CN111911371B - Efficient compact multifunctional disc type light-gathering power generation system - Google Patents
Efficient compact multifunctional disc type light-gathering power generation system Download PDFInfo
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- CN111911371B CN111911371B CN202010601402.2A CN202010601402A CN111911371B CN 111911371 B CN111911371 B CN 111911371B CN 202010601402 A CN202010601402 A CN 202010601402A CN 111911371 B CN111911371 B CN 111911371B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
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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
- F01K25/103—Carbon dioxide
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The invention discloses an efficient compact multifunctional disc type concentrating power generation system, and relates to the technical field of solar photo-thermal power generation; the system comprises a heat absorber, a heat storage system, a heat supply system, a steam generation system and a supercritical carbon dioxide turbine generator set; the heat absorber comprises a condenser and a photo-thermal converter for receiving the light energy of the condenser; the heat storage system is connected with the photo-thermal converter and is used for storing the heat energy converted by the photo-thermal converter; the supercritical carbon dioxide turbine generator set is connected with the heat storage system through the steam generation system and used for driving the supercritical carbon dioxide turbine generator set to generate electricity; the heat supply system is connected with the heat storage system through the steam generation system and is used for supplying heat; through implementing this technical scheme, can effectively provide one kind and can realize stable, sustainable electricity generation and possess the solar photothermal power system of heat supply function, have compact structure, the advantage that generating efficiency is high, the integrated level is high.
Description
Technical Field
The invention relates to the technical field of solar photo-thermal power generation, in particular to an efficient compact multifunctional disc type light-gathering power generation system.
Background
Increasingly severe environmental pollution has prompted mankind to accelerate development and utilization of new energy, and solar power generation is an effective measure for developing new energy and protecting the environment. At present, the solar power generation technology includes two types, namely solar photovoltaic power generation and solar photo-thermal power generation.
At present, the solar photo-thermal power generation technology mainly comprises a tower type, a groove type (including a Fresnel type) and a disc type.
The basic principle of tower type and groove type photo-thermal power generation technologies is that solar energy directly or indirectly heats water vapor after passing through a light-gathering and heat-collecting system so as to drive a steam turbine to generate electricity, and redundant light energy is stored in a heat storage tank for night or peak-load power generation. However, in the tower-type photothermal power generation technology, the mirror farther from the center of the heat collection tower contributes less to photothermal conversion of the system, which causes the problem of inevitable atmospheric attenuation loss, and in the groove-type photothermal power generation technology, because the number of heat collection circuits is large, the length of the heat collection tubes is too long, for example, the length of the heat collection tubes of a 50MW photothermal unit is 11 kilometers, the problem of inevitable heat loss of the heat collection circuits is caused. The tower type and groove type photo-thermal power generation technologies are limited by the structural factors of the tower type and groove type photo-thermal power generation technologies, the cosine efficiency is low, the photoelectric efficiency of the tower type and groove type photo-thermal power generation technologies is low, and the photoelectric efficiency of the tower type and groove type photo-thermal power generation systems in China can only reach 20% at present; and the tower type and groove type photo-thermal power generation systems adopt Rankine cycle, and the working medium is water vapor, so the water consumption is very high, but the site selection of the photo-thermal power station is generally desert gobi, and drought and water shortage restrict the development of the photo-thermal power station to a certain extent.
The existing disc type solar power generation technology utilizes a rotating paraboloid reflector to focus sunlight on a receiver to heat a working medium so as to drive a Stirling engine to generate power, and the disc type cosine efficiency can reach 100% theoretically, so that the photothermal efficiency is the highest of the three existing photothermal power generation technologies. However, the existing disc type solar power generation system has the following technical problems: the disc-type solar thermal power generation system cannot store energy and supply heat, cannot realize 24-hour uninterrupted power supply all day long and maintain stable power generation load, is immature in Stirling generator and low in power generation efficiency, and limits application of the disc-type solar thermal power generation system.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a high-efficiency compact multifunctional disc-type concentrating power generation system, which can effectively provide a solar photo-thermal photoelectric system capable of realizing stable and sustainable power generation and having a heat supply function, and has the advantages of compact structure, high power generation efficiency and high integration level.
The technical scheme adopted by the invention is as follows:
a high-efficiency compact multifunctional disc-type light-gathering power generation system comprises a heat absorber, a heat storage system, a heat supply system, a steam generation system and a supercritical carbon dioxide turbine generator set; wherein
The heat absorber comprises a condenser and a photo-thermal converter for receiving light energy of the condenser;
the heat storage system is connected with the photo-thermal converter and is used for storing the heat energy converted by the photo-thermal converter;
the supercritical carbon dioxide turbine generator set is connected with the heat storage system through a steam generation system and is used for driving the supercritical carbon dioxide turbine generator set to generate electricity;
the heat supply system is connected with the heat storage system and used for supplying heat.
Preferably, the heat storage system comprises a salt storage tank I and a salt storage tank II, and the steam generation system comprises a gas-salt heat exchanger I, a gas-salt heat exchanger, a gas-gas heat exchanger and a supercritical carbon dioxide storage tank; an outlet of the photothermal converter is connected with an inlet of the salt storage tank I through a pipeline; the export of storage salt jar I passes through the import of pipeline and I fused salt pipeline of gas salt heat exchanger and links to each other, the export of I fused salt pipeline of gas salt heat exchanger pass through the pipeline with the first import of storage salt jar II links to each other, the export of storage salt jar II pass through the pipeline with the import of II fused salt pipelines of gas salt heat exchanger links to each other, the export of II fused salt pipelines of gas salt heat exchanger pass through the pipeline with the import of light and heat converter links to each other.
Preferably, the heat supply system comprises a water-gas heat exchanger and a water-salt heat exchanger; the outlet of the salt storage tank I is connected with the inlet of the salt-melting pipeline of the water-salt heat exchanger through a pipeline, and the outlet of the salt-melting pipeline of the water-salt heat exchanger is connected with the second inlet of the salt storage tank II through a pipeline.
Preferably, the heat supply system further comprises a heat supply water pump, a hot water three-way valve and a cold water three-way valve, wherein an outlet of the heat supply water pump is connected with inlets of water pipelines of the water-gas heat exchanger and the water-salt heat exchanger through pipelines; water pipeline outlets of the water-gas heat exchanger and the water-salt heat exchanger are connected with a heat supply user through pipelines; the cold water three-way valve is arranged on a water inlet pipeline connected with the water-gas heat exchanger and the water-salt heat exchanger; the hot water three-way valve is arranged on a hot water supply pipeline connected with the water-gas heat exchanger and the water-salt heat exchanger.
Preferably, the supercritical carbon dioxide turbine generator set comprises a supercritical carbon dioxide turbine, a supercritical carbon dioxide compressor and a high-speed generator, wherein the supercritical carbon dioxide compressor is in transmission connection with the supercritical carbon dioxide turbine and the high-speed generator; and the gas pipeline outlet of the gas salt heat exchanger I is connected with the inlet of the supercritical carbon dioxide turbine through a pipeline.
Preferably, the outlet of the supercritical carbon dioxide turbine is connected with the gas pipeline inlet of the gas-salt heat exchanger II, the gas pipeline outlet of the gas-salt heat exchanger II is connected with the first inlet of the gas-gas heat exchanger through a pipeline, the first outlet of the gas-gas heat exchanger is connected with the gas pipeline inlet of the water-gas heat exchanger through a pipeline, and the gas pipeline outlet of the water-gas heat exchanger and the outlet of the supercritical carbon dioxide storage tank are connected with the inlet of the supercritical carbon dioxide compressor through pipelines; and the outlet of the supercritical carbon dioxide compressor is connected with the second inlet of the gas-gas heat exchanger through a pipeline, and the second outlet of the gas-gas heat exchanger is connected with the gas pipeline inlet of the gas-salt heat exchanger II through a pipeline. In the technical scheme, the working medium of the supercritical carbon dioxide turbine generator set is supercritical carbon dioxide and is in closed circulation.
Preferably, the heat storage system further comprises a molten salt pump I and a molten salt pump II, wherein an outlet of the salt storage tank I is connected with an inlet of a molten salt pipeline of the gas-salt heat exchanger I through the molten salt pump I, and an outlet of the salt storage tank II is connected with an inlet of a molten salt pipeline of the gas-salt heat exchanger II through the molten salt pump II; when power generation is needed, the molten salt in the salt storage tank I is pumped to the supercritical carbon dioxide from the second outlet of the gas-gas heat exchanger by the molten salt pump I, the medium-temperature molten salt after heat exchange returns to the salt storage tank II, and the supercritical carbon dioxide is pumped to the gas-salt heat exchanger II and the supercritical carbon dioxide turbine outlet by the molten salt pump II for heat exchange.
Preferably, the system further comprises a photo-thermal integration chamber, wherein the heat storage system, the heat supply system, the steam generation system and the supercritical carbon dioxide turbine generator set are integrated in the photo-thermal integration chamber.
Preferably, the heat absorber includes a set of light collectors and light-to-heat converters correspondingly disposed at an upper end of the light-to-heat integration chamber, and the light-to-heat converters are installed at focal positions of the light collectors.
Preferably, the supercritical carbon dioxide turbine, the supercritical carbon dioxide compressor and the high-speed generator in the supercritical carbon dioxide turbine generator set are coaxially and vertically arranged, and the salt storage tank II and the salt storage tank I are arranged in the photo-thermal integration chamber in a layered manner and are sequentially arranged above the supercritical carbon dioxide turbine generator set.
As described above, the present invention has at least the following advantages over the prior art:
1. the efficient compact multifunctional disc-type concentrating power generation system is high in photoelectric conversion efficiency, compact in structure and small in occupied area due to the adoption of an integrated design, and can integrate heat storage, stable and continuous power generation and heat supply.
2. According to the invention, the salt storage tank, the molten salt pump, the heat exchanger, the generator set and the water supply pump are integrated in the photo-thermal integration chamber in a layered manner, and the supercritical carbon dioxide turbine generator set consists of a supercritical carbon dioxide turbine with small volume and high energy density, a supercritical carbon dioxide compressor and a high-speed generator, and has the advantages of compactness, flexibility and high integration level.
3. Compared with the existing disc type power generation system, the photoelectric efficiency of the disc type power generation system is greatly improved, the thermoelectric efficiency of the supercritical carbon dioxide turbine generator set is higher than that of a Stirling generator, and the heat storage system and the heat supply system are combined, so that the continuous and stable power generation for 24 hours can be realized.
4. The invention not only designs a power generation system, but also designs a double heat supply system, and has multiple functions of power generation and heat supply; under normal working conditions, the invention can realize high-efficiency power generation and simultaneously utilize the regenerative heat in the supercritical carbon dioxide Brayton cycle to carry out industrial heat supply or civil heat supply so as to improve the utilization rate of heat energy, and can still utilize the high-temperature molten salt of the heat storage system to carry out industrial heat supply or civil heat supply when the power generation is stopped, thereby having good application prospect.
Drawings
The invention will be illustrated by way of example and with reference to the accompanying drawings in which
Fig. 1 is a schematic connection diagram of a high-efficiency compact multifunctional dish-type concentrating power generation system according to an exemplary embodiment of the present invention.
Description of reference numerals: 1-a condenser; 2-a light-heat converter; 3-a salt storage tank I; 4-gas salt heat exchanger II; 5-salt storage tank II; 6-molten salt pump II; 7-gas heat exchanger; 8-supercritical carbon dioxide turbine; 9-a supercritical carbon dioxide compressor; 10-a high-speed generator; 11-molten salt pump I; 12-a photothermal integration chamber; 13-hot water three-way valve; 14-heat supply water supply pump and 15-cold water three-way valve; 16-water gas heat exchanger; 17-water salt heat exchanger; 18-gas salt heat exchanger I; 19-supercritical carbon dioxide storage tank.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Example one
In one embodiment, as shown generally in FIG. 1: the embodiment provides an efficient compact multifunctional disc-type light-gathering power generation system, which comprises a heat absorber, a heat storage system, a heat supply system, a steam generation system and a supercritical carbon dioxide turbine generator set; wherein, the heat absorber includes condenser 1 and the light-heat converter 2 that is used for receiving condenser 1 light energy, and specifically, the mirror surface of condenser 1 is towards light-heat converter 2, and light-heat converter 2 is installed on condenser 1 focus.
The heat storage system provided by the embodiment is connected with the photothermal converter 2 and is used for storing the heat energy converted by the photothermal converter 2; specifically, the heat storage system comprises a salt storage tank I3 and a salt storage tank II 5, and the steam generation system comprises a gas-salt heat exchanger I18, a gas-salt heat exchanger II 4, a gas-gas heat exchanger 7 and a supercritical carbon dioxide storage tank 19; the outlet of the photothermal converter 2 is connected with the inlet of the salt storage tank I3 through a pipeline; the export of storage salt jar I3 passes through the import of pipeline and I18 fused salt pipeline of gas salt heat exchanger and links to each other, and the export of I18 fused salt pipeline of gas salt heat exchanger passes through the pipeline and links to each other with the first import of storage salt jar II 5, and the export of storage salt jar II 5 passes through the pipeline and links to each other with the import of II 4 fused salt pipelines of gas salt heat exchanger, and the export of II 4 fused salt pipelines of gas salt heat exchanger passes through the pipeline and links to each other with the import of light and heat converter.
The heating system that this embodiment provided includes aqueous vapor heat exchanger 16 and water salt heat exchanger 17, and the heating system that this embodiment provided can directly link to each other with the heat-retaining system, specifically, the export of storing up salt jar I3 passes through the import of pipeline with 17 fused salt pipelines of water salt heat exchanger, and the export of 17 fused salt pipelines of water salt heat exchanger passes through the pipeline and links to each other with the second import of storing up salt jar II 5.
The supercritical carbon dioxide turbine generator set provided by the embodiment is connected with the heat storage system through the steam generation system and is used for driving the supercritical carbon dioxide turbine generator set to generate electricity; specifically, the supercritical carbon dioxide turbine generator set comprises a supercritical carbon dioxide turbine 8, a supercritical carbon dioxide compressor 9 and a high-speed generator 10, wherein the supercritical carbon dioxide compressor 9 is in transmission connection with the supercritical carbon dioxide turbine 8 and the high-speed generator 10; an outlet of an air pipeline of the gas salt heat exchanger I18 is connected with an inlet of the supercritical carbon dioxide turbine 8 through a pipeline, and the gas salt heat exchanger is used for driving the supercritical carbon dioxide compressor 9 and driving the high-speed generator 10 to generate electricity.
The heat supply system provided by the embodiment can also be connected with the heat storage system through the steam generation system, and the heat supply system is used for supplying heat; specifically, the outlet of the supercritical carbon dioxide turbine 8 is connected with the gas pipeline inlet of the gas-salt heat exchanger II 4, the gas pipeline outlet of the gas-salt heat exchanger II 4 is connected with the first inlet of the gas-gas heat exchanger 7 through a pipeline, the first outlet of the gas-gas heat exchanger 7 is connected with the gas pipeline inlet of the water-gas heat exchanger 16 through a pipeline, and the gas pipeline outlet of the water-gas heat exchanger 16 and the outlet of the supercritical carbon dioxide storage tank 19 are connected with the inlet of the supercritical carbon dioxide compressor 9 through pipelines; an outlet of the supercritical carbon dioxide compressor 9 is connected with a second inlet of the gas-gas heat exchanger 7 through a pipeline, and a second outlet of the gas-gas heat exchanger 7 is connected with a gas pipeline inlet of the gas-salt heat exchanger II 4 through a pipeline; in the embodiment, the working medium of the supercritical carbon dioxide turbine generator set is supercritical carbon dioxide and is in closed circulation.
The heat storage system further comprises a molten salt pump I11 and a molten salt pump II 6, an outlet of the salt storage tank I3 is connected with an inlet of a molten salt pipeline of the gas-salt heat exchanger I18 through the molten salt pump I11, and an outlet of the salt storage tank II 5 is connected with an inlet of a molten salt pipeline of the gas-salt heat exchanger II 4 through the molten salt pump II 6; when power generation is needed, the molten salt in the salt storage tank I3 is pumped to the gas-salt heat exchanger I18 through the molten salt pump I11 to heat the supercritical carbon dioxide at the second outlet of the gas-gas heat exchanger 7, the medium-temperature molten salt after heat exchange returns to the salt storage tank II 5, and the medium-temperature molten salt is pumped to the gas-salt heat exchanger II 4 and the supercritical carbon dioxide at the outlet of the supercritical carbon dioxide turbine 8 through the molten salt pump II 6 to exchange heat.
The heating system provided by the embodiment further comprises a heating water feed pump 14, a hot water three-way valve 13 and a cold water three-way valve 15, wherein an outlet of the heating water feed pump 14 is connected with water pipeline inlets of a water-gas heat exchanger 16 and a water-salt heat exchanger 17 through pipelines; the water pipeline outlets of the water-gas heat exchanger 16 and the water-salt heat exchanger 17 are connected with a heat supply user through pipelines; the cold water three-way valve 15 is arranged on a water inlet pipeline connected with the water-gas heat exchanger 16 and the water-salt heat exchanger 17; the hot water three-way valve 13 is arranged on a hot water supply pipeline connected with the water-gas heat exchanger 16 and the water-salt heat exchanger 17.
The working principle of the high-efficiency compact multifunctional disc-type concentrating power generation system of the embodiment is as follows:
the mirror surface of the condenser 1 focuses sunlight to the photo-thermal converter 2, the photo-thermal converter 2 converts light energy into heat energy, and the heat energy is brought to the salt storage tank I3 through molten salt to be stored; when power generation is needed, the supercritical carbon dioxide from the supercritical carbon dioxide storage tank 19 is firstly filled in the whole working medium circulation system, which comprises a supercritical carbon dioxide compressor 9, a gas-gas heat exchanger 7, a gas-salt heat exchanger I18, a supercritical carbon dioxide turbine 8, a gas-salt heat exchanger II 4, a water-gas heat exchanger 16 and pipelines connected among all devices, then, the high-speed generator 10 utilizes the function of a driving motor to drive the supercritical carbon dioxide compressor 9 to rotate, the supercritical carbon dioxide at the inlet of the high-speed generator is pressurized, the supercritical carbon dioxide with the increased pressure respectively enters the gas-gas heat exchanger 7 and the gas-salt heat exchanger I18 and is heated, the heated supercritical carbon dioxide enters the supercritical carbon dioxide turbine 8 to perform expansion work, part of kinetic energy generated by the supercritical carbon dioxide compressor drives the supercritical carbon dioxide compressor 9 directly connected with the supercritical carbon dioxide compressor to rotate, and the rest kinetic energy is used for driving the high-speed generator 10 to generate power, the temperature of the supercritical carbon dioxide which does work is still high, and the supercritical carbon dioxide cannot directly enter the supercritical carbon dioxide compressor 9 to participate in circulation, so the supercritical carbon dioxide is introduced into the gas salt heat exchanger II 4, the gas heat exchanger 7 and the water-gas heat exchanger 16, part of heat of the supercritical carbon dioxide is recovered by the molten salt in the salt storage tank II 5 and the supercritical carbon dioxide working medium at the outlet of the supercritical carbon dioxide compressor 9 respectively, the circulation efficiency of the system is improved, and finally the supercritical carbon dioxide is reduced to the safe temperature by the cooling water in the water-gas heat exchanger 16 and enters the supercritical carbon dioxide compressor 9 again to realize the closed circulation of the supercritical carbon dioxide power generation.
When the power generation system is started, the molten salt in the salt storage tank I3 is pumped to the gas salt heat exchanger I18 by the molten salt pump I11 to heat the supercritical carbon dioxide from the gas-gas heat exchanger 7, the medium-temperature molten salt after heat exchange returns to the salt storage tank II 5 and is pumped to the gas salt heat exchanger II 4 by the molten salt pump II 6 to cool the supercritical carbon dioxide at the outlet of the supercritical carbon dioxide turbine 8, the molten salt after heat exchange returns to the photo-thermal converter 2 to continuously absorb the light energy of the condenser 1, so that continuous circulation is realized, and the heat energy is transferred to the heat storage tank and the supercritical carbon dioxide working medium by the molten salt in the circulation process; the design of the heat storage system ensures that the system can realize 24-hour continuous and stable power generation;
when heat supply is needed, water coming from a heat supply user is pumped into the water-gas heat exchanger 16 and the water-salt heat exchanger 17 through the heat supply water feeding pump 14 to be heated, when the system is in a power generation state, the supercritical carbon dioxide heat from the second outlet of the gas-gas heat exchanger 7 is enough to heat the heat supply water, the outlet water of the cold water three-way valve 15 enters the water-gas heat exchanger 16, and the water pipeline outlet of the water-gas heat exchanger 16 enters a hot water supply pipeline through the hot water three-way valve 13; when the system stops generating electricity, the outlet water of the cold water three-way valve 15 enters the water salt heat exchanger 17 and high-temperature molten salt from the outlet of the salt storage tank I3 to exchange heat, and the heated hot water enters the hot water supply pipeline through the hot water three-way valve 13, so that the double heat supply functions can be effectively realized no matter whether the system is in an electricity generation state or not.
Example two
The second embodiment is substantially the same as the first embodiment, except that: the embodiment provides a high-efficient compact multi-functional dish formula spotlight power generation system, still includes light and heat integration chamber 12 to make heat-retaining system, heating system, steam generation system and supercritical carbon dioxide turbine generator set integrate in light and heat integration chamber 12 in the embodiment one, adopt integrated form design, compact structure and area are little, can realize that heat-retaining, stable continuation electricity generation, heat supply are as an organic whole.
Specifically, as shown in fig. 1, the heat absorber provided by the present embodiment includes a set of light collector 1 and a light-to-heat converter 2 correspondingly disposed at the upper end of the light-to-heat integration chamber 12, the light-to-heat converter 2 is installed at the focal position of the corresponding light collector 1, and the outlet of the light-to-heat converter 2 is connected to the inlet of the salt storage tank i 3 through a pipeline; in the supercritical carbon dioxide turbine generator set provided by the embodiment, the supercritical carbon dioxide turbine 8, the supercritical carbon dioxide compressor 9 and the high-speed generator 10 are coaxially and vertically arranged and coaxially and sequentially arranged from top to bottom, and the salt storage tank II 5 and the salt storage tank I3 are arranged in the photo-thermal integration chamber 12 in a layered manner and sequentially arranged above the supercritical carbon dioxide turbine generator set and integrated in the photo-thermal integration chamber 12.
In conclusion, the efficient compact multifunctional disc-type light-gathering power generation system of the embodiment integrates the salt storage tank, the molten salt pump, the heat exchanger, the power generator set and the water feed pump in the photo-thermal integration chamber 12 in a layered manner, and the supercritical carbon dioxide turbine power generator set consists of the supercritical carbon dioxide turbine 8 with small volume and high energy density, the supercritical carbon dioxide compressor 9 and the high-speed power generator 10, so that the efficient compact multifunctional disc-type light-gathering power generation system has the advantages of compactness, flexibility and high integration level, and has good application prospect and popularization and use value.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a high-efficient compact multi-functional dish formula spotlight power generation system which characterized in that: the system comprises a heat absorber, a heat storage system, a heat supply system, a steam generation system and a supercritical carbon dioxide turbine generator set; wherein
The heat absorber comprises a condenser and a photo-thermal converter for receiving light energy of the condenser;
the heat storage system is connected with the photo-thermal converter and is used for storing the heat energy converted by the photo-thermal converter;
the supercritical carbon dioxide turbine generator set is connected with the heat storage system through a steam generation system and used for driving the supercritical carbon dioxide turbine generator set to generate electricity;
the heat supply system is connected with the heat storage system and used for supplying heat; the heat storage system comprises a salt storage tank I and a salt storage tank II, and the steam generation system comprises a gas salt heat exchanger I, a gas salt heat exchanger II, a gas-gas heat exchanger and a supercritical carbon dioxide storage tank; an outlet of the photothermal converter is connected with an inlet of the salt storage tank I through a pipeline; an outlet of the salt storage tank I is connected with an inlet of a fused salt pipeline of the gas-salt heat exchanger I through a pipeline, an outlet of the fused salt pipeline of the gas-salt heat exchanger I is connected with a first inlet of the salt storage tank II through a pipeline, an outlet of the salt storage tank II is connected with an inlet of a fused salt pipeline of the gas-salt heat exchanger II through a pipeline, and an outlet of the fused salt pipeline of the gas-salt heat exchanger II is connected with an inlet of the photothermal converter through a pipeline; the heat supply system comprises a water-gas heat exchanger and a water-salt heat exchanger; an outlet of the salt storage tank I is connected with an inlet of a salt melting pipeline of the water-salt heat exchanger through a pipeline, and an outlet of the salt melting pipeline of the water-salt heat exchanger is connected with a second inlet of the salt storage tank II through a pipeline; the heat supply system also comprises a heat supply water feed pump, a hot water three-way valve and a cold water three-way valve, wherein the outlet of the heat supply water feed pump is connected with the water pipeline inlets of the water-gas heat exchanger and the water-salt heat exchanger through pipelines; the water pipeline outlets of the water-gas heat exchanger and the water-salt heat exchanger are connected with a heat supply user through pipelines; the cold water three-way valve is arranged on a water inlet pipeline connected with the water-gas heat exchanger and the water-salt heat exchanger; the hot water three-way valve is arranged on a hot water supply pipeline connected with the water-gas heat exchanger and the water-salt heat exchanger.
2. The efficient compact multi-function dish concentrating power generation system of claim 1 wherein: the supercritical carbon dioxide turbine generator set comprises a supercritical carbon dioxide turbine, a supercritical carbon dioxide compressor and a high-speed generator, wherein the supercritical carbon dioxide compressor is in transmission connection with the supercritical carbon dioxide turbine and the high-speed generator; and the gas pipeline outlet of the gas salt heat exchanger I is connected with the inlet of the supercritical carbon dioxide turbine through a pipeline.
3. The efficient compact multi-function dish concentrating power generation system of claim 2 wherein: an outlet of the supercritical carbon dioxide turbine is connected with an inlet of an air pipeline of the gas-salt heat exchanger II, an outlet of the air pipeline of the gas-salt heat exchanger II is connected with a first inlet of the gas-gas heat exchanger through a pipeline, a first outlet of the gas-gas heat exchanger is connected with an inlet of an air pipeline of the water-gas heat exchanger through a pipeline, and an outlet of the air pipeline of the water-gas heat exchanger and an outlet of the supercritical carbon dioxide storage tank are connected with an inlet of the supercritical carbon dioxide compressor through pipelines; and the outlet of the supercritical carbon dioxide compressor is connected with the second inlet of the gas-gas heat exchanger through a pipeline, and the second outlet of the gas-gas heat exchanger is connected with the gas pipeline inlet of the gas-salt heat exchanger II through a pipeline.
4. A high efficiency compact multi-function dish concentrating power generation system according to claim 3 wherein: the heat storage system further comprises a molten salt pump I and a molten salt pump II, an outlet of the salt storage tank I is connected with an inlet of a molten salt pipeline of the gas-salt heat exchanger I through the molten salt pump I, and an outlet of the salt storage tank II is connected with an inlet of a molten salt pipeline of the gas-salt heat exchanger II through the molten salt pump II; when power generation is needed, the molten salt in the salt storage tank I is pumped to the gas salt heat exchanger I through the molten salt pump I and is used for heating supercritical carbon dioxide from a second outlet of the gas-gas heat exchanger, medium-temperature molten salt after heat exchange returns to the salt storage tank II, and the medium-temperature molten salt is pumped to the gas salt heat exchanger II and the supercritical carbon dioxide from the supercritical carbon dioxide turbine outlet through the molten salt pump II to exchange heat.
5. The efficient compact multi-function dish concentrating power generation system of claim 2 wherein: still include the light and heat integration room, heat-retaining system, heating system, steam generation system and supercritical carbon dioxide turbine generator set integrate in the light and heat integration is indoor.
6. The efficient compact multi-function dish concentrating power generation system of claim 5, wherein: the heat absorber is including corresponding a set of spotlight ware and the light and heat converter of arranging at the integrated indoor end of light and heat, the focus position at the spotlight ware that corresponds is installed to the light and heat converter.
7. The high efficiency compact multi-function dish concentrating power generation system of claim 5 wherein: supercritical carbon dioxide turbine, supercritical carbon dioxide compressor and high-speed generator among the supercritical carbon dioxide turbine generator set are coaxial vertical arrangement, store up salt jar II and store up salt jar I layering and arrange in the light and heat integration indoor and locate supercritical carbon dioxide turbine generator set's top in proper order.
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