CN116105386A - Photo-thermal composite ammonia absorption type multi-energy combined supply system - Google Patents
Photo-thermal composite ammonia absorption type multi-energy combined supply system Download PDFInfo
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- CN116105386A CN116105386A CN202310029278.0A CN202310029278A CN116105386A CN 116105386 A CN116105386 A CN 116105386A CN 202310029278 A CN202310029278 A CN 202310029278A CN 116105386 A CN116105386 A CN 116105386A
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/02—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass involving the use of working media other than water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D18/00—Small-scale combined heat and power [CHP] generation systems specially adapted for domestic heating, space heating or domestic hot-water supply
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2101/00—Electric generators of small-scale CHP systems
- F24D2101/10—Gas turbines; Steam engines or steam turbines; Water turbines, e.g. located in water pipes
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Abstract
The invention provides a photo-thermal composite ammonia absorption type multi-energy co-generation system, and relates to the technical field of thermodynamic systems. The photo-thermal composite ammonia absorption type multi-energy combined supply system comprises a heat collection and storage subsystem, an energy storage subsystem, a refrigeration subsystem and a power generation subsystem, wherein the heat collection and storage subsystem is suitable for heating a heat conduction medium by utilizing solar energy so as to store a large amount of heat in the heat conduction medium and can heat by utilizing part of heat; the energy storage subsystem is suitable for heating and separating the concentrated ammonia water solution by utilizing the heat of the heat conducting medium to generate the diluted ammonia water solution and liquid ammonia; the refrigerating subsystem is suitable for absorbing heat of the cold storage medium by utilizing the liquid ammonia throttling expansion process and storing cold energy; the power generation subsystem is suitable for heating liquid ammonia by utilizing heat of the heat conducting medium to generate high-pressure ammonia steam, and driving the generator set to generate power by utilizing the high-pressure ammonia steam. The photo-thermal composite ammonia absorption type multi-energy combined supply system provided by the invention can realize combined supply of cold energy, heat energy and electric energy by utilizing renewable energy sources, and improves the energy utilization rate.
Description
Technical Field
The invention relates to the technical field of thermodynamic systems, in particular to a photo-thermal composite ammonia absorption type multi-energy combined supply system.
Background
Renewable energy sources are applied to a plurality of technical fields such as power generation, heating, refrigeration and the like, and are beneficial to reducing carbon emission and realizing green development.
Due to the fact that the renewable energy source is intermittently and unstably utilized due to various factors such as geographical environment, resource conditions and the like, the development of corresponding energy storage technology becomes an effective way for realizing continuous utilization of the renewable energy source. Meanwhile, thermodynamic systems capable of realizing combined supply of cold energy, heat energy and electric energy are also gaining more importance. In some remote areas, the heat supply network cannot cover, the power supply is relatively tension, and the heating and cooling by adopting an electric driving mode have great difficulty. Therefore, the development of a small-scale combined cooling heating and power system based on renewable energy sources has important significance.
Disclosure of Invention
The present invention is directed to solving at least one of the technical problems existing in the related art. Therefore, the invention provides a photo-thermal composite ammonia absorption type multi-energy combined supply system, which can realize the combined supply of cold energy, heat energy and electric energy by utilizing renewable energy sources and improve the energy utilization rate.
The embodiment of the invention provides a photo-thermal composite ammonia absorption type multi-energy co-supply system, which comprises:
the solar heat collection and storage system comprises a heat collection and storage subsystem, wherein a heat conduction medium is arranged in the heat collection and storage subsystem, and the heat collection and storage subsystem is suitable for heating the heat conduction medium by utilizing solar energy;
the energy storage subsystem is provided with a concentrated ammonia water solution, and is suitable for heating the concentrated ammonia water solution by utilizing the heat of the heat conducting medium and separating to generate a dilute ammonia water solution and liquid ammonia;
the refrigeration subsystem is provided with a cold storage medium and is suitable for absorbing heat of the cold storage medium by utilizing the liquid ammonia through throttling expansion;
the power generation subsystem comprises a power generation unit, and is suitable for heating the liquid ammonia by utilizing the heat of the heat conducting medium to generate high-pressure ammonia steam and driving the power generation unit to generate power by utilizing the high-pressure ammonia steam.
According to the photo-thermal composite ammonia absorption type multi-energy co-generation system provided by the embodiment of the invention, the heat collection and storage subsystem, the energy storage subsystem, the refrigeration subsystem and the power generation subsystem are integrated together, the photo-thermal collection technology is adopted to enrich solar photo-thermal, and heat exchange is carried out between the heat conduction, heat storage and cold storage working mediums, so that the heating and refrigerating requirements of users can be met, and energy storage and electric power output can be realized. Specifically, the heat collecting and storing subsystem uses solar energy as heat collecting energy, the collected heat is used for heating the heat conducting medium, and a large amount of heat is stored in the heated heat conducting medium, wherein part of the heat in the heat conducting medium can be transferred to the heating and storing medium, so that the heating and storing medium can be heated at a high temperature, a user can heat the heating and storing medium to meet the heating requirement, and the other part of the heat in the heat conducting medium can drive the operation of the photo-thermal composite ammonia absorption type multi-energy combined supply system. The energy storage subsystem can heat the concentrated ammonia water solution by utilizing the heat of the heat conducting medium, and the concentrated ammonia water is separated into liquid ammonia and a diluted ammonia water solution after being heated and stored. In the refrigerating subsystem, the stored liquid ammonia absorbs the heat of a cold storage medium through throttling expansion, so that the temperature of the cold storage working medium is reduced, the cold is stored, meanwhile, the liquid ammonia is changed into ammonia steam after heat exchange and is mixed with a dilute ammonia water solution to generate a concentrated ammonia water solution again to be stored in the energy storage subsystem, and the next refrigerating cycle is participated. In the power generation subsystem, the ammonia vapor is generated after the pressurized heat exchange of the liquid ammonia, and the ammonia vapor is utilized to drive a generator set to generate power. The ammonia steam can be mixed with the dilute ammonia water solution again after heat exchange, and the generated concentrated ammonia water solution is stored in the energy storage subsystem to participate in the next power generation. Therefore, by applying the photo-thermal composite ammonia absorption type multi-energy combined supply system provided by the embodiment of the invention, photo-thermal resources can be fully utilized, comprehensive cascade utilization of the photo-thermal resources is promoted, and meanwhile, the requirements of cold energy, heat energy and electric energy multi-energy combined supply in the intelligent micro-energy Internet can be met.
According to one embodiment of the invention, the heat collection and storage subsystem comprises a solar heat collection mirror field, a high-temperature heat conduction oil tank, a heat storage water tank and a low-temperature heat conduction oil tank which are sequentially connected, wherein the heat conduction medium is stored in the high-temperature heat conduction oil tank and the low-temperature heat conduction oil tank, and a heating heat storage medium is arranged in the heat storage water tank.
According to one embodiment of the invention, the energy storage subsystem comprises a concentrated ammonia water storage tank, a generator, a separator, a condenser and a liquid ammonia storage tank which are connected in sequence, wherein the generator is connected with the heat collection and storage subsystem;
the energy storage subsystem further comprises a dilute ammonia water storage tank, and the dilute ammonia water storage tank is connected with the separator;
the concentrated aqueous ammonia solution is stored in the concentrated aqueous ammonia storage tank, the diluted aqueous ammonia solution is stored in the diluted aqueous ammonia storage tank, and the liquid ammonia is stored in the liquid ammonia storage tank.
According to one embodiment of the invention, the refrigeration subsystem comprises an evaporator, an absorber and a solution exchanger which are connected in sequence, wherein the evaporator is connected with the liquid ammonia storage tank;
the refrigeration subsystem further comprises a cold accumulation water tank, the cold accumulation water tank is connected with the evaporator, and the cold accumulation medium is stored in the cold accumulation water tank.
According to one embodiment of the invention, the generator set comprises a supercharging device, a turbine expansion unit and a generator, wherein the turbine expansion unit is connected with the liquid ammonia storage tank, the supercharging device is connected with the liquid ammonia storage tank, and the generator is connected with the turbine expansion unit;
the supercharging device is also connected with the heat collection and storage subsystem.
According to one embodiment of the invention, the photo-thermal composite ammonia absorption type multi-energy co-generation system further comprises a cooling tower, wherein the cooling tower is connected with the condenser and the absorber.
According to one embodiment of the invention, a first connecting valve is arranged between the generator and the heat collecting and accumulating subsystem.
According to one embodiment of the invention, a second connecting valve is arranged between the evaporator and the liquid ammonia storage tank.
According to one embodiment of the invention, a third connecting valve is arranged between the supercharging device and the liquid ammonia storage tank, a fourth connecting valve is arranged between the supercharging device and the heat collecting and storing subsystem, and a fifth connecting valve is arranged between the turbine expansion unit and the liquid ammonia storage tank.
According to one embodiment of the invention, the heat collecting and storing subsystem further comprises a heat conducting oil pipeline, and the heat conducting medium flows in the heat conducting oil pipeline.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a photo-thermal composite ammonia absorption type multi-energy co-generation system according to an embodiment of the present invention.
Reference numerals:
10. a heat collection and storage subsystem; 110. a solar heat collection mirror field, 120, and a high-temperature heat conduction oil tank; 130. a thermal storage tank; 140. a low-temperature heat conduction oil tank; 151. a first connecting valve; 152. a second connecting valve; 153. a third connecting valve; 154. a fourth connecting valve; 155. a fifth connecting valve; 160. a heat conduction oil pipeline;
20. an energy storage subsystem; 210. a concentrated ammonia water storage tank; 220. a generator; 230. a separator; 240. a condenser; 250. a liquid ammonia storage tank; 260. a dilute ammonia water storage tank;
30. a refrigeration subsystem; 310. an evaporator; 320. an absorber; 330. a solution exchanger; 340. cold-storage water tank;
40. a power generation subsystem; 410. a supercharging device; 420. a turbine expansion unit; 430. a generator;
510. and (5) a cooling tower.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
As shown in fig. 1, an embodiment of the present invention provides a photo-thermal composite ammonia absorption type multi-energy co-generation system, which comprises a heat collection and storage subsystem 10, an energy storage subsystem 20, a refrigeration subsystem 30 and a power generation subsystem 40, wherein a heat-conducting medium is arranged in the heat collection and storage subsystem 10, and the heat collection and storage subsystem 10 is suitable for heating the heat-conducting medium by solar energy; the energy storage subsystem 20 is provided with a concentrated ammonia water solution, and the energy storage subsystem 20 is suitable for heating the concentrated ammonia water solution by utilizing the heat of the heat conducting medium and separating to generate a dilute ammonia water solution and liquid ammonia; the refrigeration subsystem 30 is provided with a cold storage medium, and the refrigeration subsystem 30 is suitable for absorbing heat of the cold storage medium by utilizing liquid ammonia through throttling expansion; the power generation subsystem 40 comprises a set of power generators 430, and the power generation subsystem 40 is adapted to heat liquid ammonia by using heat of the heat conducting medium to generate high-pressure ammonia vapor, and drive the set of power generators 430 to generate power by using the high-pressure ammonia vapor.
According to the photo-thermal composite ammonia absorption type multi-energy combined supply system provided by the embodiment of the invention, the heat collection and storage subsystem 10, the energy storage subsystem 20, the refrigeration subsystem 30 and the power generation subsystem 40 are integrated together, the photo-thermal heat collection technology is adopted to enrich solar photo-heat, and heat exchange is carried out between heat conduction, heat storage and cold storage working media, so that the heating and cooling requirements of users can be met, and the energy storage and the power output can be realized. Specifically, the heat collecting and storing subsystem 10 uses solar energy as a heat collecting energy source, the collected heat is used for heating a heat conducting medium, a large amount of heat is stored in the heated heat conducting medium, part of the heat in the heat conducting medium can be transferred to the heating and storing medium, high-temperature heating of the heating and storing medium is achieved, a user can heat the heating and storing medium to meet heating requirements, and the other part of the heat in the heat conducting medium can drive the operation of the photo-thermal composite ammonia absorption type multi-energy combined supply system. The energy storage subsystem 20 can heat the concentrated ammonia water solution by utilizing the heat of the heat conducting medium, and the concentrated ammonia water is separated into liquid ammonia and a diluted ammonia water solution after being heated and stored. In the refrigeration subsystem 30, the stored liquid ammonia absorbs the heat of the cold storage medium through throttling expansion, so that the temperature of the cold storage working medium is reduced, the cold is stored, meanwhile, the liquid ammonia is changed into ammonia vapor after heat exchange, and is mixed with a dilute ammonia water solution to generate a concentrated ammonia water solution again to be stored in the energy storage subsystem 20 to participate in the next refrigeration cycle. In the power generation subsystem 40, the liquid ammonia is subjected to pressurization and heat exchange to generate ammonia vapor, and the ammonia vapor is utilized to drive the generator 430 to generate power. The ammonia vapor can be mixed with the diluted ammonia water solution again after heat exchange, and the generated concentrated ammonia water solution is stored in the energy storage subsystem 20 to participate in the next power generation. Therefore, by applying the photo-thermal composite ammonia absorption type multi-energy combined supply system provided by the embodiment of the invention, photo-thermal resources can be fully utilized, comprehensive cascade utilization of the photo-thermal resources is promoted, and meanwhile, the requirements of cold energy, heat energy and electric energy multi-energy combined supply in the intelligent micro-energy Internet can be met.
As shown in fig. 1, in the embodiment of the present invention, the heat collecting and storing subsystem 10 includes a solar heat collecting mirror field 110, a high temperature heat conducting oil tank 120, a heat storing water tank 130 and a low temperature heat conducting oil tank 140, which are sequentially connected, the heat conducting medium is stored in the high temperature heat conducting oil tank 120 and the low temperature heat conducting oil tank 140, and the heat storing water tank 130 is provided with a heating heat storing medium.
As shown in fig. 1, in the embodiment of the present invention, a first connection valve 151 is provided between the generator 220 and the heat collecting and storing subsystem 10.
As shown in fig. 1, in the embodiment of the present invention, a second connection valve 152 is provided between the vaporizer 310 and the liquid ammonia tank 250.
As shown in fig. 1, in the embodiment of the present invention, a third connection valve 153 is disposed between the pressurizing device 410 and the liquid ammonia storage tank 250, a fourth connection valve 154 is disposed between the pressurizing device 410 and the heat collecting and storing subsystem 10, and a fifth connection valve 155 is disposed between the turbo-expander set 420 and the liquid ammonia storage tank 250.
As shown in fig. 1, in the embodiment of the present invention, the heat collecting and storing subsystem 10 further includes a heat conducting oil line 160, and the heat conducting medium circulates in the heat conducting oil line 160.
The solar heat collecting mirror field 110 is a trough type solar heat collecting device, which is connected to the low temperature heat conducting oil tank 140 and the high temperature heat conducting oil tank 120, and the collected heat is used for heating a heat conducting medium such as heat conducting oil, and can be heated to 250 ℃ at most, and a large amount of heat is stored in the high temperature heat conducting oil tank 120. The heat transfer oil and the heating and heat storage medium such as water in the heat storage tank 130 can be used for heat exchange to heat water, a user can heat the heated water to meet the heat supply requirement of the user, and the water temperature of the heat storage tank 130 is generally 85-90 ℃.
In combination with the above-described technical features, specifically, when the system performs the heat storage mode, the fourth connection valve 154 between the conduction oil line 160 and the pressurizing device 410, the first connection valve 151 between the conduction oil line 160 and the generator 220 are closed, and the connection valve between the conduction oil line 160 and the heat storage tank 130 is opened. The heat conduction oil pump is started, so that the heat conduction oil in the system is gradually heated by the collected solar energy, the temperature of the heat conduction oil is increased to store heat, part of the heat conduction oil can be used for heating water in the heat storage water tank 130, and a user can heat through the heated water. The heat transfer oil may be heated up to 250 c and the water temperature of the thermal storage tank 130 is typically 85 c to 90 c.
As shown in fig. 1, in the embodiment of the present invention, the energy storage subsystem 20 includes a concentrated ammonia water storage tank 210, a generator 220, a separator 230, a condenser 240, and a liquid ammonia storage tank 250, which are sequentially connected, and the generator 220 is connected with the heat collecting and storing subsystem 10;
the energy storage subsystem 20 further includes a dilute ammonia storage tank 260, the dilute ammonia storage tank 260 being connected to the separator 230;
the concentrated aqueous ammonia solution is stored in the concentrated aqueous ammonia tank 210, the dilute aqueous ammonia solution is stored in the dilute aqueous ammonia tank 260, and the liquid ammonia is stored in the liquid ammonia tank 250.
As shown in fig. 1, in the embodiment of the present invention, the photo-thermal composite ammonia absorption type multi-energy co-generation system further includes a cooling tower 510, and the cooling tower 510 is connected with the condenser 240 and the absorber 320.
In the energy storage subsystem 20 using ammonia as a working medium, the concentrated ammonia water solution is heated in the evaporator 310, and heat required for heating is provided by heat conduction oil. The heated ammonia solution enters a separator 230 for rectification separation, and ammonia steam enters a condenser 240 for cooling by cooling water to become high-concentration low-pressure pure ammonia solution, and then enters a liquid ammonia storage tank 250 for storage.
In combination with the above-described technical features, specifically, when the system performs the energy storage mode, the connection valve between the conduction oil line 160 and the thermal storage tank 130, the fourth connection valve 154 between the conduction oil line 160 and the pressurizing device 410 are closed, and the first connection valve 151 between the conduction oil line 160 and the generator 220 is opened. The ammonia solution pump is started, the ammonia solution enters the generator 220 from the concentrated ammonia water storage tank 210, and is heated by the high-temperature heat conduction oil of the heat conduction oil pipeline 160, and the heating temperature is generally about 140 ℃. The heated ammonia water solution enters the separator 230 for rectification separation, and ammonia steam at the top enters the condenser 240, is cooled by cooling water provided by the cooling tower 510, and enters the liquid ammonia storage tank 250 for storage. The dilute aqueous ammonia solution at the bottom of separator 230 enters dilute aqueous ammonia storage tank 260. The concentration of the liquid ammonia entering the liquid ammonia storage tank 250 is 99%, the temperature is 25-30 ℃, and the pressure is 1.0-1.2MPa.
As shown in fig. 1, in the embodiment of the present invention, the refrigeration subsystem 30 includes an evaporator 310, an absorber 320 and a solution exchanger 330 connected in sequence, the evaporator 310 being connected to a liquid ammonia tank 250;
the refrigeration subsystem 30 further includes a cool storage tank 340, the cool storage tank 340 being connected to the evaporator 310, the cool storage medium being stored in the cool storage tank 340.
In the absorption refrigeration system, the ammonia solution after throttling and depressurization enters the evaporator 310 to be expanded into ammonia vapor, and in the process, the ammonia vapor absorbs external heat to reduce the temperature of the ammonia vapor, and the cold energy is stored in the cold storage water tank 340 through the chilled water so as to meet the cooling requirement of a user. The expanded ammonia vapor enters absorber 320 and is absorbed by the dilute ammonia solution to become a concentrated ammonia solution, and then enters generator 220 for heating and the next cycle. In the solution exchanger 330, the concentrated ammonia solution flowing out of the absorber 320 exchanges heat with the dilute ammonia solution flowing out of the separator 230 to improve energy utilization efficiency.
In combination with the above-described technical features, specifically, when the system performs the cold storage mode, the third connection valve 153 between the liquid ammonia storage tank 250 and the pressurizing device 410, the fifth connection valve 155 between the liquid ammonia storage tank 250 and the turbo-expander set 420 are closed, the second connection valve 152 between the liquid ammonia storage tank 250 and the evaporator 310 is opened, and the outlet valve of the dilute ammonia storage tank 260 is opened. At this time, the liquid ammonia flows out from the bottom of the liquid ammonia storage tank 250, is throttled and depressurized, and then enters the evaporator 310 to expand, absorbs heat of the coolant water from the coolant water storage tank 340, and stores cold. The operating pressure in the evaporator 310 is typically 0.3-0.4MPa. The expanded ammonia vapor enters the absorber 320, is absorbed by the dilute ammonia water flowing out of the dilute ammonia water tank, becomes a concentrated ammonia water solution, and enters the concentrated ammonia water storage tank 210 after heat exchange with the dilute ammonia water solution flowing into the absorber 320 in the solution exchanger 330.
As shown in fig. 1, in the embodiment of the present invention, the generator 430 includes a pressurizing device 410, a turboexpander 420, and a generator 430, the turboexpander 420 is connected to the liquid ammonia storage tank 250, the pressurizing device 410 is connected to the liquid ammonia storage tank 250, and the generator 430 is connected to the turboexpander 420;
the supercharging device 410 is also connected to the heat collection and storage subsystem 10.
In the power generation system, pure ammonia solution flows out from the bottom of the liquid ammonia storage tank 250, changes into ammonia steam after heat exchange by the pressurizing device 410, and then enters the upper part of the liquid ammonia storage tank 250 to realize pressurization of the liquid ammonia tank. The heat required by the supercharging device 410 is derived from the conduction oil of the heat collection and storage subsystem 10. The pressurized high-pressure ammonia steam enters the turbine expansion unit 420 to do work, drives the generator 430 to generate power, and the exhaust steam enters the absorber 320 to enter the next cycle.
In combination with the above-described technical features, specifically, when the system performs the power generation mode, the second connection valve 152 between the liquid ammonia tank 250 and the vaporizer 310 is closed, the third connection valve 153 between the liquid ammonia tank 250 and the pressurizing device 410 is opened, the fourth connection valve 154 between the heat-conducting oil line 160 and the pressurizing device 410 is opened, and the outlet valve of the dilute ammonia tank 260 is opened. At this time, the liquid ammonia flows out from the bottom of the liquid ammonia storage tank 250 and enters the pressurizing device 410, is heated by the high-temperature heat conduction oil from the heat collection and storage subsystem 10 therein, becomes ammonia vapor and enters the top of the liquid ammonia storage tank 250, and completes pressurizing the liquid ammonia storage tank 250. After the pressure of the liquid ammonia storage tank 250 reaches 3MPa, a fifth connecting valve 155 between the liquid ammonia storage tank 250 and the turbine expansion unit 420 is opened, and high-pressure ammonia steam enters the turbine expansion unit 420 to perform expansion work and drive a generator 430 group to generate electricity. The expanded exhaust steam enters the absorber 320 and is absorbed by the dilute ammonia solution to become the concentrated ammonia solution, and the concentrated ammonia solution enters the concentrated ammonia storage tank 210.
The photo-thermal composite ammonia absorption type multi-energy co-generation system provided by the embodiment of the invention can also simultaneously operate two or more of a heat storage mode, an energy storage mode, a cold storage mode and a power generation mode.
For example, when the thermal storage mode and the energy storage mode are simultaneously operated, the fourth connection valve 154 between the conduction oil line 160 and the pressurizing means 410 is closed, and the connection valve between the conduction oil line 160 and the thermal storage tank 130 and the first connection valve 151 between the conduction oil line 160 and the generator 220 are opened. At this time, the heat transfer oil of the heat collecting and storing subsystem 10 can heat the water in the heat storing water tank 130 to complete heating and storing heat, and can heat the concentrated ammonia water solution in the generator 220 to complete storing energy.
When the heat storage mode and the power generation mode are simultaneously operated, the first connection valve 151 between the heat conduction oil pipe 160 and the generator 220 is closed, and the connection valve between the heat conduction oil pipe 160 and the heat storage tank 130 and the fourth connection valve 154 between the heat conduction oil pipe 160 and the pressurizing device 410 are opened. At this time, the heat transfer oil of the heat collecting and storing subsystem 10 can heat the water in the heat storing tank 130 to complete heating and storing, or can heat the liquid ammonia in the pressurizing device 410 to become steam to achieve the purpose of pressurizing the liquid ammonia storage tank 250.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A photo-thermal composite ammonia absorption type multi-energy co-generation system, comprising:
the solar heat collection and storage system comprises a heat collection and storage subsystem, wherein a heat conduction medium is arranged in the heat collection and storage subsystem, and the heat collection and storage subsystem is suitable for heating the heat conduction medium by utilizing solar energy;
the energy storage subsystem is provided with a concentrated ammonia water solution, and is suitable for heating the concentrated ammonia water solution by utilizing the heat of the heat conducting medium and separating to generate a dilute ammonia water solution and liquid ammonia;
the refrigeration subsystem is provided with a cold storage medium and is suitable for absorbing heat of the cold storage medium by utilizing the liquid ammonia through throttling expansion;
the power generation subsystem comprises a power generation unit, and is suitable for heating the liquid ammonia by utilizing the heat of the heat conducting medium to generate high-pressure ammonia steam and driving the power generation unit to generate power by utilizing the high-pressure ammonia steam.
2. The photo-thermal composite ammonia absorption type multi-energy co-generation system according to claim 1, wherein the heat collection and storage subsystem comprises a solar heat collection mirror field, a high-temperature heat conduction oil tank, a heat storage water tank and a low-temperature heat conduction oil tank which are sequentially connected, the heat conduction medium is stored in the high-temperature heat conduction oil tank and the low-temperature heat conduction oil tank, and a heating heat storage medium is arranged in the heat storage water tank.
3. The photo-thermal composite ammonia absorption type multi-energy co-generation system according to claim 1, wherein the energy storage subsystem comprises a concentrated ammonia water storage tank, a generator, a separator, a condenser and a liquid ammonia storage tank which are sequentially connected, and the generator is connected with the heat collection and storage subsystem;
the energy storage subsystem further comprises a dilute ammonia water storage tank, and the dilute ammonia water storage tank is connected with the separator;
the concentrated aqueous ammonia solution is stored in the concentrated aqueous ammonia storage tank, the diluted aqueous ammonia solution is stored in the diluted aqueous ammonia storage tank, and the liquid ammonia is stored in the liquid ammonia storage tank.
4. The photo-thermal composite ammonia absorption type multi-energy co-generation system according to claim 3, wherein the refrigeration subsystem comprises an evaporator, an absorber and a solution exchanger which are sequentially connected, and the evaporator is connected with the liquid ammonia storage tank;
the refrigeration subsystem further comprises a cold accumulation water tank, the cold accumulation water tank is connected with the evaporator, and the cold accumulation medium is stored in the cold accumulation water tank.
5. The photo-thermal composite ammonia absorption type multi-energy combined supply system according to claim 3, wherein the generator set comprises a supercharging device, a turboexpander set and a generator, the turboexpander set is connected with the liquid ammonia storage tank, the supercharging device is connected with the liquid ammonia storage tank, and the generator is connected with the turboexpander set;
the supercharging device is also connected with the heat collection and storage subsystem.
6. The photo-thermal composite ammonia absorption type multi-energy co-generation system according to claim 4, further comprising a cooling tower connected with the condenser and the absorber.
7. The photo-thermal composite ammonia absorption type multi-energy co-generation system according to claim 3, wherein a first connecting valve is arranged between the generator and the heat collection and storage subsystem.
8. The photo-thermal composite ammonia absorption type multi-energy co-supply system according to claim 4, wherein a second connecting valve is arranged between the evaporator and the liquid ammonia storage tank.
9. The photo-thermal composite ammonia absorption type multi-energy co-generation system according to claim 5, wherein a third connecting valve is arranged between the supercharging device and the liquid ammonia storage tank, a fourth connecting valve is arranged between the supercharging device and the heat collection and storage subsystem, and a fifth connecting valve is arranged between the turbine expansion unit and the liquid ammonia storage tank.
10. The photo-thermal composite ammonia absorption type multi-energy co-generation system according to any one of claims 1 to 9, wherein the heat collection and storage subsystem further comprises a heat conduction oil pipeline, and the heat conduction medium circulates in the heat conduction oil pipeline.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116961570A (en) * | 2023-07-21 | 2023-10-27 | 大唐环境产业集团股份有限公司 | Photovoltaic efficiency improving system utilizing liquid ammonia evaporation residual cooling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116961570A (en) * | 2023-07-21 | 2023-10-27 | 大唐环境产业集团股份有限公司 | Photovoltaic efficiency improving system utilizing liquid ammonia evaporation residual cooling |
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