CN211474347U - Power generation system - Google Patents
Power generation system Download PDFInfo
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- CN211474347U CN211474347U CN202020167850.1U CN202020167850U CN211474347U CN 211474347 U CN211474347 U CN 211474347U CN 202020167850 U CN202020167850 U CN 202020167850U CN 211474347 U CN211474347 U CN 211474347U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The utility model provides a power generation system, include: the system comprises a groove type solar heat collector, a first heat exchanger, a second heat exchanger, an energy storage device and a conventional island, wherein the groove type solar heat collector and the first heat exchanger are connected through a pipeline to form a first loop; the first heat exchanger, the second heat exchanger and the energy storage device are connected through pipelines to form a second loop; the conventional island and the first heat exchanger are connected through a pipeline to form a third loop; the energy storage device is used for storing heat energy, the first loop and the second loop exchange heat through the first heat exchanger, and the second loop and the third loop exchange heat through the second heat exchanger. The embodiment of the utility model provides a make the conduction oil in the first loop to the one-way heat transfer of fused salt in the second loop all the time, simplified slot type solar thermal power generation system's structure.
Description
Technical Field
The utility model relates to a power generation technical field especially relates to a power generation system.
Background
With the exhaustion of fossil energy, the energy problem has become more and more prominent, and the search for new energy with cleaner energy regeneration is an urgent issue facing human beings at present, so the solar power generation technology has received more and more attention.
The development of solar power generation technology is mature day by day, and two main forms of solar light power generation and solar heat power generation are derived. The solar thermal power generation mainly comprises a groove type, a tower type, a disc type, a Fresnel type and the like, the thermal efficiency is high at high temperature, and meanwhile, the energy is conveniently stored by adopting a cheap heat storage technology.
The conventional trough-type solar thermal power generation system generally comprises a trough-type solar thermal collector, an oil-water heat exchanger, an oil-salt heat exchanger, an energy storage device and a conventional island, wherein the trough-type solar thermal collector and the oil-water heat exchanger are connected through a pipeline to form a first loop, the conventional island and the oil-water heat exchanger are connected through a pipeline to form a second loop, and the first loop and the second loop exchange heat through the oil-water heat exchanger; the groove type solar heat collector and the oil-salt heat exchanger are connected through a pipeline to form a third loop, the energy storage device is connected with the oil-salt heat exchanger through a pipeline, and the energy storage device and the third loop exchange heat through the oil-salt heat exchanger to store heat energy.
The existing trough-type solar thermal power generation system conveys a part of heat conducting oil heated by a heat collector into an oil-salt heat exchanger, transfers heat to molten salt, and stores high-temperature molten salt in an energy storage device; and the other part of the heat conducting oil is conveyed to an oil-water heat exchanger, heat is transferred to working medium water, and high-temperature steam is used for generating power. When the generated energy is insufficient, the high-temperature molten salt stored in the energy storage device enters the oil-salt heat exchanger to transfer heat to the heat conduction oil, and the heat conduction oil enters the oil-water heat exchanger to transfer heat to the working medium water to generate electricity by using high-temperature steam. This kind of mode needs to carry out the two-way heat transfer of conduction oil and fused salt, consequently needs to set up more pipeline, valve and liquid pump, and two-way heat transfer is also comparatively complicated to the control of valve and liquid pump. It can be seen that the structure of the existing trough-type solar thermal power generation system is complex.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a power generation system to solve the more complicated problem of structure of current slot type solar thermal power generation system.
An embodiment of the utility model provides a power generation system, include:
the system comprises a groove type solar heat collector, a first heat exchanger, a second heat exchanger, an energy storage device and a conventional island, wherein the groove type solar heat collector and the first heat exchanger are connected through a pipeline to form a first loop; the first heat exchanger, the second heat exchanger and the energy storage device are connected through pipelines to form a second loop; the conventional island and the first heat exchanger are connected through a pipeline to form a third loop; the energy storage device is used for storing heat energy, the first loop and the second loop exchange heat through the first heat exchanger, and the second loop and the third loop exchange heat through the second heat exchanger.
Optionally, in the first loop, an outlet end of the trough solar collector is connected to the first inlet end of the first heat exchanger through a first switching valve, and an inlet end of the trough solar collector is connected to the first outlet end of the first heat exchanger;
in the second loop, the energy storage device comprises a first energy storage device and a second energy storage device, the inlet end of the first energy storage device is connected with the second outlet end of the first heat exchanger, and the outlet end of the first energy storage device is connected with the first inlet end of the second heat exchanger through a second switch valve; the inlet end of the second energy storage device is connected with the first outlet end of the second heat exchanger through a third switch valve, and the outlet end of the second energy storage device is connected with the second inlet end of the first heat exchanger through a fourth switch valve.
Optionally, in the third loop, the conventional island includes a steam turbine, a generator and a steam condenser, a second outlet end of the second heat exchanger is connected to the steam turbine, the steam turbine is connected to the generator, and a second inlet end of the second heat exchanger is connected to an outlet end of the steam condenser.
Optionally, the first heat exchanger is an oil-salt heat exchanger, and the second heat exchanger is a salt-water heat exchanger.
Optionally, the trough type solar heat collector is a parabolic trough type solar heat collector.
Optionally, an electric heat tracing assembly is arranged on the pipeline of the second loop.
Optionally, an immersion electric heater is disposed in each of the first energy storage device and the second energy storage device.
The embodiment of the utility model provides a through pass through the pipeline connection formation primary circuit with slot type solar collector with first heat exchanger; the first heat exchanger, the second heat exchanger and the energy storage device are connected through pipelines to form a second loop; the conventional island and the first heat exchanger are connected through a pipeline to form a third loop, the first loop and the second loop exchange heat through the first heat exchanger, and the second loop and the third loop exchange heat through the second heat exchanger, so that heat conduction oil in the first loop always conducts heat to molten salt in the second loop in a one-way mode, and the structure of the trough type solar thermal power generation system is simplified.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a power generation system provided by an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1, an embodiment of the present invention provides a power generation system, including:
the system comprises a trough type solar thermal collector 10, a first heat exchanger 11, a second heat exchanger 12, an energy storage device 13 and a conventional island 14, wherein the trough type solar thermal collector 10 and the first heat exchanger 11 are connected through a pipeline to form a first loop; the first heat exchanger 11, the second heat exchanger 12 and the energy storage device 13 are connected through pipelines to form a second loop; the conventional island 14 and the first heat exchanger 11 are connected through a pipeline to form a third loop; the energy storage device 13 is configured to store heat energy, the first loop and the second loop exchange heat through the first heat exchanger 11, and the second loop and the third loop exchange heat through the second heat exchanger 12.
The heat absorbing and transferring medium in the first loop may be heat conducting oil, and the heat absorbing and transferring medium may be 73.5% diphenyl ether + 26.5% biphenyl or organosilicon. The amount of the heat conducting oil entering the first heat exchanger 11 may be set according to a required power generation amount, and may be part or all of the heat conducting oil in the trough solar collector 10. The heat conducting oil absorbs heat in the groove type solar heat collector 10 to a certain temperature, then is circularly transmitted in the first loop, and exchanges heat with the molten salt in the second loop through the first heat exchanger 11.
The heat storage medium in the energy storage device 13 may be binary molten salt (with a composition of 40% KNO)3+60％NaNO3) Ternary molten salt (component 7% NaNO)3+53％KNO3+40％NaNO2) And ternary molten salt (45% KNO)3+48％Ca(NO3)2+7NaNO3) And others with KNO3、NaNO3、NaNO2、Ca(NO3)2And the like as a constituent. The molten salt can exchange heat with high-temperature heat conduction oil through the first heat exchanger 11 in the second loop, and is stored in the energy storage device 13. When power generation is needed, the high-temperature molten salt stored in the energy storage device 13 exchanges heat with working medium water in the third loop through the second heat exchanger 12, and then heat energy is converted into electric energy through the conventional island 14 in the third loop to generate power.
In the embodiment of the utility model, the groove type solar heat collector 10 and the first heat exchanger 11 are connected through a pipeline to form a first loop; the first heat exchanger 11, the second heat exchanger 12 and the energy storage device 13 are connected through pipelines to form a second loop; the conventional island 14 and the first heat exchanger 11 are connected through a pipeline to form a third loop, the first loop and the second loop exchange heat through the first heat exchanger 11, and the second loop and the third loop exchange heat through the second heat exchanger 12, so that heat conduction oil in the first loop conducts heat to molten salt in the second loop in a one-way mode all the time, the first heat exchanger 11 runs in a one-way mode all the time, and the structure of the groove type solar thermal power generation system is simplified.
Further, in the first circuit, the outlet end of the trough solar collector 10 may be connected to the first inlet end of the first heat exchanger 11 through a first switching valve 21, and the inlet end of the trough solar collector 10 is connected to the first outlet end of the first heat exchanger 11.
In the second loop, the energy storage device 13 may include a first energy storage device 131 and a second energy storage device 132, an inlet end of the first energy storage device 131 is connected to the second outlet end of the first heat exchanger 11, and an outlet end of the first energy storage device 131 is connected to the first inlet end of the second heat exchanger 12 through a second switching valve 22; an inlet end of the second energy storage device 132 is connected to a first outlet end of the second heat exchanger 12 through a third on-off valve 23, and an outlet end of the second energy storage device 132 is connected to a second inlet end of the first heat exchanger 11 through a fourth on-off valve 24.
In the operation process of the power generation system, the molten salt in the second energy storage device 132 may be transported to the first heat exchanger 11 through a pipeline, exchanges heat with the heat transfer oil, transfers heat in the heat transfer oil to the molten salt, and then transports the heated molten salt to the first energy storage device 131 through a pipeline, thereby realizing the storage of heat energy.
Further, in the third circuit, the conventional island 14 may include a turbine 141, a generator 142, and a condenser 143, a second outlet end of the second heat exchanger 12 is connected to the turbine 141, the turbine 141 is connected to the generator 142, and a second inlet end of the second heat exchanger 12 is connected to an outlet end of the condenser 143.
In the operation process of the power generation system, the molten salt stored in the first energy storage device 131 can be transmitted to the second heat exchanger 12 through a pipeline, and heat is transferred to the working medium water in the third loop, so that the working medium water is heated and vaporized into qualified high-temperature high-pressure steam, and the qualified high-temperature high-pressure steam enters the steam turbine 141 to do work, and finally the power is generated through the generator 142. After that, the exhaust gas of the steam turbine 141 is condensed into water by the steam condenser 143 and is continuously circulated in the second circuit.
It is understood that the first heat exchanger 11 is an oil-salt heat exchanger for exchanging heat between the heat conducting oil and the molten salt. The second heat exchanger 12 is a salt-water heat exchanger for exchanging heat between the heat transfer oil and the working fluid water, thereby generating high-temperature steam.
Specifically, the first heat exchanger 11 and the second heat exchanger 12 may be configured according to actual needs. In an embodiment of the present invention, the first heat exchanger 11 and the second heat exchanger 12 may be shell-and-tube heat exchangers; in another embodiment, the first heat exchanger 11 and the second heat exchanger 12 may be a double pipe heat exchanger or another type of heat exchanger.
In order to increase the heat collection efficiency of the trough solar collector 10, the trough solar collector 10 may be a parabolic trough solar collector 10.
Further, in order to prevent the molten salt from solidifying below the freezing point, an immersion electric heater may be disposed in each of the first energy storage device 131 and the second energy storage device 132. An electric tracing assembly may be disposed on a pipeline connecting the energy storage device 13 and the second heat exchanger 12, and an electric tracing assembly may be disposed on a pipeline connecting the energy storage device 13 and the hydrogen storage device.
For better understanding of the present invention, a detailed implementation of the present invention will be described in detail in the following with an embodiment.
In one embodiment, the trough solar collector 10 first converts light energy into heat energy through focusing, reflecting, and absorbing processes, so that the heat conducting oil is heated to a certain temperature.
In the daytime, when sunlight is abundant, the low-temperature heat conduction oil in the groove type solar heat collector 10 is heated by focused solar direct radiation heat energy to become high-temperature heat conduction oil, the first switch valve 21 is opened, and the high-temperature heat conduction oil enters the first heat exchanger 11 through the first loop. And opening the fourth switch valve 24, conveying the molten salt in the second energy storage device 132 to the first heat exchanger 11 through the second loop, and transferring the heat of the heat conduction oil to the molten salt in the second loop through the first heat exchanger 11. The heated molten salt is transported to the first energy storage device 131 through a pipeline for storage, and the cooled heat conduction oil is continuously heated in a heat collection field through which the heat conduction oil enters by the heat conduction oil circulating pump.
And opening the second switch valve 22 and the third switch valve 23, conveying part or all of the high-temperature molten salt stored in the first energy storage device 131 to the second heat exchanger 12 by the molten salt pump according to the actual power consumption demand, exchanging heat with the working medium water of the third loop, transferring heat to the working medium water, enabling the working medium water to be heated and vaporized into qualified high-temperature high-pressure steam, enabling the qualified high-temperature high-pressure steam to enter the steam turbine 141 to do work, generating power by the generator 142, and cooling the steam discharged by the steam turbine 141 into feed water by the steam condenser 143. The cooled molten salt after heat exchange is then transported back to the second energy storage device 132 through a pipeline.
At night or when sunlight is insufficient, the groove type solar heat collector 10 stops working, the second switch valve 22 and the third switch valve 23 are opened, high-temperature molten salt stored in the first energy storage device 11 is pumped out through a molten salt pump, heat exchange is carried out between the high-temperature molten salt and working medium water of the third loop through the second heat exchanger, heat is transferred to the working medium water, the working medium water is heated and vaporized into qualified high-temperature high-pressure steam, the high-temperature high-pressure steam enters the steam turbine 141 to do work, power is generated through the generator 142, and steam discharged by the steam turbine 141 is cooled to be water supply through the steam condenser 143. The high temperature molten salt is cooled and enters the second energy storage device 132.
The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A power generation system, comprising:
the system comprises a groove type solar heat collector, a first heat exchanger, a second heat exchanger, an energy storage device and a conventional island, wherein the groove type solar heat collector and the first heat exchanger are connected through a pipeline to form a first loop; the first heat exchanger, the second heat exchanger and the energy storage device are connected through pipelines to form a second loop; the conventional island and the first heat exchanger are connected through a pipeline to form a third loop; the energy storage device is used for storing heat energy, the first loop and the second loop exchange heat through the first heat exchanger, and the second loop and the third loop exchange heat through the second heat exchanger.
2. The power generation system of claim 1, wherein in the first loop, the outlet end of the trough solar collector is connected to the first inlet end of the first heat exchanger through a first switching valve, and the inlet end of the trough solar collector is connected to the first outlet end of the first heat exchanger;
in the second loop, the energy storage device comprises a first energy storage device and a second energy storage device, the inlet end of the first energy storage device is connected with the second outlet end of the first heat exchanger, and the outlet end of the first energy storage device is connected with the first inlet end of the second heat exchanger through a second switch valve; the inlet end of the second energy storage device is connected with the first outlet end of the second heat exchanger through a third switch valve, and the outlet end of the second energy storage device is connected with the second inlet end of the first heat exchanger through a fourth switch valve.
3. The power generation system of claim 1, wherein in the third circuit, the conventional island includes a steam turbine, a generator, and a steam condenser, the second outlet end of the second heat exchanger is connected to the steam turbine, the steam turbine is connected to the generator, and the second inlet end of the second heat exchanger is connected to the outlet end of the steam condenser.
4. The power generation system of claim 1, wherein the first heat exchanger is an oil-salt heat exchanger and the second heat exchanger is a salt-water heat exchanger.
5. The power generation system of claim 1, wherein the trough solar collector is a parabolic trough solar collector.
6. The power generation system of claim 1, wherein the piping of the second circuit has an electrical trace heating assembly disposed thereon.
7. The power generation system of claim 2, wherein both the first energy storage device and the second energy storage device have an electric immersion heater disposed therein.
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| CN202020167850.1U CN211474347U (en) | 2020-02-13 | 2020-02-13 | Power generation system |
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| CN202020167850.1U CN211474347U (en) | 2020-02-13 | 2020-02-13 | Power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024085819A1 (en) * | 2022-10-19 | 2024-04-25 | Oeztuerk Saffet | A solar-powered power generation system to generate electricity from water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024085819A1 (en) * | 2022-10-19 | 2024-04-25 | Oeztuerk Saffet | A solar-powered power generation system to generate electricity from water |
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