CN220397891U - Combined heat pump system - Google Patents
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- CN220397891U CN220397891U CN202321466882.1U CN202321466882U CN220397891U CN 220397891 U CN220397891 U CN 220397891U CN 202321466882 U CN202321466882 U CN 202321466882U CN 220397891 U CN220397891 U CN 220397891U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000003507 refrigerant Substances 0.000 claims abstract description 48
- 239000006096 absorbing agent Substances 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 239000002918 waste heat Substances 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims description 91
- 238000005507 spraying Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 claims description 2
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- 238000010521 absorption reaction Methods 0.000 abstract description 22
- 239000007921 spray Substances 0.000 abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 9
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 16
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- 239000003595 mist Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
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- 229910000881 Cu alloy Inorganic materials 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
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- Sorption Type Refrigeration Machines (AREA)
Abstract
The utility model relates to the technical field of heating, and discloses a composite heat pump system which comprises a compressor, a generator, an absorber, an evaporator, a condenser, an ejector, a solution heat exchanger, a solution pump and a pipeline system, wherein an outlet of the ejector is communicated with a spray pipe in the evaporator through a pipeline, a liquid refrigerant outlet of the evaporator is communicated with an ejected medium inlet of the ejector through a pipeline, a steam outlet of the evaporator is communicated with a steam inlet of the absorber through a liquid blocking device, and a solution outlet of the absorber is communicated with a solution pump inlet through a pipeline. Compared with the conventional absorption heat pump, the composite heat pump system can utilize lower-grade waste heat to prepare higher-grade hot water. On the other hand, the pressure difference energy between the condenser and the evaporator is recycled through the ejector, a refrigerant pump is replaced, and the equipment cost and the running power consumption are reduced.
Description
Technical Field
The utility model belongs to the technical field of heating, and particularly relates to a composite heat pump system.
Background
The heat pump is used as an efficient energy utilization device, has wide application in various industries and has remarkable energy-saving and carbon-reducing benefits. At present, the heat pump is mainly divided into two main types of absorption heat pumps and compression heat pumps according to the working principle, wherein the absorption heat pumps are further divided into a first type of absorption heat pump (heat-increasing type) and a second type of absorption heat pump (heat-increasing type), but the absorption heat pump is most applied to the market or the first type of absorption heat pump and the compression heat pump, the absorption heat pump of the first type is mainly applied to the lithium bromide absorption heat pump, and the compression heat pump is wider in application range of the centrifugal heat pump. Both of these heat pumps have their own characteristics and their limitations. The lithium bromide absorption heat pump generally takes fuel gas, steam, high-temperature hot water or flue gas as driving energy, recovers waste heat in low-temperature waste heat of 20-40 ℃, and prepares hot water with the temperature about 40 ℃ higher than that of a low-temperature heat source and the highest hot water temperature of about 85 ℃ for a heat user, so that the energy utilization target with the heating coefficient of about 1.7-2.3 is realized. The centrifugal heat pump takes electric energy as energy to drive a compressor to do work, waste heat in low-temperature waste heat at 20-40 ℃ is recovered, hot water at 85 ℃ is produced at the highest temperature to be supplied to heat users, and the energy utilization target with the heating coefficient of 3-6 is realized; meanwhile, centrifugal heat pumps are classified into a low-temperature heat pump, a medium-temperature heat pump and a high-temperature heat pump according to the temperature of the produced hot water, wherein the temperature of the hot water produced by the low-temperature heat pump is about 46 ℃, the temperature of the hot water produced by the medium-temperature heat pump is about 65 ℃, and the temperature of the hot water produced by the high-temperature heat pump is about 85 ℃. Therefore, in the case of the lithium bromide absorption heat pump, the temperature of hot water produced by the lithium bromide absorption heat pump is greatly limited by the grade of a low-temperature waste heat source, and when the grade of low-temperature waste heat is lower and the grade of heat demand of a heat user is higher, the actual demand of the site is hardly met; in terms of the centrifugal heat pump, the matching of the hot water making temperature and the heat grade required by a heat user can be realized by adopting a mode of increasing the number of blade stages or increasing the number of compressors connected in series, but on one hand, the structural complexity and the equipment investment of the equipment are increased, and on the other hand, the electric energy cost consumed by driving is also increased, the overall economy is obviously reduced, and the centrifugal heat pump has a certain limitation in adapting to the energy requirements of different users as a whole.
Disclosure of Invention
The purpose of the utility model is that: the utility model provides a combined heat pump system, based on the optimization configuration of energy, the advantage and the characteristics of centrifugal heat pump have been fused to the absorption heat pump, steam compressor has been introduced between generator and condenser, compress the steam from the generator, after making its temperature and pressure rise to the parameter that satisfies the heat user demand continually, discharge to the condenser through the steam compressor export, accomplish the preparation of hot water that the heat user needs in the condenser, high temperature high pressure steam is exothermic cooling in the condenser and is the medium pressure liquid medium after, enter the evaporimeter through the ejector, simultaneously medium pressure liquid medium is the self-circulation process of the refrigerant in the drive evaporimeter as the working medium of ejector, thereby realize recycling the medium pressure differential energy between condenser and the evaporimeter, accomplish the substitution to the refrigerant pump in the conventional absorption heat pump, equipment initial investment and operation power consumption have been saved. By utilizing the composite heat pump system, the optimal design of heat pump equipment can be carried out according to the existing energy characteristics and the use cost of heat users in different areas, so that the economic benefit and the environmental benefit of a heat utilization terminal are realized to the greatest extent.
In order to achieve the technical purpose, the technical scheme adopted by the novel device is as follows:
a compound heat pump system comprises a compressor, a generator, an absorber, an evaporator, a condenser, an ejector, a solution heat exchanger, a solution pump and a pipeline system:
an external driving heat source is arranged outside the generator; the steam outlet of the generator is communicated with the inlet of the steam compressor through a pipeline, the outlet of the steam compressor is communicated with the steam inlet of the condenser through a pipeline, the refrigerant outlet of the condenser is communicated with the injection medium inlet of the ejector through a pipeline, the outlet of the ejector is communicated with the spraying pipe in the evaporator through a pipeline, the liquid refrigerant outlet of the evaporator is communicated with the injection medium inlet of the ejector through a pipeline, the steam outlet of the evaporator is communicated with the steam inlet of the absorber through a liquid blocking device, the solution outlet of the absorber is communicated with the inlet of the solution pump through a pipeline, the outlet of the solution pump is communicated with the dilute solution inlet of the solution heat exchanger through a pipeline, the dilute solution outlet of the solution heat exchanger is communicated with the spraying pipe of the generator through a pipeline, the concentrated solution outlet of the generator is communicated with the concentrated solution inlet of the solution heat exchanger through a pipeline, and the concentrated solution outlet of the solution heat exchanger is communicated with the spraying pipe of the absorber through a pipeline.
Further, the compressor is a vapor compressor.
Further, the liquid blocking device is a liquid blocking plate and is used for allowing low-temperature refrigerant steam in the evaporator to pass through.
Further, a driving heat source inlet and a driving heat source outlet are arranged on the generator; the external driving heat source heat extraction port is communicated with the driving heat source inlet of the generator through a pipeline, and the driving heat source outlet of the generator is communicated with the external driving heat source heat regeneration port through a pipeline;
the low-temperature hot water inlet of the absorber is communicated with the water outlet of the heat utilization terminal through a pipeline, the hot water outlet of the absorber is communicated with the hot water inlet of the condenser through a pipeline, and the high-temperature hot water outlet of the condenser is communicated with the water inlet of the heat utilization terminal through a pipeline; the low-temperature heat source inlet of the evaporator is communicated with the external low-temperature waste heat taking port through a pipeline, and the low-temperature heat source outlet of the evaporator is communicated with the external low-temperature waste heat discharging port through a pipeline.
Further, a demisting device is arranged at the steam outlet of the generator to prevent liquid refrigerant from entering the steam compressor.
Further, an automatic pressure regulating device is arranged at the outlet of the ejector to ensure the required operating pressure of the condenser and the evaporator.
Further, an automatic vacuumizing device is arranged in the absorber, so that the vacuum degree required by normal operation of the device is ensured.
Further, the generator, the condenser, the evaporator and the absorber all adopt shell-and-tube heat exchangers.
The utility model adopting the technical scheme has the following advantages:
1. compared with the conventional absorption heat pump, the driving energy grade of the generator of the composite heat pump system can be lower, and the application range of the heat pump is remarkably improved.
2. Compared with the conventional absorption heat pump, the composite heat pump system can utilize lower-grade waste heat to prepare higher-grade hot water.
3. Compared with a conventional compression heat pump, the composite heat pump system can fully utilize medium and low temperature waste heat resources, reduce the configuration requirement of a compressor and save the power consumption of a device.
4. The pressure difference energy between the condenser and the evaporator is recycled through the ejector, a refrigerant pump is replaced, and the equipment cost and the running power consumption are reduced.
Drawings
The utility model can be further illustrated by means of non-limiting examples given in the accompanying drawings;
fig. 1 is a schematic structural diagram of a composite heat pump system according to the present utility model.
The main reference numerals are as follows:
a vapor compressor 1; a generator 2; driving the heat source inlet 3; driving the heat source outlet 4; an absorber 5; a solution pump 6; a low temperature hot water inlet 7; an ejector 8; an evaporator 9; a low temperature heat source inlet 10; a low temperature heat source outlet 11; a high-temperature hot water outlet 12; a condenser 13; a solution heat exchanger 14.
Detailed Description
The present utility model will be described in detail below with reference to the drawings and the specific embodiments, wherein like or similar parts are designated by the same reference numerals throughout the drawings or the description, and implementations not shown or described in the drawings are in a form well known to those of ordinary skill in the art. In addition, directional terms such as "upper", "lower", "top", "bottom", "left", "right", "front", "rear", etc. in the embodiments are merely directions with reference to the drawings, and are not intended to limit the scope of the present utility model.
As shown in fig. 1, a composite heat pump system includes a vapor compressor 1, a generator 2, an absorber 5, an evaporator 9, a condenser 13, an ejector 8, a solution heat exchanger 14, a solution pump 6, and a pipe system: in the present embodiment, it is preferable to use the vapor compressor 1, and the vapor compressor 1 has high compression efficiency and energy conversion efficiency. By compressing the vapor, its temperature and pressure can be increased, thereby transferring heat more efficiently.
An external driving heat source is arranged outside the generator 2; in some embodiments, the externally driven heat source may be a burner, solar energy, industrial waste heat, or other device or structure capable of providing a source of heat to the generator 2, which may vary depending on the particular design and application scenario. The steam outlet of the generator 2 is communicated with the inlet of the steam compressor 1 through a pipeline, the outlet of the steam compressor 1 is communicated with the steam inlet of the condenser 13 through a pipeline, the refrigerant outlet of the condenser 13 is communicated with the injection medium inlet of the ejector 8 through a pipeline, the outlet of the ejector 8 is communicated with the spray pipe in the evaporator 9 through a pipeline, the liquid refrigerant outlet of the evaporator 9 is communicated with the injected medium inlet of the ejector 8 through a pipeline, and the ejector 8 recycles the pressure difference energy between the condenser 13 and the evaporator 9. Specifically, the arrangement utilizes the energy difference in the system to eject the refrigerant at the high pressure side to the low pressure side so as to push the refrigerant to flow. Therefore, the ejector fully utilizes the energy of the system, replaces a refrigerant pump, reduces the energy consumption and the complexity of the system, and reduces the equipment cost and the operation power consumption. The steam outlet of the evaporator 9 is communicated with the steam inlet of the absorber 5 through a liquid blocking device, the solution outlet of the absorber 5 is communicated with the inlet of the solution pump 6 through a pipeline, the outlet of the solution pump 6 is communicated with the dilute solution inlet of the solution heat exchanger 14 through a pipeline, the dilute solution outlet of the solution heat exchanger 14 is communicated with the spray pipe of the generator 2 through a pipeline, the concentrated solution outlet of the generator 2 is communicated with the concentrated solution inlet of the solution heat exchanger 14 through a pipeline, and the concentrated solution outlet of the solution heat exchanger 14 is communicated with the spray pipe of the absorber 5 through a pipeline.
In use, the generator 2 receives a heat source and produces steam by heating the solution to evaporate the working medium (typically water and solution) therein. Steam flows out of the generator 2 and is connected to the inlet of the vapor compressor 1 through a pipe. The vapor compressor 1 compresses vapor to raise its temperature and pressure. The steam compressed by the vapor compressor 1 enters the steam inlet of the condenser 13 through a pipeline. In the condenser 13, the steam releases heat, cools and condenses into a liquid refrigerant. The refrigerant in the condenser 13 is connected with an injection medium inlet of the injector 8 through a pipeline. The ejector 8 utilizes the kinetic energy of high-speed liquid flow to eject the refrigerant at the bottom of the evaporator 9 into the spray pipe at the upper part of the evaporator 9. The spray pipe in the evaporator 9 is connected with the outlet of the ejector 8 through a pipeline. The injected refrigerant is sprayed from the spray pipe to form tiny liquid drops, the liquid drops are sprayed on the outer wall of the heat exchange pipe in the evaporator 9, the liquid passes through the pipe wall and the low-temperature waste heat medium in the heat exchange pipe to complete the heat exchange process, and the liquid drops of the refrigerant are evaporated into steam. The vapor formed in the evaporator 9 is connected to the vapor inlet of the absorber 5 by a liquid blocking device. The concentrated solution from the solution heat exchanger 14 is sprayed out through a spray pipe of the absorber 5, fine mist droplets are formed in the absorber 5, the steam from the evaporator 9 is contacted with the mist liquid in the absorber 5 and is integrated, the concentrated solution is changed into a dilute solution to be collected at the lower part of the absorber 5, and in the process, the steam is condensed and changed into a liquid medium and the vaporization latent heat is released. The dilute solution in the absorber 5 is connected via a line to the inlet of a solution pump 6. The solution pump 6 pumps the dilute solution from the absorber 5 into the dilute solution inlet of the solution heat exchanger 14. The dilute solution outlet of the solution heat exchanger 14 is connected with a spray pipe in the generator 2 through a pipeline, the dilute solution is sprayed out of the spray pipe to form mist droplets in the generator 2, the mist droplets are sprayed on the outer wall of a heat exchange pipe of the generator 2 and are subjected to heat exchange with a driving heat source in the heat exchange pipe, part of refrigerant in the droplets absorbs heat and evaporates to become steam, and the steam enters an inlet of the steam compressor 1 through the pipeline to start the next circulation process. The unevaporated solution is changed into concentrated solution which is collected at the bottom of the generator 2, the concentrated solution enters the concentrated solution inlet of the solution heat exchanger 14 from the concentrated solution outlet of the generator 2 through a pipeline, and the concentrated solution outlet of the solution heat exchanger 14 is connected with the spray pipe of the absorber 5 through a pipeline. And the process of recycling a part of low-temperature heat from the low-temperature waste heat source is realized by inputting electric energy required by the part driving the heat source and the small amount of steam compressor, so that a large amount of medium-temperature heat energy required by the heat utilization terminal is generated.
Lithium bromide absorption heat pumps and centrifugal heat pumps are mainly used in the prior art. The lithium bromide absorption heat pump generally takes fuel gas, steam, high-temperature hot water or flue gas as driving energy, recovers waste heat in low-temperature waste heat of 20-40 ℃, and prepares hot water with the temperature about 40 ℃ higher than that of a low-temperature heat source and the highest hot water temperature of about 85 ℃ for a heat user, so that the energy utilization target with the heating coefficient of about 1.7-2.3 is realized. The centrifugal heat pump takes electric energy as energy to drive a compressor to do work, waste heat in low-temperature waste heat at 20-40 ℃ is recovered, hot water at 85 ℃ is produced at the highest temperature to be supplied to heat users, and the energy utilization target with the heating coefficient of 3-6 is realized; meanwhile, centrifugal heat pumps are classified into a low-temperature heat pump, a medium-temperature heat pump and a high-temperature heat pump according to the temperature of the produced hot water, wherein the temperature of the hot water produced by the low-temperature heat pump is about 46 ℃, the temperature of the hot water produced by the medium-temperature heat pump is about 65 ℃, and the temperature of the hot water produced by the high-temperature heat pump is about 85 ℃. Therefore, in the case of the lithium bromide absorption heat pump, the temperature of hot water produced by the lithium bromide absorption heat pump is greatly limited by the grade of a low-temperature waste heat source, and when the grade of low-temperature waste heat is lower and the grade of heat demand of a heat user is higher, the actual demand of the site is hardly met; in terms of the centrifugal heat pump, the matching of the hot water making temperature and the heat grade required by a heat user can be realized by adopting a mode of increasing the number of blade stages or increasing the number of compressors connected in series, but on one hand, the structural complexity and the equipment investment of the equipment are increased, and on the other hand, the electric energy cost consumed by driving is also increased, the overall economy is obviously reduced, and the centrifugal heat pump has a certain limitation in adapting to the energy requirements of different users as a whole.
Compared with the prior art, the composite heat pump system realizes heat transfer and conversion in a circulating mode, and fully utilizes heat exchange among all components, so that the grade requirement on a driving heat source is reduced, and the temperature level of hot water is improved. The system can utilize renewable energy sources as heat sources, such as solar energy, waste heat and the like, reduces the dependence on traditional energy sources, and is beneficial to environmental protection and sustainable development. Because of the use of the composite structure, the system has higher flexibility and can adapt to different working conditions and requirements. The system can provide refrigeration and heating functions simultaneously, has strong comprehensive capacity, and can meet heat regulation requirements in different seasons and different environments. Through the circulation and heat exchange modes, the system can effectively save energy cost and reduce energy consumption and operation cost.
In some embodiments, the liquid blocking device is a liquid blocking plate, and is used for passing the low-temperature refrigerant vapor in the evaporator 9. In the embodiment, the liquid baffle is in a flat plate shape and is made of a corrosion-resistant and high-temperature-resistant material, such as stainless steel or copper alloy; at the same time, the material has good heat conducting property so as to transfer heat more effectively. Preferably, the liquid baffle is placed in parallel with the tubes in the evaporator 9 to prevent the passage of liquid refrigerant.
In some embodiments, the generator 2 is provided with a driving heat source inlet 3 and a driving heat source outlet 4; the external driving heat source heat-taking port is communicated with the driving heat source inlet 3 of the generator 2 through a pipeline, and the driving heat source outlet 4 of the generator 2 is communicated with the external driving heat source heat-regenerating port through a pipeline;
the low-temperature hot water inlet 7 of the absorber 5 is communicated with the water outlet of the heat utilization terminal through a pipeline, the hot water outlet of the absorber 5 is communicated with the hot water inlet of the condenser 13 through a pipeline, and the high-temperature hot water outlet 12 of the condenser 13 is communicated with the water inlet of the heat utilization terminal through a pipeline; the low-temperature heat source inlet 10 of the evaporator 9 is communicated with an external low-temperature waste heat taking port through a pipeline, and the low-temperature heat source outlet 11 of the evaporator 9 is communicated with an external low-temperature waste heat discharging port through a pipeline.
In this embodiment, the external driving heat source may be other heat source devices or systems, such as a boiler, a waste heat recovery system, and the like. By connecting an external driving heat source to the generator 2, the system can utilize an external high temperature heat source to drive the operation of the heat pump system. Therefore, the overall energy efficiency of the system can be improved, and the requirements for other forms of energy sources such as electric power and the like are reduced. A hot water flow path is arranged between the absorber 5 and the condenser 13, so that the hot water absorbs heat and heats up in a grading and subsection way in the absorber 5 and the condenser 13 in sequence, and the effect of cascade utilization of energy is achieved. The high-temperature hot water outlet 12 of the condenser 13 may be connected to a water inlet of a heat-use terminal, to supply high-temperature hot water to a demand of the heat-use terminal, such as a heating system, a water heater, etc.
In some embodiments, a demisting device is arranged at the steam outlet of the generator 2, and in this embodiment, the demisting device should be connected with a pipeline of the system; the connection mode comprises welding, threaded connection or flanges; thus, the liquid refrigerant can be effectively prevented from entering the vapor compressor 1, and the normal operation of the compressor is protected. Liquid refrigerant entering the compressor can cause liquid hammer, damage to compressor components and even system failure. By using demisting means, droplets can be separated from the vapor and deposited or removed, ensuring that only pure vapor in the vapor enters the compressor. This helps to improve the reliability and durability of the system.
In some embodiments, automatic pressure regulating means are provided at the outlet of the ejector 8 to ensure the required operating pressure of the condenser 13 and evaporator 9. The automatic pressure regulating device comprises a pressure control valve, an electronic diaphragm pressure regulator, a pressure regulator and the like. These means are able to sense the pressure variations of the system and automatically adjust the valves or control elements to maintain the desired operating pressure of the condenser 13 and evaporator 9.
The function of the automatic pressure regulating device is to keep the condenser 13 and the evaporator 9 operating within the desired operating pressure range. By monitoring the pressure change of the system and automatically adjusting the valves or control elements, the automatic pressure regulating device can ensure the normal operation of the condenser 13 and the evaporator 9 and provide a stable working pressure. This helps to optimize the heat transfer efficiency of the system and ensures stability and reliability of the system under different load conditions.
In some embodiments, an automatic vacuum-pumping device is disposed in the absorber 5, where the automatic vacuum-pumping device includes a vacuum pump, a molecular pump, a turbo molecular pump, and the like, and an appropriate device can be selected according to the requirements and performance requirements of the system to ensure the vacuum degree required by the normal operation of the device. The provision of an automatic vacuum-pumping device ensures that the required vacuum level is maintained inside the absorber 5. By withdrawing the gas from the absorber 5, the device can create a vacuum environment that facilitates the absorption process and proper operation of the heat pump system. Maintaining a proper vacuum level can improve absorption efficiency and performance and reduce the presence of unnecessary gases and impurities in the system. This helps to ensure the stability, reliability and long-term operation of the system.
In some embodiments, the generator 2, condenser 13, evaporator 9 and absorber 5 all employ shell-and-tube heat exchangers. The outside of the heat exchange tube flows with the circulating working medium (refrigerant, concentrated solution and dilute solution) in the heat pump, and the inside of the heat exchange tube flows with the external process medium (waste heat, hot water and the like). Because of the compact structure of the shell-and-tube heat exchanger, a larger heat exchange surface area is provided, thereby promoting efficient heat transfer. The internal circulation working medium (refrigerant, solution, etc.) flows outside the tube, while the external process medium (waste heat, hot water, etc.) flows inside the tube, and heat exchange is realized through heat conduction between the shell side and the tube side. This design allows for efficient transfer of heat from the heat source to or from the working medium, improving the thermal efficiency of the system. On the other hand, the internal structure of the shell-and-tube heat exchanger generally adopts a multi-tube bundle arrangement, and the heat exchange effect can be enhanced by increasing the number of tube bundles and changing the fluid flow mode. For example, the heat transfer efficiency between the heat medium and the medium can be improved and the heat exchange amount can be increased by adopting a multi-channel or multi-stage heat exchanger design.
During operation, dilute solution sprayed by the spraying pipe of the generator 2 is scattered on the outer wall of the heat exchange pipe to exchange heat with a high-temperature heat source medium in the heat exchange pipe, the high-temperature heat source releases heat and is discharged to the heat recovery port through the pipeline, after the dilute solution absorbs heat and heats up, part of refrigerant is evaporated to become medium-temperature refrigerant steam, the unvaporized solution becomes concentrated solution, the concentrated solution is discharged to the solution heat exchanger 14 through the solution outlet of the generator 2, the medium-temperature refrigerant steam enters the steam type compressor 1 through the pipeline, the medium-temperature refrigerant steam performs compression work, the medium-temperature refrigerant steam heats up and is boosted to become high-temperature high-pressure refrigerant steam, the high-temperature high-pressure refrigerant steam flows outside the heat exchange pipe through the pipeline and enters the condenser 13 through the outlet of the steam type compressor 1, the medium-temperature hot water from the absorber 5 is in the pipeline, the high-temperature high-pressure refrigerant steam exchanges heat with the medium-temperature hot water in the pipe through the pipeline, the medium-temperature hot water absorbs heat and heats up, then carries out heat supply through a pipeline to a terminal heat user through a high-temperature hot water outlet 12 of a condenser 13, the high-temperature high-pressure refrigerant steam releases heat and then lowers the temperature and the pressure to be medium-pressure liquid refrigerant, the medium-pressure liquid refrigerant enters an ejector 8 through the pipeline and is used as an ejection medium of the ejector 8, the liquid refrigerant in the evaporator 9 is mixed with the ejection medium as an ejection medium and then enters a spray pipe of the evaporator 9 through the pipeline, the liquid refrigerant is sprayed to the outer surface of a heat exchange pipe through the spray pipe and carries out heat exchange with a low-temperature heat source in the heat exchange pipe, part of the liquid refrigerant absorbs heat and evaporates to be low-temperature refrigerant steam, the non-evaporated refrigerant is collected at the bottom of the evaporator 9 and is used as a concentrated solution sprayed by the ejector 8 through a liquid baffle plate and the spray pipe of the absorber 5, the refrigerant steam becomes liquid and releases vaporization latent heat in the solution, the concentrated solution absorbs refrigerant steam and becomes a dilute solution, the concentrated solution is sprayed on the outer wall of a heat exchange tube while being mixed, and exchanges heat with low-temperature hot water from a terminal heat user in the heat exchange tube, the low-temperature hot water absorbs heat and rises temperature to be medium-temperature hot water, the medium-temperature hot water enters a condenser 13 through a pipeline, the dilute solution after heat release and temperature reduction enters a solution pump 6 through the pipeline, and enters a solution heat exchanger 14 through the pipeline under the driving action of the solution pump 6, the low-temperature dilute solution and the high-temperature concentrated solution from a generator 2 finish heat exchange in the solution heat exchanger 14, the high-temperature concentrated solution enters a spray tube of an absorber 5 through the pipeline after heat release and temperature reduction, the low-temperature dilute solution absorbs heat and rises temperature, and then enters the spray tube of the generator 2 through the pipeline, and the next circulation heat exchange process is started.
The above describes in detail a composite heat pump system provided by the utility model. The description of the specific embodiments is only intended to aid in understanding the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (8)
1. The utility model provides a combined type heat pump system, includes compressor, generator, absorber, evaporimeter, condenser, ejector, solution heat exchanger, solution pump and pipe-line system, its characterized in that:
an external driving heat source is arranged outside the generator; the steam outlet of the generator is communicated with the inlet of the steam compressor through a pipeline, the outlet of the steam compressor is communicated with the steam inlet of the condenser through a pipeline, the refrigerant outlet of the condenser is communicated with the injection medium inlet of the ejector through a pipeline, the outlet of the ejector is communicated with the spraying pipe in the evaporator through a pipeline, the liquid refrigerant outlet of the evaporator is communicated with the injection medium inlet of the ejector through a pipeline, the steam outlet of the evaporator is communicated with the steam inlet of the absorber through a liquid blocking device, the solution outlet of the absorber is communicated with the inlet of the solution pump through a pipeline, the outlet of the solution pump is communicated with the dilute solution inlet of the solution heat exchanger through a pipeline, the dilute solution outlet of the solution heat exchanger is communicated with the spraying pipe of the generator through a pipeline, the concentrated solution outlet of the generator is communicated with the concentrated solution inlet of the solution heat exchanger through a pipeline, and the concentrated solution outlet of the solution heat exchanger is communicated with the spraying pipe of the absorber through a pipeline.
2. A composite heat pump system according to claim 1, wherein:
the compressor is a vapor compressor.
3. A composite heat pump system according to claim 2, wherein:
the liquid blocking device is a liquid blocking plate and is used for allowing low-temperature refrigerant steam in the evaporator to pass through.
4. A composite heat pump system according to claim 3, wherein:
the generator is provided with a driving heat source inlet and a driving heat source outlet; the external driving heat source heat extraction port is communicated with the driving heat source inlet of the generator through a pipeline, and the driving heat source outlet of the generator is communicated with the external driving heat source heat regeneration port through a pipeline;
the low-temperature hot water inlet of the absorber is communicated with the water outlet of the heat utilization terminal through a pipeline, the hot water outlet of the absorber is communicated with the hot water inlet of the condenser through a pipeline, and the high-temperature hot water outlet of the condenser is communicated with the water inlet of the heat utilization terminal through a pipeline; the low-temperature heat source inlet of the evaporator is communicated with the external low-temperature waste heat taking port through a pipeline, and the low-temperature heat source outlet of the evaporator is communicated with the external low-temperature waste heat discharging port through a pipeline.
5. A composite heat pump system according to claim 4, wherein:
the steam outlet of the generator is provided with a demisting device for preventing liquid refrigerant from entering the steam compressor.
6. A composite heat pump system according to claim 5, wherein:
an automatic pressure regulating device is arranged at the outlet of the ejector to ensure the required operating pressure of the condenser and the evaporator.
7. A composite heat pump system according to claim 6, wherein:
an automatic vacuumizing device is arranged in the absorber, so that the vacuum degree required by normal operation of the device is ensured.
8. A composite heat pump system according to claim 7, wherein:
the generator, the condenser, the evaporator and the absorber all adopt shell-and-tube heat exchangers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321466882.1U CN220397891U (en) | 2023-06-09 | 2023-06-09 | Combined heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321466882.1U CN220397891U (en) | 2023-06-09 | 2023-06-09 | Combined heat pump system |
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| CN220397891U true CN220397891U (en) | 2024-01-26 |
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| CN202321466882.1U Active CN220397891U (en) | 2023-06-09 | 2023-06-09 | Combined heat pump system |
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