CN112178947A - Tower type solar light-gathering and heat-absorbing system - Google Patents
Tower type solar light-gathering and heat-absorbing system Download PDFInfo
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- CN112178947A CN112178947A CN202011004385.0A CN202011004385A CN112178947A CN 112178947 A CN112178947 A CN 112178947A CN 202011004385 A CN202011004385 A CN 202011004385A CN 112178947 A CN112178947 A CN 112178947A
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- heat
- light
- gathering
- positive displacement
- absorber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/30—Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/60—Arrangements for draining the working fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/60—Thermal insulation
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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
- Y02E10/44—Heat exchange systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
A tower-type solar light-gathering and heat-absorbing system is composed of a light-gathering system and a positive-displacement heat absorber. Compared with the traditional tower type light-gathering and heat-absorbing system, the light-gathering device is placed in soil on the ground or below the ground in a light-gathering secondary reflection mode, the static load of a tower type supporting structure is reduced, the length of an outdoor water pipeline is reduced, and the risk of freezing the pipeline is reduced. The light-transmitting cover plate is arranged at the top of the positive displacement heat absorber, so that the light-transmitting cover plate basically does not bear pressure, a thin light-transmitting cover plate can be used, the transmittance of solar radiation is improved, and the heat absorption efficiency is improved. The porous heat absorbing material is arranged at the lower part in the positive displacement heat absorber, which is beneficial to realizing the convection enhanced heat transfer of the internal fluid and realizing the rapid temperature rise of the internal heat transfer medium. The tower type light-gathering heat absorption system has wide applicability in regions with abundant and richer solar energy resources in northern China.
Description
Technical Field
The invention relates to a solar light-gathering and heat-absorbing system.
Background
Solar energy is an inexhaustible renewable energy source, and at present, fossil fuels are reduced year by year, and international energy source situation is severe day by day, the development and utilization of solar energy is one of important ways for realizing diversification of energy supply and ensuring energy safety. The solar energy light-gathering heat-absorbing system is a heat energy conversion system which can convert solar heat into heat of a heat transfer medium, and can be widely applied to systems of solar energy heat supply, industrial heat utilization and the like.
The solar light-gathering and heat-absorbing system has multiple light-gathering forms such as a tower type, a groove type and a Fresnel type, wherein the tower type is more suitable for mountain landforms, the land resources in China are small in land, and the tower type light-gathering system suitable for the mountain landforms is one of important heat-gathering modes for developing solar heat utilization in the future.
Patent 201110425035.6 "a plate type heat absorber for tower type solar thermal power generation" relates to a plate type heat absorber for tower type solar thermal power generation, which comprises a heat absorbing plate and at least one flat plate or groove type bent plate which does not directly absorb radiation. The heat absorbing plate and the flat plate or the groove-type bent plate which do not absorb radiation are arranged in parallel and in a short distance, and a long and narrow crack formed between the heat absorbing plate and the flat plate or the groove-type bent plate is used as a long and narrow channel for circulation of heat absorbing working medium. The long and narrow channel is connected with the inlet and outlet pipes of the heat absorber through a tapered flat channel respectively at the upstream and downstream of the heat absorbing working medium. The heat absorption plate is coated with a high-absorptivity coating on the surface facing to solar radiation, and a turbulence element is arranged on the surface facing to a heat absorption channel. The heat absorbing plate is arranged on the daylight opening or inside the heat absorber far away from the daylight opening. The invention can be used for medium and high temperature solar thermal power generation and other medium and high temperature solar thermal utilization fields. This patent is clearly different in structure from the present invention.
Patent 201610902614.8 tower solar heat absorber heating surface module of pipe back spotlight discloses a tower solar heat absorber heating surface module of pipe back spotlight, including collection case, connecting tube row, last connecting tube row, go up collection case and heat absorption tube panel down, heat absorption tube panel lower extreme is connected through connecting tube row with collection case down, heat absorption tube panel upper end is connected through last connecting tube row with last collection case. A certain gap is reserved between adjacent tubes in the heat absorption tube panel, and the backlight surface of each tube of the heat absorption tube panel is provided with a respective concave curved surface with a reflection function to incoming light. The invention reduces the heating concentration ratio of the tube, thereby reducing the difference of the heating of the tube to the light side and the backlight side, and relieving the problems of serious deformation and overhigh bearing stress caused by uneven heating of the tube to the light side and the backlight side; the invention reduces the pipe wall temperature of the front surface point area of the pipe, thereby increasing the safety margin of the operation of the heating surface. This patent uses a tubular heat sink.
Patent 200580047405.X "volumetric solar receiver" relates to a volumetric solar receiver, including heat absorption chamber, glass window to and communicate in the working fluid import pipe and the outlet pipe of heat absorption chamber, this glass window comprises double-deck cavity glass, and the well hollow part wherein forms the inner chamber, and this inner chamber is equipped with the export that communicates in the heat absorption chamber, working fluid import pipe communicate in this inner chamber and through the export of this inner chamber communicate in the heat absorption chamber.
Patent 201410495002.2 volumetric air heat absorber with rotary heat absorber relates to volumetric air heat absorber with rotary heat absorber, whose heat absorber is composed of multiple rotary heat absorbing rods. The heat absorption rod consists of a plurality of heat absorption cylinders and a rotating shaft. The heat absorbing cylinder is a hollow concentric cylindrical cylinder body and is integrally formed by silicon carbide foamed ceramics. The inner wall of the heat absorption cylinder is provided with a clamping groove. The axis of rotation is the cylinder, and there is the arch outside of axis of rotation, draw-in groove and arch closely cooperate. The rotating shaft is integrally formed by compact high-temperature-resistant ceramic or heat-resistant alloy steel. The axis of the rotating shaft coincides with the axis of the heat absorbing cylinder, and the heat absorbing cylinder is sleeved outside the rotating shaft. The invention can obtain high-temperature air with the temperature range of 700-1300 ℃ and the pressure of normal pressure or more than 1MPa, simultaneously stores heat by utilizing self sensible heat, can be used for a cavity type non-pressure-bearing and non-pressure-bearing air heat absorber and can also be used for an external cylindrical non-pressure-bearing air heat absorber. This patent uses air as the heat transfer medium.
Patent 201620560955.7 "high-efficient U type pipe positive displacement heat exchanger" discloses a high-efficient U type pipe positive displacement heat exchanger, including a water injection case and a heat medium module, separate the water injection case with polylith return stroke baffle, form a plurality of return stroke mixing chamber, like this, make heat medium and cold water form strong countercurrent and cross-flow, thereby form the perfect heat transfer flow mode in the heat transfer science, the reynolds coefficient has been improved to strong countercurrent and cross-flow, heat transfer membrane coefficient has been strengthened, make the heat medium fully exothermic, cold water fully absorbs heat, thereby improve thermal efficiency and energy utilization. The patent adopts the staggered arrangement of U tubes as a means for enhancing heat transfer.
Disclosure of Invention
The invention aims to provide a tower type solar light-gathering and heat-absorbing system which converts solar heat into heat energy of a heat transfer medium and provides a heat source for the fields of building heat supply, industrial heat utilization and the like.
The technical scheme of the invention is as follows:
the tower type solar light-gathering and heat-absorbing system consists of a light-gathering system and a positive-displacement heat absorber.
Wherein the content of the first and second substances,
the light condensing system consists of a heliostat, a reflector and a tower type supporting structure;
the positive displacement heat absorber comprises a light-transmitting cover plate, a porous heat absorbing material, a heat insulation frame, a water inlet pipe, a water outlet pipe, a blow-off pipe, an air valve, a heat absorber supporting structure and a protection plate. The upper side part of the heat-insulating frame is connected with a water outlet pipe, the lower side part of the heat-insulating frame is connected with a water inlet pipe, and the bottom of the heat-insulating frame is connected with a sewage discharge pipe; the light-transmitting cover plate is connected with the top of the heat-insulating frame; an air valve is arranged on the light-transmitting cover plate; the heat absorber supporting structure is arranged at the bottom of the heat preservation frame; the protection plate is positioned at the top of the positive displacement heat absorber and around the light-transmitting cover plate.
The porous heat absorbing material is arranged in the positive displacement heat absorber to realize convection enhanced heat transfer of the internal heat transfer fluid.
The positive displacement heat absorber can be arranged below the ground level and in the soil or basement equipment room.
The heat transfer working medium used by the positive displacement heat absorber can be low-temperature heat transfer working media such as water and the like, or high-temperature resistant heat transfer working media such as molten salt, heat conduction oil and the like.
The working principle and the working process of the invention are as follows:
when the solar resource condition is better, the heliostat reflects the direct solar radiation to the reflector, the reflector reflects the direct solar radiation to the light-transmitting cover plate, most of the solar radiation penetrates through the light-transmitting cover plate, one part of the solar radiation is absorbed by the heat transfer medium in the positive-displacement heat absorber, the other part of the solar radiation is absorbed by the porous heat absorbing material, the heat transfer medium is continuously heated in a convection mode, when the set temperature requirement is met, the heat transfer medium with higher temperature flows out of the water outlet pipe, the heat transfer medium with lower temperature flows in of the water inlet pipe, and the solar radiation is heated in cycles.
When the fluid in the positive displacement heat absorber has excessive impurities, the sewage after cleaning is discharged from the sewage discharge pipe. In addition, in order to reduce the heat loss of the positive displacement heat absorber during operation, the positive displacement heat absorber must adopt a heat-insulating frame, and a bridge-cut-off measure is adopted at the position where a heat bridge is easy to generate, such as the joint of a water inlet pipe, a water outlet pipe, a drain pipe, a light-transmitting cover plate and the heat-insulating frame. The air valve can ensure that the phenomenon of overlarge pressure cannot occur in the positive displacement heat absorber.
Compared with the traditional tower type light-gathering and heat-absorbing system, the light-gathering device is placed on the ground or in the soil below the ground in a light-gathering secondary reflection mode, so that the static load of a tower type supporting structure is reduced, the length of an outdoor water pipeline is reduced, and the risk of freezing the pipeline is reduced; the light-transmitting cover plate is arranged at the top of the positive displacement heat absorber, so that the light-transmitting cover plate basically does not bear pressure, a thinner light-transmitting cover plate can be used, the transmittance of solar radiation is further improved, and the heat absorption efficiency is further improved; the porous heat absorbing material is arranged at the lower part in the positive displacement heat absorber, which is beneficial to realizing the convection enhanced heat transfer of the internal fluid and realizing the rapid temperature rise of the internal heat transfer medium. The tower type light-gathering heat absorption system has wide applicability in regions with abundant and richer solar energy resources in northern China.
Drawings
FIG. 1 is a schematic structural diagram of a tower-type light-gathering and heat-absorbing system according to the present invention;
in the figure: 1 heliostat, 2 reflectors, 3 tower-type supporting structures, 4 light-transmitting cover plates, 5 porous heat-absorbing materials, 6 heat-insulating frames, 7 water inlet pipes, 8 water outlet pipes, 9 blow-off pipes, 10 air valves, 11 heat absorber supporting structures and 12 protection plates.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1, the tower-type solar energy light-gathering and heat-absorbing system is composed of a light-gathering system and a positive displacement heat absorber.
Wherein the content of the first and second substances,
the light condensation system consists of a heliostat 1, a reflecting mirror 2 and a tower type supporting structure 3;
the positive displacement heat absorber comprises a light-transmitting cover plate 4, a porous heat absorbing material 5, a heat insulation frame 6, a water inlet pipe 7, a water outlet pipe 8, a blow-off pipe 9, an air valve 10, a heat absorber supporting structure 11 and a protection plate 12. The upper side part of the heat insulation frame 6 is connected with a water outlet pipe 8, the lower side part is connected with a water inlet pipe 7, and the bottom part is connected with a sewage discharge pipe 9; the light-transmitting cover plate 4 is connected with the top of the heat-insulating frame 6; an air valve 10 is arranged on the light-transmitting cover plate 4; the absorber supporting structure 11 is arranged at the bottom of the heat preservation frame 6; the protective plate 12 is positioned on the top of the positive displacement heat absorber and around the light-transmitting cover plate 4.
The porous heat absorbing material 5 is arranged in the positive displacement heat absorber to realize convection enhanced heat transfer of the internal heat transfer fluid.
The positive displacement heat absorber can be arranged below the ground level and in the soil or basement equipment room.
The heat transfer working medium used by the positive displacement heat absorber can be low-temperature heat transfer working media such as water and the like, or high-temperature resistant heat transfer working media such as molten salt, heat conduction oil and the like.
The working principle and the working process of the system are as follows:
when the solar energy resource condition is better, the heliostat 1 reflects the direct solar radiation to the reflector 2, the reflector 2 reflects the direct solar radiation to the light-transmitting cover plate 4, most of the solar radiation penetrates through the light-transmitting cover plate 4, one part of the solar radiation is absorbed by the heat transfer medium in the positive-displacement heat absorber, the other part of the solar radiation is absorbed by the porous heat absorbing material 5, the heat transfer medium is continuously heated in a convection mode, when the set temperature requirement is met, the heat transfer medium with higher temperature flows out of the water outlet pipe 8, the heat transfer medium with lower temperature flows in of the water inlet pipe 7, and the solar radiation is heated in cycles.
When the fluid in the positive displacement heat absorber has excessive impurities, the sewage after cleaning is discharged from the sewage discharge pipe 9. In addition, in order to reduce the heat loss of the positive displacement heat absorber during operation, the positive displacement heat absorber must adopt the heat-insulating frame 6, and a bridge-cut measure is used at the position where a heat bridge is easy to generate, such as the connection position of a water inlet pipe, a water outlet pipe, a drain pipe, a light-transmitting cover plate and the heat-insulating frame. The gas valve 10 ensures that overpressure does not occur in the positive displacement heat sink.
Compared with the traditional tower type light-gathering and heat-absorbing system, the invention has the advantages that: the condenser is placed in soil on the ground or below the ground in a condensation secondary reflection mode, so that the static load of the tower type supporting structure 3 is reduced, the length of an outdoor water pipeline is reduced, and the risk of freezing the pipeline is reduced; the light-transmitting cover plate 4 is arranged at the top of the positive displacement heat absorber, so that the light-transmitting cover plate basically does not bear pressure, a thinner light-transmitting cover plate 4 can be used, the transmittance of solar radiation is improved, and the heat absorption efficiency is improved; the porous heat absorbing material 5 is arranged at the lower part inside the positive displacement heat absorber, which is beneficial to realizing convection enhanced heat transfer of internal fluid and realizing rapid temperature rise of internal heat transfer medium. The tower type light-gathering heat absorption system has wide applicability in regions with abundant and richer solar energy resources in northern China.
Claims (4)
1. A tower solar energy spotlight heat absorption system which characterized in that: the tower type solar light-gathering and heat-absorbing system consists of a light-gathering system and a positive displacement heat absorber;
the light condensation system consists of a heliostat (1), a reflecting mirror (2) and a tower type supporting structure (3);
the positive displacement heat absorber consists of a light-transmitting cover plate (4), a porous heat absorbing material (5), a heat insulation frame (6), a water inlet pipe (7), a water outlet pipe (8), a blow-off pipe (9), an air valve (10), a heat absorber supporting structure (11) and a protection plate (12);
the upper side part of the heat insulation frame (6) is connected with a water outlet pipe (8), the lower side part is connected with a water inlet pipe (7), and the bottom part is connected with a sewage discharge pipe (9); the light-transmitting cover plate (4) is connected with the top of the heat-insulating frame (6); an air valve (10) is arranged on the light-transmitting cover plate (4); the heat absorber supporting structure (11) is arranged at the bottom of the heat preservation frame (6); the protection plate (10) is positioned at the top of the positive displacement heat absorber and around the transparent cover plate (4).
2. The tower solar concentrating and heat absorbing system of claim 1, wherein: the porous heat absorbing material (5) is arranged in the positive displacement heat absorber to realize convection enhanced heat transfer of the internal heat transfer fluid.
3. The tower solar concentrating and heat absorbing system of claim 1, wherein: the positive displacement heat absorber is placed below ground level or in the soil or basement equipment room.
4. The tower solar concentrating and heat absorbing system of claim 1, wherein: the heat transfer working medium in the positive displacement heat absorber is water or molten salt or heat transfer oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004385.0A CN112178947A (en) | 2020-09-22 | 2020-09-22 | Tower type solar light-gathering and heat-absorbing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004385.0A CN112178947A (en) | 2020-09-22 | 2020-09-22 | Tower type solar light-gathering and heat-absorbing system |
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| CN112178947A true CN112178947A (en) | 2021-01-05 |
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| CN202011004385.0A Pending CN112178947A (en) | 2020-09-22 | 2020-09-22 | Tower type solar light-gathering and heat-absorbing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390190A (en) * | 2021-07-14 | 2021-09-14 | 吉林建筑大学 | Secondary reflection type particle heat absorber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111728A (en) * | 2005-01-27 | 2008-01-23 | 张耀明 | Positive displacement solar receiver |
| CN102852742A (en) * | 2012-08-30 | 2013-01-02 | 中国科学院电工研究所 | Tower type solar thermal power generation system for heat absorber of vacuum heat absorption pipes |
| CN103712355A (en) * | 2013-12-25 | 2014-04-09 | 青海中控太阳能发电有限公司 | Efficient protective cover for tower-type solar heat absorber |
| CN104197537A (en) * | 2014-09-24 | 2014-12-10 | 中国科学院电工研究所 | Positive displacement air thermal absorber with rotary heat absorption body |
| CN108444118A (en) * | 2018-04-27 | 2018-08-24 | 广东五星太阳能股份有限公司 | A kind of tower optically focused endothermic system |
-
2020
- 2020-09-22 CN CN202011004385.0A patent/CN112178947A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111728A (en) * | 2005-01-27 | 2008-01-23 | 张耀明 | Positive displacement solar receiver |
| CN102852742A (en) * | 2012-08-30 | 2013-01-02 | 中国科学院电工研究所 | Tower type solar thermal power generation system for heat absorber of vacuum heat absorption pipes |
| CN103712355A (en) * | 2013-12-25 | 2014-04-09 | 青海中控太阳能发电有限公司 | Efficient protective cover for tower-type solar heat absorber |
| CN104197537A (en) * | 2014-09-24 | 2014-12-10 | 中国科学院电工研究所 | Positive displacement air thermal absorber with rotary heat absorption body |
| CN108444118A (en) * | 2018-04-27 | 2018-08-24 | 广东五星太阳能股份有限公司 | A kind of tower optically focused endothermic system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390190A (en) * | 2021-07-14 | 2021-09-14 | 吉林建筑大学 | Secondary reflection type particle heat absorber |
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Application publication date: 20210105 |