CN107388620B - Composite solar lithium bromide absorption type air conditioning system - Google Patents
Composite solar lithium bromide absorption type air conditioning system Download PDFInfo
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- CN107388620B CN107388620B CN201710853939.6A CN201710853939A CN107388620B CN 107388620 B CN107388620 B CN 107388620B CN 201710853939 A CN201710853939 A CN 201710853939A CN 107388620 B CN107388620 B CN 107388620B
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/007—Machines, plants or systems, using particular sources of energy using solar energy in sorption type systems
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a composite solar lithium bromide absorption air conditioning system, which comprises a solar heat collector, a heat pump system, a generator and a heat storage water tank, wherein a hot water loop is formed by the solar heat collector, the heat pump system, the generator and the heat storage water tank; a solution loop is formed by an absorber, a dilute solution storage tank, a solution pump, a solution heat exchanger, a generator and a concentrated solution storage tank; a cooling water loop is formed by a cooling tower, a cooling water pump, an absorber and a condenser; the evaporator, the chilled water pump and the air handling unit form a chilled water loop; the evaporator, absorber, dilute solution storage tank, solution pump, solution heat exchanger, generator, condenser, refrigerant storage tank and throttle valve form a refrigerant loop; and a plurality of valves are arranged among the plurality of loops. The composite solar lithium bromide absorption air conditioning system provided by the invention organically combines the heat pump energy-saving technology and the solar photo-thermal technology, can reduce the instability of single energy supply, and can realize the functions of refrigeration, heating and hot water supply.
Description
Technical Field
The invention relates to a composite solar lithium bromide absorption type air conditioning system, and belongs to the technical field of photovoltaics.
Background
Nowadays, energy conservation and environmental protection are advocated, and absorption type air conditioning systems driven by solar light and heat are more and more concerned by people. However, the performance of the conventional solar absorption air conditioning system is greatly influenced by the climate environment, so that the application of the conventional solar absorption air conditioning system is limited. The main performance is as follows: when sufficient solar radiation is not available at night and in rainy days, the normal operation of the unit cannot be realized. And in addition, the auxiliary heating mode consumes other energy sources, so that the aim of environmental protection cannot be fulfilled. Meanwhile, the conventional solar absorption air conditioning unit also has the problems of long unit starting time, large volume of an energy storage water tank and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a composite solar lithium bromide absorption air conditioning system which can combine a solar photo-thermal technology and a heat pump technology, and has the advantages of reasonable structure, short starting time and small volume of an energy storage device.
A composite solar energy lithium bromide absorption air conditioning system comprises a solar heat collector, a heat pump system, a heat storage water tank, a starting water tank, an absorber, a generator, a concentrated solution storage tank, a dilute solution storage tank, a solution heat exchanger, an evaporator, a condenser, a refrigerant storage tank, a cooling tower and an air handling unit, wherein,
the output end of the solar thermal collector is connected with one end of a heat pump system through a first one-way electromagnetic valve, the other end of the heat pump system is connected with a first input end of a first three-way electromagnetic valve, the output end of the first three-way valve is connected with one end of a generator, the other end of the generator is respectively connected with a first input end of a second three-way electromagnetic valve and an input end of a seventh one-way electromagnetic valve, the output end of the second three-way electromagnetic valve is connected with a water inlet of a thermal storage water tank, a water outlet of the thermal storage water tank is connected with the input end of the solar thermal collector through a hot water pump to form a hot water circulation loop, the output end of the seventh one-way electromagnetic valve is connected with a water inlet of a starting water tank, a water outlet of the starting water tank is connected with the hot water pump, the input end of the second one-way electromagnetic valve is connected with the output end of the solar heat collector;
the generator, the condenser, the refrigerant storage tank, the throttle valve, the evaporator, the absorber, the fifth one-way solenoid valve, the dilute solution storage tank, the solution pump and the solution heat exchanger are sequentially connected through pipelines to form a refrigerant loop, one end of the concentrated solution storage tank is connected with the solution heat exchanger, the other end of the concentrated solution storage tank is connected with the absorber through the sixth one-way solenoid valve, and the concentrated solution storage tank and the dilute solution storage tank form a parallel structure;
cooling water in the cooling tower flows through the absorber and the condenser in sequence through the cooling water pump and flows into the cooling tower through the third one-way electromagnetic valve to form a cooling water loop;
and air conditioner cold water in the air handling unit flows through the evaporator through a pipeline and flows back to the air handling unit through a fourth one-way electromagnetic valve to form an air conditioner cold water loop.
Preferably, the heat storage water tank and the starting water tank both adopt a temperature layered structure.
Preferably, the refrigerant in the refrigerant storage tank is water, and the solution in the concentrated solution storage tank and the dilute solution storage tank is a lithium bromide solution.
Has the advantages that: compared with the prior art, the composite solar lithium bromide absorption type air conditioning system provided by the invention combines a conventional solar lithium bromide absorption type air conditioning system and a heat pump energy-saving system, reduces the instability of single energy supply, and can realize the functions of refrigeration, heating and hot water supply. The system changes the original water energy storage into the energy storage mode combining water energy storage and solution potential energy storage, and the volume of the latent heat energy storage device is 1/5 of the volume of the traditional water energy storage device, so that the volume of the energy storage device can be greatly reduced. Meanwhile, a starting water tank with the volume less than half of that of the heat storage water tank is added, and the quick starting of the absorption type unit is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-solar heat collector, 2-heat pump system, 3-generator, 4-condenser, 5-refrigerant storage tank, 6-evaporator, 7-cooling tower, 8-cooling water pump, 9-freezing water pump, 10-air handling unit, 11-absorber, 12-dilute solution storage tank, 13-solution pump, 14-solution heat exchanger, 15-concentrated solution storage tank, 16-heat storage water tank, 17-starting water tank, 18-hot water pump, F1-first one-way solenoid valve, F2-second one-way solenoid valve, F3-first three-way solenoid valve, F4-third one-way solenoid valve, F5-throttle valve, F6-fourth one-way solenoid valve, F7-fifth one-way solenoid valve, F8-sixth one-way solenoid valve, F9-second three-way solenoid valve, F10-seventh one-way solenoid valve.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
A composite solar energy lithium bromide absorption air conditioning system comprises a solar heat collector 1, a heat pump system 2, a heat storage water tank 16, a starting water tank 17, an absorber 11, a generator 3, a concentrated solution storage tank 14, a dilute solution storage tank 12, a solution heat exchanger 14, an evaporator 6, a condenser 4, a refrigerant storage tank 5, a cooling tower 7 and an air handling unit 10, wherein,
the output end of the solar thermal collector 1 is connected with one end of a heat pump system 2 through a first one-way electromagnetic valve F1, the other end of the heat pump system 2 is connected with a first input end of a first three-way electromagnetic valve F3, the output end of a first three-way electromagnetic valve F3 is connected with one end of a generator 3, the other end of the generator 3 is respectively connected with a first input end of a second three-way electromagnetic valve F9 and an input end of a seventh one-way electromagnetic valve F10, the output end of the second three-way electromagnetic valve F9 is connected with a water inlet of a thermal storage water tank 16, a water outlet of the thermal storage water tank 16 is connected with the input end of the solar thermal collector 1 through a hot water pump 18 to form a hot water circulation loop, the output end of the seventh one-way electromagnetic valve F7 is connected with a water inlet of a starting water tank 17, a water outlet of the starting water tank 17 is connected with the hot water pump 18 and connected with the thermal storage water The input end of the second one-way electromagnetic valve F2 is connected with the output end of the solar heat collector 1;
the generator 3, the condenser 4, the refrigerant storage tank 5, the throttle valve F5, the evaporator 6, the absorber 11, the fifth one-way solenoid valve F7, the dilute solution storage tank 12, the solution pump 13 and the solution heat exchanger 14 are sequentially connected through pipelines to form a refrigerant loop, one end of the concentrated solution storage tank 15 is connected with the solution heat exchanger 14, the other end of the concentrated solution storage tank is connected with the absorber 11 through the sixth one-way solenoid valve F8, and the concentrated solution storage tank and the dilute solution storage tank 12 form a parallel structure;
cooling water in the cooling tower 7 flows through the absorber 11 and the condenser 4 in sequence through the cooling water pump 8, and flows into the cooling tower 7 through the third one-way electromagnetic valve F4 to form a cooling water loop;
the air-conditioning cold water in the air handling unit 10 flows through the evaporator 6 through a pipeline and flows back to the air handling unit 10 through the fourth one-way solenoid valve F6, so that an air-conditioning cold water loop is formed.
Preferably, the hot water storage tank 16 and the starting water tank 17 are in a temperature layered structure.
Preferably, the refrigerant in the refrigerant storage tank 5 is water, and the solutions in the concentrated solution storage tank 15 and the dilute solution storage tank 12 are lithium bromide solutions.
The specific working principle of the invention is as follows:
1. and (3) quick start: the starting condition of the system is that the temperature of the hot water outlet of the solar heat collector 1 reaches the lowest starting temperature of the refrigerator, so that a starting water tank with the volume being only half of that of the heat storage water tank is added for realizing quick starting. The starting circulating system consists of a solar heat collector, a generator, a starting water tank and a hot water pump.
When the cycle is started, the seventh one-way electromagnetic valve F10 is communicated with the generator 3, the second one-way electromagnetic valve F2 is opened, the first three-way electromagnetic valve F3 is not communicated with the heat pump system, the hot water pump 18 transmits water in the starting water tank 17 to the solar heat collector 1, then the water absorbs light and heat to be heated, then the water flows into the generator 3, and when the water temperature reaches the starting temperature of the absorption type unit, the generator 3 works. In this state, F1 is closed, F3 communicates F2 with generator 3, F9 is closed, F10 communicates generator 3 with starting water tank 17, and F9 is opened to communicate generator 3 with hot water storage tank 16 and F10 is closed after the unit completes the starting operation for a certain period of time.
When the hot water temperature is difficult to reach the starting temperature, the first three-way electromagnetic valve F3 is opened to communicate the heat pump system 2 and the generator 3, the one-way electromagnetic valve F1 is opened, and in this state, F9 is closed, and F10 is opened to communicate the generator 3 and the starting water tank 17.
2. Latent heat energy storage of solution: when the temperature of the hot water outlet of the solar heat collector 1 reaches the lowest temperature required by the starting of the refrigerator, the dilute solution in the dilute solution storage tank 12 is pumped into the generator 3 through the solution heat exchanger 14 by the solution pump 13, the dilute solution is heated by hot water to generate gas-liquid separation, the concentrated solution with separated water vapor flows into the concentrated solution storage tank 15, the water vapor flows into the condenser 4 to be condensed, the condensed water is changed into liquid water, and the liquid water flows into the refrigerant storage tank 5, so that the energy storage process of converting solar energy into solution potential energy is realized.
3. Refrigerating in summer: when the room needs to be cooled, according to the size of the load, water in the refrigerant storage tank 5 enters the evaporator 6 to be evaporated and absorb heat, so that the chilled water of the air conditioner is cooled, the cooled chilled water is input into the air handling unit 10 through the chilled water pump 9, the temperature of the air supplied into the room is adjusted, and the room is cooled. Meanwhile, the heated refrigerant water is absorbed by the concentrated solution in the absorber 11 to form a dilute solution, the dilute solution enters the dilute solution storage tank 12, the dilute solution is pumped into the generator 3 through the solution heat exchanger 14 by the solution pump 13 to generate gas-liquid separation, the concentrated solution flows back to the absorber 11 through the concentrated solution storage tank 15, and the water vapor flows back to the refrigerant storage tank 5 after being condensed and cooled. And realizing refrigeration circulation.
4. Balance of cooling load and solar supply: at the same time, the cooling capacity obtained by the conversion of the solar energy heat collected by the solar heat collector 1 through the absorption unit may not be consistent with the room load. When the solution flow through the generator 3 is greater than the solution flow of the absorber, the excess concentrated solution is stored in the concentrated solution reservoir 15. Otherwise, the rich solution tank 15 is used to replenish the deficient portion. In this way the system balances the difference in cooling load and solar supply.
5. Cooling in summer at night: the cooling of the room is completely converted by the solution potential stored in the concentrated solution tank. The concentrated solution is released from the concentrated solution storage tank 15 to the absorber 11, the water vapor volatilized from the evaporator is absorbed for refrigeration (the refrigerant water in the evaporator is provided by the refrigerant storage tank 5), and the absorbed dilute solution enters the dilute solution storage tank 12 for storage.
6. Heating in winter: in the daytime, water with lower temperature in the heat storage water tank is heated by the solar heat collector 1, and when the temperature is higher than a certain value, the heat pump system 2 is started to enable the generator 3 and the condenser 4 of the system to start working. The generated concentrated solution is stored in a concentrated solution storage tank 15, the condensation heat is used as heat supply for rooms, and other components, namely the refrigerant storage tank 5, the evaporator 6, the cooling tower 7, the air treatment unit 10, the absorber 11 and the like do not work at the moment; at night, the heat supply of the room is firstly supplied by the heat storage water tank 16, and when the temperature of the hot water in the water tank is lower than the designed value, the heat pump system 2 is started to improve the temperature of the hot water.
7. Hot water supply in spring and autumn: mainly comprises a solar heat collector, a heat storage water tank and a hot water pump. When the solar radiation is poor, the heat pump system can be started, and F9 is communicated with F2.
The heat exchanger is used for improving the efficiency of the lithium bromide refrigerating unit, the temperature of the dilute solution from the dilute solution storage tank is low, the dilute solution needs to be heated to raise the temperature in order to be subjected to gas-liquid separation in the generator and converted into the concentrated solution, and meanwhile, the temperature of the concentrated solution from the generator is high, and the temperature of the concentrated solution needs to be lowered in order to enable the concentrated solution to absorb refrigerant vapor (water vapor). The dilute solution is heated through the heat exchanger, and the concentrated solution is cooled, so that the heat required by the generator can be reduced, and the efficiency is improved. The dilute solution in the dilute solution storage tank flows through the heat exchanger and enters the generator, after gas-liquid separation, refrigerant vapor (water vapor) in the generator enters the condenser to be cooled and cooled into water, and concentrated solution after evaporation and concentration flows through the heat exchanger and enters the concentrated solution storage tank, which belongs to the conventional technical means, so the specific structure is not detailed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Two modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A composite solar energy lithium bromide absorption air conditioning system is characterized in that the system comprises a solar heat collector, a heat pump system, a heat storage water tank, a starting water tank, an absorber, a generator, a concentrated solution storage tank, a dilute solution storage tank solution heat exchanger, an evaporator, a condenser, a refrigerant storage tank, a cooling tower and an air handling unit, wherein,
the output end of the solar thermal collector is connected with one end of a heat pump system through a first one-way electromagnetic valve, the other end of the heat pump system is connected with a first input end of a first three-way electromagnetic valve, the output end of the first three-way valve is connected with one end of a generator, the other end of the generator is respectively connected with a first input end of a second three-way electromagnetic valve and an input end of a seventh one-way electromagnetic valve, the output end of the second three-way electromagnetic valve is connected with a water inlet of a thermal storage water tank, a water outlet of the thermal storage water tank is connected with the input end of the solar thermal collector through a hot water pump to form a hot water circulation loop, the output end of the seventh one-way electromagnetic valve is connected with a water inlet of a starting water tank, a water outlet of the starting water tank is connected with the hot water pump, the input end of the second one-way electromagnetic valve is connected with the output end of the solar heat collector;
the generator, the condenser, the refrigerant storage tank, the throttle valve, the evaporator, the absorber, the fifth one-way solenoid valve, the dilute solution storage tank, the solution pump and the solution heat exchanger are sequentially connected through pipelines to form a refrigerant loop, one end of the concentrated solution storage tank is connected with the solution heat exchanger, the other end of the concentrated solution storage tank is connected with the absorber through the sixth one-way solenoid valve, and the concentrated solution storage tank and the dilute solution storage tank form a parallel structure;
cooling water in the cooling tower flows through the absorber and the condenser in sequence through the cooling water pump and flows into the cooling tower through the third one-way electromagnetic valve to form a cooling water loop;
air conditioner cold water in the air handling unit flows through the evaporator through a pipeline and flows back to the air handling unit through a fourth one-way electromagnetic valve to form an air conditioner cold water loop;
the refrigerant in the refrigerant storage tank is water, and the solution in the concentrated solution storage tank and the solution in the dilute solution storage tank are lithium bromide solutions.
2. The hybrid solar lithium bromide absorption air conditioning system of claim 1 wherein the hot water storage tank and the start-up water tank are both temperature stratification.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853939.6A CN107388620B (en) | 2017-09-20 | 2017-09-20 | Composite solar lithium bromide absorption type air conditioning system |
| PCT/CN2017/116345 WO2019056604A1 (en) | 2017-09-20 | 2017-12-15 | Combined energy-based solar lithium bromide absorption trigeneration system |
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| CN201710853939.6A CN107388620B (en) | 2017-09-20 | 2017-09-20 | Composite solar lithium bromide absorption type air conditioning system |
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| CN107388620A CN107388620A (en) | 2017-11-24 |
| CN107388620B true CN107388620B (en) | 2020-05-05 |
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| CN107388620B (en) * | 2017-09-20 | 2020-05-05 | 河海大学常州校区 | Composite solar lithium bromide absorption type air conditioning system |
| CN108019983A (en) * | 2018-01-23 | 2018-05-11 | 华北电力大学 | New type solar energy list tank phase-change heat storage absorption heat pump |
| CN108981229A (en) * | 2018-08-09 | 2018-12-11 | 青岛理工大学 | Subway waste heat source heat pump system with auxiliary cold source and working method thereof |
| CN109269143B (en) * | 2018-10-26 | 2024-04-16 | 中交第四航务工程勘察设计院有限公司 | Novel absorption heat pump and application method thereof |
| CN109654574A (en) * | 2018-12-12 | 2019-04-19 | 湖南东尤水汽能热泵制造有限公司 | A kind of air can be with solar energy tandem heat source heat pump unit |
| CN110044098A (en) * | 2019-05-20 | 2019-07-23 | 天津商业大学 | A kind of refrigeration system with lithium bromide absorption of wind-light-electricity joint driving |
| CN110388756A (en) * | 2019-07-22 | 2019-10-29 | 湖南哲能赫新能源有限责任公司 | A kind of photovoltaic and photothermal solar system of combination phase-change microcapsule |
| CN111692775B (en) * | 2020-06-22 | 2022-01-11 | 国网综合能源服务集团有限公司 | Lithium bromide absorption heat pump |
| CN112460703A (en) * | 2020-11-17 | 2021-03-09 | 武汉理工大学 | Cold beam air conditioner device utilizing solar energy for refrigeration and heating |
| CN113503657B (en) * | 2021-06-17 | 2022-03-22 | 燕山大学 | Solar auxiliary heat pump system integrating waste heat recovery and self-cleaning functions |
| CN113686045B (en) * | 2021-08-09 | 2022-09-06 | 天津乐科节能科技有限公司 | Ammonia water absorption heat pump system and method with low solution pump power consumption |
| CN113915795B (en) * | 2021-09-27 | 2023-03-03 | 河南科技大学 | Solar solution latent heat energy storage double-source heat pump system |
| CN115247909B (en) * | 2022-01-20 | 2023-05-12 | 衢州学院 | Solar heat pump equipment capable of adaptively adjusting working mode |
| CN114738068A (en) * | 2022-04-29 | 2022-07-12 | 西安交通大学 | Heat pump electricity storage system coupled with low-temperature geothermal heat and operation method |
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2017
- 2017-09-20 CN CN201710853939.6A patent/CN107388620B/en active Active
- 2017-12-15 WO PCT/CN2017/116345 patent/WO2019056604A1/en active Application Filing
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| WO2019056604A1 (en) | 2019-03-28 |
| CN107388620A (en) | 2017-11-24 |
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