CN112113367A - Solar thermal-driven improved solution absorption heat pump system and dehumidification air-conditioning system - Google Patents
Solar thermal-driven improved solution absorption heat pump system and dehumidification air-conditioning system Download PDFInfo
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 58
- 238000007791 dehumidification Methods 0.000 title claims abstract description 37
- 238000004378 air conditioning Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 188
- 239000006096 absorbing agent Substances 0.000 claims abstract description 68
- 239000003507 refrigerant Substances 0.000 claims abstract description 54
- 238000004321 preservation Methods 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 238000005338 heat storage Methods 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 description 178
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 14
- 238000005485 electric heating Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0014—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using absorption or desorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
- F24F2003/1446—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only by condensing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sustainable Energy (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses an improved solution absorption heat pump system and a dehumidification air-conditioning system driven by solar heat, which are characterized in that: the first module is a solar heat collection and heat exchange unit and comprises a solar heat collector, a first water pump, a first control device, a solid electric heat storage device, a first temperature sensor, a first heat preservation water tank, a first counter-flow heat exchanger and a third counter-flow heat exchanger; the second module is an improved solution absorption heat pump unit, and the first-class absorption heat pump comprises a second absorber, a second generator, a second solution heat exchanger, a second solution pump, a second refrigerant pump, a second evaporator and a second condenser; the second-type absorption heat pump comprises a first absorber, a first generator, a first solution heat exchanger, a first solution pump, a first refrigerant pump, a first evaporator and a first condenser; and the third module is a solution dehumidification air-conditioning system and comprises a surface cooling heat exchanger, a second counter-current heat exchanger, a solution dehumidifier, a solution regenerator, a dilute solution tank and a concentrated solution tank.
Description
Technical Field
The invention relates to an air conditioning system, in particular to an improved solution absorption heat pump system driven by solar heat and a dehumidification air conditioning system.
Background
At present, the single small building in summer generally uses an air conditioner to cool the indoor space, domestic hot water is prepared by using electric energy, and a large amount of electric energy is consumed for preparing domestic water by air conditioner refrigeration and electric heating, so that the single small building is huge economic overhead. The existing solar heat recovery driving solution dehumidification air-conditioning system heats the dilute solution of the solution dehumidification air-conditioning system through solar heat recovery and auxiliary electric heating equipment, and low-temperature water is required to be introduced to cool the concentrated solution of the solution dehumidification air-conditioning system, and the system can only dehumidify and cool air, and lacks pre-cooling of air to be treated and supply of domestic hot water.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an improved solution absorption heat pump system and a dehumidification air-conditioning system driven by solar heat.
The purpose of the invention is realized by the following technical scheme.
The invention relates to an improved solution absorption heat pump system and a dehumidification air-conditioning system driven by solar energy, which comprise three modules, wherein the first module is a solar heat collection heat exchange unit, the second module is an improved solution absorption heat pump unit and is an HPT system formed by a second type of absorption heat pump and a first type of absorption heat pump together, and the third module is a solution dehumidification air-conditioning system;
the first module comprises a solar thermal collector and a first control device, the outlet end of the solar thermal collector is connected with the inlet end of a first heat-preservation water tank, the outlet end of the first heat-preservation water tank is respectively connected with the heat source inlet ends of a first counter-flow heat exchanger and a third counter-flow heat exchanger through a flow dividing tee joint, the heat source outlet ends of the first counter-flow heat exchanger and the third counter-flow heat exchanger are converged and connected with a first water pump water inlet through a flow combining tee joint, and a first water pump water outlet is connected with the inlet end of; the first control device is respectively and electrically connected with a first temperature sensor for measuring the water temperature in the first heat-preservation water tank and a solid electric heat storage device for heating the water in the first heat-preservation water tank;
the second module consists of a first absorption heat pump and a second absorption heat pump; the first-class absorption heat pump comprises a second absorber, a second generator, a second solution heat exchanger, a second solution pump and a second refrigerant pump, wherein a second evaporator is arranged at the upper end in the second absorber, and a second condenser is arranged at the upper end in the second generator; a tube side inlet of the second solution heat exchanger is connected with a solution outlet of the second generator, the tube side outlet is connected with a solution pipeline and extends to the inside of the second absorber, a shell side inlet is connected with a solution outlet of the second absorber through a second solution pump, and a shell side outlet is connected with the solution pipeline and extends to the inside of the second generator; the second refrigerant pump inlet is connected with the bottom of the second evaporator through a pipeline, the second refrigerant pump outlet is connected with the refrigerant pipeline and extends to the right upper end of the second evaporator through the side wall of the second absorber, and the refrigerant inlet at the top of the second absorber is connected with the refrigerant outlet at the bottom of the second condenser through a pipeline; the water inlet of the outdoor pipe network is connected with the hot water inlet end of a second absorber, and the hot water outlet end of the second absorber is connected with the hot water inlet end of a second condenser through a pipeline;
the second-type absorption heat pump comprises a first absorber, a first generator, a first solution heat exchanger, a first solution pump and a first refrigerant pump, wherein a first evaporator is arranged at the upper end inside the first absorber, and a first condenser is arranged at the upper end inside the first generator; a tube side inlet of the first solution heat exchanger is connected with a solution outlet of the first generator, a tube side outlet is connected with a solution pipeline and extends to the inside of the first absorber, a shell side inlet is connected with a solution outlet of the first absorber through a first solution pump, and a shell side outlet is connected with the solution pipeline and extends to the inside of the first generator; the first refrigerant pump inlet is connected with the bottom of the first evaporator through a pipeline, the first refrigerant pump outlet is connected with a refrigerant pipeline and penetrates through the side wall of the first absorber to extend to the upper end of the first evaporator, and the refrigerant inlet at the top of the first absorber is connected with the refrigerant outlet at the bottom of the first condenser through a pipeline; the water inlet of the outdoor pipe network is connected with a hot water inlet end of a first absorber, a hot water outlet end of the first absorber is connected with a hot water inlet end of a first condenser through a pipeline, a hot water outlet end of the first condenser is connected with an inlet end of a second heat-preservation water tank, an outlet end of the second heat-preservation water tank is connected with an inlet end of a third water pump, an outlet end of the third water pump is connected with a steam inlet end of a second generator, a steam condensate outlet end of the second generator and a hot water outlet end of the second condenser are converged in one pipeline through three-way confluence, an outlet of the three-way is connected with an inlet end of a sixth water;
the cold source outlet end of the first countercurrent heat exchanger is connected with the steam inlet end of the first generator through a pipeline, the steam condensate outlet end of the first countercurrent heat exchanger is connected with the inlet end of the second water pump through a pipeline, and the outlet end of the second water pump is connected with the cold source inlet end of the first countercurrent heat exchanger through a pipeline to complete circulation;
the third module comprises a surface cooling heat exchanger, a second counter-current heat exchanger, a solution dehumidifier, a solution regenerator, a dilute solution tank and a concentrated solution tank; the cold source outlet end of the second countercurrent heat exchanger is connected with the hot source water inlet end of the first evaporator, the hot source water outlet end of the first evaporator is connected with the hot source water inlet end of the second evaporator, the hot source water outlet end of the second evaporator is connected with the water inlet of a fourth water pump, the water outlet of the fourth water pump is connected with the inlet end of the surface cooling heat exchanger, and the outlet end of the surface cooling heat exchanger is connected with the cold source inlet end of the second countercurrent heat exchanger, so that circulation is completed;
the fresh air introduced from the outdoor is connected with the suction end of the fan coil pipe through a pipeline, the air outlet end of the fresh air is connected with the inlet end of a second fan, and the outlet end of the second fan is connected with the air inlet end of a solution regenerator;
the solution outlet end of the solution dehumidifier is connected with the inlet end of a third solution pump, the outlet end of the third solution pump is connected with the inlet end of a dilute solution tank, the outlet end of the dilute solution tank is connected with the cold source inlet end of a third countercurrent heat exchanger, the cold source outlet end of the third countercurrent heat exchanger is connected with the solution inlet end of a solution regenerator, the solution outlet end of the solution regenerator is connected with the inlet end of an electric three-way valve, the outlet end of the electric three-way valve is divided into two paths, one path is connected with the inlet end of a fourth solution pump, the outlet end of the fourth solution pump is converged and converged with a pipeline connected between the cold source outlet end of the third countercurrent heat exchanger and the solution inlet end of the solution regenerator through a converging tee, the other path is connected with the inlet end of a concentrated solution tank, the cycle is completed.
The second heat preservation water tank is provided with a second temperature sensor for measuring the water temperature inside the second heat preservation water tank and an auxiliary electric heater for heating the water inside the second heat preservation water tank, and the second temperature sensor and the auxiliary electric heater are both electrically connected with the second control device.
The air conveying pipeline to be processed is connected with the air inlet end of the surface cooling heat exchanger, the air outlet end of the air conveying pipeline is connected to the inlet end of the solution dehumidifier through a pipeline, and the outlet end of the air conveying pipeline is conveyed into a room through a first fan.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention can effectively utilize the solar energy, the heat energy prepared by the absorber and the condenser of the second absorption heat pump (AHT) is used as the driving heat source of the second absorption heat pump (AHT) to generate high-grade heat energy, the HPT system formed by the absorber and the condenser of the second absorption heat pump (AHT) is superior to a single absorption heat pump in performance, compared with the first absorption heat pump, the invention can prepare higher-grade heat when adopting a lower low-temperature driving heat source and can generate more intermediate-temperature heat energy, thereby improving the utilization efficiency of the heat energy and generating more domestic hot water, the system can also heat the regenerated air of the solution dehumidification air-conditioning system, simultaneously can pre-cool and dehumidify the air to be treated and cool down the concentrated solution of the solution dehumidification air-conditioning system, the solution dehumidification air-conditioning can utilize the low-temperature heat energy of the solar energy and the cold energy generated by the HPT system to normally operate, the solar energy dehumidification system has the advantages of being capable of dehumidifying air, saving energy, improving solar energy utilization efficiency, fully utilizing the characteristic of low night electricity price, reducing expenditure of electric energy utilization, being remarkable in economic benefit, utilizing clean energy, being simple in structure and modularized, and being capable of meeting the requirements of refrigerating and dehumidifying all day long-time air conditioning systems in single small-sized buildings such as villas or rural areas and living hot water.
Drawings
Fig. 1 is a flow chart of the structure of the improved solution absorption heat pump system and the dehumidification air-conditioning system driven by solar heat according to the invention.
Fig. 2 is a profile connection diagram of an absorption heat pump of a first type.
Fig. 3 is a cross-sectional view of the counter flow heat exchanger profile.
Reference numerals: 1 a solar heat collector, 2 a first water pump, 3 a first control device, 4 a solid electric heat storage device, 5 a first temperature sensor, 6 a first heat preservation water tank, 7 a first counterflow heat exchanger, 8 a second water pump, 9 (a first generator), 10 a first condenser, 11 a second temperature sensor, 12 a second control device, 13 an auxiliary electric heater, 14 a third water pump, 15 a second generator, 16 a first evaporator, 17 a surface cooling heat exchanger, 18 a second counterflow heat exchanger, 19 a fourth water pump, 20 a first absorber, 21 a second evaporator, 22 a second absorber, 23 a fifth water pump, 24 a second condenser, 25 a sixth water pump, 26 a fan coil, 27 a first solution pump, 28 a first solution heat exchanger, 29 a second solution pump, 30 a second solution heat exchanger, 31 a first refrigerant pump, 32 a second refrigerant pump, 33 a solution dehumidifier, 34 a first fan, 35 a third solution pump, a 36 dilute solution tank, a 37 solution regenerator, a 38 electric three-way valve, a 39 fourth solution pump, a 40 concentrated solution tank, a 41 fifth solution pump, a 42 second fan, a 43 third counter-current heat exchanger and a 44 second heat-preservation water tank.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. The embodiment is implemented on the premise of the technical scheme of the invention, and a detailed specific operation process is given.
As shown in fig. 1 to 3, the improved solution absorption heat pump system and the dehumidification air-conditioning system driven by solar heat of the present invention includes three modules, i.e., a module i, a module ii, and a module iii.
The first module is a solar heat collection and heat exchange unit and comprises a solar heat collector 1, a first water pump 2, a first control device 3, a solid electric heat storage device 4, a first temperature sensor 5, a first heat preservation water tank 6, a first counter-flow heat exchanger 7 and a third counter-flow heat exchanger 43. Specifically, the outlet end of the solar heat collector 1 is connected with the inlet end of a first heat-preservation water tank 6, the outlet end of the first heat-preservation water tank 6 is respectively connected with the heat source inlet ends of a first countercurrent heat exchanger 7 and a third countercurrent heat exchanger 43 through a flow dividing tee joint, the heat source outlet ends of the first countercurrent heat exchanger 7 and the third countercurrent heat exchanger 43 are connected with the water inlet of a first water pump 2 in a gathering mode through a flow combining tee joint, and the water outlet of the first water pump 2 is connected with the inlet end of the solar heat collector 1 through a pipeline to. The first control device 3 is respectively and electrically connected with a first temperature sensor 5 for measuring the temperature of water in the first heat-preservation water tank 6 and a solid electric heat storage device 4 for heating the water in the first heat-preservation water tank 6.
The solar heat collector 1 is used for collecting solar energy and utilizing heat thereof, exchanges heat with the first countercurrent heat exchanger 7, is used for heating dilute solution of the solution dehumidification air-conditioning system, and is used as a driving heat source of the second-type absorption heat pump. The solid electric heat storage device 4 is used for storing electric heat at night, and the characteristic of low electricity price at night is fully utilized to store heat. The first temperature sensor 5 records the temperature in the first holding water tank 6 and transmits the temperature data to the first control device 3. The first control device 3 is used for collecting data of the first temperature sensor 5, processing and analyzing the data, and controlling heat release of the solid electric heat storage device when the temperature is lower than 70 ℃ so as to maintain the temperature in the counter-flow heat exchanger at 70-90 ℃.
The solid electric heat storage device 4 works at night to convert electric energy into heat energy to be stored, in the daytime, when the first temperature sensor 5 detects that the temperature in the loop is lower than 70 ℃, data are transmitted to the first control device 3, the first control device 3 controls the solid electric heat storage device 4 to release heat, water in the first heat preservation water tank 6 is heated to maintain the temperature of the water at more than 70 ℃, water flowing out of the first heat preservation water tank 6 is divided into two parts and flows into the first countercurrent heat exchanger 7 and the third countercurrent heat exchanger 43 respectively, and hydration flowing out of the two countercurrent heat exchangers is pressurized by the first water pump 2 to return to the solar heat collector 1.
The second module is an improved solution absorption heat pump unit, and is an HPT system formed by a second type absorption heat pump (AHT) and a first type Absorption Heat Pump (AHP) together, and the system comprises five sets of circulation. The heat produced by the second absorption heat pump (AHT) absorber is used as a high-temperature heat source required by the first Absorption Heat Pump (AHP) generator, and the result shows that the performance of the HPT system formed by the second absorption heat pump and the AHP absorber is superior to that of a single absorption heat pump, and compared with the first absorption heat pump, the HPT system can produce high-grade heat when a low-temperature driving heat source is adopted. The evaporator of the heat pump of the HPT air-conditioning system is used for absorbing heat of the water-water heat exchanger, precooling air to be treated and cooling concentrated solution in the LiCl and CaCl mixed solution dehumidification air-conditioning system.
The first-type absorption heat pump comprises a second absorber 22, a second generator 15, a second solution heat exchanger 30, a second solution pump 29 and a second refrigerant pump 32, wherein a second evaporator 21 is arranged at the upper end inside the second absorber 22, and a second condenser 24 is arranged at the upper end inside the second generator 15. The tube-side inlet of the second solution heat exchanger 30 is connected to the solution outlet of the second generator 15, the tube-side outlet is connected to the solution pipeline and extends to the inside of the second absorber 22, the shell-side inlet is connected to the solution outlet of the second absorber 22 through a second solution pump 29, and the shell-side outlet is connected to the solution pipeline and extends to the inside of the second generator 15. The inlet of the second refrigerant pump 32 is connected with the bottom of the second evaporator 21 through a pipeline, the outlet of the second refrigerant pump 32 is connected with the refrigerant pipeline and extends to the upper end of the second evaporator 21 through the side wall of the second absorber 22, and the top refrigerant inlet of the second absorber 22 is connected with the bottom refrigerant outlet of the second condenser 24 through a pipeline. The water inlet of the outdoor pipe network is connected with the hot water inlet end of the second absorber 22, and the hot water outlet end of the second absorber 22 is connected with the hot water inlet end of the second condenser 24 through a pipeline.
The second-type absorption heat pump comprises a first absorber 20, a first generator 9, a first solution heat exchanger 28, a first solution pump 27 and a first refrigerant pump 31, wherein a first evaporator 16 is arranged at the upper end inside the first absorber 20, and a first condenser 10 is arranged at the upper end inside the first generator 9; a tube side inlet of the first solution heat exchanger 28 is connected with a solution outlet of the first generator 9, the tube side outlet is connected with a solution pipeline and extends into the first absorber 20, a shell side inlet is connected with a solution outlet of the first absorber 20 through a first solution pump 27, and a shell side outlet is connected with the solution pipeline and extends into the first generator 9; the inlet of the first refrigerant pump 31 is connected with the bottom of the first evaporator 16 through a pipeline, the outlet of the first refrigerant pump 31 is connected with the refrigerant pipeline and passes through the side wall of the first absorber 20 to extend to the upper end of the first evaporator 16, and the refrigerant inlet at the top of the first absorber 20 is connected with the refrigerant outlet at the bottom of the first condenser 10 through a pipeline. The water inlet of the outdoor pipe network is connected with the hot water inlet end of a first absorber 20, the hot water outlet end of the first absorber 20 is connected with the hot water inlet end of a first condenser 10 through a pipeline, the hot water outlet end of the first condenser 10 is connected with the inlet end of a second heat-preservation water tank 44, the outlet end of the second heat-preservation water tank 44 is connected with the inlet end of a third water pump 14, the outlet end of the third water pump 14 is connected with the steam inlet end of a second generator 15, the steam condensate outlet end of the second generator 15 and the hot water outlet end of a second condenser 24 are converged in a pipeline through three-way confluence, the three-way outlet is connected with the inlet end of a sixth water pump 25, the outlet end of the.
And the cold source outlet end of the first countercurrent heat exchanger 7 is connected with the steam inlet end of the first generator 9 through a pipeline, the steam condensate outlet end of the first countercurrent heat exchanger is connected with the inlet end of the second water pump 8 through a pipeline, and the outlet end of the second water pump 8 is connected with the cold source inlet end of the first countercurrent heat exchanger 7 through a pipeline to complete circulation. The second holding water tank 44 is provided with a second temperature sensor 11 for measuring the temperature of water inside the second holding water tank and an auxiliary electric heater 13 for heating water inside the second holding water tank, and both the second temperature sensor 11 and the auxiliary electric heater 13 are electrically connected with the second control device 12.
The first absorber 20 is used for absorbing refrigerant vapor and emitting high-temperature heat, normal-temperature water at the temperature of 10-40 ℃ in the pipeline is heated to 100-150 ℃, and the prepared heat is used as a high-temperature heat source required by the second generator 15 in the first absorption heat pump. The first generator 9 is used to absorb the driving heat and generate refrigerant vapor. The first condenser 10 is used for producing condensation heat, heating low-temperature water at 5-20 ℃ from an outdoor pipe network to 15-30 ℃, absorbing heat in a second absorber 22 and a second condenser 24 in the first absorption heat pump, and then heating the low-temperature water to 70-90 ℃, mixing the high-temperature water with high-temperature water subjected to heat exchange in a second generator 15 in the first absorption heat pump, and outputting the high-temperature water as domestic hot water. The first evaporator 16 and the second evaporator 21 are used for cooling the temperature-reducing solution and dehumidifying the concentrated solution of the air conditioning system. The first solution heat exchanger 28 is used for exchanging heat between the LiBr concentrated solution and the dilute solution. The first heat-preservation water tank 6 and the second heat-preservation water tank 44 are used for collecting and storing high-temperature water. The first counter-flow heat exchanger 7 and the second counter-flow heat exchanger 18 exchange water/water heat with cold and heat sources. The first solution pump 27, the second solution pump 29, the third solution pump 35, the fourth solution pump 39, the fifth solution pump 41, the first refrigerant pump 31, the second refrigerant pump 32, the first water pump 2, the second water pump 8, the third water pump 14, the fourth water pump 19, the fifth water pump 23, the sixth water pump 25, the first fan 34, and the second fan 42 are all power devices, and are all used for conveying fluid or pressurizing fluid, so that circulation can be continuously performed. The second temperature sensor 11 is used for recording the temperature of the water outlet of the first condenser 10 in the second-type absorption heat pump, and transmitting the temperature data to the second control device 12. The second control device 12 is used for collecting data of the second temperature sensor 11, processing and analyzing the data, and controlling the auxiliary electric heater 13. The auxiliary electric heater 13 is used for heating the effluent after heat exchange with the first absorber 20 in the second-class absorption heat pump, and heating the effluent when the temperature of the effluent is lower than 120 ℃.
Wherein, the water in the first circulation is a closed loop is pressurized and conveyed by a second water pump 8, heat is exchanged by a first countercurrent heat exchanger 7, the temperature is raised to 70 ℃, the water is sent into a first generator 9 for heat release, and then the water returns to the second water pump 8 to complete circulation; the second circulation is that normal temperature water with the temperature of 10-40 ℃ is introduced into an external pipeline, the normal temperature water absorbs heat through the first absorber 20 and the first condenser 10, high temperature water with the temperature of 100-150 ℃ flows through the second heat preservation water tank 44, the high temperature water is detected by the second temperature sensor 11, when the temperature is lower than 120 ℃, data are transmitted to the second control device 12, the second control device 12 controls the auxiliary electric heater 13, water in the electric heating network is adopted to increase the temperature of the water to 120 ℃, and the water is conveyed to the second generator 15 through the third water pump 14 to release heat; the third circulation is that the low-temperature water introduced into the outdoor pipe network passes through the second absorber 22 and the second condenser 24 in sequence, absorbs heat, then is mixed with the water discharged from the second generator 15 in the second circulation, and is pressurized and distributed by the sixth water pump 25, passes through the fan coil 26, and finally outputs domestic hot water; the fourth cycle is the internal cycle of a second-class absorption heat pump unit (AHT), LiBr dilute solution flows into the first generator 9 first to generate low-pressure refrigerant steam, the concentration of the LiBr solution is improved to become concentrated solution, the concentrated solution exchanges heat through the first solution heat exchanger 28 and flows into the first absorber 20, the generated refrigerant steam is cooled into refrigerant liquid in the first condenser 10 and flows into the first evaporator 16 to absorb heat in the first evaporator 16 to become high-pressure refrigerant steam which enters the first absorber 20, and the refrigerant steam is absorbed by the LiBr concentrated solution to form LiBr dilute solution to complete the cycle; the fifth cycle is an internal cycle of the first-class absorption heat pump unit (AHP), refrigerant liquid firstly enters the second evaporator 21 to absorb heat, is evaporated into low-temperature refrigerant steam and enters the second absorber 22, the low-temperature refrigerant steam is absorbed by the LiBr concentrated solution in the second absorber 22 to form a dilute solution, the dilute solution exchanges heat through the second solution heat exchanger 30 and enters the second evaporator 15, heat is absorbed in the second evaporator 15 to generate high-pressure refrigerant steam, meanwhile, the concentration of the LiBr solution is improved to form a concentrated solution, and the concentrated solution enters the second absorber 22 through the second solution heat exchanger 30 to complete the cycle.
The third module is a solution dehumidification air-conditioning system, the dilute solution absorbs heat prepared by the solar heat collection and heat exchange unit, the temperature of the dilute solution is improved, the concentrated solution absorbs cold in the evaporator of the HPT heat pump system in the second module, the temperature of the concentrated solution is reduced, meanwhile, the air to be treated is subjected to primary cooling and dehumidification through a surface air cooler, the dehumidification load of the solution dehumidification air-conditioning system is reduced, the introduced air exchanges heat with the prepared domestic hot water to form regenerated air, and the regenerated solution is formed through a solution regenerator. The system comprises four sets of circulation, and the equipment comprises a surface cooling heat exchanger 17, a second countercurrent heat exchanger 18, a solution dehumidifier 33, a first fan 34, a third solution pump 35, a dilute solution tank 36, a solution regenerator 37, an electric three-way valve 38, a fourth solution pump 39, a concentrated solution tank 40, a fifth solution pump 41 and a second fan 42. Specifically, the cold source outlet end of the second countercurrent heat exchanger 18 is connected with the first evaporator heat source water inlet end, the first evaporator heat source water outlet end is connected with the second evaporator heat source water inlet end, the second evaporator heat source water outlet end is connected with the fourth water pump 19 water inlet, the fourth water pump 19 water outlet is connected with the surface cooling heat exchanger 17 inlet end, and the surface cooling heat exchanger 17 outlet end is connected with the second countercurrent heat exchanger 17 cold source inlet end, so that circulation is completed.
The fresh air introduced from the outdoor is connected with the suction end of the fan coil 26 through a pipeline, the air outlet end of the fresh air is connected with the inlet end of the second fan 42, and the outlet end of the second fan 42 is connected with the air inlet end of the solution regenerator 37.
The solution outlet end of the solution dehumidifier 33 is connected with the inlet end of a third solution pump 35, the outlet end of the third solution pump 35 is connected with the inlet end of a dilute solution tank 36, the outlet end of the dilute solution tank is connected with the cold source inlet end of a third countercurrent heat exchanger 43, the cold source outlet end of the third countercurrent heat exchanger is connected with the solution inlet end of a solution regenerator 37, the solution outlet end of the solution regenerator 37 is connected with the inlet end of an electric three-way valve 38, the outlet end of the electric three-way valve 38 is divided into two paths, one path is connected with the inlet end of a fourth solution pump 39, the outlet end of the fourth solution pump 39 is converged with a pipeline connected between the cold source outlet end of the third countercurrent heat exchanger 43 and the solution inlet end of the solution regenerator 37 through a converging three-way valve, the other path is connected with the inlet end of a concentrated solution tank 40, the outlet end, the cycle is completed.
The air conveying pipeline to be treated is connected with the gas inlet end of the surface cooling heat exchanger 17, the gas outlet end of the air conveying pipeline is connected with the inlet end of the solution dehumidifier 33 through a pipeline, and the outlet end of the air conveying pipeline is conveyed into a room through a first fan 34.
Wherein, the solution dehumidifier 33 is used for removing water vapor in the air to be treated, so as to achieve the dehumidification effect. The dilute solution tank 36 is used for storing the dilute solution flowing out from the solution dehumidifier 33. The solution regenerator 37 is used for treating the dilute solution generated in the solution dehumidifier 33, and the regenerated solution is formed through regeneration air treatment. The concentrated solution tank 40 is used to store the concentrated solution flowing out from the solution regenerator 37. The surface cooling heat exchanger 17 is used for pre-cooling air to be treated and reducing the dehumidification load of the solution dehumidification air conditioning system.
The first circulation is closed circulation, the waterway after heat exchange by the second countercurrent heat exchanger 18 is sequentially the first evaporator 16 and the second evaporator 21 to release heat, the heat is pressurized and conveyed by the fourth water pump 19, and the heat is absorbed by the surface cooling heat exchanger 17 and then returns to the second countercurrent heat exchanger 18, so that the closed circulation is completed; the second circulation is that the dilute solution flows out from the solution dehumidifier 33, is transmitted and distributed by the third solution pump 35, sequentially passes through the dilute solution tank 36 and the third countercurrent heat exchanger 43, and flows into the solution regenerator 37, one part of the concentrated solution flowing out from the solution regenerator 37 passes through the fourth solution pump 39 and is mixed with the dilute solution, the other part passes through the concentrated solution tank 40, the fifth solution pump 41 and the second countercurrent heat exchanger 18, and finally flows into the solution dehumidifier 33, and the circulation is completed; the third circulation is that the air to be treated is sent into the solution dehumidifier 33 after being subjected to pre-dehumidification treatment by the surface cooling heat exchanger 17, and the treated air is sent into the room by the first fan 34; the fourth cycle is that the air introduced from the outside is heated by the fan coil 26 and sent to the solution regenerator 37 by the fan 42, and the dilute solution in the solution regenerator is treated to generate the regeneration solution.
The invention relates to a solar heat collection unit which obtains heat through a solar heat collector, wherein the part of heat is used for heating dilute solution in a solution air-conditioning dehumidification system and is used as a driving heat source of a second type absorption heat pump, cold energy generated by an evaporator of an HPT absorption heat pump system is sequentially used for cooling air to be processed, the dehumidification load of the solution air-conditioning dehumidification system is reduced, concentrated solution of the solution air-conditioning dehumidification system is cooled, heat generated in an absorber of the second type absorption heat pump is used as a driving heat source of a generator of a first type absorption heat pump, heat generated by the concentrated solution of the dehumidification air-conditioning system is used as a low-temperature heat source of the evaporator of the HPT heat pump system, low-temperature water introduced into an outdoor water supply network sequentially passes through a condenser of the second type absorption heat pump, the absorber of the first type absorption heat pump, the condenser and low-temperature water, the generated domestic hot water releases heat in the counter-flow heat exchanger and heats hot air for solution regeneration, and the system is a system integrating solar heat recovery, air-conditioning refrigeration, dehumidification and domestic hot water.
While the present invention has been described in terms of its functions and operations with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise functions and operations described above, and that the above-described embodiments are illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined by the appended claims.
Claims (3)
1. An improved solution absorption heat pump system and a dehumidification air-conditioning system driven by solar heat are characterized by comprising three modules, wherein the first module is a solar heat collection heat exchange unit, the second module is an improved solution absorption heat pump unit and is an HPT (high pressure refrigerant transport) system formed by a second type of absorption heat pump and a first type of absorption heat pump together, and the third module is a solution dehumidification air-conditioning system;
the first module comprises a solar heat collector (1) and a first control device (3), the outlet end of the solar heat collector (1) is connected with the inlet end of a first heat-preservation water tank (6), the outlet end of the first heat-preservation water tank (6) is respectively connected with the heat source inlet ends of a first countercurrent heat exchanger (7) and a third countercurrent heat exchanger (43) through a shunt tee joint, the heat source outlet ends of the first countercurrent heat exchanger (7) and the third countercurrent heat exchanger (43) are connected with the water inlet of a first water pump (2) in a gathering mode through a flow-combining tee joint, and the water outlet of the first water pump (2) is connected with the inlet end of the solar heat collector (1; the first control device (3) is electrically connected with a first temperature sensor (5) for measuring the temperature of water in the first heat-preservation water tank (6) and a solid electric heat storage device (4) for heating the water in the first heat-preservation water tank (6) respectively;
the second module consists of a first absorption heat pump and a second absorption heat pump; the first-class absorption heat pump comprises a second absorber (22), a second generator (15), a second solution heat exchanger (30), a second solution pump (29) and a second refrigerant pump (32), wherein a second evaporator (21) is arranged at the upper end inside the second absorber (22), and a second condenser (24) is arranged at the upper end inside the second generator (15); a tube side inlet of the second solution heat exchanger (30) is connected with a solution outlet of the second generator (15), the tube side outlet is connected with a solution pipeline and extends to the inside of the second absorber (22), a shell side inlet is connected with a solution outlet of the second absorber (22) through a second solution pump (29), and a shell side outlet is connected with the solution pipeline and extends to the inside of the second generator (15); the inlet of the second refrigerant pump (32) is connected with the bottom of the second evaporator (21) through a pipeline, the outlet of the second refrigerant pump (32) is connected with the refrigerant pipeline and extends to the right upper end of the second evaporator (21) through the side wall of the second absorber (22), and the refrigerant inlet at the top of the second absorber (22) is connected with the refrigerant outlet at the bottom of the second condenser (24) through a pipeline; the water inlet of the outdoor pipe network is connected with the hot water inlet end of a second absorber (22), and the hot water outlet end of the second absorber (22) is connected with the hot water inlet end of a second condenser (24) through a pipeline;
the second-type absorption heat pump comprises a first absorber (20), a first generator (9), a first solution heat exchanger (28), a first solution pump (27) and a first refrigerant pump (31), wherein a first evaporator (16) is arranged at the upper end inside the first absorber (20), and a first condenser (10) is arranged at the upper end inside the first generator (9); a tube side inlet of the first solution heat exchanger (28) is connected with a solution outlet of the first generator (9), the tube side outlet is connected with a solution pipeline and extends to the inside of the first absorber (20), a shell side inlet is connected with a solution outlet of the first absorber (20) through a first solution pump (27), and a shell side outlet is connected with the solution pipeline and extends to the inside of the first generator (9); the inlet of the first refrigerant pump (31) is connected with the bottom of the first evaporator (16) through a pipeline, the outlet of the first refrigerant pump (31) is connected with the refrigerant pipeline and extends to the right upper end of the first evaporator (16) through the side wall of the first absorber (20), and the refrigerant inlet at the top of the first absorber (20) is connected with the refrigerant outlet at the bottom of the first condenser (10) through a pipeline; the water inlet of an outdoor pipe network is connected with the hot water inlet end of a first absorber (20), the hot water outlet end of the first absorber (20) is connected with the hot water inlet end of a first condenser (10) through a pipeline, the hot water outlet end of the first condenser (10) is connected with the inlet end of a second heat-preservation water tank (44), the outlet end of the second heat-preservation water tank (44) is connected with the inlet end of a third water pump (14), the outlet end of the third water pump (14) is connected with the steam inlet end of a second generator (15), the steam condensate outlet end of the second generator (15) and the hot water outlet end of a second condenser (24) are converged in one pipeline through three-way confluence, a three-way outlet is connected with the inlet end of a sixth water pump (25), the outlet end of the sixth water pump (25);
the cold source outlet end of the first countercurrent heat exchanger (7) is connected with the steam inlet end of the first generator (9) through a pipeline, the steam condensate outlet end of the first countercurrent heat exchanger is connected with the inlet end of the second water pump (8) through a pipeline, and the outlet end of the second water pump (8) is connected with the cold source inlet end of the first countercurrent heat exchanger (7) through a pipeline to complete circulation;
the third module comprises a surface cooling heat exchanger (17), a second counter-current heat exchanger (18), a solution dehumidifier (33), a solution regenerator (37), a dilute solution tank (36) and a concentrated solution tank (40); the cold source outlet end of the second countercurrent heat exchanger (18) is connected with the hot source water inlet end of the first evaporator (16), the hot source water outlet end of the first evaporator (16) is connected with the hot source water inlet end of the second evaporator (21), the hot source water outlet end of the second evaporator (21) is connected with the water inlet of the fourth water pump (19), the water outlet of the fourth water pump (19) is connected with the inlet end of the surface cooling heat exchanger (17), and the outlet end of the surface cooling heat exchanger (17) is connected with the cold source inlet end of the second countercurrent heat exchanger (18) to complete circulation;
fresh air introduced outdoors is connected with the suction end of the fan (26) through a pipeline, the air outlet end of the fresh air is connected with the inlet end of the second fan (42), and the outlet end of the second fan (42) is connected with the air inlet end of the solution regenerator (37);
the solution outlet end of the solution dehumidifier (33) is connected with the inlet end of a third solution pump (35), the outlet end of the third solution pump (35) is connected with the inlet end of a dilute solution tank (36), the outlet end of the dilute solution tank (36) is connected with the cold source inlet end of a third countercurrent heat exchanger (43), the cold source outlet end of the third countercurrent heat exchanger (43) is connected with the solution inlet end of a solution regenerator (37), the solution outlet end of the solution regenerator (37) is connected with the inlet end of an electric three-way valve (38), the outlet end of the electric three-way valve (38) is divided into two paths, one path is connected with the inlet end of a fourth solution pump (39), the outlet end of the fourth solution pump (39) is converged and converged with a pipeline connected between the cold source outlet end of the third countercurrent heat exchanger (43) and the solution inlet end of the solution regenerator (37) through a converging tee, the, the outlet end of a fifth solution pump (41) is connected with the heat source inlet end of the second countercurrent heat exchanger (18), and the heat source outlet end of the second countercurrent heat exchanger (18) is connected with the solution inlet end of the solution dehumidifier (33) to complete circulation.
2. The solar heat-driven improved solution absorption heat pump system and the dehumidification air-conditioning system according to claim 1, wherein the second holding water tank (44) is provided with a second temperature sensor (11) for measuring the temperature of water inside thereof and an auxiliary electric heater (13) for heating the water inside thereof, and the second temperature sensor (11) and the auxiliary electric heater (13) are both electrically connected to the second control device (12).
3. The solar thermally driven improved solution absorption heat pump system and dehumidification air-conditioning system according to claim 1, wherein the air delivery pipeline to be treated is connected to the gas inlet end of the surface cooling heat exchanger (17), the gas outlet end thereof is connected to the inlet end of the solution dehumidifier (33) through a pipeline, and the outlet end thereof is delivered into the room through the first fan (34).
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