CN112577349A - Dual-working-medium energy storage system for gradient storage and utilization of waste heat - Google Patents
Dual-working-medium energy storage system for gradient storage and utilization of waste heat Download PDFInfo
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- 238000003860 storage Methods 0.000 title claims abstract description 44
- 238000004146 energy storage Methods 0.000 title claims abstract description 42
- 239000002918 waste heat Substances 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000010248 power generation Methods 0.000 claims abstract description 34
- 238000005057 refrigeration Methods 0.000 claims abstract description 26
- 238000005338 heat storage Methods 0.000 claims description 60
- 239000012530 fluid Substances 0.000 claims description 10
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000003287 bathing Methods 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
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- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
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- 239000000835 fiber Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
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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
- F28D20/0043—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 specially adapted for long-term heat storage; Underground tanks; Floating reservoirs; Pools; Ponds
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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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- 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
Abstract
The invention provides a dual-working-medium energy storage system for gradient storage and utilization of waste heat. The energy storage unit stores the high-temperature part in the waste heat in the heat conduction oil and stores the low-temperature part in the waste heat in the water according to the principle of heat gradient storage. When the energy releasing working condition is operated, the heat conducting oil containing high-temperature heat is sequentially used for a power generation system and a refrigeration system, and the gradient utilization of the heat is completed. Meanwhile, according to different heat utilization scenes, the heat stored in the low-temperature section can be used for heating, bathing or other industrial and agricultural fields needing low-temperature heat sources. The invention can effectively improve the temperature and grade of heat accumulation, realize the supply of energy in various modes, meet the requirements of different application scenes and improve the comprehensive energy utilization efficiency of the system.
Description
The technical field is as follows:
the invention relates to a dual-working-medium energy storage system for gradient storage and utilization of waste heat, and belongs to the technical field of energy storage.
Background art:
energy has an important position in social development and human life. With the continuous acceleration of human industrialization degree and the dramatic increase of energy consumption and daily energy consumption, the world faces serious energy crisis, and the vigorous development of renewable energy is one of effective ways to deal with energy crisis and ecological problems. However, due to the inherent intermittency and instability of renewable energy, the problems of wind and light abandonment still severely restrict the large-scale grid connection and safe and stable operation of renewable energy. In addition, a large amount of middle-low grade waste heat energy exists in industrial production in China, and the waste heat is not fully utilized. The heat storage and energy storage power generation technology is one of the most effective and economical means for solving the problems of wind and light abandonment, realizing waste heat recycling and relieving the peak-valley difference of a power grid.
The high-temperature synthesized heat conducting oil belongs to an organic heat storage material, and is an organic compound specially used for heat transfer. The solar energy water heater has the advantages of uniform heating, accurate temperature control, good heat transfer effect, convenient transportation and operation and the like, and is widely applied to the fields of petrochemical industry, chemical fiber industry, aerospace, photo-thermal power generation and the like. The high-temperature synthetic heat conduction oil is prepared by synthesizing basic chemical raw materials by adopting a strict and complex processing technology and then performing separation and purification treatment, has high density, low viscosity, good fluidity, good heat transfer performance, safety and reliability, and can be regenerated on line. Because of the advantages, the heat conducting oil is more and more taken as the energy storage system of heat transfer and heat storage medium.
At present, various types of heat conduction oil energy storage systems exist in the market, a nitrogen sealing system, a regeneration system and the like are basically arranged in consideration of the characteristics of heat conduction oil as a chemical product, and the system cannot be specially designed according to the thermodynamic characteristics of the heat conduction oil. Specifically, the current conduction oil energy storage system mainly has three defects:
1. the heat conduction oil energy storage system has single function:
in the current heat conduction oil energy storage system, the energy storage function is single, generally a power generation system or a heat supply system, the heat stored by the heat conduction oil cannot be fully utilized, and the overall energy storage efficiency of the system is low.
2. Single working medium energy storage, the heat conducting oil working temperature difference is big:
as a chemical product, the heat conducting oil can be cracked continuously in the working process, and the cracking is irreversible. Under the conditions of good nitrogen seal and no pollution, the temperature factors influencing the cracking of the heat transfer oil mainly include two factors: the highest working temperature of the heat transfer oil and the working temperature difference (temperature rise and fall range) of the heat transfer oil are adopted. In the existing heat conduction oil energy storage system, heat is stored by only one working medium of heat conduction oil generally, the working temperature difference of the heat conduction oil is large, and the cracking rate of the heat conduction oil is increased.
3. The thermal physical property of heat transfer oil is not considered, and the heat storage temperature is low:
different from other heat storage working media, the physical property of the heat conduction oil changes remarkably along with the temperature, so that in the heat exchanger at the energy storage side, when the heat conduction oil is used as a cold working medium, the deviation degree of a heat exchange curve of the heat conduction oil and a heat exchange curve of a hot working medium is large, the outlet temperature of the heat conduction oil is influenced, and the heat storage temperature and the grade are further influenced.
The invention content is as follows:
the invention aims to provide a dual-working-medium energy storage system for gradient storage and utilization of waste heat, which aims to solve the existing problems, reduce the working temperature difference of heat storage of heat conduction oil, reduce the cracking rate of the heat conduction oil and increase the safety and the economical efficiency of system operation; the temperature difference of the hot end of the heat exchanger is reduced, the temperature and the grade of heat storage are effectively improved, multiple ways of energy supply are realized, the requirements of different application scenes are met, and the comprehensive energy utilization efficiency of the system is improved. .
The above purpose is realized by the following technical scheme:
a dual-working-medium energy storage system for gradient storage and utilization of waste heat comprises an energy storage unit and an energy release unit, wherein the energy storage unit comprises a high-temperature heat exchange section and a low-temperature heat exchange section, and the energy release unit comprises a power generation system, a refrigeration system and a heat supply system, wherein the power generation system is connected with the high-temperature heat exchange section;
the high-temperature heat exchange section is formed by connecting N-level high-temperature heat exchangers in series, wherein the 1 st level high-temperature heat exchanger is connected with a hot oil storage tank, the hot oil storage tank is connected with a high-temperature medium inlet of a power generation system heat exchanger through a hot oil pump, and a high-temperature medium outlet of the power generation system heat exchanger is connected with power generation equipment; a low-temperature medium outlet of the power generation system heat exchanger is connected with a high-temperature medium inlet of a refrigeration system heat exchanger, a low-temperature medium outlet of the refrigeration system heat exchanger is connected with a refrigeration system, a high-temperature medium outlet of the refrigeration heat exchanger is connected with a cold oil storage tank, and the cold oil storage tank is connected with an Nth-level high-temperature heat exchanger through a cold oil pump;
the low-temperature heat exchange section adopts a low-temperature heat exchanger, a hot water outlet of the low-temperature heat exchanger is connected with a hot water storage tank, the hot water storage tank is connected with a hot water inlet of the heat supply device through a hot water pump, a hot water outlet of the heat supply device is connected with a cold water storage tank, and the cold water storage tank is connected with a cold water inlet of the low-temperature heat exchanger through a cold water pump.
In the double-working-medium energy storage system for cascade storage and utilization of waste heat, in the N-stage high-temperature heat exchangers of the high-temperature heat exchange section, the temperature difference between the cold end and the hot end of the section heat exchanger of each stage of high-temperature heat exchanger is 70-100 ℃.
The double-working-medium energy storage system for cascade storage and utilization of the waste heat is characterized in that the heat storage working medium of the high-temperature heat exchange section is heat conduction oil, the components of the heat conduction oil are selected according to the heat storage temperature, and the maximum allowable use temperature of the heat conduction oil is 20 ℃ lower than the heat storage temperature.
The power generation equipment can adopt Rankine cycle with steam as a working medium, organic Rankine cycle with low-boiling-point fluid as a working medium, Kalina cycle with ammonia water mixture as a working medium or a turbine power generation system with high-pressure air as a working medium.
The double-working-medium energy storage system for cascade storage and utilization of the waste heat is an absorption refrigeration system, and can adopt a lithium bromide aqueous solution or an ammonia water mixture as a working medium.
Has the advantages that:
1. the invention provides a heat conduction oil/water double-working-medium energy storage system for waste heat gradient storage and utilization, which can recover industrial waste heat, solar energy, compressed air, wind and light energy abandoned and off-peak electricity energy, and can drive a steam turbine or a turbine to do work and generate electricity by heating water vapor, high-pressure air, organic working medium and the like during power generation, thereby meeting the requirements of a power grid during power utilization peak and also meeting the requirements of other energy utilization modes.
2. The waste heat gradient energy storage system adopting heat conduction oil and water dual-working-medium heat storage can reduce the working temperature difference of heat storage of the heat conduction oil, reduce the cracking rate of the heat conduction oil and increase the safety and the economical efficiency of system operation.
3. The invention adopts a waste heat step energy storage system with heat conducting oil and water double working medium for heat storage, and invents a series sectional type heat exchanger arrangement mode, which can reduce the deviation degree of heat exchange curves of cold fluid and hot fluid in the heat exchanger, reduce the temperature difference of the hot end of the heat exchanger and effectively improve the temperature and grade of heat storage.
4. The invention adopts the waste heat gradient energy storage system with heat conduction oil and water double working medium for heat storage, and the power generation system, the refrigeration system and the heating system are respectively driven according to the grade of the heat storage during energy release, thereby realizing the supply of energy in various ways and providing the comprehensive energy utilization efficiency of the system.
Description of the drawings:
FIG. 1 is a system connection diagram of the present invention.
Fig. 2 is a comparison of heat exchange curves of two heat storage system heat exchangers.
Fig. 3 shows the heat storage temperature of two heat storage systems under the same residual heat condition.
Fig. 4 shows that the two heat storage systems store heat under the same residual heat condition.
In the figure: 1. a hot oil storage tank; 2. a first stage high temperature heat exchanger; 3. a second section of high temperature heat exchanger; 4. a third section high temperature heat exchanger; 5. a cold oil storage tank; 6. a hot water storage tank; 7. a low temperature heat exchanger; 8. a cold water storage tank; 9. a cold water pump; 10. a power generation system; 11. a power generation system heat exchanger; 12. a hot oil pump; 13. a refrigeration system heat exchanger; 14. a refrigeration system; 15. a cold oil pump; 16. a heating system; 17. a hot water pump.
The specific implementation mode is as follows:
the present invention will now be described in further detail with reference to the accompanying drawings. These drawings are schematic views each illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The technical scheme of the invention is shown in figure 1, which mainly comprises an energy storage unit and an energy release unit, and can store compressed air, solar energy, industrial waste heat and abandoned wind and abandoned light and release the energy when needed by a power consumption peak or other energy consumption modes. The energy storage unit stores the high-temperature part in the waste heat in the heat conduction oil and stores the low-temperature part in the waste heat in the water according to the principle of heat gradient storage. The heat storage of the heat conduction oil is composed of a hot oil storage tank 1, a first section high-temperature heat exchanger 2, a second section high-temperature heat exchanger 3, a third section high-temperature heat exchanger 4, a cold oil storage tank 5 and a cold oil pump 15. The high-temperature heat exchanger determines the number of the sections according to the temperature difference of heat storage of the heat conducting oil, and the invention takes three sections as an example to explain, so that the temperature difference of the cold end and the hot end of each section of heat exchanger is mainly reduced, and the thermal stress generated in the process of frequently starting and stopping the heat exchanger is reduced. The water heat storage is composed of a hot water storage tank 6, a low-temperature heat exchanger 7, a cold water storage tank 8 and a cold water pump 9. To reduce the manufacturing cost and operational complexity of the equipment, the oil and water sides are typically operated at atmospheric pressure, in addition to the nitrogen seal system pressure. Therefore, the type of the heat transfer oil needs to be selected according to the heat storage temperature, in order to ensure the safety, economy and stability of the operation of the heat transfer oil, the maximum operating temperature of the heat transfer oil is generally about 20 ℃ lower than the maximum allowable use temperature, and the heat storage temperature of water is generally not more than 90 ℃. The energy release unit mainly comprises a power generation system 10, a power generation system heat exchanger 11, a hot oil pump 12, a refrigeration system heat exchanger 13, a refrigeration system 14, a heating system 16, a hot water pump 17 and the like. In the energy release unit, the power generation system 10 may be a rankine cycle using steam as a working medium, an organic rankine cycle using a low-boiling organic working medium as a working fluid, a Kalina cycle using an ammonia water mixture as a working medium, or an air turbine power generation system using high-pressure air as a working medium, the refrigeration system is an absorption refrigeration system, and a lithium bromide aqueous solution or an ammonia water mixture may be used as a working medium.
When the energy storage working condition is operated, the cold oil pump 15 and the cold water pump 9 are firstly started, and cold oil and cold water respectively flow out of the cold oil tank 5 and the cold water tank 8 and enter the high-temperature section heat exchanger and the low-temperature section heat exchanger. After the heat exchanger is circularly established, the waste heat working medium enters the heat exchanger of the energy storage unit. During energy storage, the waste heat working medium sequentially enters the first section high-temperature heat exchanger 2, the second section high-temperature heat exchanger 3, the third section high-temperature heat exchanger 4 and the low-temperature heat exchanger 5 and finally flows out of the energy storage unit. The outflow temperature of the waste heat working medium is determined according to the characteristics of the working medium, for example, if the waste heat working medium is high-temperature flue gas, the influence of dew point corrosion needs to be considered. In other cases, the heat of the waste heat is utilized as much as possible. In the high-temperature section heat exchanger, the heat conduction oil exchanges high-temperature heat in the waste heat and stores the heat in the hot oil tank 1. In the low-temperature section heat exchanger, low-temperature heat in the waste heat is exchanged by water and stored in a hot water tank. The invention has the beneficial effects that the arrangement mode of the series sectional type heat exchanger with double working medium heat storage can reduce the temperature difference of the hot end of the heat exchanger and effectively improve the temperature and the grade of heat storage.
The following description will be given by way of specific examples.
In the system shown in FIG. 1, the waste heat working medium is taken as high-temperature air, the mass flow is 120t/h, the pressure is 1.0MPa, and the air temperature is 345 ℃. In the heat storage working medium, the heat conducting oil is hydrogenated terphenyl, and the maximum service temperature can reach 350 ℃. The high-temperature section heat exchanger is 3 sections, and the temperature of water heat storage is 85 ℃. According to the current production situation and the process level of the domestic current heat exchange equipment, the temperature difference of the minimum temperature difference point of the heat exchanger is selected to be 15 ℃. In a traditional heat conduction oil system, heat is stored only by adopting heat conduction oil, and the heat storage system is hereinafter referred to as a single-working-medium heat storage system; the invention provides a heat conduction oil/water double-working-medium energy storage system for waste heat gradient storage, which adopts a method of arranging heat exchangers in series and is called as a double-working-medium heat storage system in the following. The heat storage conditions of the single-working medium heat storage system and the double-working medium heat storage system in the scheme of the invention are compared.
Fig. 2 shows a comparison of the heat exchange curves of two thermal storage systems. As can be seen from the figure, the thermal oil curve is not linear since the change of the physical properties of the thermal oil with temperature is significant. In the heat exchanger, the minimum temperature difference point is at the position close to the cold end in the middle of the heat exchanger and not at the two ends of the heat exchanger. In a single-working-medium heat storage system, the deviation of heat exchange curves of cold fluid and hot fluid is large, and the temperature difference of a hot end is large, so that the temperature of a working medium outlet is low, and the temperature and the grade of compressed heat storage are influenced. In the double-working-medium heat storage system of the scheme of the invention, because the heat is stored by adopting water at the low-temperature section, the degree of the heat exchange curve of the cold fluid deviating from the heat exchange curve of the hot fluid is reduced to a certain extent, the temperature difference of the hot end of the heat exchanger is obviously reduced, the outlet temperature of the cold fluid at the hot end is increased, and the storage temperature of the compression heat is further increased.
Fig. 3 shows a comparison of the heat storage temperatures of a single-working-medium heat storage system and a double-working-medium heat storage system according to the solution of the invention at different compressed air inlet temperatures. It can be seen from the figure that the double-medium heat storage system of the present invention can significantly increase the heat storage temperature of the system, and the higher the air inlet temperature is, the more significant the advantages of the double-medium heat storage system of the present invention are. Fig. 4 shows a comparison of the heat storage capacity and the heat storage quality (indicated as available energy or exergy) of a single-medium heat storage system and a double-medium heat storage system according to the present invention at different compressed air inlet temperatures. It can be seen from the figure that the heat storage capacity of the two heat storage systems is basically the same at different compressed air inlet temperatures, but the grade of heat storage of the double-working medium heat storage system is obviously higher than that of the single-working medium heat storage system. By combining the calculation results of fig. 2-4, the heat storage temperature of the system can be increased by the heat conduction oil/water heat storage scheme of the invention, so that the heat storage grade of the system is increased.
When the energy releasing working condition is operated, the hot oil pump 12 is started, the heat conducting oil containing high-temperature heat flows out of the hot oil tank 1, sequentially flows through the power generation system heat exchanger 11 and the refrigeration system heat exchanger 13, completes gradient utilization of heat, and then flows back into the cold oil tank 5. In the heat exchanger 11 of the power generation system, heat conduction oil is used as a heat source to heat power generation working media. According to different types of power generation systems, the heat conduction oil heats the power generation working medium to a saturated state or an overheated state. At this time, the temperature of the heat-conducting oil flowing out of the heat exchanger 11 of the power generation system is still relatively high, the heat-conducting oil enters the heat exchanger 13 of the refrigeration system as a heat source to heat and evaporate a working medium mixture in the refrigeration system 14, the refrigeration system 14 is absorption refrigeration, and a lithium bromide aqueous solution or an ammonia water mixture is used as a working medium. In the low-temperature section heat storage system, the hot water pump 17 is started during energy release, and hot water enters the heat supply system from the hot water tank 6 to finish heat release and then flows back to the cold water tank 8. According to different heat utilization scenes, the heat stored in the low-temperature section can be used for heating, bathing or other industrial and agricultural fields needing low-temperature heat sources.
While particular embodiments of the present invention have been described in the foregoing specification, various modifications and alterations will occur to those skilled in the art without departing from the spirit and scope of the invention.
Claims (5)
1. A dual-working-medium energy storage system for cascade storage and utilization of waste heat comprises an energy storage unit and an energy release unit, and is characterized in that the energy storage unit comprises a high-temperature heat exchange section and a low-temperature heat exchange section, and the energy release unit comprises a power generation system, a refrigeration system and a heat supply system, wherein the power generation system is connected with the high-temperature heat exchange section;
the high-temperature heat exchange section is formed by connecting N-level high-temperature heat exchangers in series, wherein the 1 st level high-temperature heat exchanger is connected with a hot oil storage tank, the hot oil storage tank is connected with a high-temperature medium inlet of a power generation system heat exchanger through a hot oil pump, and a high-temperature medium outlet of the power generation system heat exchanger is connected with power generation equipment; a low-temperature medium outlet of the power generation system heat exchanger is connected with a high-temperature medium inlet of a refrigeration system heat exchanger, a low-temperature medium outlet of the refrigeration system heat exchanger is connected with a refrigeration system, a high-temperature medium outlet of the refrigeration heat exchanger is connected with a cold oil storage tank, and the cold oil storage tank is connected with an Nth-level high-temperature heat exchanger through a cold oil pump;
the low-temperature heat exchange section adopts a low-temperature heat exchanger, a hot water outlet of the low-temperature heat exchanger is connected with a hot water storage tank, the hot water storage tank is connected with a hot water inlet of the heat supply device through a hot water pump, a hot water outlet of the heat supply device is connected with a cold water storage tank, and the cold water storage tank is connected with a cold water inlet of the low-temperature heat exchanger through a cold water pump.
2. The dual-working-medium energy storage system for the gradient storage and utilization of the waste heat of claim 1, wherein in the N-stage high-temperature heat exchangers of the high-temperature heat exchange section, the temperature difference between the cold end and the hot end of the section heat exchanger of each stage of the high-temperature heat exchangers is 70-100 ℃.
3. The dual-working-medium energy storage system for gradient storage and utilization of waste heat according to claim 1, wherein the heat storage working medium of the high-temperature heat exchange section adopts heat conduction oil, and the maximum allowable use temperature of the heat conduction oil is 20 ℃ lower than the heat storage temperature.
4. The dual-working-medium energy storage system for gradient storage and utilization of waste heat according to claim 1, wherein the power generation equipment can adopt a Rankine cycle using steam as a working medium, an organic Rankine cycle using a low-boiling-point fluid as a working medium, a Kalina cycle using an ammonia water mixture as a working medium, or a turbine power generation system using high-pressure air as a working medium.
5. The dual-working-medium energy storage system for gradient storage and utilization of waste heat of claim 1, wherein the refrigeration system is an absorption refrigeration system, and lithium bromide aqueous solution or ammonia water mixture can be used as a working medium.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669940A (en) * | 2021-07-24 | 2021-11-19 | 华北电力大学（保定） | Low-temperature waste heat enthalpy-increasing two-stage heat storage system |
| CN113669941A (en) * | 2021-07-24 | 2021-11-19 | 华北电力大学（保定） | Low-temperature waste heat enthalpy-increasing heat storage system |
| CN113686187A (en) * | 2021-07-24 | 2021-11-23 | 华北电力大学（保定） | Low-temperature waste heat enthalpy-increasing heat storage system based on chemical upgrading and heat storage |
| CN115095402A (en) * | 2022-06-22 | 2022-09-23 | 中国科学技术大学 | Carnot battery energy storage system and use method |
| CN116576707A (en) * | 2023-05-19 | 2023-08-11 | 清华大学 | Design method, device, equipment, medium and system of gradient phase-change heat storage system |
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| CN113669940A (en) * | 2021-07-24 | 2021-11-19 | 华北电力大学（保定） | Low-temperature waste heat enthalpy-increasing two-stage heat storage system |
| CN113669941A (en) * | 2021-07-24 | 2021-11-19 | 华北电力大学（保定） | Low-temperature waste heat enthalpy-increasing heat storage system |
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| CN113669940B (en) * | 2021-07-24 | 2023-02-24 | 华北电力大学（保定） | Low-temperature waste heat enthalpy-increasing two-stage heat storage system |
| CN113686187B (en) * | 2021-07-24 | 2023-07-04 | 华北电力大学（保定） | Low-temperature waste heat enthalpy-increasing heat storage system based on chemical quality improvement and heat storage |
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