CN102155365A - Hot-sand-heat-accumulating solar disc type Stirling engine generating set and method thereof - Google Patents
Hot-sand-heat-accumulating solar disc type Stirling engine generating set and method thereof Download PDFInfo
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- CN102155365A CN102155365A CN 201110127569 CN201110127569A CN102155365A CN 102155365 A CN102155365 A CN 102155365A CN 201110127569 CN201110127569 CN 201110127569 CN 201110127569 A CN201110127569 A CN 201110127569A CN 102155365 A CN102155365 A CN 102155365A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims description 53
- 238000009833 condensation Methods 0.000 claims description 14
- 230000005494 condensation Effects 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 10
- 230000006641 stabilisation Effects 0.000 claims description 9
- 238000011105 stabilization Methods 0.000 claims description 9
- 230000007812 deficiency Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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 invention discloses a hot-sand-heat-accumulating solar disc-type Stirling engine generating set and a method thereof. A cold material cabin, a returned material elevator, a heat-preserving spiral conveyer, a flat-plate heat absorbing cavity, a hot material cabin, a Stirling engine and a star-shaped valve are connected in sequence; the flat-plate heat absorbing cavity is provided with a solar light-gathering tracking system; the solar light-gathering tracking system comprises a primary light gathering mirror, a secondary light gathering mirror, a third reflecting mirror, a back bracket, a double-axis tracking system, an upright post, a rotating base plate, a controller and a support rod; the middle of a disc-type reflecting mirror with a paraboloid of revolution is provided with a light hole; a third light-gathering mirror is arranged below the light hole; and the secondary light-gathering mirror is arranged at a position 200-4,000 millimeters away from the peak of the disc-type reflecting mirror with the paraboloid of revolution. By adopting the generating set and the method, the defects of fluctuation of the generated power and even machine halt caused by discontinuity and instability of sunlight are overcome; meanwhile, the inlet temperature of a heat exchanging cavity of the Stirling engine is more stable and the stability of a generating system is enhanced.
Description
Technical field
The present invention relates to the solar energy thermal-power-generating field, relating in particular to a kind of hot sand thermal storage solar can dish formula Stirling-electric hybrid electricity generating device and method thereof.
Background technique
Global solar radiation amount about 1.7 * 10
17W, wherein China accounts for 1%(1.8 * 10
15W is equivalent to 1.9 trillion tons of mark coal/years), be present year 680 times of total energy consumption of China.Electric power is the secondary energy of consumption maximum in the world, and solar energy generation technology is an effective means of effectively alleviating current energy crisis, and application prospect is extremely wide.
Solar energy generation technology mainly is divided into photovoltaic generation and solar energy thermal-power-generating two big classes.Photovoltaic generation mainly is to utilize the photoelectric effect of photovoltaic battery panel to generate electricity, and when unglazed or sunlight intensity fluctuation, complete generation outage of photovoltaic generating system or generated output fluctuation are impacted very big to electrical network.Solar energy thermal-power-generating mainly is by parabolic mirror sunlight to be gathered together, and directly utilizes external heating motor (as Stirling-electric hybrid) generating, or produces the steam driven steam turbine power generation of High Temperature High Pressure by heat-exchanger rig.Solar energy thermal-power-generating efficient is higher, can be stored in evening or the continuation generating of unglazed time by heat, increases the operation stability and the reliability of solar heat power generation system.
Summary of the invention
The present invention is directed to the deficiency of existing solar energy thermal-power-generating method, a kind of hot sand thermal storage solar energy dish formula Stirling-electric hybrid electricity generating device and method thereof are provided.
Hot sand thermal storage solar can comprise Salar light-gathering tracking system, hot aggregate bin, urgent bypass outlet, cold burden storehouse, returning charge lift, star-like valve, generator, Stirling engine, insulation screw conveyor, flat heat-absorbing chamber by dish formula Stirling-electric hybrid electricity generating device; Cold burden storehouse, returning charge lift, insulation screw conveyor, flat heat-absorbing chamber, hot aggregate bin, Stirling engine, star-like valve link to each other in turn, flat heat-absorbing chamber is provided with the Salar light-gathering tracking system, and the Salar light-gathering tracking system comprises condenser, secondary condensation mirror, triplex reflector, back bracket, double-axis tracking system, column, swivel base, controller, strut; Have loophole in the middle of the dish formula reflector of the paraboloid of revolution, the arranged beneath of loophole has condenser three times; The top of loophole, from vertex distance 200~4000mm place of paraboloid of revolution dish formula reflector cloth secondary condensation mirror, be provided with strut between paraboloid of revolution dish formula reflector and the secondary condensation mirror, the back bracket of paraboloid of revolution dish formula reflector is connected by the double-axis tracking system with column one end, the controller of double-axis tracking system places on the ground, and the column the other end links to each other with swivel base.
Hot sand thermal storage solar can dish formula Stirling-electric hybrid electricity-generating method be: by the double-axis tracking system, converge to the condenser below one time by controller control condenser, secondary condensation mirror and triplex reflector and with sunlight, therefore devices such as flat heat-absorbing chamber, hot aggregate bin, Stirling-electric hybrid and generator can be arranged on the ground, have largely improved the stability and the wind resistance of system; Light after converging is radiated on the interior hot sand of flat heat-absorbing chamber, the hot sand temperature in flat heat-absorbing chamber outlet port reaches 800 ℃~1000 ℃, hot sand enters hot aggregate bin, hot sand temperature stabilization in the hot aggregate bin is at 700 ℃~950 ℃, the heat exchanging chamber heat exchange after heat sand temperature stabilization of process Stirling-electric hybrid is at 300 ℃~500 ℃, Stirling-electric hybrid links to each other with generator, drive generator for electricity generation, hot sand flows into the cold burden storehouse through star-like valve, get back to flat heat-absorbing chamber through the returning charge lift with the insulation screw conveyor again and heat again, form circulation with this; At the overcast and rainy or night of sunlight deficiency, the heat exchanging chamber that 700 ℃~950 ℃ the hot sand that stores in the hot aggregate bin enters Stirling-electric hybrid carries out heat exchange, for Stirling-electric hybrid provides thermal source, guarantee the generating that generator can be continual and steady, heat exchange after heat sand temperature stabilization is at 300 ℃~500 ℃, flow into the cold burden storehouse through star-like valve, get back to flat heat-absorbing chamber through returning charge lift and insulation screw conveyor again, form circulation with this; Under special circumstances, the hot sand in the hot aggregate bin can be by urgent bypass outlet discharging, and material flows into the cold burden storehouse, improves the Safety performance of system.
Compared with prior art, the present invention has the following advantages:
1, the concentrating method of the present invention's employing can be realized behind the solar energy dish formula optically focused optically focused focal spot all being transferred to dish formula system below, can effectively reduce the energy consumption of sun tracking system, improves the balance and the wind resistance of system.Whole solar concentrating system is controlled by the double-axis tracking system simultaneously, but the real-time tracking sun guarantees spotlight effect.
2, the hot sand regenerative system that adopts of the present invention can be in sunlight intensity provides thermal source for Stirling-electric hybrid during not enough or rainy weather, make Stirling-electric hybrid continue generating, has overcome that sunlight is discontinuous and unstable to cause generated output to fluctuate even the shortcoming of shutdown.
3, the present invention has adopted hot sand as cycle fluid, and specific heat capacity is big, the blackness height, and the circulating temperature height can change solar radiant energy into heat energy and storage effectively; Simultaneously, the present invention adopts Stirling-electric hybrid as being the device of mechanical energy with thermal power transfer, can improve the efficient of solar energy thermal-power-generating.
4, the present invention has adopted the Emergency Cooling System method, and under special circumstances, the hot sand in the hot aggregate bin can through after the water jacket cooling, flow into the cold burden storehouse by gate valve again by urgent bypass outlet discharging, improves the Safety performance of system.
Description of drawings:
Fig. 1 is the structural representation of hot sand thermal storage solar energy dish formula Stirling-electric hybrid electricity generating device;
Fig. 2 is the structural representation of solar-energy light collector of the present invention:
Among the figure: condenser 1, secondary condensation mirror 2, triplex reflector 3, hot aggregate bin 4, urgent bypass outlet 5, cold burden storehouse 6, returning charge lift 7, star-like valve 8, generator 9, Stirling engine 10, insulation screw conveyor 11, flat heat-absorbing chamber 12, back bracket 13, double-axis tracking system 14, column 15, swivel base 16, controller 17, strut 18.
Embodiment:
As shown in Figure 1, 2, hot sand thermal storage solar can comprise Salar light-gathering tracking system, hot aggregate bin 4, urgent bypass outlet 5, cold burden storehouse 6, returning charge lift 7, star-like valve 8, generator 9, Stirling engine 10, insulation screw conveyor 11, flat heat-absorbing chamber 12 by dish formula Stirling-electric hybrid electricity generating device; Cold burden storehouse 6, returning charge lift 7, insulation screw conveyor 11, flat heat-absorbing chamber 12, hot aggregate bin 4, Stirling engine 10, star-like valve 8 link to each other in turn, flat heat-absorbing chamber 12 is provided with the Salar light-gathering tracking system, and the Salar light-gathering tracking system comprises condenser 1, secondary condensation mirror 2, triplex reflector 3, back bracket 13, double-axis tracking system 14, column 15, swivel base 16, controller 17, strut 18; Have loophole in the middle of the dish formula reflector 1 of the paraboloid of revolution, the arranged beneath of loophole has condenser 3 three times; The top of loophole, from vertex distance 200~4000mm place of paraboloid of revolution dish formula reflector 1 cloth secondary condensation mirror 2, be provided with strut 18 between paraboloid of revolution dish formula reflector 1 and the secondary condensation mirror 2, the back bracket 13 of paraboloid of revolution dish formula reflector 1 is connected by double-axis tracking system 14 with column 15 1 ends, the controller 17 of double-axis tracking system 14 places on the ground, and column 15 the other ends link to each other with swivel base 16.
Hot sand thermal storage solar can dish formula Stirling-electric hybrid electricity-generating method be: by double-axis tracking system 14, converge to condenser 1 below one time by controller 17 controls condenser 1, secondary condensation mirror 2 and triplex reflector 3 and with sunlight, therefore devices such as flat heat-absorbing chamber 12, hot aggregate bin 4, Stirling-electric hybrid 10 and generator 9 can be arranged on the ground, have largely improved the stability and the wind resistance of system; Light after converging is radiated on the hot sand in the flat heat-absorbing chamber 12, the hot sand temperature in flat heat-absorbing chamber 12 outlet ports reaches 800 ℃~1000 ℃, hot sand enters hot aggregate bin 4, hot sand temperature stabilization in the hot aggregate bin 4 is at 700 ℃~950 ℃, the heat exchanging chamber heat exchange after heat sand temperature stabilization of process Stirling-electric hybrid 10 is at 300 ℃~500 ℃, Stirling-electric hybrid 10 links to each other with generator 9, drive generator 9 generatings, hot sand flows into cold burden storehouse 6 through star-like valve 8, get back to flat heat-absorbing chamber 12 through returning charge lift 7 with insulation screw conveyor 11 again and heat again, form circulation with this; At the overcast and rainy or night of sunlight deficiency, the heat exchanging chamber that 700 ℃~950 ℃ the hot sand that stores in the hot aggregate bin 4 enters Stirling-electric hybrid 10 carries out heat exchange, for Stirling-electric hybrid 10 provides thermal source, guarantee the generating that generator 9 can be continual and steady, heat exchange after heat sand temperature stabilization is at 300 ℃~500 ℃, flow into cold burden storehouse 6 through star-like valve 8, get back to flat heat-absorbing chamber 12 through returning charge lift 7 and insulation screw conveyor 11 again, form circulation with this; Under special circumstances, the hot sand in the hot aggregate bin 4 can export 5 dischargings by urgent bypass, and material flows into cold burden storehouse 8, improves the Safety performance of system.
Embodiment:
The hot sand thermal storage solar energy dish formula Stirling-electric hybrid electricity generating device of present embodiment as shown in Figure 1, device is by a condenser, the secondary condensation mirror, triplex reflector, hot aggregate bin, urgent bypass outlet, the cold burden storehouse, the returning charge lift, star-like valve, water jacket, generator, Stirling engine, the insulation screw conveyor, flat heat-absorbing chamber, the double-axis tracking system, controller, back bracket, column, swivel base, strut is formed, wherein the heat-absorbing chamber outlet links to each other with the hot aggregate bin inlet, the hot aggregate bin outlet links to each other with the heat exchanging chamber inlet of Stirling-electric hybrid, the heat exchanging chamber inlet of Stirling-electric hybrid is controlled star-like valve inlet with hot sand flow rate and is linked to each other, the outlet that hot sand flow rate is controlled star-like valve links to each other with the inlet in cold burden storehouse, and the outlet in cold burden storehouse links to each other with the inlet of heat-absorbing chamber with the insulation screw conveyor through the returning charge lift; Stirling engine is connected with generator.Three optical blocks of solar energy are made up of primary event mirror, secondary reflection mirror, triplex reflector, double-axis tracking system and controller.A described secondary mirror, two secondary mirrors and the described surface equation of three secondary mirrors are the composite surfaces that a rotation Hyperbolic Equation or a plurality of rotation Hyperbolic Equation are formed.The Emergency Cooling System device is made up of urgent bypass outlet, water jacket, gate valve and cold burden bucket.Hot sand particle in the hot aggregate bin is put into urgent bypass outlet, and then through the water jacket cooling, the temperature cool to room temperature of hot sand particle flows into the cold burden bucket through gate valve again.
In the present embodiment, total light gathering efficiency of a described secondary mirror, two secondary mirrors and three secondary mirrors is 85%, and photo-thermal conversion efficiency is 80%, the heat radiation heat waste is 20%, and the optically focused ratio is 300, and the Stirling engine generating efficiency is 25%, used hot sand is the SiC particle, and local intensity of solar radiation is 1kW/m
2, the sunshine duration is 8 hours, whole system operation 14 hours, and when solar radiation was arranged, the mass flow rate of the hot sand in the flat heat-absorbing chamber was 0.0174kg/s.
When the generated output of Stirling-electric hybrid was 1kW, the area of a required secondary mirror was 7.35 ㎡.The out temperature of hot sand turnover Stirling-electric hybrid heat exchanging chamber is respectively 800 ℃ and 500 ℃, and at this moment, the mass flow rate of the hot sand particle at place, hot junction is 0.00995kg/s.If guarantee uninterruptable power generation in 14 hours in a day, then hot aggregate bin need store the hot sand of 214.56kg, and at this moment, the volume of hot aggregate bin is 0.141m
3
When the generated output of Stirling-electric hybrid was 10kW, the area of a required secondary mirror was 73.5 ㎡.The out temperature of hot sand turnover Stirling-electric hybrid heat exchanging chamber is respectively 800 ℃ and 500 ℃, and at this moment, the mass flow rate of the hot sand particle at place, hot junction is 0.0995kg/s.If guarantee uninterruptable power generation in 14 hours in a day, then hot aggregate bin need store the hot sand of 2145.6kg, and at this moment, the volume of hot aggregate bin is 1.41m
3
Claims (2)
1. a hot sand thermal storage solar energy dish formula Stirling-electric hybrid electricity generating device is characterized in that comprising that Salar light-gathering tracking system, hot aggregate bin (4), urgent bypass export (5), cold burden storehouse (6), returning charge lift (7), star-like valve (8), generator (9), Stirling engine (10), insulation screw conveyor (11), flat heat-absorbing chamber (12); Cold burden storehouse (6), returning charge lift (7), insulation screw conveyor (11), flat heat-absorbing chamber (12), hot aggregate bin (4), Stirling engine (10), star-like valve (8) link to each other in turn, flat heat-absorbing chamber (12) is provided with the Salar light-gathering tracking system, and the Salar light-gathering tracking system comprises a condenser (1), secondary condensation mirror (2), triplex reflector (3), back bracket (13), double-axis tracking system (14), column (15), swivel base (16), controller (17), strut (18); Have loophole in the middle of the dish formula reflector (1) of the paraboloid of revolution, the arranged beneath of loophole has three condensers (3); The top of loophole, at vertex distance 200~4000mm place cloth secondary condensation mirror (2) from paraboloid of revolution dish formula reflector (1), be provided with strut (18) between paraboloid of revolution dish formula reflector (1) and the secondary condensation mirror (2), the back bracket (13) of paraboloid of revolution dish formula reflector (1) is connected by double-axis tracking system (14) with column (15) one ends, the controller (17) of double-axis tracking system (14) places on the ground, and column (15) the other end links to each other with swivel base (16).
2. the hot sand thermal storage solar that installs according to claim 1 of a use can dish formula Stirling-electric hybrid electricity-generating method, it is characterized in that: by double-axis tracking system (14), converge to a condenser (1) below by controller (a 17) control condenser (1), secondary condensation mirror (2) and triplex reflector (3) and with sunlight, therefore flat heat-absorbing chamber (12), hot aggregate bin (4), Stirling-electric hybrid (10) and generator devices such as (9) can be arranged on the ground, have largely improved the stability and the wind resistance of system; Light after converging is radiated on the interior hot sand of flat heat-absorbing chamber (12), the hot sand temperature in flat heat-absorbing chamber (12) outlet port reaches 800 ℃~1000 ℃, hot sand enters hot aggregate bin (4), hot sand temperature stabilization in the hot aggregate bin (4) is at 700 ℃~950 ℃, the heat exchanging chamber heat exchange after heat sand temperature stabilization of process Stirling-electric hybrid (10) is at 300 ℃~500 ℃, Stirling-electric hybrid (10) links to each other with generator (9), drive generator (9) generating, hot sand flows into cold burden storehouse (6) through star-like valve (8), pass through returning charge lift (7) again and insulation screw conveyor (11) is got back to flat heat-absorbing chamber (12) and heated, form circulation with this; At the overcast and rainy or night of sunlight deficiency, the heat exchanging chamber that 700 ℃~950 ℃ the hot sand that stores in the hot aggregate bin (4) enters Stirling-electric hybrid (10) carries out heat exchange, for Stirling-electric hybrid (10) provides thermal source, guarantee the generating that generator (9) can be continual and steady, heat exchange after heat sand temperature stabilization is at 300 ℃~500 ℃, flow into cold burden storehouse (6) through star-like valve (8), pass through returning charge lift (7) again and be incubated screw conveyor (11) and get back to flat heat-absorbing chamber (12), form circulation with this; Under special circumstances, the hot sand in the hot aggregate bin (4) can be by urgent bypass outlet (5) discharging, and material flows into cold burden storehouse (8), improves the Safety performance of system.
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CN201110127569A CN102155365B (en) | 2011-05-17 | 2011-05-17 | Hot-sand-heat-accumulating solar disc type Stirling engine generating set and method thereof |
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CN201110127569A CN102155365B (en) | 2011-05-17 | 2011-05-17 | Hot-sand-heat-accumulating solar disc type Stirling engine generating set and method thereof |
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CN102155365B CN102155365B (en) | 2012-08-29 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN105179187A (en) * | 2015-09-25 | 2015-12-23 | 浙江大学 | Energy storage method and device for solar disc type Stirling system |
CN105508159A (en) * | 2016-01-05 | 2016-04-20 | 王旭 | Preparation method of heat-storage-tank-bearing solar hyperboloid mirror system |
CN107062636A (en) * | 2017-04-25 | 2017-08-18 | 东南大学 | Suitable for the combined light gathering device of solar thermal utilization |
CN108444117A (en) * | 2018-05-17 | 2018-08-24 | 山东建筑大学 | A kind of device and method of solar energy hot-cast socket and the composite heat supply of accumulation of energy |
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CN102032689A (en) * | 2011-01-24 | 2011-04-27 | 上海新产业光电技术有限公司 | Novel disc-type solar-powered heat collecting device and system |
CN201827033U (en) * | 2010-09-21 | 2011-05-11 | 广东工业大学 | Disc type solar Stirling heat and power cogeneration device |
CN202082057U (en) * | 2011-05-17 | 2011-12-21 | 浙江大学 | Hot-sand heat-storage solar disc Strling generator |
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2011
- 2011-05-17 CN CN201110127569A patent/CN102155365B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN201827033U (en) * | 2010-09-21 | 2011-05-11 | 广东工业大学 | Disc type solar Stirling heat and power cogeneration device |
CN102032689A (en) * | 2011-01-24 | 2011-04-27 | 上海新产业光电技术有限公司 | Novel disc-type solar-powered heat collecting device and system |
CN202082057U (en) * | 2011-05-17 | 2011-12-21 | 浙江大学 | Hot-sand heat-storage solar disc Strling generator |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN105179187A (en) * | 2015-09-25 | 2015-12-23 | 浙江大学 | Energy storage method and device for solar disc type Stirling system |
CN105179187B (en) * | 2015-09-25 | 2018-05-08 | 浙江大学 | The energy storage method and its device of solar energy dish-style Stirling system |
CN105508159A (en) * | 2016-01-05 | 2016-04-20 | 王旭 | Preparation method of heat-storage-tank-bearing solar hyperboloid mirror system |
CN105508159B (en) * | 2016-01-05 | 2018-10-30 | 王旭 | A kind of preparation method of the solar energy hyperbolic mirror system with heat storage box |
CN107062636A (en) * | 2017-04-25 | 2017-08-18 | 东南大学 | Suitable for the combined light gathering device of solar thermal utilization |
CN108444117A (en) * | 2018-05-17 | 2018-08-24 | 山东建筑大学 | A kind of device and method of solar energy hot-cast socket and the composite heat supply of accumulation of energy |
CN108444117B (en) * | 2018-05-17 | 2023-10-13 | 山东建筑大学 | Solar photo-thermal conversion and energy storage composite heating device and method |
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