CN110513893B - Tower type photo-thermal power station solid heat absorber - Google Patents

Tower type photo-thermal power station solid heat absorber Download PDF

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Publication number
CN110513893B
CN110513893B CN201910810324.4A CN201910810324A CN110513893B CN 110513893 B CN110513893 B CN 110513893B CN 201910810324 A CN201910810324 A CN 201910810324A CN 110513893 B CN110513893 B CN 110513893B
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heat
area
solid
heat absorption
absorber
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CN110513893A (en
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李珊珊
齐志鹏
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Shouhang High Tech Energy Technology Co ltd
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Shouhang High Tech Energy Technology Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/50—Rollable or foldable solar heat collector modules
    • F24S20/55—Rollable or foldable solar heat collector modules made of flexible materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00—Arrangements for storing heat collected by solar heat collectors
    • F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • F24S70/10—Details of absorbing elements characterised by the absorbing material
    • 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

Abstract

The invention provides a solid heat absorber of a tower type photo-thermal power station, which consists of a heat absorbing screen and a driving device. The heat absorption screen moves from top to bottom to absorb solar energy to heat under the action of the driving device, moves to the bottom heat exchange area to exchange heat with the heat storage medium, and continues to be transmitted to the heat absorption area through the low-temperature transmission area after heat exchange is finished, and the circulation is repeated to realize the heat absorption and heat storage processes. The solid heat absorber has the advantages of uniform surface temperature distribution, small stress, low power consumption, realization of higher outlet temperature of the heat absorber and good economic benefit.

Description

Tower type photo-thermal power station solid heat absorber
Technical Field
The invention belongs to the technical field of solar power generation, and particularly relates to a solid heat absorber of a tower type photo-thermal power station.
Background
The heat absorber is one of important equipment of a tower type photo-thermal power station, in a tower type solar thermal power generation system, a solar receiver is a core technology for realizing tower type solar thermal power generation, and the solar receiver directly converts solar energy captured, reflected and focused by a heliostat into high-temperature heat energy which can be efficiently utilized to provide a required heat source or power source for a generator set, thereby realizing the process of solar thermal power generation. At present, the commonly used heat absorbers include a molten salt heat absorber, a water/steam heat absorber and the like, which are all processes of absorbing heat and storing heat through the convection heat transfer of fluid, and the fluid needs internal pressure to maintain the flow of the fluid, so that the heat absorber material is required to have higher strength under the condition of simultaneous action of the internal pressure and high temperature, the requirement on the heat absorber material is extremely high, and the cost is relatively higher.
Disclosure of Invention
In order to solve the problems, the invention provides a solid heat absorber of a tower type photo-thermal power station, which comprises a heat absorption screen and a driving device, wherein the heat absorption screen comprises a heat absorption region, a high-temperature transfer region, a heat exchange region and a low-temperature transfer region, the heat absorption region, the high-temperature transfer region, the heat exchange region and the low-temperature transfer region are sequentially connected, the low-temperature transfer region is also connected with the heat absorption region, and the heat absorption region, the high-temperature transfer region, the heat exchange region and the low-temperature transfer region form a cyclic reciprocating motion through the driving device;
further, the heat absorption zone is used for absorbing solar radiation during movement;
the high-temperature transfer area is used for transferring the heat absorbed by the heat absorption area in a moving way and stopping heat absorption;
the heat exchange area is used for exchanging heat with the heat storage medium;
the low-temperature conveying area is used for being pushed to the heat absorption area by the driving device after heat exchange is finished, and the heat absorption and heat storage are finished by circulating reciprocation;
furthermore, the driving device comprises a driving pulley block and a driven pulley block, the driving pulley block is positioned at the upper part of the solid heat absorber and is close to the low-temperature transfer area part, the driven pulley block is positioned at the lower part of the solid heat absorber and is close to the high-temperature transfer area part, and the heat absorption screen circularly reciprocates in the vertical direction under the pushing of the driving device;
furthermore, the heat absorption area and the heat exchange area are respectively arranged on two sides of a section formed by the driving pulley block and the driven pulley block;
furthermore, the heat absorption screen is formed by tightly arranging a plurality of braided ropes;
furthermore, the braided rope is twisted by single materials or composite twisted by multiple materials;
furthermore, the composite twisted braided rope comprises a heat absorption part and a bearing part, the heat absorption part and the bearing part are in a coating relation or a parallel relation, the heat absorption part is used for absorbing heat and storing heat, the bearing part bears the external force and the self gravity of the braided rope in the running process, and the bearing part is made of a high-strength material;
further, the wrapping relation is that the heat absorption part wraps the outside of the bearing part;
the parallel relation is that a heat absorption part and a bearing part are arranged in parallel, the heat absorption part is close to one side of the heat source, and the bearing part is close to one side of the driving device;
furthermore, the braided rope is made of metal or nonmetal, the metal comprises nickel-based alloy and high-temperature-resistant alloy, the nonmetal comprises ceramic fiber, and the heat storage medium is molten salt or water;
the invention has the following beneficial effects:
1. the invention uses solid material to directly replace fused salt as heat absorbing medium, reduces the fused salt corrosion condition at high temperature, saves the power source required for maintaining the heat absorbing medium flowing in the heat absorbing pipe, and the driving device only needs to overcome the friction force of the braided rope, thus reducing the power consumption.
2. The solid heat absorption screen moves from top to bottom during operation, the surface of the heat absorption screen is uniformly heated, and a region with higher local temperature can not appear.
3. According to the solid heat absorption screen, the solid material directly subjected to solar radiation is not a pressure-bearing part any more, and the high-temperature stress condition of the material is improved, so that the temperature of a heat absorption medium can be higher and can reach 600-800 ℃ or higher.
Drawings
FIG. 1 is a schematic view of a tower-type photothermal power station solid heat absorber of the present invention;
FIG. 2 is a schematic view of an embodiment 1 of a solid heat absorber of a tower type photothermal power station according to the present invention;
fig. 3 is a schematic view of an embodiment 3 of the solid heat absorber of the tower type photothermal power station of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
The invention is further described with reference to the following figures and specific examples, which are not intended to be limiting. The following are preferred examples of the present invention:
as shown in fig. 1 to 3, the present invention provides a solid heat absorber for a tower-type photothermal power station based on improvement of working conditions of local high temperature on the outer surface of a heat absorbing pipe of a pressure bearing member on the surface of the heat absorber and corrosion of a medium in the heat absorbing pipe, wherein the solid heat absorber changes a heat absorbing medium from molten salt to a solid to directly absorb heat, and then exchanges heat between the heat absorbing solid and a heat storage medium to finally store the heat in the heat storage medium.
Example one
As shown in fig. 1, the solid heat absorber of the present invention comprises a heat absorption screen 1 and a driving device 2, wherein the heat absorption screen is formed by tightly arranging a plurality of braided ropes 11, the driving device mainly comprises a driving pulley block 21 and a driven pulley block 22, the driving pulley block 21 is located above the heat absorber, and the driven pulley block 22 is located below the heat absorber. The heat absorption screen is divided into 4 areas, 12 is a heat absorption area, 13 is a high temperature transmission area, 14 is a heat exchange area, and 15 is a low temperature transmission area. When the heat absorption screen 1 is operated, the heat absorption screen 1 moves from top to bottom under the pushing of the driving device 2, in the moving process, the heat absorption area 12 absorbs solar radiation, the temperature of the heat absorption screen weaving rope 11 rises after absorbing heat, the heat absorption screen weaving rope moves to 13 to be a high-temperature conveying area, does not absorb heat, continues to be conveyed to the heat exchange area 14, exchanges heat with a heat storage medium in the area, and continues to be pushed to the heat absorption area 12 by the driving device 2 through the low-temperature conveying area 15 after the heat exchange is completed, and the processes of heat absorption and heat storage are realized in such a circulating.
The braided rope 11 may be twisted from a single material or may be twisted from multiple materials. The composite twisted braided rope comprises a heat absorption part and a bearing part, wherein the heat absorption part and the bearing part are in a wrapping relation or a parallel relation, and the bearing part is made of high-strength materials. The wrapping relation is that the heat absorption part wraps the outside of the bearing part. The parallel relation is that the heat absorption part and the bearing part are arranged in parallel, the heat absorption part is close to one side of the heat source, and the bearing part is close to one side of the driving device. The material of the braided rope can be metal or nonmetal, such as nickel-based alloy, high-temperature-resistant alloy, ceramic fiber and the like, and the heat storage medium can be molten salt, water and the like.
Example 2
As shown in fig. 2, this embodiment is substantially the same as embodiment 1, except that the heat exchange medium is water.
Example 3
As shown in fig. 3, this embodiment is substantially the same as embodiment 1, except that the heat exchange area is located on the ground, and the high temperature transfer zone 13 extends from the heat absorption tower to the ground, and the transfer distance is relatively long.
The above-described embodiment is only one of the preferred embodiments of the present invention, and general changes and substitutions by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a tower light and heat power station solid heat absorber, its characterized in that, the solid heat absorber includes heat absorption screen and drive arrangement, the heat absorption screen is the circulation track to drive arrangement is fixed position, be equipped with heat absorption area, high temperature transfer district, heat transfer area and low temperature transfer area on the circulation track in proper order, heat absorption area, high temperature transfer district, heat transfer area and low temperature transfer area connect gradually, low temperature transfer area still is connected with heat absorption area, high temperature transfer area, heat transfer area and low temperature transfer area form circulation reciprocating motion through drive arrangement.
2. The solid heat sink according to claim 1, wherein the heat sink is configured to absorb solar radiation during movement;
the high-temperature transfer area is used for transferring the heat absorbed by the heat absorption area in a moving way and stopping heat absorption;
the heat exchange area is used for exchanging heat with the heat storage medium;
and the low-temperature conveying area is used for pushing the heat exchange material to the heat absorption area by the driving device after the heat exchange is finished, and the heat absorption and the heat storage are finished by circulating reciprocation.
3. The solid state heat sink of claim 2, wherein the drive means comprises a drive pulley block and a driven pulley block, the drive pulley block is located on the upper portion of the solid state heat sink near the low temperature transport zone portion, the driven pulley block is located on the lower portion of the solid state heat sink near the high temperature transport zone portion, and the heat sink is driven by the drive means to reciprocate cyclically in the vertical direction.
4. The solid heat sink of claim 3, wherein the heat absorbing zone and the heat exchanging zone are disposed on opposite sides of a cross-section formed by the driving pulley set and the driven pulley set, respectively.
5. The solid heat sink of claim 2, wherein the heat sink is comprised of a plurality of braided strands in a close arrangement.
6. The solid heat absorber of claim 5, wherein the braided rope is twisted from a single material or multiple material composite twists.
7. The solid heat absorber of claim 6, wherein the composite twisted braided rope comprises a heat absorbing portion and a load bearing portion, the heat absorbing portion and the load bearing portion are in a wrapping relationship or a side-by-side relationship, the heat absorbing portion is used for absorbing heat and storing heat, the load bearing portion bears external force and self-gravity borne by the braided rope during operation, and the load bearing portion is made of a material with high load bearing strength.
8. The solid heat sink according to claim 7, wherein the cladding relationship is in particular: the heat absorption part is coated outside the bearing part;
the parallel relationship is specifically as follows: the heat absorption part and the bearing part are arranged in parallel, the heat absorption part is close to one side of the heat source, and the bearing part is close to one side of the driving device.
9. The solid heat absorber of claim 5, wherein the braided rope is a metal or a nonmetal, the metal comprises a nickel-based alloy, the nonmetal comprises ceramic fibers, and the heat storage medium is molten salt or water.
CN201910810324.4A 2019-08-29 2019-08-29 Tower type photo-thermal power station solid heat absorber Active CN110513893B (en)

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CN114010957B (en) * 2021-11-30 2023-11-03 固安翌光科技有限公司 Heat recovery system for phototherapy apparatus and control method

Citations (5)

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Publication number Priority date Publication date Assignee Title
WO1993016264A1 (en) * 1990-10-02 1993-08-19 Daniel Seyve Mobile screen device for insulation, lighting, decoration, solar energy collection purposes
CN201525876U (en) * 2009-05-26 2010-07-14 吴江市宇欣电器有限公司 Tower type solar energy titanium sponge smelting system
CN201527118U (en) * 2009-05-26 2010-07-14 吴江市宇欣电器有限公司 Hot smelting system
CN104654609A (en) * 2013-11-17 2015-05-27 成都奥能普科技有限公司 Solid particle block tower type solar heating heat transfer system
CN105318577A (en) * 2015-02-07 2016-02-10 成都奥能普科技有限公司 Solid particle block tower-type solar fluidization driven heat-exchange and heat-transmission system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993016264A1 (en) * 1990-10-02 1993-08-19 Daniel Seyve Mobile screen device for insulation, lighting, decoration, solar energy collection purposes
CN201525876U (en) * 2009-05-26 2010-07-14 吴江市宇欣电器有限公司 Tower type solar energy titanium sponge smelting system
CN201527118U (en) * 2009-05-26 2010-07-14 吴江市宇欣电器有限公司 Hot smelting system
CN104654609A (en) * 2013-11-17 2015-05-27 成都奥能普科技有限公司 Solid particle block tower type solar heating heat transfer system
CN105318577A (en) * 2015-02-07 2016-02-10 成都奥能普科技有限公司 Solid particle block tower-type solar fluidization driven heat-exchange and heat-transmission system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
塔式太阳能热发电吸热体材料研究进展;吴建锋等;《材料导报》;20130731;第27卷(第7期);57-60 *
塔式太阳能热发电吸热器技术研究进展;杨敏林等;《科学技术与工程》;20080531;第8卷(第10期);2632-2638 *

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