CN113531944A - Double-effect three-phase energy storage and absorption type refrigerating system - Google Patents
Double-effect three-phase energy storage and absorption type refrigerating system Download PDFInfo
- Publication number
- CN113531944A CN113531944A CN202110708614.5A CN202110708614A CN113531944A CN 113531944 A CN113531944 A CN 113531944A CN 202110708614 A CN202110708614 A CN 202110708614A CN 113531944 A CN113531944 A CN 113531944A
- Authority
- CN
- China
- Prior art keywords
- solution
- energy storage
- valve
- pressure
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
-
- 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
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
-
- 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
-
- 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
- Y02A30/272—Solar heating or cooling
-
- 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Landscapes
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
A double-effect three-phase energy storage and absorption type refrigerating system belongs to the field of solar heat pumps. The invention provides a double-effect three-phase energy storage and absorption refrigeration system, wherein the three-phase energy storage technology overcomes the danger brought by the traditional solar absorption heat pump solution crystallization, the load adjustment effect of the energy storage system on a solar heat pump is realized by the high energy storage density of lithium bromide aqueous solution, namely, vapor, liquid and solid, the three-phase energy storage capacity is enhanced, the energy storage density is obviously improved compared with a gas-liquid two-phase energy storage mode, the energy storage density can be improved by more than 50% by 50% of crystallization rate, in other words, the crystallization rate of 50% is reduced by more than half by the volume of an energy storage device, double-effect energy storage is realized on the basis of three-phase energy storage, the system can realize synchronous refrigeration and energy storage, the energy storage is realized in the daytime, the energy is released at night, the system runs all day, the solar energy utilization rate can be further improved, and the double-effect energy storage refrigeration system has high practical value in the field of building energy conservation.
Description
Technical Field
The invention belongs to the technical field of solar heat pumps, and particularly relates to a double-effect three-phase energy storage and absorption type refrigerating system running all day long.
Background
The application of solar energy in the air conditioning field is a relatively common technology, and the application of a solar absorption refrigeration air conditioning system is particularly common. Compared with the traditional single-effect lithium bromide absorption refrigeration, the double-effect machine can more effectively utilize a high-temperature heat source and improve the performance of the refrigerating machine. In order to improve the utilization rate of solar energy, the energy storage technology is combined with a solar double-effect lithium bromide absorption type refrigerating unit, so that the efficiency of the solar refrigeration air conditioner is further improved. The basic heat storage modes of the energy storage device of the solar absorption refrigeration air conditioner mainly include sensible heat type heat storage, latent heat type heat storage and thermochemical type heat storage. Sensible heat and latent heat (phase change) energy storage technology is the most widely researched and applied energy storage technology, the development of the sensible heat and latent heat (phase change) energy storage technology is mature, but thermochemical energy storage technology is still in the stages of theoretical exploration and laboratory research at present. As one of thermochemical energy storage technologies, the chemical solution three-phase energy storage technology based on the absorption principle has the advantages of high energy storage density, small heat loss and the like, and has important significance for improving energy efficiency and protecting the environment. In order to further explore the potential of solution energy storage and improve the energy storage density of a solution energy storage device, the invention provides a double-effect three-phase energy storage and absorption refrigeration system, which utilizes a lithium bromide-water solution as an energy storage medium, and arranges a high-pressure and low-pressure two-stage heat storage solution tank on the basis of three-phase energy storage, so that the energy storage capacity is further enhanced, the energy is stored in the daytime, the energy is released at night, the system operates all day, and the utilization rate of solar energy is further improved.
Disclosure of Invention
The invention provides a double-effect three-phase energy storage and absorption refrigeration system running all day long, wherein the three-phase energy storage adopts lithium bromide-water solution as an energy storage medium, the three-phase energy storage technology overcomes the danger caused by the crystallization of the solution of the traditional solar absorption heat pump, and the load regulation effect of the energy storage system on a solar heat pump is realized by the high energy storage density of vapor-liquid-solid three phases. The energy storage system adopts two-stage energy storage solution tanks, so that the energy storage efficiency is further improved. Meanwhile, the system is operated all day long, solar energy is efficiently utilized, and the solution in the double-effect three-phase energy storage solution tank is continuously heated and crystallized in the daytime until the energy storage is finished; the dilute solution from the absorber continuously dissolves the lithium bromide crystals at night until the end of the energy release.
A double-effect three-phase energy storage and absorption refrigeration system is characterized in that: the double-effect three-phase energy storage and absorption refrigeration system is applied to the following double-effect three-phase energy storage and absorption refrigeration and comprises a solar trough type heat collector (1), an oil storage tank (2), a high-pressure energy storage solution tank (3), a low-pressure energy storage solution tank (4), a water storage tank (5), an absorber (6), an evaporator (7), a condenser (8), a high-pressure generator (9), a low-pressure generator (10) and a cooling tower (11).
The solar trough heat collector (1), the oil storage tank (2) and the sixth circulating pump (P6) form a loop for heating heat collecting media, namely heat conducting oil. The oil storage tank (2) is respectively connected with the high-pressure energy storage solution tank (3) and the heat exchanger in the high-pressure generator (9) to form a heat collection medium circulation loop. A seventh valve three-way valve (V7) between the oil storage tank (2) and the high-pressure energy storage solution tank (3) is opened when the temperature of the heat transfer oil reaches 200 ℃ and flows into the energy storage system end. The solution in the high-pressure energy storage solution tank (3) is continuously sprayed on the internal heat exchanger through a first circulating pump (P1) and a first valve (V1). The high-pressure generator (9) is connected with a heat exchanger in the low-pressure generator (10), refrigerant steam generated by the high-pressure generator (9) and refrigerant steam generated by the low-pressure generator (10) enter the condenser (8) through a pipeline connected with the condenser (8) in the heat exchanger in the low-pressure generator (10) and a pipeline above the low-pressure generator (10) respectively after heat exchange, and the cooling tower (11) is connected with the condenser (8) to provide cooling water condensation refrigerant steam. Refrigerant enters the evaporator (7) through a fifth valve throttle valve (V5), and is conveyed by a fifth circulating pump (P5) to be sprayed on the surface of the heat exchanger, so that chilled water conveyed from a cooling area is cooled. The solution heated and concentrated in the high-pressure generator and the low-pressure generator enters an absorber (6) through a heat exchanger and a sixth valve (V6) to absorb refrigerant steam from an evaporator (7), is condensed into dilute solution by cooling water conveyed by a condenser (8), provides circulating power by a fourth circulating pump (P4), and returns to the high-pressure generator (9) and the low-pressure generator (10) after being shunted again. The high-pressure energy storage solution tank (3), the low-pressure energy storage solution tank (4) and the absorber (6) form a solution circulation loop, concentrated solutions in the two solution tanks enter the absorber (6) through an eighth valve (V8) and are sprayed on the surface of the heat exchanger through solution nozzles, and the concentrated solutions absorb water vapor from the evaporator (7) in the absorber (6) to be diluted into dilute solutions. And respectively reflows to the high-pressure solution tank (3) and the low-pressure solution tank (4) through a fourth circulating pump (P4) and a fourth valve (V4). The high-pressure solution tank (3) is connected with a heat exchanger in the low-pressure solution tank (4) through a pipeline, a heat exchange medium is refrigerant steam generated in the high-pressure solution tank (3) and used for heating the solution in the low-pressure energy storage solution tank (4), and the solution is continuously sprayed on the heat exchanger through a second circulating pump (P2) and a third valve (V3). Heat exchange medium releases heat and then enters the water storage tank (5) through a pipeline, steam generated after solution in the low-pressure energy storage solution tank (4) is heated also enters the water storage tank (5) through an upper pipeline, all cooling water circulated from the cooling tower (11) is condensed into liquid, the cooling tower (11) is connected with a heat exchanger in the water storage tank (5) through a pipeline, and liquid water in the water storage tank (5) is sprayed on the internal heat exchanger through a third circulating pump (P3) and a third valve (V3) and is continuously cooled. Refrigerant in the water storage tank (5) enters the evaporator (7) through a third circulating pump (P3), a ninth valve (V9) and a fifth valve throttling valve (V5) and is sprayed on the surface of a heat exchanger in the evaporator (7) through a nozzle.
The groove type solar heat collection system is a driving heat source of the whole system and provides heat for the double-effect absorption refrigerator and the double-effect three-phase absorption energy storage system. Day mode: the method comprises the steps of closing an eighth valve (V8) on a solution loop consisting of a high-pressure energy storage solution tank (3), a low-pressure energy storage solution tank (4) and an absorber (6), opening a tenth valve (V10) and a ninth valve (V9) between a water storage tank (5) and an evaporator (7), opening a first valve (V1) connected with the high-pressure energy storage solution tank (3), a second valve (V2) connected with the low-pressure energy storage solution tank (4), a third valve (V3) connected with the water storage tank (5), a fourth valve (V4) at a solution outflow end of the absorber (6), a fifth valve throttle valve (V5), and a sixth valve (V6) at a solution inflow end of the absorber (6), wherein the groove type solar heat collector (1) absorbs solar energy to heat conduction oil. When the heat conducting oil reaches the set temperature of the system, a seventh valve (V7) is opened to provide heat for the absorption refrigerator, and the refrigerator starts to work and refrigerate. When the temperature in the oil storage tank (2) exceeds 200 ℃, a seventh valve, a three-way valve (V7) flows into the energy storage system end and is opened, the surplus heat is conveyed to the double-effect three-phase energy accumulator, the first pump (P1) and the second pump (P2) are opened, and the energy accumulator is opened in an energy storage mode. The lithium bromide solution in the high-pressure solution tank (3) is continuously sprayed on a heat source pipe cluster of the solution tank through a first circulating pump (P1), the solution is heated to generate water vapor, the water vapor is generated along with the continuous circulation heating of the solution, the temperature and the concentration of the solution are gradually increased, lithium bromide crystals begin to precipitate after the solution reaches a crystallization state point, and the precipitated crystals are separated from the solution after being filtered by a filter screen; the generated steam enters a low-pressure solution tank (4) to heat the lithium bromide solution, so that the lithium bromide solution is concentrated and crystallized, and the residual solutions in the two solution tanks are continuously sprayed circularly, heated by a heat source and separated out of crystals until the energy storage is finished; the water vapor generated by the high-pressure solution tank (3) is condensed into water after heat release, and enters the water storage tank (5) together with the water vapor generated by the low-pressure solution tank (4), and the water vapor is cooled by cooling water to become liquid refrigerant water and is stored in the water storage tank (5) in a liquid form. Night mode: and (3) opening an eighth valve (V8), a ninth valve (V9) and a tenth valve (V10), closing the first valve (V1), the second valve (V2), the third valve (V3), the fourth valve (V4) and the sixth valve (V6), and stopping the operation of the trough-type solar collector (1). The high-low generator and the condenser (8) of the absorption refrigerator stop running, the first circulating pump (P1), the second circulating pump (P2), the third circulating pump (P3), the fourth circulating pump (P4) and the fifth circulating pump (P5) are still started, and the double-effect three-phase energy accumulator is started to release energy. Liquid refrigerant water in the water storage tank (5) is conveyed to the evaporator (7) by a third circulating pump (P3), and the refrigerant water is evaporated and absorbed into water vapor in the evaporator (7) and enters the absorber (6); the lithium bromide concentrated solution absorbs water vapor from the evaporator (7) to become hot dilute solution, and the dilute solution is respectively conveyed to the two solution tanks by a fourth circulating pump (P4) to continuously dissolve lithium bromide crystals, so that the solution concentration is continuously reduced until the energy release is finished, and the initial state of the energy storage system is recovered.
Furthermore, the energy storage of the system realizes double-effect energy storage on the basis of gas-liquid-solid three-phase energy storage, heat conducting oil in the solar trough collector (1) absorbs solar energy to provide heat for the double-effect three-phase energy storage, and the energy is stored in the high-pressure solution tank (3) and the low-pressure solution tank (4) in a lithium bromide aqueous solution chemical potential energy mode respectively. Specifically, when the three-phase energy storage system stores energy, the solar heat collection medium directly provides heat for the double-effect three-phase energy storage tank, a lithium bromide aqueous solution in the high-pressure solution tank (3) is heated, the generated water vapor continuously heats the lithium bromide aqueous solution in the low-pressure solution tank (4), water separated from the two solution tanks enters the water storage tank (5) to be condensed into liquid, and meanwhile the heat is stored in the energy storage tank in the form of chemical potential energy of the lithium bromide aqueous solution. When the double-effect three-phase energy storage system is started to release energy, liquid water in the water storage tank (5) is subjected to pressure reduction through the throttling device and then enters the evaporator (7), the liquid water is heated by a heat-carrying medium in the heat exchanger in the evaporator (7) to be vaporized, water vapor enters the absorber (6), meanwhile, a lithium bromide concentrated solution in the double-effect three-phase energy storage tank also flows to the absorber (6) to absorb the water vapor from the evaporator (7), and then a diluted lithium bromide solution in the absorber (7) flows back to the lithium bromide crystal precipitated by heating before continuously dissolving in the double-effect three-phase energy storage tank.
The invention is also characterized in that: the double-effect three-phase energy storage and absorption refrigeration system capable of operating all day long is provided, the double-effect three-phase energy storage system is utilized, the energy storage capacity is enhanced, the energy storage density is obviously improved compared with a simple gas-liquid-solid three-phase energy storage mode, energy is stored while refrigeration is carried out in the day, the energy is released to continue refrigeration at night, the system operates all day long, and the solar energy utilization rate is effectively improved.
Advantageous effects
The invention provides a double-effect three-phase energy storage and absorption refrigeration system, wherein the three-phase energy storage technology overcomes the danger brought by the traditional solar absorption heat pump solution crystallization, the load adjustment effect of the energy storage system on a solar heat pump is realized by the high energy storage density of lithium bromide aqueous solution, namely, vapor, liquid and solid, the three-phase energy storage capacity is enhanced, the energy storage density is obviously improved compared with a gas-liquid two-phase energy storage mode, the energy storage density can be improved by more than 50% by 50% of crystallization rate, in other words, the crystallization rate of 50% is reduced by more than half by the volume of an energy storage device, double-effect energy storage is realized on the basis of three-phase energy storage, the system can realize synchronous refrigeration and energy storage, the energy storage is realized in the daytime, the energy is released at night, the system runs all day, the solar energy utilization rate can be further improved, and the double-effect energy storage refrigeration system has high practical value in the field of building energy conservation.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
In the figure: the parts are numbered and named as follows:
1-solar trough type heat collector; 2-an oil storage tank; 3-high pressure energy storage solution tank; 4-low pressure energy storage solution tank; 5, a water storage tank; 6-an absorber; 7-an evaporator; 8, a condenser; 9-high voltage generator; 10-low pressure generator; 11-cooling tower
Detailed Description
The invention is further described with reference to the following figures.
An absorption refrigeration working medium pair lithium bromide-water solution is adopted as an energy storage medium. In the daytime, the eighth valve (V8), the tenth valve (V10) and the ninth valve (V9) are closed, the first valve (V1), the second valve (V2), the third valve (V3), the fourth valve (V4), the fifth valve throttle valve (V5) and the sixth valve (V6) are opened, and the groove type solar heat collector (1) absorbs solar energy to heat the heat conduction oil. When the heat conducting oil reaches the set temperature of the system, a seventh valve (V7) is opened to provide heat for the absorption refrigerator, and the refrigerator starts to work and refrigerate. When the temperature in the oil storage tank (2) exceeds 200 ℃, a seventh valve, a three-way valve (V7) flows into the energy storage system end and is opened, the surplus heat is conveyed to the double-effect three-phase energy accumulator, the first pump (P1) and the second pump (P2) are opened, and the energy accumulator is opened in an energy storage mode. The lithium bromide solution in the high-pressure solution tank (3) is continuously sprayed on a heat source pipe cluster of the solution tank through a first circulating pump (P1), the solution is heated to generate water vapor, the water vapor is generated along with the continuous circulation heating of the solution, the temperature and the concentration of the solution are gradually increased, lithium bromide crystals begin to precipitate after the solution reaches a crystallization state point, and the precipitated crystals are separated from the solution after being filtered by a filter screen; the generated steam enters a low-pressure solution tank (4) to heat the lithium bromide solution, so that the lithium bromide solution is concentrated and crystallized, and the residual solutions in the two solution tanks are continuously sprayed circularly, heated by a heat source and separated out of crystals until the energy storage is finished; the water vapor generated by the high-pressure solution tank (3) is condensed into water after heat release, and enters the water storage tank (5) together with the water vapor generated by the low-pressure solution tank (4), and the water vapor is cooled by cooling water to become liquid refrigerant water and is stored in the water storage tank (5) in a liquid form. And at night, opening the eighth valve (V8), the ninth valve (V9) and the tenth valve (V10), closing the first valve (V1), the second valve (V2), the third valve (V3), the fourth valve (V4) and the sixth valve (V6), and stopping the operation of the trough-type solar collector (1). The high and low generators and the condenser (8) of the absorption refrigerator stop running, and the double-effect three-phase energy accumulator starts an energy release mode. Liquid refrigerant water in the water storage tank (5) is conveyed to the evaporator (7) by a third circulating pump (P3), and the refrigerant water is evaporated and absorbed into water vapor in the evaporator (7) and enters the absorber (6); the lithium bromide concentrated solution absorbs water vapor from the evaporator (7) to become hot dilute solution, and the dilute solution is respectively conveyed to the two solution tanks by a fourth circulating pump (P4) to continuously dissolve lithium bromide crystals, so that the solution concentration is continuously reduced until the energy release is finished, and the initial state of the energy storage system is recovered.
Claims (2)
1. The utility model provides a economic benefits and social benefits three-phase energy storage and absorption formula refrigerating system, this system includes solar trough collector (1), oil storage tank (2), high pressure energy storage solution jar (3), low pressure energy storage solution jar (4), water storage tank (5), absorber (6), evaporimeter (7), condenser (8), high pressure generator (9), low pressure generator (10), cooling tower (11). The solar trough heat collector (1), the oil storage tank (2) and the sixth circulating pump (P6) form a loop for heating heat collecting media, namely heat conducting oil. The oil storage tank (2) is respectively connected with the high-pressure energy storage solution tank (3) and the heat exchanger in the high-pressure generator (9) to form a heat collection medium circulation loop. A seventh valve three-way valve (V7) between the oil storage tank (2) and the high-pressure energy storage solution tank (3) is opened when the temperature of the heat transfer oil reaches 200 ℃ and flows into the energy storage system end. The solution in the high-pressure energy storage solution tank (3) is continuously sprayed on the internal heat exchanger through a first circulating pump (P1) and a first valve (V1). The high-pressure generator (9) is connected with a heat exchanger in the low-pressure generator (10), refrigerant steam generated by the high-pressure generator (9) and refrigerant steam generated by the low-pressure generator (10) enter the condenser (8) through a pipeline connected with the condenser (8) in the heat exchanger in the low-pressure generator (10) and a pipeline above the low-pressure generator (10) respectively after heat exchange, and the cooling tower (11) is connected with the condenser (8) to provide cooling water condensation refrigerant steam. Refrigerant enters the evaporator (7) through a fifth valve throttle valve (V5), and is conveyed by a fifth circulating pump (P5) to be sprayed on the surface of the heat exchanger, so that chilled water conveyed from a cooling area is cooled. The solution heated and concentrated in the high-pressure generator and the low-pressure generator enters an absorber (6) through a heat exchanger and a sixth valve (V6) to absorb refrigerant steam from an evaporator (7), is condensed into dilute solution by cooling water conveyed by a condenser (8), provides circulating power by a fourth circulating pump (P4), and returns to the high-pressure generator (9) and the low-pressure generator (10) after being shunted again. The high-pressure energy storage solution tank (3), the low-pressure energy storage solution tank (4) and the absorber (6) form a solution circulation loop, concentrated solutions in the two solution tanks enter the absorber (6) through an eighth valve (V8) and are sprayed on the surface of the heat exchanger through solution nozzles, and the concentrated solutions absorb water vapor from the evaporator (7) in the absorber (6) to be diluted into dilute solutions. And respectively reflows to the high-pressure solution tank (3) and the low-pressure solution tank (4) through a fourth circulating pump (P4) and a fourth valve (V4). The high-pressure solution tank (3) is connected with a heat exchanger in the low-pressure solution tank (4) through a pipeline, a heat exchange medium is refrigerant steam generated in the high-pressure solution tank (3) and used for heating the solution in the low-pressure energy storage solution tank (4), and the solution is continuously sprayed on the heat exchanger through a second circulating pump (P2) and a third valve (V3). Heat exchange medium releases heat and then enters the water storage tank (5) through a pipeline, steam generated after solution in the low-pressure energy storage solution tank (4) is heated also enters the water storage tank (5) through an upper pipeline, all cooling water circulated from the cooling tower (11) is condensed into liquid, the cooling tower (11) is connected with a heat exchanger in the water storage tank (5) through a pipeline, and liquid water in the water storage tank (5) is sprayed on the internal heat exchanger through a third circulating pump (P3) and a third valve (V3) and is continuously cooled. Refrigerant in the water storage tank (5) enters the evaporator (7) through a third circulating pump (P3), a ninth valve (V9) and a fifth valve throttling valve (V5) and is sprayed on the surface of a heat exchanger in the evaporator (7) through a nozzle.
2. The system of claim 1, wherein: the method adopts an absorption refrigeration working medium pair lithium bromide aqueous solution as an energy storage medium, adopts an absorption refrigeration working medium pair lithium bromide-aqueous solution as an energy storage medium, and has a daytime mode: the method comprises the steps of closing an eighth valve (V8) on a solution loop consisting of a high-pressure energy storage solution tank (3), a low-pressure energy storage solution tank (4) and an absorber (6), opening a tenth valve (V10) and a ninth valve (V9) between a water storage tank (5) and an evaporator (7), opening a first valve (V1) connected with the high-pressure energy storage solution tank (3), a second valve (V2) connected with the low-pressure energy storage solution tank (4), a third valve (V3) connected with the water storage tank (5), a fourth valve (V4) at a solution outflow end of the absorber (6), a fifth valve throttle valve (V5), and a sixth valve (V6) at a solution inflow end of the absorber (6), wherein the groove type solar heat collector (1) absorbs solar energy to heat conduction oil. When the heat conducting oil reaches the set temperature of the system, a seventh valve (V7) is opened to provide heat for the absorption refrigerator, and the refrigerator starts to work and refrigerate. When the temperature in the oil storage tank (2) exceeds 200 ℃, a seventh valve, a three-way valve (V7) flows into the energy storage system end and is opened, the surplus heat is conveyed to the double-effect three-phase energy accumulator, the first pump (P1) and the second pump (P2) are opened, and the energy accumulator is opened in an energy storage mode. The lithium bromide solution in the high-pressure solution tank (3) is continuously sprayed on a heat source pipe cluster of the solution tank through a first circulating pump (P1), the solution is heated to generate water vapor, the water vapor is generated along with the continuous circulation heating of the solution, the temperature and the concentration of the solution are gradually increased, lithium bromide crystals begin to precipitate after the solution reaches a crystallization state point, and the precipitated crystals are separated from the solution after being filtered by a filter screen; the generated steam enters a low-pressure solution tank (4) to heat the lithium bromide solution, so that the lithium bromide solution is concentrated and crystallized, and the residual solutions in the two solution tanks are continuously sprayed circularly, heated by a heat source and separated out of crystals until the energy storage is finished; the water vapor generated by the high-pressure solution tank (3) is condensed into water after heat release, and enters the water storage tank (5) together with the water vapor generated by the low-pressure solution tank (4), and the water vapor is cooled by cooling water to become liquid refrigerant water and is stored in the water storage tank (5) in a liquid form. Night mode: and (3) opening an eighth valve (V8), a ninth valve (V9) and a tenth valve (V10), closing the first valve (V1), the second valve (V2), the third valve (V3), the fourth valve (V4) and the sixth valve (V6), and stopping the operation of the trough-type solar collector (1). The high-low generator and the condenser (8) of the absorption refrigerator stop running, the first circulating pump (P1), the second circulating pump (P2), the third circulating pump (P3), the fourth circulating pump (P4) and the fifth circulating pump (P5) are started, and the energy release mode of the double-effect three-phase energy accumulator is started. Liquid refrigerant water in the water storage tank (5) is conveyed to the evaporator (7) by a third circulating pump (P3), and the refrigerant water is evaporated and absorbed into water vapor in the evaporator (7) and enters the absorber (6); the lithium bromide concentrated solution absorbs water vapor from the evaporator (7) to become hot dilute solution, and the dilute solution is respectively conveyed to the two solution tanks by a fourth circulating pump (P4) to continuously dissolve lithium bromide crystals, so that the solution concentration is continuously reduced until the energy release is finished, and the initial state of the energy storage system is recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110708614.5A CN113531944B (en) | 2021-06-25 | 2021-06-25 | Double-effect three-phase energy storage and absorption type refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110708614.5A CN113531944B (en) | 2021-06-25 | 2021-06-25 | Double-effect three-phase energy storage and absorption type refrigerating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113531944A true CN113531944A (en) | 2021-10-22 |
| CN113531944B CN113531944B (en) | 2022-09-23 |
Family
ID=78096775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110708614.5A Active CN113531944B (en) | 2021-06-25 | 2021-06-25 | Double-effect three-phase energy storage and absorption type refrigerating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113531944B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115218531A (en) * | 2022-07-27 | 2022-10-21 | 哈尔滨工业大学 | Lithium bromide crystallization energy storage heat pump system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201363960Y (en) * | 2009-03-16 | 2009-12-16 | 浙江工商大学 | Solar energy and engine waste heat double-energy refrigeration air conditioner for automobile |
| CN104374025A (en) * | 2014-11-17 | 2015-02-25 | 北京工业大学 | Three-phase energy storage method of solar air conditioner |
| US9702597B1 (en) * | 2016-02-18 | 2017-07-11 | King Fahd University Of Petroleum And Minerals | System and method for preventing absorbent crystallization in a continuously operating solar-powered absorption cooling system with hybrid storage |
| CN207091373U (en) * | 2017-07-28 | 2018-03-13 | 北京神源环保有限公司 | A kind of multistage hold over system |
| CN108106046A (en) * | 2017-12-18 | 2018-06-01 | 北京工业大学 | A kind of solar energy double effect absorption type heat pump system of combination three-phase accumulation of energy |
| CN109425146A (en) * | 2017-07-19 | 2019-03-05 | 成都博昱新能源有限公司 | A kind of absorption solar energy air-conditioning of slot type thermal-arrest |
| CN110296452A (en) * | 2019-08-02 | 2019-10-01 | 河南理工大学 | A kind of multi-level phase change heat storage type solar heating, hot-water supply system |
| CN112503782A (en) * | 2021-01-18 | 2021-03-16 | 南京工业大学 | Oil field waste heat recovery system and method applying solar energy and lithium bromide heat pump |
-
2021
- 2021-06-25 CN CN202110708614.5A patent/CN113531944B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201363960Y (en) * | 2009-03-16 | 2009-12-16 | 浙江工商大学 | Solar energy and engine waste heat double-energy refrigeration air conditioner for automobile |
| CN104374025A (en) * | 2014-11-17 | 2015-02-25 | 北京工业大学 | Three-phase energy storage method of solar air conditioner |
| US9702597B1 (en) * | 2016-02-18 | 2017-07-11 | King Fahd University Of Petroleum And Minerals | System and method for preventing absorbent crystallization in a continuously operating solar-powered absorption cooling system with hybrid storage |
| CN109425146A (en) * | 2017-07-19 | 2019-03-05 | 成都博昱新能源有限公司 | A kind of absorption solar energy air-conditioning of slot type thermal-arrest |
| CN207091373U (en) * | 2017-07-28 | 2018-03-13 | 北京神源环保有限公司 | A kind of multistage hold over system |
| CN108106046A (en) * | 2017-12-18 | 2018-06-01 | 北京工业大学 | A kind of solar energy double effect absorption type heat pump system of combination three-phase accumulation of energy |
| CN110296452A (en) * | 2019-08-02 | 2019-10-01 | 河南理工大学 | A kind of multi-level phase change heat storage type solar heating, hot-water supply system |
| CN112503782A (en) * | 2021-01-18 | 2021-03-16 | 南京工业大学 | Oil field waste heat recovery system and method applying solar energy and lithium bromide heat pump |
Non-Patent Citations (1)
| Title |
|---|
| 蒋明贺，毕月虹，刘肖，陈杰: "溴化锂-水工质对的三相蓄能系统热力学性能分析", 《制冷与空调》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115218531A (en) * | 2022-07-27 | 2022-10-21 | 哈尔滨工业大学 | Lithium bromide crystallization energy storage heat pump system |
| CN115218531B (en) * | 2022-07-27 | 2024-03-29 | 哈尔滨工业大学 | Lithium bromide crystallization energy storage heat pump system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113531944B (en) | 2022-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107091542B (en) | A kind of coupling circulation system and control method for solar energy thermal-power-generating | |
| CN103983042B (en) | The indoor cold-hot integrated system of a kind of solar energy | |
| CN101566406A (en) | Solar photovoltaic and photothermal cogeneration type hybrid heat pump | |
| CN201819480U (en) | High-efficiency and energy-saving heat pump device | |
| CN105222404A (en) | One utilizes solar energy-air energy heat pump | |
| CN110118448B (en) | Heat storage cold storage type gas auxiliary solar energy absorption type ammonia water cooling system | |
| CN101556095A (en) | Low-grade energy driving and mechanical work driving combined heat pump or refrigerating system | |
| CN103292393A (en) | Solar photovoltaic photo-thermal complex conditioner | |
| CN104633981A (en) | Lithium bromide-water absorbing type refrigeration device based on photovoltaic photo thermal and electrodialysis | |
| CN103868278A (en) | Low-grade energy driving CO2 absorption type combined cooling heating and power system | |
| CN109974326A (en) | It is a kind of to evaporate cold solar energy and air heat source combined heat-pump recuperation of heat unit | |
| CN105972858A (en) | System and method for supplying energy and storing energy by utilizing waste heat of air compressor | |
| CN104457019A (en) | Conventional compression heat pump/two-stage absorption compound refrigerating system with internal heat recycling | |
| CN103438605B (en) | Absorb and heat exchange type Absorption Cooling System occurs | |
| CN113531944B (en) | Double-effect three-phase energy storage and absorption type refrigerating system | |
| CN102645050A (en) | Ammonia water absorbing-type refrigeration system and method using concentration-adjustable working medium | |
| CN201740309U (en) | Solar energy and geothermy comprehensive utilization lithium bromide absorption heat pump | |
| CN103528258B (en) | Mixed working medium variable concentration volume adjusting absorption heat pump system | |
| CN113701393B (en) | Solar single/double-effect switching absorption refrigeration system adopting membrane accumulator | |
| CN203629116U (en) | Variable concentration volume control absorption type heat pump system for mixed working medium | |
| CN108317769B (en) | thermoelectric synergistic energy storage type absorption-adsorption cascade multi-effect refrigeration system | |
| CN103075835B (en) | Novel absorption type refrigeration and power-generation combining device | |
| CN202361696U (en) | Heat pump circulating system and evaporation system | |
| CN106224186B (en) | A kind of CO with accumulation of heat and refrigeration2Brayton cycle solar-thermal generating system | |
| CN213811249U (en) | Power plant waste heat ice making system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |