CN203394601U - PV/T (photovoltaic/thermal) collector and gas-steam combined cycle unit united energy supply system - Google Patents
PV/T (photovoltaic/thermal) collector and gas-steam combined cycle unit united energy supply system Download PDFInfo
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- CN203394601U CN203394601U CN201320469595.6U CN201320469595U CN203394601U CN 203394601 U CN203394601 U CN 203394601U CN 201320469595 U CN201320469595 U CN 201320469595U CN 203394601 U CN203394601 U CN 203394601U
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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
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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
- Y02E10/52—PV systems with concentrators
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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Abstract
A PV/T collector and gas-steam combined cycle unit united energy supply system comprises a gas-steam combined cycle unit, a PVT heat collecting system and a primer pump. Part of condensation water drained by the condensate pump of the gas-steam combined cycle unit enters the PVT heat collecting system through the primer pump for being heated, the condensation water heated by the PVT heat collecting system and the rest condensation water drained by the condensate pump of the gas-steam combined cycle unit enter water working medium inlet of the low pressure economizer of the exhaust-heat boiler of the gas-steam combined cycle unit after converging, and the electric power output end of the PVT heat collecting system is connected with a load or a power grid. The PV/T collector and gas-steam combined cycle unit united energy supply system combines the PVT heat collecting system and the gas-steam combined cycle unit organically, well solves the problems of heat dissipation and waste heat utilization of photovoltaic cells, greatly improves the comprehensive utilization rate of energies, reduces the consumption of natural gas and is beneficial to energy saving and emission reduction of gas-steam combined power plants.
Description
Technical field
The utility model relates to a kind of heat and power supply system that PVT photovoltaic and photothermal heat-collecting devcie and Gas-steam Combined Cycle unit are combined, and belongs to technical field of solar.
Background technique
Photovoltaic power generation technology be take photovoltaic cell as basis, and the photovoltaic effect of utilizing semiconductor P-N knot to be subject to illumination generation directly becomes electric energy by transform light energy.In photovoltaic cell capable of generating power process, the ratio that incident solar energy is converted to electric energy is about 15%, all the other most of energy are all converted to heat, the temperature of photovoltaic cell is raise, and the significantly rising of photovoltaic battery temperature will cause its photoelectric transformation efficiency to decline, research shows, 1 ℃ of the every rising of photovoltaic battery temperature, photoelectric transformation efficiency declines 0.5%, and therefore, solar photovoltaic generation system exists the problems such as optoelectronic transformation efficiency is low, the discontinuous and cost of electricity-generating of generating electricity is high.
Gas-steam Combined Cycle unit is the rock gas after heating to be entered to the firing chamber of gas turbine, the high-pressure air mixed combustion being pressed into gas compressor, utilize the high-temperature high-pressure air flow propelling gas turbine engine rotation acting producing, the gas temperature of discharging from gas turbine is up to 600 degree Celsius, still there is very high energy, these high-temperature gases are delivered to boiler, water is heated into steam and removes to promote steam turbine, drive generator generating.The generating efficiency of Gas-steam Combined Cycle unit is higher than coal-fired unit, and without desulfurization removing nitric, CO2 emissions is little, little to air pollution degree.But rock gas is faced with the problem of scarcity of resources, by natural gas power, be difficult to meet power reguirements.
In a word, above energy supplying system is desirable not enough at aspects such as energy utilization rate, cost of electricity-generating, energy-saving and emission-reduction, is necessary further to study the comprehensive utilization technique of new energy.
Model utility content
The purpose of this utility model is the drawback for prior art, provides a kind of photovoltaic and photothermal heat collector to combine energy supplying system with Gas-steam Combined Cycle unit, to improve the comprehensive utilization ratio of the energy, reduces cost of electricity-generating, reaches the object of energy-saving and emission-reduction.
Problem described in the utility model realizes with following technical proposals:
A kind of photovoltaic and photothermal heat collector is combined energy supplying system with Gas-steam Combined Cycle unit, formation comprises Gas-steam Combined Cycle unit, PVT collecting system and priming pump, the part water of condensation that the condensate pump of Gas-steam Combined Cycle unit is discharged enters the heating of PVT collecting system through priming pump, the device of working medium entrance of low-pressure coal saver that enters the exhaust heat boiler of Gas-steam Combined Cycle unit after the water of condensation of PVT collecting system heating is converged with all the other water of condensation of condensate pump discharge, the electric energy output end of PVT collecting system is connected with load or electrical network.
Above-mentioned photovoltaic and photothermal heat collector is combined energy supplying system with Gas-steam Combined Cycle unit, described PVT collecting system is formed by connecting by the series parallel connection of a plurality of photovoltaic and photothermal heat collector, described photovoltaic and photothermal heat collector comprises PVT framework, CPC condenser, photovoltaic cell component, heat conduction board and two armorplate glasses, described CPC condenser is arranged on PVT framework, described photovoltaic cell component is positioned at the bottom of CPC condenser, its shady face is bonded on heat conduction board by adhesive layer, in described heat conduction board, be provided with lower fluid conduit, one end of described lower fluid conduit taps into water, another termination insulation water storage box, two armorplate glasses are positioned at the side to light top of photovoltaic cell component, the drain opening of the upper fluid passage one termination condensate pump that the sidewall of they and CPC condenser surrounds, the device of working medium entrance of the low-pressure coal saver of a termination exhaust heat boiler.
Above-mentioned photovoltaic and photothermal heat collector is combined energy supplying system with Gas-steam Combined Cycle unit, and the shady face of described heat conduction board is provided with heat insulation layer, and the top of two armorplate glasses is provided with perspex cover plate.
Above-mentioned photovoltaic and photothermal heat collector is combined energy supplying system with Gas-steam Combined Cycle unit, is provided with transparent thermal insulation layer on the inwall of described upper fluid passage.
Above-mentioned photovoltaic and photothermal heat collector is combined energy supplying system with Gas-steam Combined Cycle unit, and the water (flow) direction in described lower fluid conduit He Shang fluid passage is contrary.
The utility model utilizes the low-temperature condensate of gas-steam combined power plant and domestic water to carry out cooling to the photovoltaic cell component in photovoltaic and photothermal heat collector, when reducing battery component operating temperature, obtained the water of condensation of domestic hot-water and higher temperature, so just improved the efficiency of boiler of photoelectric conversion rate and the exhaust heat boiler of photovoltaic cell component, reduce cost of electricity-generating, also facilitated people's life simultaneously.
The utility model organically combines PVT collecting system and Gas-steam Combined Cycle unit, the heat radiation and the used heat that have solved well photovoltaic cell utilize problem, it adopts pump circulation fluid (water or air) to remove the heat that battery component produces, these heats that are not converted to electric energy are absorbed by low temperature water or cool air, solved well the low problem of optoelectronic transformation efficiency of photovoltaic cell, greatly improved the comprehensive utilization ratio of the energy, reduce the consumption of rock gas, be conducive to the energy-saving and emission-reduction of gas-steam combined power plant.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the sectional view of photovoltaic and photothermal heat collector;
Fig. 2 is the structural representation that photovoltaic and photothermal heat collector and Gas-steam Combined Cycle unit are combined energy supplying system.
In figure, each list of reference numerals is: 1, chimney, 2, high pressure water pump, 3, middle pressure feed water pump, 4, low-pressure drum, 5, middle pressure drum, 6, high pressure drum, 7, low-pressure coal saver, 8, high intermediate pressure cylinder, 9, turbine low pressure cylinder, 10, vapour condenser, 11, circulating water pump, 12, condensate pump, 13, exhaust heat boiler, 14, priming pump, 15, generator, 17, gas turbine, 18, reheater, 19, photovoltaic and photothermal heat collector, 20, armorplate glass; 21, heat insulation layer; 22, PVT framework; 23, CPC condenser; 24, glass cover-plate; 25, interlayer air; 26, photovoltaic cell component; 27, adhesive layer; 28, lower fluid conduit; 29, heat conduction board; 30,Shang fluid passage; 31, transparent thermal insulation layer.
Embodiment
The utility model proposes a kind of modified model PVT photovoltaic and photothermal heat collector and combine energy supplying system with Gas-steam Combined Cycle unit, this system has solved photovoltaic cell heat radiation, used heat utilizes problem, photovoltaic generation is carried out grid-connected, take full advantage of solar energy, supplemented gas-steam combined power generating capacity, and the low-pressure coal saver inlet water working medium of gas-steam combined residual heat of electric power plant boiler is heated, improved efficiency of boiler and generating efficiency, reduced cost of electricity-generating.
Fig. 1 is the sectional drawing of photovoltaic and photothermal heat collector, and its main structure comprises: glass cover-plate 24, interlayer air 25, photovoltaic cell component 26, adhesive layer 27, lower fluid conduit 28, heat conduction board 29, heat insulation layer 21, PVT framework 22, CPC condenser 23, armorplate glass 20,Shang fluid passage 30.Its working principle: sunlight is 5cm through glass cover-plate 24 and two armorplate glass 20 spacing of armorplate glass 20(after CPC condenser 23 is assembled, unsuitable excessive or too small), part infrared light is absorbed by the power plant condensation water in armorplate glass 20 and upper fluid passage 30, overwhelming majority radiation of visible light is (the main infrared light that absorbs of water of condensation and armorplate glass 20 in upper fluid passage 30 to photovoltaic cell component 26, the heat that armorplate glass 20 absorbs can pass to water of condensation, due to water of condensation and 20 pairs of visible-light absorptivity of armorplate glass very low, therefore the visible ray of the overwhelming majority can arrive photovoltaic cell component 26 surfaces by armorplate glass 20 and water of condensation, produce photovoltaic effect), according to photovoltaic effect principle, photovoltaic cell is converted into electric energy by 15% solar energy, all the other most of energy are all converted to heat, this part heat sub-fraction is lost among interlayer air 25 by convection current and radiation heat transfer, most passes to adhesive layer 27, adhesive layer (Heat Conduction Material) passes to again heat conduction board 29, water inlet (is embedded among heat conduction board 29 through lower fluid conduit 28, it is highly 2cm, width is 4cm, interval 2cm between each lower fluid conduit 28, totally 8 lower fluid conduits, lower fluid conduit 28 length 200cm, heat conduction board 29 width 48cm, thickness 4cm, lower fluid conduit 28 is arranged in heat conduction board middle) absorb the heat of battery plate backlight side heat conduction board, entering water temp is improved, photovoltaic and photothermal heat collector (PVT) all arranges fluid passage meeting light side and backlight side, photovoltaic battery temperature is significantly reduced, not only photoelectric transformation efficiency increases, and the heat major part that photovoltaic cell produces is utilized effectively.Heat insulation layer 21 is thermal-protective material with PVT framework 22, prevents that heat from transmitting to the external world and causing damage.
It between the outer surface of the shady face of photovoltaic cell component 26 and heat conduction board 29, is adhesive layer 27, adhesive layer scribbles opaque TPT material and thermal conductive insulation glue, to fill contact gap, improve heat-conducting effect, and make photovoltaic cell component make full use of sunlight to generate electricity, diminished reflex.
In order to guarantee the working efficiency of every photovoltaic cell component 26, avoid heat between heat conduction board 29 and environment and between photovoltaic cell component 26 and environment, producing unnecessary thermal loss and heat conduction, in heat conduction board 29 bottoms, install layer of insulation material additional, at photovoltaic cell component side to light, install one deck glass cover-plate 24 additional, and install heat insulation PVT framework 22 additional in both sides and the bottom of assembly.
The working principle of native system
Referring to Fig. 2, from approximately 30 ℃ of vapour condenser 10 device of working medium temperature out, by priming pump 14, draw upper fluid passage 30 entrances that one current enter PVT photovoltaic and photothermal heat collector, the device of working medium ingress that device of working medium after the heating of upper strata is introduced to the low-pressure coal saver 7 of exhaust heat boiler 13, after low-pressure coal saver 7 heating, enter low pressure evaporator and then enter low-pressure drum 4, a part become low pressure steam enter low-pressure superheater carry out overheated, directly enter turbine low pressure cylinder 9 actings, in low-pressure drum 4, remaining part water is drawn out to mesohigh economizer by mesohigh feed water pump 2 and heats, enter again after the heating of mesohigh vaporizer, enter mesohigh drum, the steam producing enters mesohigh superheater again and heats, middle pressure superheater is undertaken entering pressure acting in steam turbine after heat by reheater again, high pressure superheated steam directly enters high-pressure cylinder acting, drive generator 15 generatings, the reheater 18 that the steam that high-pressure cylinder is finished merit enters exhaust heat boiler 13 carries out heat again, the steam that intermediate pressure cylinder is finished merit enters low pressure (LP) cylinder, the steam that low pressure (LP) cylinder is finished merit is discharged to the recirculated cooling water that vapour condenser 10 and circulating water pump extract out and carries out heat exchange, after condensing, low pressure (LP) cylinder steam discharge becomes again water of condensation, part water of condensation is introduced PVT photovoltaic and photothermal heat collector 19 through priming pump 14 again, be equivalent to heat in advance main feedwater, accelerate steam/water circulating process, improved the efficiency of boiler of exhaust heat boiler 13, and the intensity of solar radiation Dui Shang fluid passage 30 of measuring by solar radiation table enters device of working medium flow and carries out coarse adjustment, guarantee that outlet device of working medium temperature stabilization is in suitable scope, when having improved efficiency of boiler, also be unlikely to reduce because temperature rise reason causes photovoltaic efficiency, and the single shaft solar tracking system that adopts simple north and south to place, according to the rule of sunrise sunset, with the speed at 15Du per hour angle by the east of western rotating shaft, the sun is carried out to low precision tracking, reduce the cost of tracking system, but can realize good tracking effect.Upper and lower two-layer runner mutually independent, be not communicated with mutually, adopt snake pipe to contribute to reduce fluid at the resistance of pipeline, device of working medium and domestic water circulate in opposite directions, have avoided photovoltaic cell upper and lower layers to be heated in the heating final stage of device of working medium and domestic water simultaneously, have guaranteed photovoltaic efficiency.The direct current that photovoltaic cell component produces supplements the generated energy of gas-steam combined power plant by grid-connected inverters.
In Fig. 2,6 CPC condensers being combined to formation photovoltaic and photothermal assembly is a photovoltaic and photothermal unit, the optically focused ratio of single CPC condenser is 8, length is 2m, the temperature rise minimum of single CPCShang fluid passage 30 inner fluids is 10 ℃,, through the CPC of 6 series connection, the temperature rise of top fluid will reach 50 ℃.Take water of condensation fluid as 30 ℃, and the final temperature through 30，Shang fluid passage, upper fluid passage 30 outlet water of condensation will at least reach 80 ℃; The temperature rise minimum of single CPC lower floor runner inner fluid is 8 ℃, take domestic water as 25 ℃, and, after lower fluid conduit 28 heating, the final temperature that lower fluid conduit 28 goes out saliva will at least reach 70 ℃.By series connection and the distributed arrangement mode of a plurality of photovoltaic and photothermals unit, the VDC that PVT photovoltaic and photothermal heat collector 19 produces is delivered directly to local electrical network by controller and inverter, as a part of generated energy, in order to supplement the generated energy of gas-steam combined power plant, reduced to a certain extent cost of electricity-generating.Upper and lower two-layer runner to each photovoltaic and photothermal unit adopts water supply modes in parallel, causes each photovoltaic and photothermal unit.The used heat that photovoltaic cell produces passes to lower fluid conduit 28 by the good heat conductive silica gel heat of heat-conducting property.Domestic water by lower fluid conduit 28 absorbs heat, and the domestic water after being heated is directly admitted to insulation wet pit.
A radiometer is set near PVT photovoltaic and photothermal heat collector 19, be used for measuring intensity of solar radiation, according to intensity of solar radiation size, to flowing into the device of working medium flow of PVT photovoltaic and photothermal heat collector 19Shang fluid passage 30, by priming pump 14, carry out coarse adjustment, the outlet temperature of fluid passage 30 on PVT device is remained in certain scope, and adopt simple solar tracking system to follow the tracks of sunlight, reduce the object that cost of investment but can achieve effective control.When evening or overcast and rainy PVT device quit work, close priming pump 14, stop fluid passage on PVT device 30 to introduce device of working medium, but do not affect the efficiency of boiler of exhaust heat boiler 13.
The utility model can be realized the object of associating energy supply.PVT photovoltaic and photothermal heat collector 19 adopts CPC compound parabolic concentrator, by device of working medium and heat radiation and the heat recovery technology of glass cover-plate to the heat absorption principle of far-infrared light and lower fluid conduit 28 of upper fluid passage 30, take full advantage of solar energy, improved photovoltaic efficiency, the inner upper and lower two-layer water flow passage of PVT photovoltaic and photothermal heat collector 19 adopts snake pipe, Working fluid flow is independent of each other, all adopt stepped heating mode to flow in opposite directions, avoided photovoltaic cell upper and lower surface to be subject to the impact of the device of working medium maximum temperature after upper and lower two-layer runner heating simultaneously, thereby kept higher photovoltaic efficiency.Heating working medium is directly delivered to the main feed-water intake place of gas-steam combined residual heat of electric power plant boiler 13 and then by low-pressure coal saver 7, accelerated steam/water circulating process, improved the efficiency of boiler of exhaust heat boiler 13, indirectly improved the efficiency of steam turbine acting.Face in the situation that current photovoltaic power generation technology and photothermal power generation technology are not yet ripe and universal, with respect to coal-burning power plant, adopt a kind of modified model PVT photovoltaic and photothermal heat collector to combine energy supplying system with Gas-steam Combined Cycle unit, reduce cost of electricity-generating, and there is the environment friendly of height, higher power supply efficiency, better development prospect.
Claims (5)
1. a photovoltaic and photothermal heat collector is combined energy supplying system with Gas-steam Combined Cycle unit, it is characterized in that, it comprises Gas-steam Combined Cycle unit, PVT collecting system and priming pump (14), the part water of condensation that the condensate pump of Gas-steam Combined Cycle unit (12) is discharged enters the heating of PVT collecting system through priming pump (14), enters the device of working medium entrance of low-pressure coal saver (7) of the exhaust heat boiler (13) of Gas-steam Combined Cycle unit after the water of condensation of PVT collecting system heating and all the other water of condensation of condensate pump (12) discharge are converged; The electric energy output end of PVT collecting system is connected with load or electrical network.
2. a kind of photovoltaic and photothermal heat collector according to claim 1 is combined energy supplying system with Gas-steam Combined Cycle unit, it is characterized in that, described PVT collecting system is formed by connecting by a plurality of photovoltaic and photothermal heat collectors (19) series parallel connection, described photovoltaic and photothermal heat collector (19) comprises PVT framework (22), CPC condenser (23), photovoltaic cell component (26), heat conduction board (29) and two armorplate glasses (20), described CPC condenser (23) is arranged on PVT framework (22), described photovoltaic cell component (26) is positioned at the bottom of CPC condenser (23), its shady face is bonded on heat conduction board (29) by adhesive layer (27), in described heat conduction board (29), be provided with lower fluid conduit (28), one end of described lower fluid conduit (28) taps into water, another termination insulation water storage box, two armorplate glasses (20) are positioned at the side to light top of photovoltaic cell component (26), the drain opening of upper fluid passage (30) the one termination condensate pumps (12) that the sidewall of they and CPC condenser (23) surrounds, the device of working medium entrance of the low-pressure coal saver (7) of a termination exhaust heat boiler (13).
3. a kind of photovoltaic and photothermal heat collector according to claim 2 is combined energy supplying system with Gas-steam Combined Cycle unit, it is characterized in that, the shady face of described heat conduction board (29) is provided with heat insulation layer (21), and the top of two armorplate glasses (20) is provided with perspex cover plate (24).
4. a kind of photovoltaic and photothermal heat collector according to claim 3 is combined energy supplying system with Gas-steam Combined Cycle unit, it is characterized in that, is provided with transparent thermal insulation layer (31) on the inwall of described upper fluid passage (30).
5. a kind of photovoltaic and photothermal heat collector according to claim 4 is combined energy supplying system with Gas-steam Combined Cycle unit, it is characterized in that, the water (flow) direction in described lower fluid conduit (28) He Shang fluid passage (30) is contrary.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362577A (en) * | 2013-08-02 | 2013-10-23 | 华北电力大学（保定） | Powering system combining photovoltaic photo-thermal heat collector and fuel gas-steam combined circulation unit |
| CN105892323A (en) * | 2016-05-25 | 2016-08-24 | 无锡蓝天燃机热电有限公司 | Six-in-one integrated power generation control system |
| CN106130473A (en) * | 2016-06-15 | 2016-11-16 | 冯卓林 | A kind of distributed smooth power station hot water machine structure |
-
2013
- 2013-08-02 CN CN201320469595.6U patent/CN203394601U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362577A (en) * | 2013-08-02 | 2013-10-23 | 华北电力大学（保定） | Powering system combining photovoltaic photo-thermal heat collector and fuel gas-steam combined circulation unit |
| CN103362577B (en) * | 2013-08-02 | 2015-05-20 | 华北电力大学（保定） | Powering system combining photovoltaic photo-thermal heat collector and fuel gas-steam combined circulation unit |
| CN105892323A (en) * | 2016-05-25 | 2016-08-24 | 无锡蓝天燃机热电有限公司 | Six-in-one integrated power generation control system |
| CN106130473A (en) * | 2016-06-15 | 2016-11-16 | 冯卓林 | A kind of distributed smooth power station hot water machine structure |
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