CN110792566A - Photo-thermal molten salt heat storage Stirling power generation system and method - Google Patents
Photo-thermal molten salt heat storage Stirling power generation system and method Download PDFInfo
- Publication number
- CN110792566A CN110792566A CN201810866579.8A CN201810866579A CN110792566A CN 110792566 A CN110792566 A CN 110792566A CN 201810866579 A CN201810866579 A CN 201810866579A CN 110792566 A CN110792566 A CN 110792566A
- Authority
- CN
- China
- Prior art keywords
- molten salt
- power generation
- heat
- thermal
- stirling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/055—Heaters or coolers
-
- 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
Abstract
The invention discloses a photo-thermal molten salt heat storage Stirling power generation system which comprises a photo-thermal molten salt heat storage device and a Stirling power generation device, wherein the photo-thermal molten salt heat storage device comprises a solar heat collection device and a molten salt tank (4), and molten salt is placed in the molten salt tank (4); the solar heat collection device is connected with the molten salt tank (4) through a first molten salt pump; the Stirling power generation device (7) comprises a hot end (5) and a cold end (8); the hot end (5) is connected with the solar heat collecting device and the molten salt tank (4), and the molten salt tank (4) is connected with the hot end (5) of the Stirling power generation device (7) through a second molten salt pump; the invention realizes the photo-thermal heat collection and the heat storage of the solar heat collection device through the high-temperature molten salt and the molten salt tank; the non-integrated external Stirling generator is realized, and the complexity and the installation difficulty of the disc type photo-thermal Stirling power generation system are reduced; the stable power generation output of the Stirling generator under all-day and all-weather conditions is realized.
Description
Technical Field
The invention belongs to the field of energy utilization, and particularly relates to a photo-thermal molten salt heat storage Stirling power generation system and method.
Background
With the global energy consumption becoming tense, people pay more and more attention to the environment. Energy shortage and environmental pollution have become important topics influencing people's lives and restricting social development, and all countries around the world strive to develop clean new energy.
Solar energy is the most abundant and reliable resource, and the energy irradiated by sunlight received by the earth every 40min is equivalent to the total energy consumption of one year all over the world. Solar power generation is a new renewable energy technology, and the characteristics of cleanness, no pollution and reproducibility of solar energy become the most powerful substitute of the traditional petrochemical energy. Solar power generation has been of increasing interest during the past decade due to its enormous potential and good environmental performance. In the newly added installed power generation capacity of the European Union in 2010, solar power generation exceeds wind power for the first time, and becomes the most renewable energy power of the newly added installed power generation capacity of the European Union. With the technical progress and scale expansion of the global solar power generation industry, solar power generation becomes an important renewable energy source following hydropower and wind power, and becomes an important component of a power system.
The solar photo-thermal power generation comprises a groove type solar power generation system, a tower type solar power generation system and a disc type solar power generation system. The disc type photo-thermal Stirling generator is the highest in photoelectric conversion efficiency at present. However, the conventional disc type photo-thermal Stirling generator can generate electricity only under the condition of illumination in the daytime, so that an unstable power generation source is provided for a power grid, and the power grid does not have any peak regulation capacity. Therefore, a technology capable of performing stable power generation output and realizing energy storage under all-weather conditions for 24 hours all day is urgently needed to be developed.
The invention is provided in view of the above.
Disclosure of Invention
The invention aims to provide a photo-thermal molten salt heat storage Stirling power generation system, which solves the problem that the conventional disc-type photo-thermal Stirling generator cannot generate and store power at night.
In order to realize the purpose, the invention adopts the following technical scheme:
the photo-thermal molten salt heat storage Stirling power generation system comprises a photo-thermal molten salt heat storage device and a Stirling power generation device, wherein the photo-thermal molten salt heat storage device comprises a solar heat collection device and a molten salt tank, and molten salt is placed in the molten salt tank; the solar heat collection device is connected with the molten salt tank through a first molten salt pump; the Stirling power generation device comprises a hot end and a cold end; the hot end is connected with the solar heat collection device and the molten salt tank, and the molten salt tank is connected with the hot end of the Stirling power generation device through a second molten salt pump.
Preferably, the cold end is provided with a heat exchange device, and the heat exchange device exchanges heat through air or water.
Preferably, the molten salt tank of the power generation system is connected with a plurality of solar heat collecting devices, and the molten salt tank can store the heat collected by the plurality of solar heat collecting devices connected with the molten salt tank.
Preferably, a burner is arranged on one side of the hot end of the Stirling power generation device, and the burner can heat the hot end to provide heat for the hot end of the Stirling power generation device.
Preferably, the power generation system comprises a molten salt heat exchanger, the molten salt heat exchanger is connected with a molten salt tank, and molten salt in the molten salt tank can convert water into steam or hot water through the molten salt heat exchanger to supply heat to the outside.
Preferably, the power generation system comprises a molten salt heat exchanger, and the molten salt heat exchanger is connected with the molten salt tank; the Stirling power generation system and the thermal power generating unit power generation system are arranged in parallel, and part of steam generated by the thermal power generating unit is pumped to the molten salt heat exchanger and transfers heat of the steam to molten salt in the molten salt heat exchanger.
The photo-thermal molten salt heat storage Stirling power generation method is executed by the photo-thermal molten salt heat storage Stirling power generation system, and comprises the following steps:
s1: liquefying the molten salt in the molten salt tank;
s2: determine if there is illumination? If yes, go to step S3; otherwise, go to step S4;
s3: starting the photoelectric molten salt heat storage device, and generating power by the Stirling power generation device driven by the molten salt;
s4: judging whether the heat storage capacity and the molten salt temperature in the molten salt tank can drive the Stirling power generation device? If yes, go to step S5; otherwise, go to step S2;
s5: and starting the Stirling power generation device driven by the molten salt to generate electricity.
Preferably, the step S3 includes the steps of:
s31: starting the photo-thermal molten salt heat storage device;
s32: the solar heat collection device heats the molten salt to raise the temperature;
s33: and (4) conveying the heated molten salt to the hot end of the external Stirling power generation device, and generating power by the corresponding Stirling power generation device.
The photo-thermal molten salt heat storage Stirling power generation method is executed by the photo-thermal molten salt heat storage Stirling power generation system, and comprises the following steps:
s1: liquefying the molten salt in the molten salt tank;
s2: determine if there is illumination? If yes, go to step S3; otherwise, go to step S4;
s3: starting the photo-thermal molten salt heat storage device, and generating electricity by the Stirling power generation device driven by molten salt;
s4: judging whether the heat storage capacity and the molten salt temperature in the molten salt tank can drive the Stirling power generation device? If yes, go to step S5; otherwise, go to step S6;
s5: starting a Stirling power generation device driven by molten salt to generate electricity;
s6: and starting the burner, heating the hot end to heat the molten salt in the hot end, and driving the Stirling power generation device to generate power by the high-temperature molten salt.
Preferably, the step S3 includes the steps of:
s31: starting the photo-thermal molten salt heat storage device;
s32: the solar heat collection device heats the molten salt to raise the temperature;
s33: and (4) conveying the heated molten salt to the hot end of the external Stirling power generation device, and generating power by the corresponding Stirling power generation device.
Advantageous effects
1. The photo-thermal heat collection and the heat storage of the solar heat collection device are realized through high-temperature molten salt and a molten salt tank;
2. the non-integrated external Stirling generator can be realized by utilizing the heat storage of the molten salt tank and the heat transmission of the high-temperature molten salt pipeline, and the complexity and the installation difficulty of the disc type photo-thermal Stirling power generation system are reduced;
3. the Stirling generator is driven by using the heat stored in the molten salt tank and the high-temperature molten salt, so that the stable power generation output of the Stirling generator in 24 hours all day and all weather conditions can be realized;
4. the non-integrated external Stirling generator makes it possible to heat the hot end by using fuel gas to supplement power generation.
Drawings
FIG. 1 is a light-time working principle diagram of a photo-thermal molten salt heat storage Stirling power generation system according to a first embodiment of the power generation system;
FIG. 2 is a light-time-free working principle diagram of a photo-thermal molten salt heat storage Stirling power generation system according to a first embodiment of the power generation system;
FIG. 3 illustrates the method operational steps of the Stirling power generation system in accordance with one embodiment;
FIG. 4 is a light-time working principle diagram of a Stirling power generation system with light-heat molten salt heat storage coupled gas in a second embodiment of the power generation system of the invention;
FIG. 5 is a light-time free working principle diagram of a Stirling power generation system with photo-thermal molten salt heat storage coupled gas in a second embodiment of the power generation system of the invention;
FIG. 6 is a light-time-free working principle diagram of a Stirling power generation system with photo-thermal molten salt heat storage coupled gas in a second embodiment of the power generation system;
FIG. 7 illustrates the method operational steps of the Stirling power generation system of the second embodiment;
FIG. 8 is a light-time working principle diagram of a photo-thermal molten salt heat storage Stirling power generation system in a third embodiment of the power generation system of the invention;
FIG. 9 is a light-time-free working principle diagram of a photo-thermal molten salt heat storage Stirling power generation system in a third embodiment of the power generation system of the invention;
FIG. 10 is a steam heat supply schematic diagram of a photo-thermal molten salt heat storage Stirling power generation system in a third embodiment of the power generation system of the invention;
FIG. 11 is a light-time working principle diagram of a photo-thermal molten salt heat storage Stirling power generation system according to a fourth embodiment of the power generation system of the invention;
FIG. 12 is a light-time-free working principle diagram of a photo-thermal molten salt heat storage Stirling power generation system according to a fourth embodiment of the power generation system of the invention;
FIG. 13 is a steam heat storage schematic diagram of a photo-thermal molten salt heat storage Stirling power generation system in a fourth embodiment of the power generation system of the invention;
description of the reference numerals
To further clarify the structure and connection between the various components of the present invention, the following reference numerals are given and described.
The device comprises a heat collector 1, a condenser 2, an electric heater 3, a molten salt tank 4, a hot end 5, a combustor 6, a Stirling power generation device 7, a cold end 8 and a molten salt heat exchanger 9.
The technical scheme of the invention can be more clearly understood and explained by combining the embodiment of the invention through the reference sign description.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the scope of the present invention as claimed is not limited to the scope described in the specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Example one
The light-heat molten salt heat storage Stirling power generation system comprises a light-heat molten salt heat storage device and a Stirling power generation device 7, wherein the light-heat molten salt heat storage device comprises a solar heat collection device and a molten salt tank 4. The solar heat collection device comprises a heat collector 1 and a light collector 2, wherein the light collector 2 collects sunlight into the heat collector 1, and the heat collector 1 converts light energy into heat energy.
A heat storage working medium is placed in the molten salt tank 4, and the heat storage working medium is salt; an electric heater 3 is arranged in the molten salt tank 4, and the electric heater 3 is used for heating the heat storage working medium to a fluid state. The heat storage temperature in the molten salt tank 4 is 50-1000 ℃, the molten salt comprises alkali metal or alkaline earth metal and any one or a plurality of combinations of halide, silicate, carbonate, nitrate and phosphate, and the molten salt is binary salt, ternary salt or multi-element combination salt.
The solar heat collection device is connected with the molten salt tank 4 through a first molten salt pump, and the first molten salt pump can pump the fluid heat storage working medium in the molten salt tank 4 to the heat collector 1.
The Stirling power generation device 7 comprises a hot end 5 and a cold end 8, the hot end 5 of the Stirling power generation device is connected with the heat collector 1 and the molten salt tank 4, and the molten salt tank 4 is connected with the hot end 5 of the Stirling power generation device 7 through a second molten salt pump. The cold end 8 is provided with a heat exchange device, cold water is introduced into the heat exchange device, and the cold water absorbs the residual heat of the cold end 8 after passing through the heat exchange device to heat, so that hot water flows out for heat supply or domestic hot water.
The fluid heat storage working medium in the molten salt tank 4 can enter the heat collector 1 through the first molten salt pump and also can enter the hot end 5 of the Stirling power generation device 7 through the second molten salt pump.
The molten salt tank 4 of the power generation system is connected with a plurality of solar heat collecting devices, and the size of the molten salt tank 4 is set to meet the requirements of storing the heat collected by the plurality of solar heat collecting devices correspondingly connected with the molten salt tank and meeting the heat required by a Stirling power generation device or a heat supply device for 24 hours all day.
The Stirling power generation device 7 is a Stirling generator.
As shown in fig. 1, when light is emitted, the fluid heat storage working medium in the molten salt tank 4 enters the heat collector 1 through the first molten salt pump, and then absorbs the heat energy converted from solar energy received by the heat collector 1, and the heat energy is heated to high-temperature molten salt, and the high-temperature molten salt enters the hot end 5 of the stirling power generation device 7 through the pipeline, so that the hot end 5 is heated, the hot end 5 and the cold end 8 form a temperature difference, power is provided for the stirling power generation device 7, and the stirling power generation device 7 generates power. The fluid molten salt cooled at the hot end 5 returns to the molten salt tank 4 through a pipeline, so that the fluid molten salt is recycled. Cold water or air (along the direction of R1) is introduced into the heat exchange device at the cold end 8, and the cold water or air absorbs the residual heat at the cold end 8 after passing through the heat exchange device to raise the temperature, so that hot water (along the direction of R2) flows out for supplying heat or domestic hot water.
As shown in fig. 2, when there is no light or weak light, the electric heater 3 in the molten salt tank 4 is filled with the working medium in the molten salt tank 4, and whether the heat storage amount and the molten salt temperature of the molten salt tank 4 can drive the stirling power generation device is judged, if not, step S2 is executed; if the temperature difference between the hot end 5 and the cold end 8 is small, the second molten salt pump is turned on, the high-temperature molten salt enters the hot end 5 of the Stirling power generation device 7, the temperature difference is formed between the hot end 5 and the cold end 8, power is provided for the Stirling power generation device 7, and the Stirling power generation device 7 generates power. The fluid molten salt cooled at the hot end 5 returns to the molten salt tank 4 through a pipeline, so that the fluid molten salt is recycled. Cold water is introduced into the heat exchange device at the cold end 8, and the cold water absorbs the residual heat at the cold end 8 after passing through the heat exchange device to be heated, so that hot water flows out for supplying heat or domestic hot water.
As shown in fig. 3, the photo-thermal molten salt heat storage stirling power generation method comprises the following steps:
s1: utilizing electric heating to liquefy the molten salt in the molten salt tank;
s2: determine if there is illumination? If yes, go to step S3; otherwise, go to step S4;
s3: starting the photoelectric molten salt heat storage device, and generating power by the Stirling power generation device driven by the molten salt;
s4: judging whether the heat storage capacity and the molten salt temperature in the molten salt tank can drive the Stirling power generation device? If yes, go to step S5; otherwise, go to step S2;
s5: and starting the Stirling power generation device driven by the molten salt to generate electricity.
When the Stirling power generation system generates power, the cold end waste heat of the Stirling power generation device generates hot water for supplying heat or domestic hot water.
The step S3 specifically includes the following steps:
s31: starting the photo-thermal molten salt heat storage device;
s32: the solar heat collection device heats the molten salt to raise the temperature;
s33: and (4) conveying the heated molten salt to the hot end of the external Stirling power generation device, and generating power by the corresponding Stirling power generation device.
Example two
The principle of this embodiment is the same as that of the first embodiment, and the main differences are as follows: the photo-thermal molten salt heat storage Stirling power generation system is coupled with fuel gas to form a Stirling power generation system with the photo-thermal molten salt heat storage coupled with the fuel gas.
As shown in fig. 4-6, the power generation system includes a combustor 6. The stirling power plant 7 can use high temperature molten salt as a heat source for its hot end 5 as in the first embodiment. The hot end 5 of the Stirling power generation device 7 is provided with a molten salt heating surface, one side of the molten salt heating surface is provided with a burner 6, the burner 6 is a gas heat source device, and the burner 6 can heat molten salt in the hot end 5; namely, the gas heat source device in the combustor 6 generates heat and transmits the heat to the hot end 5 of the Stirling power generation device 7 positioned on one side, so that the hot end 5 is heated, the hot end 5 and the cold end 8 form temperature difference, power is provided for the Stirling power generation device 7, and the Stirling power generation device 7 generates power. Cold water is introduced into the heat exchange device at the cold end 8, and the cold water absorbs the residual heat at the cold end 8 after passing through the heat exchange device to be heated, so that hot water flows out for supplying heat or domestic hot water.
The hot end of the external non-integrated Stirling power generation device can also adopt gas to burn to provide heat, and the used gas can be any one of combustible gases such as natural gas, biomass gas, methane, coke oven gas, hydrogen and the like.
As shown in fig. 7, the stirling power generation method by coupling photo-thermal molten salt heat storage with fuel gas comprises the following steps:
s1: utilizing electric heating to liquefy the molten salt in the molten salt tank;
s2: determine if there is illumination? If yes, go to step S3; otherwise, go to step S4;
s3: starting the photo-thermal molten salt heat storage device, and generating electricity by the Stirling power generation device driven by molten salt;
s4: judging whether the heat storage capacity and the molten salt temperature in the molten salt tank can drive the Stirling power generation device? If yes, go to step S5; otherwise, go to step S6;
s5: starting a Stirling power generation device driven by molten salt to generate electricity;
s6: and starting the burner, heating the hot end to heat the molten salt in the hot end, and driving the Stirling power generation device to generate power by the high-temperature molten salt.
The step S3 specifically includes the following steps:
s31: starting the photo-thermal molten salt heat storage device;
s32: the solar heat collection device heats the molten salt to raise the temperature;
s33: sending the heated molten salt to the hot end of an external Stirling power generation device, and generating power by the corresponding Stirling power generation device;
when the Stirling power generation system generates power, the cold end waste heat of the Stirling power generation device generates hot water for supplying heat or domestic hot water.
EXAMPLE III
The principle of this embodiment is the same as that of the first embodiment, and the main differences are as follows: the power generation system comprises a molten salt heat exchanger 9, as shown in fig. 10, the molten salt heat exchanger 9 is connected with a molten salt tank 4, molten salt in the molten salt tank 4 can change water into steam through the molten salt heat exchanger 9, and the steam is conveyed to a small steam turbine, a fan heater, a shaft seal system or a thermodynamic system to provide steam for heating; industrial steam may also be supplied externally. In addition, the molten salt in the molten salt tank 4 can convert water into hot water through the molten salt heat exchanger 9 to supply heat to the outside.
As shown in fig. 8-9, the power generation system operates in the same manner as the first embodiment, and when the steam supply is needed, molten salt is led to pass through the molten salt heat exchanger 9.
Example four
The principle of this embodiment is the same as that of the first embodiment, and the main differences are as follows: the Stirling power generation system and the thermal power generating unit power generation system are arranged in parallel, and at the moment, peak regulation steam extraction of the thermal power generating unit utilizes the fused salt in the fused salt heat exchanger 9 and the fused salt tank 4 to store heat and regulate peak; as shown in fig. 13, the power generation system comprises a molten salt heat exchanger 9, the molten salt heat exchanger 9 is connected with a molten salt tank 4, and molten salt in the molten salt tank 4 passes through the molten salt heat exchanger 9; in order to reduce the power on grid, the thermal power generating unit increases the steam extraction amount of the steam turbine system, so that the generating capacity of the thermal power generating unit is reduced, the increased steam passes through the molten salt heat exchanger 9, the heat of the steam is transferred to the molten salt in the molten salt heat exchanger 9, the molten salt is heated, and the heat storage and peak regulation are realized. When the power grid is transited to the electricity consumption peak period, the heat stored by the molten salt can directly generate electricity through the Stirling power generation system on one hand, and on the other hand, the heat stored by the molten salt can generate superheated steam with enough temperature and pressure parameters to return to the steam turbine again, so that the generating capacity of the unit is increased.
The steam heat accumulated by the molten salt is converted into steam through the molten salt heat exchanger and then is used for generating power by the thermal power generating unit, and on the other hand, when the heat is enough, the Stirling power generation can be carried out by heating the hot end of the Stirling power generation device. Preferably, the stirling power generation is performed by heating the hot end of the stirling power generation device.
As shown in FIGS. 11-12, the operation steps of the power generation system are the same as those of the first embodiment, and the above measures can be taken when peak shaving is needed.
The invention has the following beneficial effects:
1. the photo-thermal heat collection and the heat storage of the solar heat collection device are realized through high-temperature molten salt and a molten salt tank;
2. the non-integrated external Stirling power generation device can be realized by utilizing the heat storage of the molten salt tank and the heat transmission of the high-temperature molten salt pipeline, and the complexity and the installation difficulty of the disc type photo-thermal Stirling power generation system are reduced;
3. the heat storage of the molten salt tank and the high-temperature molten salt are utilized to drive the Stirling power generation device, so that the stable power generation output of the Stirling power generation device under the full-weather condition of 24 hours all day can be realized;
4. the non-integrated external Stirling power generation device makes it possible to utilize gas to heat the hot end for supplementary power generation.
In the description of the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; either directly or through an intermediary profile. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "a specific embodiment," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application, and exemplary expressions for the terms above do not necessarily refer to the same embodiment or embodiment in the specification. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be understood by those skilled in the art that although the embodiments of the present invention have been described above, the embodiments are only used for understanding the present invention, and are not intended to limit the embodiments of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a light and heat fused salt heat accumulation stirling power generation system which characterized in that: the solar energy-saving heat pump water heater comprises a photo-thermal molten salt heat storage device and a Stirling power generation device (7), wherein the photo-thermal molten salt heat storage device comprises a solar heat collection device and a molten salt tank (4), and molten salt is placed in the molten salt tank (4); the solar heat collection device is connected with the molten salt tank (4) through a first molten salt pump; the Stirling power generation device (7) comprises a hot end (5) and a cold end (8); the hot end (5) is connected with the solar heat collecting device and the molten salt tank (4), and the molten salt tank (4) is connected with the hot end (5) of the Stirling power generation device (7) through a second molten salt pump.
2. The photo-thermal molten salt heat storage Stirling power generation system according to claim 1, wherein: the cold end (8) is provided with a heat exchange device which exchanges heat through air or water.
3. The photo-thermal molten salt thermal storage Stirling power generation system according to claim 1 or 2, wherein: the molten salt tank (4) of the power generation system is connected with a plurality of solar heat collecting devices, and the molten salt tank (4) can store the heat collected by the plurality of solar heat collecting devices connected with the molten salt tank.
4. The photo-thermal molten salt heat storage Stirling power generation system according to claim 1, wherein: the Stirling power generation device is characterized in that a combustor (6) is arranged on one side of a hot end (5) of the Stirling power generation device (7), and the combustor (6) can heat the hot end (5) to provide heat for the hot end (5) of the Stirling power generation device.
5. The photo-thermal molten salt thermal storage Stirling power generation system according to claim 1 or 2, wherein: the power generation system comprises a molten salt heat exchanger (9), the molten salt heat exchanger (9) is connected with a molten salt tank (4), and molten salt in the molten salt tank (4) can convert water into steam or hot water through the molten salt heat exchanger (9) to supply heat to the outside.
6. The photo-thermal molten salt thermal storage Stirling power generation system according to claim 1 or 2, wherein: the power generation system comprises a molten salt heat exchanger (9), and the molten salt heat exchanger (9) is connected with a molten salt tank (4); the Stirling power generation system and the thermal power generating unit power generation system are arranged in parallel, and part of steam generated by the thermal power generating unit is pumped to the molten salt heat exchanger (9) and transfers heat of the steam to molten salt in the molten salt heat exchanger (9).
7. A photothermal molten salt thermal storage stirling power generation method performed by the photothermal molten salt thermal storage stirling power generation system of claim 1, 2 or 3, characterized in that: the power generation method comprises the following steps:
s1: liquefying the molten salt in the molten salt tank;
s2: determine if there is illumination? If yes, go to step S3; otherwise, go to step S4;
s3: starting the photoelectric molten salt heat storage device, and generating power by the Stirling power generation device driven by the molten salt;
s4: judging whether the heat storage capacity and the molten salt temperature in the molten salt tank can drive the Stirling power generation device? If yes, go to step S5; if not, the Stirling power generation device does not generate power;
s5: and starting the Stirling power generation device driven by the molten salt to generate electricity.
8. The photo-thermal molten salt heat storage Stirling power generation method according to claim 7, characterized in that: the step S3 includes the steps of:
s31: starting the photo-thermal molten salt heat storage device;
s32: the solar heat collection device heats the molten salt to raise the temperature;
s33: and (4) conveying the heated molten salt to the hot end of the external Stirling power generation device, and generating power by the corresponding Stirling power generation device.
9. A photo-thermal molten salt thermal storage stirling power generation method performed by the photo-thermal molten salt thermal storage stirling power generation system of claim 5, wherein: the power generation method comprises the following steps:
s1: liquefying the molten salt in the molten salt tank;
s2: determine if there is illumination? If yes, go to step S3; otherwise, go to step S4;
s3: starting the photo-thermal molten salt heat storage device, and generating electricity by the Stirling power generation device driven by molten salt;
s4: judging whether the heat storage capacity and the molten salt temperature in the molten salt tank can drive the Stirling power generation device? If yes, go to step S5; otherwise, go to step S6;
s5: starting a Stirling power generation device driven by molten salt to generate electricity;
s6: and starting the burner, heating the hot end to heat the molten salt in the hot end, and driving the Stirling power generation device to generate power by the high-temperature molten salt.
10. The photo-thermal molten salt heat storage Stirling power generation method according to claim 9, characterized in that: the step S3 includes the steps of:
s31: starting the photo-thermal molten salt heat storage device;
s32: the solar heat collection device heats the molten salt to raise the temperature;
s33: and (4) conveying the heated molten salt to the hot end of the external Stirling power generation device, and generating power by the corresponding Stirling power generation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810866579.8A CN110792566A (en) | 2018-08-01 | 2018-08-01 | Photo-thermal molten salt heat storage Stirling power generation system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810866579.8A CN110792566A (en) | 2018-08-01 | 2018-08-01 | Photo-thermal molten salt heat storage Stirling power generation system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110792566A true CN110792566A (en) | 2020-02-14 |
Family
ID=69425665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810866579.8A Pending CN110792566A (en) | 2018-08-01 | 2018-08-01 | Photo-thermal molten salt heat storage Stirling power generation system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110792566A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111379678A (en) * | 2018-12-29 | 2020-07-07 | 中国葛洲坝集团装备工业有限公司 | Solar photo-thermal power generation system |
| CN113154924A (en) * | 2021-05-26 | 2021-07-23 | 兰州正德电子科技有限责任公司 | System for utilize hot-air heating granule to carry out energy storage |
-
2018
- 2018-08-01 CN CN201810866579.8A patent/CN110792566A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111379678A (en) * | 2018-12-29 | 2020-07-07 | 中国葛洲坝集团装备工业有限公司 | Solar photo-thermal power generation system |
| CN113154924A (en) * | 2021-05-26 | 2021-07-23 | 兰州正德电子科技有限责任公司 | System for utilize hot-air heating granule to carry out energy storage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Hybrid solar-assisted combined cooling, heating, and power systems: A review | |
| CN208578678U (en) | A kind of improvement Bretton solar-thermal generating system based on linear Nie Feiershi heliostat | |
| CN202100399U (en) | Solar energy and common boiler combined power-generating and heating system | |
| CN101334012B (en) | Distributed solar energy utilization system | |
| CN101702597A (en) | Solar energy high temperature storage type thermal power generation method and device | |
| CN101126503A (en) | Solar energy heat drum boiler and its uses of the boiler in generating set | |
| CN102877980A (en) | Phosgene complementation solar sterling power generating system | |
| CN201786587U (en) | Solar energy power generation system adopting biomass boiler as auxiliary heat source | |
| CN103047778A (en) | Concentrated solar heat energy distributed energy comprehensive utilization system | |
| CN111102143A (en) | Geothermal photo-thermal combined type continuous power generation system | |
| CN202209812U (en) | Combined cooling heating and power tri-generation system assisted by photo-thermal solar energy | |
| CN110792566A (en) | Photo-thermal molten salt heat storage Stirling power generation system and method | |
| CN114593028A (en) | Light-heat-electricity heat-storage power generation system and method for transforming thermal power generating unit | |
| CN202659429U (en) | Solar energy and biomass energy series complementary power generation system | |
| CN201096060Y (en) | Solar energy generator set | |
| CN208349609U (en) | A kind of photo-thermal fused salt accumulation of heat light coal coupled system | |
| CN110108045A (en) | A kind of solar energy power supply device | |
| CN105091356A (en) | Solar concentrating heat collection and conventional energy source coupling power generation system | |
| CN204830511U (en) | Solar energy spotlight thermal -arrest and conventional energy coupling power generation system | |
| CN210087561U (en) | Solar energy-based micro combined cooling, heating and power system | |
| CN211777845U (en) | Geothermal photo-thermal combined type continuous power generation system | |
| CN204961184U (en) | Multistage single screw rod line focus solar thermal energy electricity federation of integrated fused salt heat accumulation supplies system | |
| CN107023446A (en) | It is a kind of using carbon dioxide as heat accumulation and do work working medium Fresnel solar light-heat power-generation system | |
| CN209042494U (en) | A kind of accumulation of energy energy supplying system of providing multiple forms of energy to complement each other based on free power source | |
| CN208803952U (en) | A kind of photo-thermal fused salt accumulation of heat Stirling electricity generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |