CN103426962A - Novel distributed cogeneration system utilizing solar energy and chemical energy of fuel - Google Patents
Novel distributed cogeneration system utilizing solar energy and chemical energy of fuel Download PDFInfo
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- CN103426962A CN103426962A CN2013102993921A CN201310299392A CN103426962A CN 103426962 A CN103426962 A CN 103426962A CN 2013102993921 A CN2013102993921 A CN 2013102993921A CN 201310299392 A CN201310299392 A CN 201310299392A CN 103426962 A CN103426962 A CN 103426962A
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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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
- Y02E10/50—Photovoltaic [PV] energy
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention belongs to the field of photovoltaic technologies, and particularly relates to a novel distributed cogeneration system utilizing solar energy and chemical energy of fuel. The novel distributed cogeneration system comprises a solar photovoltaic cell, a heat source, a heat radiator, a heat photovoltaic cell, a flue gas heat exchanger and cooling equipment, and is characterized by comprising the solar photovoltaic cell and the heat photovoltaic cell; the flue gas heat exchanger comprises a flue gas pipeline and a water channel; the cooling equipment comprises a water pump and a cooling water pipe, the cooling water pipe sequentially runs through the heat photovoltaic cell and the solar photovoltaic cell and extends to the water channel of the flue gas heat exchanger, and cooling water is eventually heated to obtain high-temperature hot water. The novel distributed cogeneration system has the advantages that owing to a supplementation effect of a heat photovoltaic power generation system, the stability of electric energy outputted by the novel distributed cogeneration system is greatly improved as compared with a solar photovoltaic system; heat energy is recycled owing to the cogeneration system, and can be outputted while the electric energy is outputted, and accordingly the overall efficiency of the novel distributed cogeneration system is greatly improved as compared with an individual heat photovoltaic system and the individual solar photovoltaic system.
Description
Technical field
The invention belongs to the photovoltaic technology field, be specifically related to photovoltaic and thermo-optical volt total system device, be based on the whole efficiency that improves original photovoltaic and thermo-optical volt system and stability practicality and the design carried out, to reach the purpose of energy-saving and emission-reduction.
Background technology
Solar energy is a kind of environmental protection regenerative resource, and is seen everywhere, but local use.Solar utilization technique obtains development in recent years, wherein solar photovoltaic generation system utilizes the effective way of solar energy just, it has following advantage: noiseless, pollution-free, energy is available anywhere, and is not subject to regional limits, without consume fuel, easily store, can also combine with building easily etc., these advantages are all that conventional power generation usage and other generation mode can not be compared.The generating of thermo-optical volt is the heat that the various combustions heat such as fuel, used heat, solar energy, radioisotopic heat source etc. are produced, and changes the radiant energy of infrared band into by the thermal radiation reflector, and this radiant energy projects on thermo-optical volt battery and changes electric energy into.Thermo-optical volt generating can obtain higher conversion efficiency in theory, and has adaptability, movement-less part to pluralities of fuel, is easy to the advantages such as maintenance, high power density, noiseless operation and low radiation.But current solar photovoltaic generation system and thermo-optical photovoltaic generating system, all only export electric energy, and, when isolated operation separately, solar energy power generating is subject to the impact of weather and illumination condition, and also there is the shortcoming that efficiency is not high in the generating of thermo-optical volt.
Summary of the invention
The present invention seeks to the deficiency of to use separately solar energy photovoltaic system or thermo-optical to lie prostrate system and producing in order to solve in prior art, and by solar energy photovoltaic system or thermo-optical volt system organic combination, to improve whole efficiency and the stability practicality of photovoltaic and thermo-optical volt system.
The present invention has done following improvement on the basis of traditional solar energy photovoltaic system and thermo-optical volt system:
(1) owing to constantly accepting radiant energy, photovoltaic battery temperature can constantly raise, and its efficiency can descend.Show according to the study, when source temperature is 1227 ℃, battery temperature is that in 25 ℃ of situations, battery conversion efficiency is 25%, and, when battery temperature is 130 ℃, the conversion efficiency of battery is reduced to 17%.Therefore, can increase water cooling system at the back of photovoltaic cell, work to maintain under constant low temperature, the photoelectric conversion efficiency of avoiding the Yin Wendu rising to bring descends.
(2) in the situation that, without any the recuperation of heat measure, a large amount of energy have just slatterned.If high-temperature combustion product directly discharges, not only waste energy, also environment is worked the mischief.Therefore the smoke evacuation outlet in thermo-optical volt system adds a heat transmission equipment, and with the cooling exhaust temperature, output, through the hot water of stepped heating, reaches the purpose of cogeneration of heat and power, improves the efficiency of whole system.
(3) solar energy photovoltaic system is subject to the impact of Changes in weather and illumination condition, and the stability of system output electric energy is difficult to guarantee.Therefore, adding of thermo-optical volt system, be the well-tuned to solar energy photovoltaic system output electric energy, to maintain the stability of output electric energy.
The present invention is achieved by the following technical programs:
A kind of new distribution type co-generation unit, comprise thermal source, heat radiator, thermo-optical volt battery, flue gas heat-exchange unit and cooling device, and described flue gas heat-exchange unit comprises flue and aquaporin, and flue is connected with the fume emission outlet of heat radiator; This system also comprises solar-energy photo-voltaic cell, and described solar-energy photo-voltaic cell and thermo-optical volt battery are in series;
Described cooling device is comprised of water pump and cooling water pipe, and cooling water pipe extends to the aquaporin of flue gas heat-exchange unit; The cooling water pipe of described cooling system is successively through thermo-optical volt battery and solar-energy photo-voltaic cell, and cooling water becomes low-temperature water heating after heat exchange, then passes through flue gas heat-exchange unit and the heat exchange of heat radiator high-temperature flue gas, further is heated into high-temperature-hot-water.
Further, described solar-energy photo-voltaic cell adopts monocrystalline silicon battery, and thermo-optical volt battery adopts the GaSb battery, is circular layout in the periphery of thermo-optical volt system, receives the radiant energy sent from radiator.
Further, described heat radiator adopts cylindricality, and the outside wall surface material adopts SiC, with the GaSb photovoltaic cell, mates; Combustion chamber in heat radiator adopts porous media to fill.
Further, arrange the photon filter between heat radiator and photovoltaic cell, the photon reflection that is greater than the forbidden band wavelength is returned to radiator.
Further, described flue gas heat-exchange unit adopts double pipe heat exchanger, and flue gas and hot water separate, and countercurrent flow comprises low-temperature water heating entrance, high-temperature-hot-water outlet, high-temperature flue gas entry, smoke evacuation outlet, the logical exhaust gases passes that reaches of cooling water; Described low-temperature water heating entrance is connected with the cooling water pipe of the solar-energy photo-voltaic cell of flowing through, and high-temperature flue gas entry is connected with the outlet of heat radiator high-temperature flue gas, and described exhaust gases passes is snakelike.
Beneficial effect of the present invention is:
1) use the water cooling photovoltaic cell, effectively reduce solar-energy photo-voltaic cell and thermo-optical volt battery because self temperature that receiver radiation can cause raises, can not only improve the electrical efficiency of photovoltaic cell, can also improve the service life of equipment.
2) owing to being co-generation unit, reclaimed heat energy, in the output electric energy, also can export heat energy, than independent thermo-optical volt system and solar energy photovoltaic system, the gross efficiency of system gets a promotion.
3) owing to being to combine solar energy photovoltaic system and thermo-optical volt system, can utilize to greatest extent solar energy, not only can realize the purpose of energy savings, stability that again can raising system output electric energy, the round-the-clock heat supply of stably powering under various weather conditions.
4) adjusting of system loading is more convenient, can regulate the quantity delivered of flow and the fuel of cooling water, can realize the adjusting to output electric energy and heat energy, to adapt to the variation of load.
The accompanying drawing explanation
Fig. 1 is new distribution type co-generation unit schematic diagram.Wherein, 1. water pump; 2. solar-energy photo-voltaic cell; 3. thermo-optical lies prostrate battery; 4. flue gas heat-exchange unit; 5. heat radiator; 6. thermal source.
Fig. 2 is the energyflow diagram of system.
Fig. 3 is double pipe heat exchanger structure chart and A-A sectional view.
Fig. 4 is double pipe heat exchanger A-A sectional view.
In figure: 7. low-temperature water heating entrance; 8. high-temperature-hot-water outlet; 9. high-temperature flue gas entry; 10. smoke evacuation outlet; 11. cooling-water duct; 12. exhaust gases passes.
Embodiment
Be new distribution type co-generation unit schematic diagram as shown in Figure 1, improved on the basis of traditional solar energy photovoltaic system and thermo-optical volt system, at the back side of photovoltaic battery panel, increase hot cooling system.Drive cooling water system by water pump 1, through the heat exchange of solar-energy photo-voltaic cell 2, thermo-optical volt battery 3, become low-temperature water heating successively; The high-temperature flue gas heat exchange of discharging through flue gas heat-exchange unit 4 and heat radiator 5 again, export after further being heated into high-temperature-hot-water.When solar irradiation is sufficient, the output electric energy is produced by solar energy photovoltaic system fully; When solar irradiation is not enough, the output electric energy need to be supplemented by thermo-optical volt system, and fuel is heat hot radiator 5 after burning, becomes the thermal source 6 of thermo-optical volt battery, the output electric energy.
The energyflow diagram of system as shown in Figure 2.Under the condition of illumination abundance, the electric energy of solar-energy photo-voltaic cell output just can meet the general electric energy consumption of using, and coolant water temperature is from T
0Be heated to T
1, the hot water temperature of output heat energy is exactly T
1Under the condition of illumination deficiency, the electric energy deficiency of solar-energy photo-voltaic cell output, need aftercombustion to add heat radiator, by thermo-optical volt battery, sends electric energy, guarantees stable output electric energy, and coolant water temperature is just from T
0Be heated to final T
3Do not having under the condition of illumination, sending electric energy by thermo-optical volt battery fully, coolant water temperature is just from T
2(T
2=T
0) be heated to final T
3.By on the photocell surface, arranging thermocouple, record the photocell surface temperature to regulate the flow of cooling water, photronic surface temperature is maintained under constant low temperature, photoelectric conversion efficiency maintains higher level; By the feedback of output electric energy, regulate the quantity delivered of thermo-optical volt system fuel, with stable output electric energy; By the feedback of three grades of high-temperature-hot-water temperature, regulate the flow of cooling water, meet the heat energy of demand with output.
As Fig. 3 is the double pipe heat exchanger schematic diagram, its A-A cross section is as Fig. 4.Low-temperature water heating after the heat exchange of thermo-optical volt battery through flue gas heat-exchange unit again with the high-temperature flue gas heat exchange, further be heated into three grades of high-temperature-hot-waters.The secondary low-temperature water heating enters low-temperature water heating entrance 7, and high-temperature flue gas enters from entrance 9, and exhaust gases passes 12 is in the periphery of cooling-water duct 11, and water and flue gas adverse current heat exchange, to strengthen heat transfer effect.Through after heat exchange again, obtain three grades of high-temperature-hot-waters from exporting 8, flue gas is from exporting 10 discharges.
Further, solar-energy photo-voltaic cell adopts monocrystalline silicon battery, but the higher large tracts of land of its conversion efficiency of thermoelectric adopts; Thermo-optical volt battery adopts the GaSb battery, is circular layout in the periphery of thermo-optical volt system, receives the radiant energy sent from radiator; Radiator adopts cylindricality, and the outside wall surface material adopts SiC, in order to mate with the GaSb photovoltaic cell; Combustion chamber in radiator adopts porous media to fill, and the radiator hull-skin temperature obtained is more even, and the radiation effect of generation is better.Arrange the photon filter between radiator and photovoltaic cell, the photon reflection that is greater than the forbidden band wavelength is returned to radiator; The fuel feed of thermo-optical volt system is by the surface temperature control of output electric energy and radiator; Thermocouple is all arranged on surface at solar-energy photo-voltaic cell and thermo-optical volt battery, to control its temperature; Water pump adopts small-sized booster pump, to overcome the flow resistance of cooling water in pipeline; Cooling water pipe is all arranged at the back side at photovoltaic and thermo-optical volt cell panel, by water pump, is driven, and flow is determined by the temperature on photocell surface and the temperature of output hot water; Flue gas heat-exchange unit adopts double pipe heat exchanger, and flue gas and hot water separate, and countercurrent flow is to strengthen heat transfer effect.
Under the condition of illumination abundance, by solar-energy photo-voltaic cell output electric energy, utilize to greatest extent solar energy; Under the condition of illumination deficiency, the electric energy deficiency of solar-energy photo-voltaic cell output, need aftercombustion to add heat radiator, by thermo-optical volt battery output electric energy, guarantees stable output electric energy; Do not having under the condition of illumination, fully by thermo-optical volt battery output electric energy.Under three kinds of operating modes, in the output electric energy, also can export heat energy.Overcome the defect that independent solar energy photovoltaic system is subject to the illumination condition restriction, simultaneously more energy-conservation than independent thermo-optical volt system again.For common family, not only can be used for power peak regulation, build stand-by station or cogeneration power station, can realize the outlying district Independent Power Generation again.Such distributed generation system can be brought into play pollution-free, convenient, the energy-conservation advantage of solar energy power generating, can bring into play again thermo-optical volt fuel used to generate electricity wide adaptability, stable advantage.
Claims (5)
1. a new distribution type co-generation unit that utilizes solar energy and fuel chemical energy, comprise thermal source, heat radiator, thermo-optical volt battery, flue gas heat-exchange unit and cooling device, described flue gas heat-exchange unit comprises flue and aquaporin, and flue is connected with the fume emission outlet of heat radiator; It is characterized in that: described system also comprises solar-energy photo-voltaic cell, and described solar-energy photo-voltaic cell and thermo-optical volt battery are in series;
Described cooling device is comprised of water pump and cooling water pipe, and cooling water pipe extends to the aquaporin of flue gas heat-exchange unit; The cooling water pipe of described cooling system is successively through thermo-optical volt battery and solar-energy photo-voltaic cell, and cooling water becomes low-temperature water heating after heat exchange, then passes through flue gas heat-exchange unit and the heat exchange of heat radiator high-temperature flue gas, further is heated into high-temperature-hot-water.
2. system according to claim 1, is characterized in that: described solar-energy photo-voltaic cell employing monocrystalline silicon battery; Thermo-optical volt battery adopts the GaSb battery, is circular layout in the periphery of thermo-optical volt system, receives the radiant energy sent from radiator.
3. system according to claim 1 is characterized in that: described heat radiator adopts cylindricality, and the outside wall surface material adopts SiC, with the GaSb photovoltaic cell, mates; Combustion chamber in heat radiator adopts porous media to fill.
4. system according to claim 1, is characterized in that: arrange between heat radiator and photovoltaic cell and the photon filter photon reflection that is greater than the forbidden band wavelength is returned to radiator.
5. system according to claim 1, it is characterized in that: described flue gas heat-exchange unit adopts double pipe heat exchanger, flue gas and hot water separate, and countercurrent flow comprises low-temperature water heating entrance, high-temperature-hot-water outlet, high-temperature flue gas entry, smoke evacuation outlet, the logical exhaust gases passes that reaches of cooling water; Described low-temperature water heating entrance is connected with the cooling water pipe of the solar-energy photo-voltaic cell of flowing through, and high-temperature flue gas entry is connected with the outlet of heat radiator high-temperature flue gas, and described exhaust gases passes is snakelike.
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Cited By (5)
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| CN106849838A (en) * | 2017-04-12 | 2017-06-13 | 南通华謇能源科技有限公司 | A kind of thermal photovoltaic TRT with regenerator |
| CN109245721A (en) * | 2018-11-14 | 2019-01-18 | 河海大学 | A kind of thermophotovoltaic performance test apparatus |
| CN110463031A (en) * | 2017-04-02 | 2019-11-15 | 技术研发基金有限公司 | Non-thermal thermoluminescence for power generation |
| CN111895553A (en) * | 2020-07-30 | 2020-11-06 | 东南大学 | Method for adjusting environmental temperature by utilizing photoelectric conversion effect |
| CN112880214A (en) * | 2021-01-05 | 2021-06-01 | 常州大学 | Fireless field food heating system based on solar catalytic oxidation |
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Application publication date: 20131204 |