CN112228853A - Porous medium heat transfer and storage device, heat transfer and storage power generation system and energy storage power station - Google Patents
Porous medium heat transfer and storage device, heat transfer and storage power generation system and energy storage power station Download PDFInfo
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- CN112228853A CN112228853A CN202011106137.7A CN202011106137A CN112228853A CN 112228853 A CN112228853 A CN 112228853A CN 202011106137 A CN202011106137 A CN 202011106137A CN 112228853 A CN112228853 A CN 112228853A
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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
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/06—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D2020/0047—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material using molten salts or liquid metals
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention discloses a porous medium heat transfer and storage device, a heat transfer and storage power generation system and an energy storage power station. The porous medium heat transfer and storage device comprises a heat accumulator and a heating unit, wherein the heat accumulator is of a tubular structure, two ends of the heat accumulator are respectively provided with a low-temperature port and a high-temperature port, a plurality of flow channels which are arranged up and down are arranged in the heat accumulator, and the flow channels are filled with heat storage working mediums; the heating unit is connected to the heat accumulator and is used for heating the heat transfer working medium in the heat accumulator; wherein the heat storage working medium is a porous medium. For the porous medium heat transfer and storage device, the porous medium filler which is low in cost and has the heat capacity per unit volume larger than that of the molten salt is used as the heat storage working medium, so that the cost of the heat storage working medium and the heat accumulator is reduced, and the cost of an energy storage power station is reduced; in addition, compared with the method of storing heat by adopting molten salt with high melting point, the method reduces the use of anti-freezing and anti-blocking equipment and reduces the safety risk and cost of operation.
Description
Technical Field
The invention relates to the technical field of energy storage, in particular to a porous medium heat transfer and storage device, a heat transfer and storage power generation system and an energy storage power station.
Background
In the technological progress of changing the energy industry, energy storage technology is increasingly important, and will fundamentally change the world energy structure. In order to effectively cope with the energy crisis caused by the exhaustion of fossil energy, alternatives to fossil energy, such as renewable energy sources like wind energy and solar energy, need to be sought. Regardless of the renewable energy source, a large portion of the renewable energy source must be converted into electric energy for use. However, while renewable energy resources are vigorously developed in China, electricity abandonment is increasingly serious, 169 hundred million kilowatt hours of wind abandon electricity in the nation in 2019, and the average wind abandon rate in the nation is 4%; the light abandonment is 46 hundred million kilowatt hours, and the national average light abandonment rate is 2 percent. In addition, the power grid aspect also faces increasingly huge power demand peak-to-valley difference challenges. In order to meet the future power demand and clean development target of China, demand regulation becomes one of measures for promoting power supply and demand balance regulation, and the improvement of system control capability is beneficial to the improvement of stable operation of a power system. Therefore, the matched power energy storage technology will be developed in the future.
At present, the energy storage technologies which are applied in large-scale commercialization and have lower cost include water pumping energy storage and compressed air energy storage, but the two technologies have high requirements on site selection, so that the two technologies have no universality. The existing heat storage power station adopting the molten salt heat storage technology can realize the stable operation of the power station and is not limited by the utilization conditions.
For a heat storage power station adopting a molten salt heat storage technology, the cost of the molten salt for heat storage is high, the melting point of the molten salt is high (at least 200 ℃), and anti-freezing and anti-blocking equipment is required to be added during use, so that the safety risk and cost of operation are increased, and the competition of the thermal power station with the traditional thermal power station is limited, so that the large-scale application of the thermal power station is influenced.
Disclosure of Invention
The invention aims to solve the technical problem that the cost of a heat storage working medium for an energy storage power station is high in the prior art, and provides a porous medium heat transfer and storage device, a heat transfer and storage power generation system and an energy storage power station.
A porous medium thermal transfer and storage device, comprising:
the heat accumulator is of a tubular structure, two ends of the heat accumulator are respectively provided with a low-temperature port and a high-temperature port, a plurality of flow channels which are arranged up and down are arranged in the heat accumulator, and heat accumulating working mediums are filled in the flow channels;
the heating unit is connected to the heat accumulator and is used for heating the heat transfer working medium in the heat accumulator;
wherein the heat storage working medium is a porous medium.
Preferably, a plurality of diaphragm plates arranged up and down are arranged in the heat accumulator, and the heat accumulator is divided into a plurality of flow channels by the plurality of diaphragm plates.
Preferably, the regenerator is in the shape of a non-closed circular ring or U.
Preferably, the heat transfer working medium in the heat accumulator is molten salt.
Preferably, the porous medium comprises one or more of fine-grained basalt, diabase, hard sandstone and miscellaneous sandstone.
Preferably, the heating unit includes an electric heater, the electric heater is disposed outside the heat accumulator, an outer wall surface of the electric heater is provided with a medium inlet and a medium outlet, the medium inlet is connected to the low temperature port, the medium outlet is connected to the high temperature port, a heating member is disposed inside the electric heater, and the heating member is electrically connected to an external power supply.
Preferably, the heating unit comprises a heat storage heat exchanger and a heat source, a low-temperature inlet, a high-temperature outlet, a high-temperature inlet and a low-temperature outlet are arranged on the outer wall surface of the heat storage heat exchanger, the low-temperature inlet is connected to the low-temperature port of the heat storage and communicated with the heat storage, the high-temperature outlet is connected to the high-temperature port of the heat storage and communicated with the heat storage, and the low-temperature outlet is connected to the heat source.
The utility model provides a pass heat accumulation power generation system, pass heat accumulation power generation system includes foretell porous medium passes heat accumulation device, heat exchanger and power generation unit, the outer wall of heat exchanger is equipped with hot side import, hot side export, cold side import, cold side export, hot side import connect in the high temperature mouth of heat accumulator and with the heat accumulator is linked together, hot side exit linkage in the low temperature mouth of heat accumulator and with the heat accumulator is linked together, the cold side exit linkage in power generation unit and with power generation unit is linked together.
Preferably, the porous medium heat transfer and storage device comprises a molten salt pump, and two ends of the molten salt pump are respectively connected to the high-temperature port and the hot-side inlet and are communicated with the heat accumulator and the heat exchanger; or the two ends of the molten salt pump are respectively connected to the low-temperature port and the medium inlet of the electric heater and are communicated with the heat accumulator and the electric heater.
Preferably, the power generation unit comprises a generator, a steam turbine, a condenser and a water pump, the generator is connected to the steam turbine, an inlet and an outlet of the steam turbine are respectively connected to the cold side outlet and an inlet of the condenser, two ends of the water pump are respectively connected to the outlet of the condenser and the cold side inlet, and the steam turbine, the generator, the condenser and the water pump are communicated with each other and form a power generation loop.
An energy storage power plant comprising a regenerative power generation system as described above.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
for the porous medium heat transfer and storage device, the porous medium filler which is low in cost and has the heat capacity per unit volume larger than that of the molten salt is used as the heat storage working medium, so that the cost of the heat storage working medium and the heat accumulator is reduced, and the cost of an energy storage power station is reduced; in addition, compared with the method of storing heat by adopting molten salt with high melting point, the method reduces the use of anti-freezing and anti-blocking equipment and reduces the safety risk and cost of operation. Accordingly, the same effects as described above are achieved for the heat transfer and storage power generation system and the energy storage power station comprising the porous medium heat transfer and storage device.
Drawings
Fig. 1 is a schematic structural diagram of an energy storage power plant according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view of the construction of a regenerator in accordance with a preferred embodiment of the present invention.
Fig. 3 is a schematic structural view of another energy storage power station according to a preferred embodiment of the present invention.
Fig. 4 is a schematic structural diagram of another energy storage power station according to a preferred embodiment of the present invention.
Description of reference numerals:
power supply 1
Electric heater 2
Heat accumulator 3
Heat exchanger 5
Steam turbine 6
Generator 7
Condenser 8
Water pump 9
Regenerator 11
Precooler 12
Compressor 13
Shut-off valves 141, 142, 143, 144, 145, 146
Heat storage heat exchanger 16
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
As shown in fig. 1, the present invention discloses a porous medium heat transfer and storage device, which includes a heat accumulator 3 and a heating unit, wherein the heat accumulator 3 is a tubular structure, two ends of the heat accumulator 3 are respectively provided with a low temperature port 34 and a high temperature port 33, a plurality of flow channels arranged up and down are arranged in the heat accumulator 3, and the flow channels are filled with a heat storage working medium; the heating unit is connected to the heat accumulator 3 and is used for heating the heat transfer working medium in the heat accumulator 3; wherein the heat storage working medium is a porous medium 31.
In the embodiment, since the porous medium 31 has low cost and the heat capacity per unit volume is greater than that of the molten salt, the porous medium 31 is used as the heat storage working medium, so that the cost of the heat storage working medium and the heat accumulator 3 is effectively reduced, and the cost of the energy storage power station is reduced; compared with the method of storing heat by adopting molten salt with high melting point, the method reduces the use of anti-freezing and anti-blocking equipment and reduces the safety risk and cost of operation. In addition, because the density of the low-temperature heat transfer working medium is greater than that of the high-temperature heat transfer working medium, the low-temperature heat transfer working medium is easy to sink to the bottom of the heat accumulator 3 to damage the thermocline, the heat transfer working medium flows in a certain height range by arranging a plurality of flow channels, the influence of buoyancy on the thickness of the thermocline in the heat accumulator 3 is reduced, the size of the heat accumulator 3 is reduced, and the cost of the heat accumulator 3 is reduced.
As shown in fig. 2, a plurality of diaphragms 32 arranged vertically are provided inside the heat accumulator 3, and the plurality of diaphragms 32 divide the heat accumulator 3 into a plurality of flow channels. Specifically, the regenerator 3 has a diameter of 3m, and one diaphragm 32 is arranged every 1m from top to bottom, and two layers of diaphragms 32 are arranged in total. The diaphragm plate 32 can reduce the influence of buoyancy on the thickness of the thermocline in the heat accumulator 3, so that the size of the heat accumulator 3 is reduced, the cost of the heat accumulator 3 is further reduced, and the diaphragm plate 32 is simple in structure and convenient to install.
As shown in fig. 1, the regenerator 3 has a non-closed circular ring shape. The regenerator 3 is arranged in a ring structure, so that the high-temperature port 33 is close to the low-temperature port 34, the length of a pipeline between the high-temperature port 33 and the low-temperature port 34 is obviously reduced, and the cost is further saved. In other alternative embodiments, the regenerator 3 may also be U-shaped, as shown in figure 2. The regenerator 3 may comprise a plurality of tubular structures connected in series, the plurality of tubular structures having different diameters. The large-diameter pipelines are connected through the small-diameter pipeline, so that the heat accumulator 3 can be maintained in a segmented mode. In particular, the regenerator 3 comprises two straight cylindrical pipes and one elbow of smaller diameter.
In the present embodiment, the porous medium 31 includes one or more of fine-grained basalt, diabase, sandstone and sandstone. The heat transfer working medium in the heat accumulator 3 is molten salt. The molten salt may be a multi-component mixed molten salt. The fused salt has low price and good heat transfer and storage capacity, and can adopt multi-component mixed fused salt with the boiling point of over 600 ℃, including nitrate, chloride, villaumite or carbonate, and the like. And matching proper molten salt according to the temperature of the working medium of the power generation device adopted by the power generation system. The regenerator 3 may be made of GH3535, C276 or 625 alloy or stainless steel with good corrosion resistance and high temperature strength.
As shown in fig. 1, 3 and 4, this embodiment further discloses a heat transfer and storage power generation system, which includes the above porous medium heat transfer and storage device, a heat exchanger 5 and a power generation unit, wherein an outer wall surface of the heat exchanger 5 is provided with a hot side inlet, a hot side outlet, a cold side inlet and a cold side outlet, the hot side inlet is connected to the high temperature port 33 of the heat accumulator 3 and communicated with the heat accumulator 3, the hot side outlet is connected to the low temperature port 34 of the heat accumulator 3 and communicated with the heat accumulator 3, and the cold side outlet is connected to the power generation unit and communicated.
In this embodiment, when the energy storage is needed, heat transfer working medium (molten salt) enters the heating unit from the low temperature port 34, make outside power supply 1 heat the molten salt, heat low-temperature molten salt to high-temperature molten salt, thereby make electric energy convert to heat energy, high-temperature molten salt after the electrical heating enters the heat accumulator 3 from the high temperature port 33, form the thermocline, high-temperature molten salt heats the porous medium 31 in the heat accumulator 3 simultaneously, along with the increase of heat accumulation time, the thermocline is moved to the low temperature port 34 by the high temperature port 33 of the heat accumulator 3.
When heat release and power generation are required, high temperature molten salt will enter the heat exchanger 5 through the hot side inlet. The heat energy of the high-temperature molten salt is transmitted to the power generation working medium in the heat exchanger 5 through the heat exchanger 5, the power generation working medium is output through the cold side outlet of the heat exchanger 5 and enters the power generation unit, the heat energy is output to the power generation unit, the heat energy of the power generation working medium is converted into electric energy through the power generation unit, and therefore power supply is achieved.
As shown in fig. 1, 3 and 4, the porous medium heat transfer and storage device further comprises a molten salt pump 4, wherein two ends of the molten salt pump 4 are respectively connected to the high-temperature port 33 and the hot-side inlet and are communicated with the heat accumulator 3 and the heat exchanger 5; alternatively, both ends of the molten salt pump 4 are connected to the low temperature port 34 and the medium inlet of the electric heater 2, respectively, and are communicated with the heat accumulator 3 and the electric heater 2.
As shown in fig. 1, the heating unit includes an electric heater 2, the electric heater 2 is disposed outside the heat accumulator 3, a medium inlet and a medium outlet are disposed on an outer wall surface of the electric heater 2, the medium inlet is connected to the low temperature port 34, the medium outlet is connected to the high temperature port 33, a heating member is disposed inside the electric heater 2, and the heating member is electrically connected to an external power supply 1. The external power source 1 may be a wind power plant, a photovoltaic power plant or other power generating plants with unstable power, as well as a thermal power plant with surplus electric power.
As shown in fig. 1, the power generation unit includes a generator 7, a steam turbine 6, a condenser 8 and a water pump 9, the generator 7 is connected to the steam turbine 6, an inlet and an outlet of the steam turbine 6 are respectively connected to a cold side outlet and an inlet of the condenser 8, two ends of the water pump 9 are respectively connected to an outlet and a cold side inlet of the condenser 8, and the steam turbine 6, the generator 7, the condenser 8 and the water pump 9 are communicated with each other to form a power generation loop.
Specifically, as shown in fig. 1, the regenerative power generation system further includes stop valves 141, 142, 143, 144, 145, 146, and the conversion from the regenerative power generation to the power generation is realized by opening and closing the stop valves. During heat storage, the stop valve 141, the stop valve 143 and the stop valve 144 are opened, the stop valve 142, the stop valve 145 and the stop valve 146 are closed, both ends of the molten salt pump 4 are connected to the low-temperature port 34 and the medium inlet of the electric heater 2, respectively, and are communicated with the heat accumulator 3 and the electric heater 2, the low-temperature molten salt on the low-temperature side (close to the low-temperature port 34) of the heat accumulator 3 is pumped out by the molten salt pump 4, and passes through the fourth stop valve 144, the molten salt pump 44 and the stop valve 143 to the molten salt heater 2 in sequence, and the molten salt heated by the molten salt heater 2 passes through the stop valve 141 and. As the heat storage time increases, the thermocline moves from the high-temperature side (close to the high-temperature port 33) of the heat accumulator 3 to the low-temperature side. When heat is released, the second stop valve 142, the stop valve 145 and the stop valve 146 are opened, the stop valve 141, the stop valve 143 and the stop valve 144 are closed, at this time, two ends of the molten salt pump 4 are respectively connected to the high-temperature port 33 and the hot-side inlet and are communicated with the heat accumulator 3 and the heat exchanger 5, the high-temperature molten salt in the high-temperature port 33 of the heat accumulator 3 is pumped out through the molten salt pump 4 and sequentially passes through the stop valve 142, the molten salt pump 4 and the stop valve 145 to the heat exchanger 5, the molten salt which is subjected to heat release and temperature reduction through the heat exchanger 5 passes through the stop valve 146 and returns to the low-temperature side of the heat accumulator 3, the inclined temperature layer moves from the low-temperature side to the high-temperature side of the heat accumulator 3 along with the increase of the heat release time. The power generation working medium cooled from the steam turbine 6 returns to the heat exchanger 5 through the condenser 8 and the water pump 9, thereby forming circulation.
It should be noted that in the present embodiment, the power generation unit includes a generator 7, a steam turbine 6, a condenser 8 and a water pump 9, and in other alternative embodiments, the power generation unit may also adopt a brayton cycle power generation device. Specifically, as shown in fig. 3, the power generation unit includes a turbine 10, a generator 7, a compressor 13 and a precooler 12, the generator 7 is connected to the turbine 10, the turbine 10 and the compressor 13 are co-driven, an inlet and an outlet of the turbine 10 are respectively connected to a cold-side outlet and the precooler 12, an inlet and an outlet of the compressor 13 are respectively connected to the precooler 12 and the cold-side inlet, and the turbine 10, the precooler 12, the compressor 13 and the heat exchanger 5 are communicated with each other and form a power generation loop. The power generation unit further comprises a heat regenerator 11, wherein the outer wall surface of the heat regenerator 11 is provided with a high-temperature side inlet, a high-temperature side outlet, a low-temperature side inlet and a low-temperature side outlet, the high-temperature side inlet is connected to the turbine 10 and communicated with the turbine 10, the high-temperature side outlet is connected to the precooler 12 and communicated with the precooler 12, the low-temperature side inlet is connected to the compressor 13 and communicated with the compressor 13, and the low-temperature side outlet is connected to the cold-side inlet and communicated with the heat exchanger 5.
The temperature of the power generation working medium rises through the heat exchanger 5, the power generation working medium after temperature rise enters the turbine 10 to convert heat energy into mechanical energy, then the power generation is realized through the generator 7, the power generation working medium passes through the heat regenerator 11 after passing through the turbine 10 and then enters the precooler 12, the waste heat of the power generation working medium can be further utilized through the precooler 12, the power generation working medium is used for heating the outside and the like, and the effect of energy gradient utilization is further achieved. Meanwhile, the temperature of the power generation working medium is further reduced after the power generation working medium transfers heat energy, and the power generation working medium is output through an outlet of the precooler 12 and enters the compressor 13; the power generation working medium is preheated by the heat regenerator 11 through the compressor 13 and then enters the heat exchanger 5 for cyclic utilization, and the heat energy of the power generation working medium can be further recycled through the heat regenerator 11, so that the energy-saving effect is achieved. Through the combined cycle of the power generation loop or the combined heat and power supply, the energy-saving effect is achieved, and the power generation efficiency is improved. Meanwhile, the power generation unit has the advantages of high heat-power conversion efficiency, low initial investment of equipment, low operating cost and maintenance cost, high safety, flexible site selection, modular development and the like. The power generation working medium in the power generation loop can be supercritical carbon dioxide, or can be helium, or can also be a mixed gas of helium and nitrogen.
In the present embodiment, the electric heater 2 is provided in the heating unit to heat the low-temperature molten salt; in other alternative embodiments, as shown in fig. 4, the heating unit may include the heat storage heat exchanger 16 and a heat source, and during heat storage, the stop valve 141, the stop valve 143, and the stop valve 144 are opened, the stop valve 142, the stop valve 145, and the stop valve 146 are closed, the molten salt at the low temperature side of the heat storage 3 is pumped out by the molten salt pump 4, and passes through the stop valve 144, the molten salt pump 4, and the stop valve 143 to the heat storage heat exchanger 16 in sequence, and the molten salt heated by the heat storage heat exchanger 16 passes through the stop valve 141 and returns to the high temperature side. The heat storage heat exchanger 16 is connected to other heat sources by piping. As the heat storage time increases, the thermocline moves from the high-temperature side to the low-temperature side of the heat accumulator 3. Wherein, the heat source adopts other heat sources 15, such as sunlight heat collection, high-temperature waste heat and the like.
The embodiment also discloses an energy storage power station which comprises the heat transfer and storage power generation system.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "inner", "outer", and the like, indicate orientations or positional relationships based on normal use of the device, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated at any time, and therefore, should not be construed as limiting the present invention in this respect.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (11)
1. A porous medium heat transfer and storage device, comprising:
the heat accumulator is of a tubular structure, two ends of the heat accumulator are respectively provided with a low-temperature port and a high-temperature port, a plurality of flow channels which are arranged up and down are arranged in the heat accumulator, and heat accumulating working mediums are filled in the flow channels;
the heating unit is connected to the heat accumulator and is used for heating the heat transfer working medium in the heat accumulator;
wherein the heat storage working medium is a porous medium.
2. The porous medium heat transfer and storage device of claim 1 wherein the interior of the heat accumulator is provided with a plurality of diaphragms arranged one above the other, the plurality of diaphragms dividing the heat accumulator into a plurality of flow channels.
3. The porous medium heat transfer and storage device of claim 1 wherein the heat transfer medium in the heat accumulator is molten salt.
4. The porous medium heat transfer and storage device of claim 1, wherein the porous medium comprises one or more of fine grained basalt, diabase, hard sandstone, and miscellaneous sandstone.
5. The porous medium heat transfer and storage device of claim 1 wherein the regenerator is in the shape of a non-closed circular ring or U.
6. The porous medium heat transfer and storage device according to claim 1, wherein the heating unit comprises an electric heater, the electric heater is arranged outside the heat accumulator, the outer wall surface of the electric heater is provided with a medium inlet and a medium outlet, the medium inlet is connected to the low temperature port, the medium outlet is connected to the high temperature port, and the electric heater is internally provided with a heating element which is electrically connected to an external power supply.
7. The porous medium heat transfer and storage device according to claim 1, wherein the heating unit comprises a heat storage heat exchanger and a heat source, the outer wall surface of the heat storage heat exchanger is provided with a low temperature inlet, a high temperature outlet, a high temperature inlet and a low temperature outlet, the low temperature inlet is connected to the low temperature port of the heat storage and communicated with the heat storage, the high temperature outlet is connected to the high temperature port of the heat storage and communicated with the heat storage, and the low temperature outlet is connected to the heat source.
8. A heat transfer and storage power generation system, which is characterized by comprising the porous medium heat transfer and storage device, a heat exchanger and a power generation unit according to any one of claims 1 to 7, wherein the outer wall surface of the heat exchanger is provided with a hot side inlet, a hot side outlet, a cold side inlet and a cold side outlet, the hot side inlet is connected to the high temperature port of the heat accumulator and communicated with the heat accumulator, the hot side outlet is connected to the low temperature port of the heat accumulator and communicated with the heat accumulator, and the cold side outlet is connected to the power generation unit and communicated with the power generation unit.
9. A heat transfer and storage power generation system according to claim 8, wherein the porous medium heat transfer and storage device comprises a molten salt pump, and both ends of the molten salt pump are respectively connected to the high temperature port and the hot side inlet and are communicated with the heat accumulator and the heat exchanger; or the two ends of the molten salt pump are respectively connected to the low-temperature port and the medium inlet of the electric heater and are communicated with the heat accumulator and the electric heater.
10. The heat transfer and storage power generation system according to claim 9, wherein the power generation unit comprises a power generator, a steam turbine, a condenser and a water pump, the power generator is connected to the steam turbine, an inlet and an outlet of the steam turbine are respectively connected to the cold-side outlet and an inlet of the condenser, two ends of the water pump are respectively connected to the outlet of the condenser and the cold-side inlet, and the steam turbine, the power generator, the condenser and the water pump are communicated with each other and form a power generation loop.
11. An energy storage plant, characterized in that it comprises a regenerative thermal power generation system according to any of claims 8-10.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US12012827B1 (en) | 2023-09-11 | 2024-06-18 | Natura Resources LLC | Nuclear reactor integrated oil and gas production systems and methods of operation |
| US12018779B2 (en) | 2021-09-21 | 2024-06-25 | Abilene Christian University | Stabilizing face ring joint flange and assembly thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113586182A (en) * | 2021-08-16 | 2021-11-02 | 孟金来 | Heat storage peak regulation power generation device |
| US12018779B2 (en) | 2021-09-21 | 2024-06-25 | Abilene Christian University | Stabilizing face ring joint flange and assembly thereof |
| US12012827B1 (en) | 2023-09-11 | 2024-06-18 | Natura Resources LLC | Nuclear reactor integrated oil and gas production systems and methods of operation |
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|---|---|
| CN112228853B (en) | 2022-08-02 |
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