of the low-temperature object is extracted to continuously heat the high-temperature object, which is also called a heat increasing heat pump; compression heat pumps require the consumption of mechanical work to transfer heat from low temperature objects to high temperature objects through reverse carnot cycles. The absorption heat pump is limited by thermodynamic cycle and physical properties of a working medium, and can only raise the temperature of a high-temperature object to a limited extent, while the compression heat pump is limited by thermodynamic cycle and physical properties of the working medium, so that the cycle efficiency is rapidly reduced when the temperature of the high-temperature object is greatly raised, and a large amount of work is required to be performed. Therefore, the absorption heat pump and the compression heat pump can only work in the working range with superior performance, so that the application of the heat pump in the process of transferring heat from a low-temperature object to a high-temperature object is limited, namely, the existing heat pump technology can not meet the requirements under the working conditions of large temperature difference between the high-temperature object and the low-temperature object and large temperature rise of the high-temperature object.
In order to solve the application problem, the invention provides a novel efficient heat transfer exchanger for realizing heat transfer from a low-temperature object to a high-temperature object by adopting a dilution-regeneration process, a two-stage compression process and a heat pipe heat exchanger.
Disclosure of Invention
In order to meet the heat exchange requirements of 'large temperature difference between a high-temperature object and a low-temperature object' and 'large temperature rise of the high-temperature object', the invention organically combines a dilution-regeneration process, a vapor compressor and a heat pipe heat exchanger to realize efficient heat transfer from the low-temperature object to the high-temperature object. The heat exchanger comprises a regenerator 1, a condenser 2, a dilution evaporator 3, an evaporation condenser 4, a first vapor compressor 5, a second vapor compressor 6, a first throttle valve 7, a second throttle valve 8, a first circulating pump 9, a second circulating pump 10, a heat pipe heat exchanger 11 and connecting pipelines. The internal circulation working medium comprises a working medium A, a working medium B and a working medium C, wherein the working medium A and the working medium B form a working medium pair, the working medium A is a solid or liquid working medium, the working medium B is a liquid working medium, and the working medium A is dissolved in the working medium B to form a solution. The working medium C is a liquid working medium and can select the same or different components as the working medium B.
The principle and the operation mode of each component unit are as follows: the regenerator 1 realizes the process of extracting the heat of cold water to heat the external solution of the heat transfer tube to boil to generate working medium B steam, the dilute solution is sprayed on the outer surface of the heat transfer tube through a nozzle, continuously boiled to become concentrated solution in the flowing process from top to bottom under the action of gravity and then leaves, and meanwhile, the temperature is reduced after the cold water in the heat transfer tube heats the solution outside the heat transfer tube.
The condenser 2 realizes the condensation process of the working medium B outside the heat transfer pipe from the vapor state to the liquid state, and simultaneously releases heat to heat the hot water in the hot water pipeline 12.
The dilution evaporator 3 realizes the process that the concentrated solution formed by the working medium A and the working medium B absorbs the vapor of the working medium B to be changed into a dilute solution, and the concentrated solution flows outside the vertical heat transfer pipe from top to bottom after passing through the liquid distributor 15, so that the working medium C in the vertical pipe is heated by the condensation heat of the vapor of the working medium B to be changed into a vapor state from a liquid state. The concentrated solution formed by the working medium A and the working medium B absorbs the vapor of the working medium B in the dilution space 3 (B), and the evaporation process of the working medium C is completed in the evaporation space 3 (a).
The evaporation condenser 4 realizes the evaporation process of changing the liquid working medium B into the vapor state, the liquid working medium B is sprayed outside the horizontal heat transfer tube through a nozzle, and is heated by the heat released by the condensation of the working medium C in the horizontal tube to evaporate in the flow process from top to bottom, and the working medium B leaves after changing into the vapor state, and meanwhile, the working medium C leaves after changing into the liquid state.
The first vapor compressor 5 achieves the purpose of compressing and raising the temperature and the pressure of the working medium B vapor from the regenerator 1.
The second vapor compressor 6 achieves the purpose of compressing the working substance C vapor from the dilution evaporator 3 to raise the temperature and pressure thereof.
The first throttle valve 7 and the second throttle valve 8 respectively realize the purposes of reducing temperature and pressure of the liquid working medium C and the liquid working medium B.
The first circulating pump 9 realizes the process that the liquid working medium C which is not evaporated at the bottom of the dilution evaporator 3 is circulated back to the top of the dilution evaporator 3 again to continue evaporating in the vertical pipe.
The second circulation pump 10 achieves the purpose of pressurizing and sending the dilute solution leaving the dilute evaporator 3 to the heat pipe exchanger 11, raising the temperature and then entering the regenerator 1.
The heat pipe exchanger 11 realizes the heat exchange process of the concentrated solution and the dilute solution, and the aim of preheating the dilute solution before entering the regenerator 1 is fulfilled.
The hot water is heated up through the inside of the hot water pipe 12, and the cold water is cooled down through the inside of the cold water pipe 13.
The connection mode of the internal constituent units of the coupling heat pump heat exchanger is as follows:
a first vapor compressor 5 is connected to the regenerator 1 and the condenser 2.
A second vapor compressor 6 is connected to the dilution evaporator 3 and the evaporative condenser 4.
The regenerator 1 is connected to a first vapor compressor 5, a heat pipe exchanger 11 and a cold water line 13.
The condenser 2 is connected to a first vapor compressor 5, a second throttle valve 8 and a hot water line 12.
The dilution evaporator 3 is connected with a heat pipe exchanger 11, a second vapor compressor 6, a first throttle valve 7, an evaporation condenser 4, a second circulating pump 10 and a hot water pipeline.
The evaporative condenser 4 is connected to a second throttle valve 8, the dilution evaporator 3, a first throttle valve 7, a third circulation pump 14 and a second vapor compressor 6.
The heat pipe exchanger 11 is connected to the regenerator 1, the dilution evaporator 3 and the second circulation pump 10.
The internal circulation process of the heat exchanger of the coupled heat pump comprises: and the evaporation and condensation cycle of the working medium B and the evaporation and condensation cycle of the working medium C.
Principle of evaporation and condensation cycle of working medium B: the solution composed of the working medium A and the working medium B is heated by cold water to regenerate a vapor working medium B in the regenerator 1, the vapor working medium B is heated and boosted after entering the first vapor compressor 5, the vapor working medium B is cooled to be liquid after entering the condenser 2 and then leaves, the liquid working medium B enters the evaporation condenser 4 after passing through the second throttle valve 8 and is cooled and decompressed and then enters the evaporation condenser 4 to be heated by the heat released by the condensation of the working medium C to become steam, the steam of the working medium B is absorbed by the solution in the dilution evaporator 3 to complete the condensation process, and the diluted solution after the condensation of the working medium B enters the regenerator 1 through the second circulating pump 10 and the heat pipe heat exchanger 11 to regenerate the vapor working medium B, and the reciprocating circulation is performed.
Principle of evaporation and condensation cycle of working medium C: the liquid working medium C is heated by the heat released by the condensation of the working medium B in the dilution evaporator 3 to become a vapor state, the pressure of the vapor state working medium C is increased after passing through the second vapor compressor 6, the vapor state working medium C is condensed in a horizontal pipe of the evaporation condenser 4 to release heat to become a liquid state, and the liquid working medium C enters the dilution evaporator 3 after being subjected to temperature and pressure reduction through the first throttle valve 7 and is heated to become the vapor state, so that the reciprocating circulation is realized.
As described above, the first vapor compressor 5 and the second vapor compressor 6 may be driven by a steam turbine or a motor, and the compression process of the internal circulation working medium is completed by consuming external steam or electric power.
For working fluid a and working fluid B, the components of working fluid a need to have good solubility in working fluid B to complete the evaporation and condensation process of working fluid B, where working fluid a may be composed of one, two, or more components. For working fluid C, it may be composed of one, two or more components.
The heat exchanger adopts the two-stage vapor compressor, so that the heating amplitude of hot water and the cooling amplitude of cold water can be obviously improved, and the efficiency of the heat exchanger is improved. Firstly, the first vapor compressor 5 compresses the vapor of the working medium B, so that the temperature and the pressure of the vapor are greatly improved, and the condensation temperature of the working medium B is obviously improved in the condenser 2, so that the outlet temperature of hot water is improved. Secondly, the second vapor compressor 6 compresses vapor of the working medium C, so that the evaporating temperature of the working medium C in the dilution evaporator 3 is reduced, and the condensing temperature of the working medium C in the evaporation condenser 4 is improved, therefore, the evaporating temperature of the working medium B of the evaporation condenser 4 is improved, the concentration of dilute solution at the outlet of the dilution evaporator 3 is lower, and cold water can be reduced to a lower temperature in the regenerator 1. The heat exchanger meets the heat exchange requirements of 'large temperature difference between a high-temperature object and a low-temperature object' and 'large temperature rise of the high-temperature object'.
Drawings
Fig. 1 is a flow chart of a coupled heat pump heat exchanger.
Fig. 2 is a flow chart of an embodiment of a coupled heat pump heat exchanger.
Reference numerals: 1-regenerator, 2-condenser, 3-dilution evaporator, 3 (a) -evaporation space, 3 (b) -condensation space, 4-evaporation condenser, 5-first vapor compressor, 6-second vapor compressor, 7-first throttle valve, 8-second throttle valve, 9-first circulating pump, 10-second circulating pump, 11-heat pipe heat exchanger, 12-hot water line, 13-cold water line, 14-third circulating pump, 15-liquid distributor, 16-motor, 17-steam turbine.
Detailed Description
In order to make the purposes, technical solutions and advantages of the implementation of the present invention more clear, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to fig. 2 in the embodiments of the present invention. In fig. 2, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Taking working medium A as dimethyl ether tetraethylene glycol (DMETEEG), working medium B and working medium C as tetrafluoroethane (R134 a) as examples, wherein the DMETEEG and R134a are combined to form a solution, and the evaporation and condensation processes of R134a are realized through the concentration change of the DMETEEG in the solution. Taking fig. 2 as an example, the operation principle of each component and system of the coupled heat pump heat exchanger will be described:
the regenerator 1 realizes the process of extracting the heat of cold water to heat the solution outside the heat transfer tube to boil to generate R134a steam, the dilute solution is sprayed on the outer surface of the heat transfer tube through a nozzle, continuously boiled to become concentrated solution in the flowing process from top to bottom under the action of gravity and then leaves, and meanwhile, the temperature is reduced after the cold water inside the heat transfer tube heats the solution outside the heat transfer tube.
The condenser 2 performs a condensation process of changing the vapor state into the liquid state at the outside of the heat transfer pipe R134a, and simultaneously releases heat to heat the hot water in the hot water pipe 12.
The dilution evaporator 3 realizes the process that the concentrated solution formed by the DMETEG and the R134a absorbs the R134a steam to be changed into a dilute solution, and the concentrated solution flows outside the vertical heat transfer pipe from top to bottom after passing through the liquid distributor 15, so that the R134a in the vertical pipe is heated by utilizing the condensation heat of the R134a steam to be changed into a vapor state from a liquid state. Wherein the absorption of R134a vapor by the concentrated solution composed of DMETEEG and R134a is completed in the dilution space 3 (b), and the evaporation process of R134a is completed in the evaporation space 3 (a).
The evaporation condenser 4 realizes the evaporation process that the liquid R134a is changed into a vapor state, the liquid R134a is sprayed outside the horizontal heat transfer tube through a nozzle, and is heated by heat released by condensation of the R134a in the horizontal tube in the process of flowing from top to bottom to evaporate, the R134a outside the tube is changed into the vapor state and then leaves, and meanwhile, the R134a in the tube is changed into the liquid state and then leaves.
The first vapor compressor 5 achieves the purpose of compressing the R134a vapor from the regenerator 1 to raise its temperature and pressure.
The second vapor compressor 6 achieves the purpose of compressing the R134a vapor from the dilution evaporator 3 to raise its temperature and pressure.
The first throttle valve 7 and the second throttle valve 8 respectively realize the purpose of reducing the temperature and the pressure of the liquid R134 a.
The first circulation pump 9 realizes the process of circulating the liquid R134a which is not evaporated at the bottom of the dilution evaporator 3 back to the top of the dilution evaporator 3 again and continuing to evaporate in the vertical pipe.
The second circulation pump 10 achieves the purpose of pressurizing and sending the dilute solution leaving the dilute evaporator 3 to the heat pipe exchanger 11, raising the temperature and then entering the regenerator 1.
The internal cycling process of this embodiment comprises: two evaporative condensing cycles of R134 a. One cycle is: the solution consisting of the DMETEG and the R134a is heated by cold water in the regenerator 1 to generate a vapor state R134a, the vapor state R134a is heated and boosted after entering the first vapor compressor 5, the vapor state R134a is cooled to be liquid after entering the condenser 2 and then leaves, the liquid state R134a is cooled and decompressed after passing through the second throttle valve 8 and then enters the evaporation condenser 4 to be heated by heat released by the condensation of the R134a in the pipe outside the pipe to become steam, the R134a steam is absorbed by the solution in the dilution evaporator 3 to complete the condensation process, and the diluted solution after the R134a condensation enters the regenerator 1 through the second circulating pump 10 and the heat pipe heat exchanger 11 to generate the vapor state R134a again, and the reciprocating circulation is performed. The other cycle is: the liquid R134a is heated by heat released by condensation of the R134a outside the pipe in the vertical pipe of the dilution evaporator 3 to become a vapor state, the pressure of the vapor state R134a is increased after passing through the second vapor compressor 6, the vapor state R134a is condensed and released by heat in the horizontal pipe of the evaporation condenser 4 to become a liquid state, and the liquid R134a enters the dilution evaporator 3 after being cooled and depressurized by the first throttle valve 7 and is heated to become a vapor state, and the reciprocating cycle is performed.
In this embodiment the second vapor compressor 6 is driven by a steam turbine 17 and the first vapor compressor 5 is driven by a motor 16.
Finally, it should be pointed out that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting. Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A coupled heat pump heat exchanger, characterized by: the heat exchanger comprises a regenerator (1), a condenser (2), a dilution evaporator (3), an evaporation condenser (4), a first vapor compressor (5), a second vapor compressor (6), a first throttle valve (7), a second throttle valve (8), a first circulating pump (9), a second circulating pump (10), a heat pipe heat exchanger (11) and a connecting pipeline;
the coupling heat pump heat exchanger comprises the following components in a connecting mode: the first vapor compressor (5) is connected with the regenerator (1) and the condenser (2), the second vapor compressor (6) is connected with the dilution evaporator (3) and the evaporation condenser (4), the regenerator (1) is connected with the first vapor compressor (5), the heat pipe heat exchanger (11) and the cold water pipeline (13), the condenser (2) is connected with the first vapor compressor (5), the second throttle valve (8) and the hot water pipeline (12), the dilution evaporator (3) is connected with the heat pipe heat exchanger (11), the second vapor compressor (6), the first throttle valve (7), the evaporation condenser (4), the second circulating pump (10) and the hot water pipeline, the evaporation condenser (4) is connected with the second throttle valve (8), the dilution evaporator (3), the first throttle valve (7), the third circulating pump (14) and the second vapor compressor (6), and the heat pipe heat exchanger (11) is connected with the regenerator (1), the dilution evaporator (3) and the second circulating pump (10);
the coupling heat pump heat exchanger is characterized in that a regenerator (1) realizes the process of extracting cold water heat to heat a heat transfer pipe external solution to boil to generate working medium B steam, a condenser (2) realizes the condensing process of changing the working medium B from the steam state to the liquid state outside the heat transfer pipe, simultaneously releases heat to heat hot water in a hot water pipeline (12), a dilution evaporator (3) realizes the process of absorbing the working medium B steam by a concentrated solution formed by the working medium A and the working medium B to be changed into a dilute solution, wherein the process of absorbing the working medium B steam by the concentrated solution formed by the working medium A and the working medium B is completed in a dilution space 3 (B), the evaporating process of the working medium C is completed in an evaporating space 3 (a), and an evaporating condenser (4) realizes the evaporating process of changing the liquid working medium B into the steam state, the liquid working medium B is sprayed outside the horizontal heat transfer pipe through a nozzle, the liquid working medium B is heated by heat released by condensation of the working medium C in the horizontal pipe in the flowing process from top to bottom to be evaporated to be in a vapor state, meanwhile, the working medium C is changed into a liquid state, the first vapor compressor (5) and the second vapor compressor (6) respectively compress the working medium B vapor and the working medium C vapor to raise the temperature and the pressure of the working medium B vapor, the first throttle valve (7) and the second throttle valve (8) respectively realize the purposes of reducing the temperature and the pressure of the liquid working medium C and the working medium B, the first circulating pump (9) realizes the process that the liquid working medium C which is not evaporated at the bottom of the dilution evaporator (3) is circulated again to the top of the dilution evaporator (3) to be evaporated in the vertical pipe, the second circulating pump (10) achieves the aim of pressurizing and sending the dilute solution leaving the dilution evaporator (3) to the heat pipe heat exchanger (11) and then heating the dilute solution to enter the regenerator (1), the heat pipe heat exchanger (11) achieves the heat exchange process of the concentrated solution and the dilute solution, the aim of preheating the dilute solution before entering the regenerator (1) is achieved, hot water is heated up through the inside of the hot water pipeline (12), and cold water is cooled down through the inside of the cold water pipeline (13);
a coupled heat pump heat exchanger internal circulation process as described above comprising: evaporation and condensation cycle of working medium B and evaporation and condensation cycle of working medium C:
(1) principle of evaporation and condensation cycle of working medium B: the solution formed by the working medium A and the working medium B is heated by cold water in a regenerator (1) to generate a vapor working medium B, the vapor working medium B is heated and boosted after entering a first vapor compressor (5), the vapor working medium B is cooled to be liquid after entering a condenser (2) and then leaves, the liquid working medium B is cooled and decompressed after passing through a second throttle valve (8) and enters an evaporation condenser (4) to be heated by heat released by condensation of the working medium C to become steam, and the vapor of the working medium B is absorbed by the solution in a dilution evaporator (3) to complete the condensation process, and the reciprocating cycle is performed;
(2) principle of evaporation and condensation cycle of working medium C: the liquid working medium C is heated by heat released by condensation of the working medium B in the dilution evaporator (3) to become a vapor state, the pressure of the vapor state working medium C is increased after passing through the second vapor compressor (6), the vapor state working medium C is condensed in a horizontal pipe of the evaporation condenser (4) to release heat to become a liquid state, and the liquid working medium C enters the dilution evaporator (3) after being subjected to temperature and pressure reduction through the first throttle valve (7) and is heated to become the vapor state, and the reciprocating cycle is performed;
a coupled heat pump heat exchanger as described above, wherein the first vapor compressor (5) and the second vapor compressor (6) can be driven by a steam turbine or a motor, respectively;
the internal circulation working medium of the coupling heat pump heat exchanger comprises a working medium A, a working medium B and a working medium C, wherein the working medium A and the working medium B form a working medium pair, the working medium A is a solid or liquid working medium, the working medium B is a liquid working medium, the working medium A is dissolved in the working medium B to form a solution, and the working medium C is a liquid working medium and can be selected from substances identical to or different from the working medium B.
2. A coupled heat pump heat exchanger according to claim 1, wherein: the coupled heat pump heat exchanger adopts two stages of vapor compressors at the same time, and each stage of compressors can respectively adopt single-stage or double-stage compression.
3. A coupled heat pump heat exchanger according to claim 1, wherein: working medium A and working medium C are pure or mixture respectively.
4. A coupled heat pump heat exchanger according to claim 1, wherein: the heat pipe heat exchanger is adopted to preheat the dilute solution, and the preheating heat of the dilute solution is obviously improved by reducing the temperature difference between the dilute solution and the concentrated solution, so that the heat exchange efficiency is obviously improved.
5. A coupled heat pump heat exchanger according to claim 1, wherein: the heat released by the condenser (2) is used for heating hot water, steam or chemical fluid medium; the heat extracted by the regenerator (1) is derived from cold water, steam or chemical fluid medium.
6. A coupled heat pump heat exchanger according to claim 1, wherein: the regenerator (1), condenser (2), dilution evaporator (3) and evaporative condenser (4) may each use a single stage or multiple stage scheme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455955.9A CN110057127B (en) | 2019-05-29 | 2019-05-29 | Coupling heat pump heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910455955.9A CN110057127B (en) | 2019-05-29 | 2019-05-29 | Coupling heat pump heat exchanger |
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| CN110057127A CN110057127A (en) | 2019-07-26 |
| CN110057127B true CN110057127B (en) | 2023-12-19 |
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