CN101586879A - Solar thermal utilization system combined with gas-steam combined cycle - Google Patents
Solar thermal utilization system combined with gas-steam combined cycle Download PDFInfo
- Publication number
- CN101586879A CN101586879A CNA2008102235720A CN200810223572A CN101586879A CN 101586879 A CN101586879 A CN 101586879A CN A2008102235720 A CNA2008102235720 A CN A2008102235720A CN 200810223572 A CN200810223572 A CN 200810223572A CN 101586879 A CN101586879 A CN 101586879A
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- solar energy
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- 238000005057 refrigeration Methods 0.000 claims abstract description 27
- 238000007906 compression Methods 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 48
- 239000007789 gas Substances 0.000 claims description 20
- 239000002918 waste heat Substances 0.000 claims description 16
- 239000000567 combustion gas Substances 0.000 claims description 10
- 230000001172 regenerating Effects 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010248 power generation Methods 0.000 abstract description 5
- 239000000969 carrier Substances 0.000 abstract 2
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- 238000004134 energy conservation Methods 0.000 abstract 1
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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
- Y02E10/44—Heat exchange systems
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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
- Y02E20/14—Combined heat and power generation [CHP]
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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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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention discloses a solar thermal utilization system combined with gas-steam combined cycle, which comprises a solar condensation heat collection subsystem, a refrigeration subsystem, a heat exchange device, a heat storage device and a gas-steam combined cycle power subsystem, wherein solar radiation energy is transformed into heat energy; a heat carrier preheats air and fuel which are used by the gas-steam combined cycle power subsystem through the heat exchange device; and then the heat carrier after the heat exchange drives the refrigeration subsystem for refrigeration to reduce the temperature of the air in an intercooler. The system gradiently utilizes the heat energy provided by the solar condensation heat collection subsystem, solves the problem of low utilization rate of solar energy, and also solves the problem of low temperature of the air at an outlet of an air compressor with multi-stage compression and intermediate cooling; and the system reduces the power consumption of the air compressor on the basis of ensuring the temperature of the air which enters a combustion chamber, improves the power generation efficiency of the gas-steam combined cycle, and achieves the aims of energy conservation and consumption reduction.
Description
Technical field
The invention belongs to the solar energy utilization technique field, be specifically related to a kind of Solar Energy Heat Utilization System that combines with the gas-steam combined circulation.
Background technology
Be summarized as follows about solar energy thermal-power-generating and gas-steam combined circulating generation in the prior art.
1, groove type line-focusing solar heat generating system
The groove type line-focusing solar heat generating system is to utilize the groove type line-focusing speculum to reach the solar energy thermal-power-generating form of optically focused requirement, the groove type line-focusing speculum is many to carry out the one dimension tracking to the sun more, its optically focused is than between 40～80, and the temperature of thermal-arrest working medium generally is lower than 400 ℃.System usually by slot light collection heat collector, regenerative apparatus, TRT or/and supplementary energy device (as boiler) etc. form.The groove type line-focusing solar heat generating system generally adopts conduction oil as thermal-arrest working medium at present, the low temperature conduction oil is fed to solar energy heat collection pipe through oil pump, be heated to about 390 ℃, become high temperature heat conductive oil, high temperature heat conductive oil by devices such as steam reheater, superheater, evaporimeter and preheaters, is delivered to the solar energy of collecting in the vapor recycle successively, produces about 370 ℃ superheated steam, enter in the steam turbine and do work, the output electric energy.The present major obstacle of groove type line-focusing solar heat generating system is that thermal-arrest working medium temperature is not high, and the thermal efficiency of power sub-system is on the low side; Subject matter is after system's heat-collecting temperature is higher than 400 ℃, and the vacuum of solar thermal collector is difficult to guarantee, the life-span reduces rapidly, and collecting efficiency also sharply descends.For example, when beam radia intensity be 800W/m
2, the collecting efficiency when temperature is 500 ℃ is 0.5, reduces by 28.6% approximately and temperature is the collecting efficiency of 250 ℃ of 0.7,500 ℃ of ratios when being 250 ℃.Restriction because of condition such as the geometric concentrating ratio of groove type line-focusing speculum is low makes that the power sub-system thermal efficiency in the groove type line-focusing solar heat generating system is on the low side, and about 35%, therefore, the efficiency of utilization of groove type line-focusing solar is lower usually.
2, tower-type solar thermal power generating system
Solar thermal central receiver power system is also referred to as centralized solar heat power generation system, and between 200～700, system's maximum operating temperature can reach 1500 ℃ to system's optically focused ratio usually.Tower-type solar thermal power generating system is made up of parts such as heliostat, heat dump, regenerative apparatus, steam generation device and heat-actuated devices usually.For capturing solar radiation to greatest extent, heliostat adopts the double-axis tracking device usually.Solar radiation through the heliostat reflection gathers on the heat dump of cat head, the heat transmission working medium in the heating heat dump; The superheated steam that steam generation device produced is realized the hot merit conversion after entering power sub-system, finishes electric energy output.Tower-type solar thermal power generating system enjoys common people to pay close attention to after the eighties in 20th century, at present, has in the world wide during many demonstration power stations are moving or building.Compare with the groove type line-focusing solar heat generating system, the heat-collecting temperature height of tower-type solar thermal power generating system is easily produced high parameter steam, so the corresponding raising of the efficient of heat-actuated device.At present, the major obstacle of tower-type solar thermal power generating system is, when the light and heat collection power of heliostat field increases, be that the collecting efficiency of heliostat field decreased, for example after single tower solar heat power generation system maximized, when the optically focused power of heliostat field is 50MW, its average annual efficient is 0.6, and when optically focused power was 500MW, an efficient was 0.4, and increase along with optically focused power, the trend that field efficient reduces is accelerated, and therefore, the power system capacity difficulty that increases tower type solar energy thermal power generation is bigger.
3, combined cycle generation system of fuel gas-steam
The gas-steam combined EGR is a kind of comprehensive utilization of energy technology that later 1940s begins to grow up, it is characterized in that the gas turbine cycle that will have higher average endothermic temperature combines with the steam turbine circulation that has than the harmonic(-)mean exothermic temperature, make the used heat of gas turbine become the heating source that steam turbine circulates, reach and maximize favourable factors and minimize unfavourable ones, the purpose that remedies mutually makes the heat energy utilization level of whole combined cycle all be significantly improved than gas turbine cycle or steam turbine circulation.At present, the entrance flue gas temperature of gas turbine has reached 1430 ℃, and the generating efficiency of large-scale gas-steam combined circulation is about 55%.Be in the consideration to the factors such as heat resisting temperature of material, the space that the generating efficiency of independent gas-steam combined circulation promotes is little.In the gas turbine of combined cycle, large-scale gas turbine particularly, the power consumption of air compressor is bigger, can account for about 60% of power that combustion gas turbine produces approximately.If adopt the intercooled air compressor of multi-stage compression,, also reduced the air themperature that enters the combustion chamber simultaneously though reduced the power consumption of air compressor.If keep the entrance flue gas temperature of identical combustion gas turbine, need to consume more fuel.Take all factors into consideration two kinds of above-mentioned factors, the efficiency change of system is little.
From top analysis as can be seen, the groove type line-focusing mode can produce the middle temperature energy about 400 ℃ at present, if this part energy directly is used for generating electricity, average annual generating efficiency remains at low levels about 10%; Tower-type solar thermal power generating system, though its heat-collecting temperature increases, power plant's capacity is unsuitable excessive; Combined cycle generation system of fuel gas-steam is subjected to the heatproof of combustion gas turbine material, the restriction of aspect such as wear-resisting and corrosion-resistant, and restriction has been received in the lifting of combined cycle generation efficient.
Summary of the invention
The objective of the invention is to, propose a kind of system of the solar thermal utilization that combines with the gas-steam combined circulation.The energy that this system adopts the solar energy light gathering and heat collecting subsystem to produce comes preheating to enter the air and the fuel of combustion chamber, continue as refrigeration subsystem energy is provided through carrying out heat-carrying agent after the heat exchange with air and fuel, the cold that provides of the charge air cooler of the intercooled air compressor of multi-stage compression is provided refrigeration subsystem.
For achieving the above object, the invention provides following technical scheme.A kind of Solar Energy Heat Utilization System that combines with the gas-steam combined circulation, this system comprise solar energy light gathering and heat collecting subsystem, refrigeration subsystem, heat exchange and regenerative apparatus and gas-steam combined circulation power subsystem; Heat-exchanger rig comprises high-temperature heat exchanger and low temperature heat exchanger; The solar energy light gathering and heat collecting subsystem is converted to heat energy with solar radiation energy, by heat-carrying agent through air and fuel that the heat-exchanger rig preheated fuel gas-the Steam Combined Cycle power sub-system is used, carry out heat-carrying agent after the heat exchange with air and fuel and continue as refrigeration subsystem again behind heat-exchanger rig energy is provided, the cold that provides of the charge air cooler of the intercooled air compressor of multi-stage compression is provided refrigeration subsystem.
In the above-mentioned scheme, described gas-steam combined circulation power subsystem is a TRT, be used for heat energy is converted into electric energy, comprise the intercooled air compressor of multi-stage compression, charge air cooler, gas-turbine combustion chamber, combustion gas turbine, gas electricity generator, waste heat boiler, steam turbine, steam-driven generator, condenser, cooling tower and feed pump.
In the aforesaid scheme, the intercooled air compressor of described multi-stage compression is at least the intercooled air compressor of two stages of compression, is used to improve the pressure of the air that enters gas-turbine combustion chamber.
In the aforesaid scheme, described waste heat boiler can adopt forms such as single pressure, two pressure or multiple pressure form, for steam turbine provides steam.
In the aforesaid scheme, the solar radiation energy that described solar energy light gathering and heat collecting subsystem is collected at first is used to improve the air that enters gas-turbine combustion chamber and the temperature of fuel; Through with air and fuel heat exchange after heat-carrying agent, continue as refrigeration subsystem energy be provided.
In the aforesaid scheme, described high-temperature heat-exchanging is used to improve the air that enters gas-turbine combustion chamber and the temperature of fuel, is located at the final stage exit of the intercooled air compressor of multi-stage compression.
In the aforesaid scheme, the heat-carrying agent after described process and air and the fuel heat exchange carries out heat exchange with heat-carrying agent and refrigeration subsystem, for refrigeration subsystem provides energy in low temperature heat exchanger.
In the aforesaid scheme, also comprise a regenerative apparatus, be used to store solar energy light gathering and heat collecting subsystem energy more than needed, and when the solar radiant energy quantity not sufficient, continue to provide energy to heat-exchanger rig.
In the aforesaid scheme, described refrigeration subsystem is used to the charge air cooler of the intercooled air compressor of multi-stage compression that cold is provided, to reduce the air themperature at air compressor inlets at different levels place.
In the aforesaid scheme, described solar energy light gathering and heat collecting subsystem comprises condenser field and heat dump; The condenser field receives also converges solar radiation energy, and the solar radiation energy that receives is passed to heat-carrying agent in the heat dump, is the heat energy of heat-carrying agent with conversion of solar energy.
In the aforesaid scheme, described solar energy light gathering and heat collecting subsystem also comprises the heat-carrying agent pump, and the heat-carrying agent pump is used to improve the pressure of heat-carrying agent, overcomes the drag losses in the transmission course.
The present invention has following beneficial effect:
1, the energy heat exchange in the high and low temperature heat exchanger respectively that produces of solar energy light gathering and heat collecting subsystem of the present invention is used to heat the air that enters the combustion chamber, fuel and for refrigeration subsystem provides energy, has embodied the cascade utilization principle of energy.
2, the high temperature section energy of solar energy light gathering and heat collecting subsystem generation of the present invention adds at the entry of combustion chamber place, through the synergy of gas turbine and Steam Power Equipment, has improved the energy utilization ratio that the solar energy light gathering and heat collecting subsystem produces.
3, the energy preheating of solar energy light gathering and heat collecting subsystem generation of the present invention enters the air and the fuel of combustion chamber, thereby has saved the Fuel Consumption of gas turbine, has improved the generating efficiency of combined cycle.
4, the present invention utilizes the energy-producing high temperature section of solar energy light gathering and heat collecting subsystem to heat air and the fuel that enters the combustion chamber, utilizes the low-temperature zone energy to drive refrigeration subsystem operation, for the charge air cooler of air compressor provides cold.Utilize the present invention can solve power consumption and the two problem that can not take into account of outlet air temperature of air compressor.
5, the heat-carrying agent in the solar energy light gathering and heat collecting subsystem among the present invention can be selected conduction oil, high-temperature molten salt or high-temperature phase-change medium, makes system form more reasonable.
In sum, the solar thermal utilization mode among the present invention, not only cascade utilization the heat energy that provides of solar energy light gathering and heat collecting subsystem, solved the low problem of solar energy utilization ratio; Solved the low problem of the intercooled air compressor outlet air temperature of multi-stage compression simultaneously, on the basis of the air themperature that guarantees to enter the combustion chamber, reduced the power consumption of air compressor, thereby improved the generating efficiency of gas-steam combined circulation, reached energy saving purposes.
Description of drawings
Fig. 1 is the Solar Energy Heat Utilization System principle schematic that combines with the gas-steam combined circulation proposed by the invention;
Fig. 2 is the schematic flow sheet according to the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation of second embodiment of the invention;
Fig. 3 is the schematic flow sheet according to the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation of third embodiment of the invention.
Be labeled as among the figure: 1-air first order compressor, 2-charge air cooler, 3-air high stage compressor, the 4-high-temperature heat exchanger, 5-solar energy light gathering and heat collecting subsystem, 6-heat-carrying agent pump, the 7-gas-turbine combustion chamber, 8-fuel gas generation device, 9-waste heat boiler, the 10-steam electric power generator, 11-absorption type refrigerating unit, 12-cryogenic heat exchanger, 13-groove type line-focusing Jing Chang, the 14-sun, 15-storage heater, the 16-A valve, 17-B valve, 18-C valve, the 19-D valve, 20-cooling tower, 21-A water pump, the 22-B water pump, 23-combustion gas turbine, 24-gas electricity generator, the 25-steam turbine, the 26-steam-driven generator, 27-condenser, the tower heliostat of 28-field.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Embodiments of the invention 1.The Solar Energy Heat Utilization System that combines with the gas-steam combined circulation proposed by the invention comprises solar energy light gathering and heat collecting subsystem, refrigeration subsystem, heat exchange and regenerative apparatus and gas-steam combined circulation power subsystem; Heat-exchanger rig comprises high-temperature heat exchanger and low temperature heat exchanger.The solar energy light gathering and heat collecting subsystem is used for receiving and converging solar radiation energy, and the solar radiation energy that receives is converted into the heat energy of heat-carrying agent; Regenerative apparatus not only is used to store the energy more than needed of solar energy light gathering and heat collecting subsystem output, and continues to provide heat energy to heat-exchanger rig when solar radiation is not enough; The energy of solar energy light gathering and heat collecting subsystem output is the final stage outlet air of the air compressor of the multistage cooling of heating in high-temperature heat-exchanging at first, and the heat-carrying agent that carries out after the heat exchange with the final stage outlet air provides energy for refrigeration subsystem in cryogenic heat exchanger; Refrigeration subsystem provides cold for the charge air cooler of the intercooled air compressor of multi-stage compression; Air and fuel enter the combustion chamber after by solar energy heating jointly, and the high-temperature flue gas after the burning is exported electric energy after the utilization of gas and steam turbine combined cycle power sub-system.
The solar energy light gathering and heat collecting subsystem mainly comprises condenser field, heat dump and heat-carrying agent pump.The condenser field receives also converges solar radiation energy, and the solar radiation energy that receives is passed to heat-carrying agent in the heat dump, is the heat energy of heat-carrying agent with conversion of solar energy.The heat-carrying agent pump is used to improve the pressure of heat-carrying agent, to overcome the drag losses of pipeline and heat transmission equipment.Regenerative apparatus is used to store the energy of the high temperature heat-carrying agent more than needed of solar energy light gathering and heat collecting subsystem output, and when solar energy was not enough, regenerative apparatus can continue to provide energy for heat-exchanger rig.The solar energy that the solar energy light gathering and heat collecting subsystem is collected at first is used to improve the air that enters gas-turbine combustion chamber and the temperature of fuel; Through with air and fuel heat exchange after heat-carrying agent, continue as the refrigeration subsystem body energy be provided.Refrigeration subsystem provides cold for the charge air cooler of the intercooled air compressor of multi-stage compression, to reduce the air themperature at place, suction port of compressor at different levels.Gas-steam combined circulation power subsystem is a TRT, be used for heat energy is converted into electric energy, mainly comprise capital equipments such as the intercooled air compressor of multi-stage compression, charge air cooler, combustion chamber, combustion gas turbine, generator, waste heat boiler, steam turbine, condenser, cooling tower and feed pump.Gas turbine adopts the intercooled air compressor of multi-stage compression (more than or equal to two-stage), is used to improve the pressure of the air that enters the combustion chamber.Waste heat boiler can adopt single pressure, two pressure or multiple pressure form according to the delivery temperature of gas turbine, for steam turbine provides steam.The final stage outlet air of energy that the solar energy light gathering and heat collecting subsystem is collected in high-temperature heat exchanger and the intercooled air compressor of multi-stage compression carries out heat exchange.Heat-carrying agent and refrigeration subsystem are carried out heat exchange in low temperature heat exchanger, for refrigeration subsystem provides energy.
As shown in Figure 1, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation proposed by the invention specifically comprises air first order compressor 1, charge air cooler 2, air final stage compressor 3, high-temperature heat exchanger 4, field, solar energy border 5, heat-carrying agent pump 6, gas-turbine combustion chamber 7, fuel gas generation device 8, waste heat boiler 9, steam electric power generator 10, absorption type refrigerating unit 11, cryogenic heat exchanger 12 and storage heater 15.Wherein, air enters intercooler 2 after 1 compression of first order compressor, fuel is heated in high-temperature heat-exchanging 4 together with the air of second level air compressor 3 outlets, heated air and fuel enter gas-turbine combustion chamber 7 jointly, high-temperature flue gas after the burning enters fuel gas generation device 8, exports a part of electric energy.The high-temperature exhaust air of gas turbine enters waste heat boiler 9, produces the steam under the relevant pressure, and steam enters steam electric power generator 10, the output electric energy.For absorption type refrigerating unit 11 provides energy, absorption type refrigerating unit provides cold for charge air cooler 2 to the heat-carrying agent of the solar energy light gathering and heat collecting subsystem 5 after high-temperature heat-exchanging 4 heat exchange in cryogenic heat exchanger 12.The heat-carrying agent that flows out from cryogenic heat exchanger 12 is sent the solar energy mirror field back to through heat-carrying agent pump 6, finishes the whole circulation process.
Embodiments of the invention 2.Fig. 2 is the schematic flow sheet of the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation of second embodiment of the invention.In Fig. 2, solar radiation is 13 gatherings through groove type line-focusing mirror field, transfer out heat energy through heat-carrying agent.Air enters into charge air cooler 2 after 1 compression of first order air compressor, the air and the fuel that come out from high stage compressor 3 are heated high-temperature heat-exchanging 4, heated air and fuel enter into combustion chamber 7 jointly, high-temperature flue gas after the burning enters into combustion gas turbine 23, output electric energy behind gas electricity generator 24; Combustion gas turbine 23 and gas electricity generator 24 constitute fuel gas generation device 8.Combustion turbine exhaustion enters waste heat boiler 9, and after heat exchange, the steam that waste heat boiler 9 produces enters into steam turbine 25, output electric energy behind steam-driven generator 26; Steam turbine 25 and steam-driven generator constitute steam electric power generator 10; Steam condenses in condenser 21, and condensate water enters the heat that waste heat boiler 9 absorbs combustion turbine exhaustion behind B water pump 22.Heat-carrying agent behind high-temperature heat-exchanging 4 enters into cryogenic heat exchanger 12, and cryogenic heat exchanger 12 provides energy for absorption type refrigerating unit 11, and refrigerating plant 11 provides cold for charge air cooler 2.When solar radiation energy is abundant, remove a part of air and fuel that high-temperature heat-exchanging 4 heating enter combustion chamber 7 that enters from the heat-carrying agent of field, groove type line-focusing border output, the heat-carrying agent of part more than needed enters into storage heater 15, and A valve 16, B valve 17, C valve 18 and D valve 19 are opened at this moment; When not having solar radiation, B valve 17 and C valve 18 are closed, and storage heater output heat-carrying agent is in the high and low temperature heat exchanger, and the system of continuing as provides energy.Cooling tower 20 and A water pump 21 provide cooling water for absorption type refrigerating unit 11.
Embodiments of the invention 3.Fig. 3 is the schematic flow sheet according to the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation of third embodiment of the invention.In Fig. 3, the radiation of the sun 14 is 28 gatherings through tower heliostat field, transfer out heat energy through heat-carrying agent.Air enters into charge air cooler 2 after 1 compression of first order air compressor, the air and the fuel that come out from high stage compressor 3 are heated high-temperature heat-exchanging 4, heated air and fuel enter into combustion chamber 7 jointly, high-temperature flue gas after the burning enters into combustion gas turbine 23, output electric energy behind gas electricity generator 24.Combustion turbine exhaustion enters waste heat boiler 9, and after heat exchange, the steam that waste heat boiler 9 produces enters into steam turbine 25, output electric energy behind steam-driven generator 26; Steam condenses in condenser 21, and condensate water enters the heat that waste heat boiler 9 absorbs combustion turbine exhaustion behind B water pump 22.Heat-carrying agent behind high-temperature heat-exchanging 4 enters into cryogenic heat exchanger 12, and cryogenic heat exchanger 12 provides energy for absorption type refrigerating unit 11, and refrigerating plant 11 provides cold for charge air cooler 2.When solar radiation energy is abundant, remove a part of air and fuel that high-temperature heat-exchanging 4 heating enter combustion chamber 7 that enters from the heat-carrying agent of field, groove type line-focusing border output, the heat-carrying agent of part more than needed enters into storage heater 15, and A valve 16, B valve 17, C valve 18 and D valve 19 are opened at this moment; When not having solar radiation, B valve 17 and C valve 18 are closed, and storage heater output heat-carrying agent is in the high and low temperature heat exchanger, and the system of continuing as provides energy.Cooling tower 20 and A water pump 21 provide cooling water for absorption type refrigerating unit 11.
The present invention has carried out sunykatuib analysis to the experimental data of above-mentioned second embodiment and the 3rd embodiment respectively.For second embodiment, the major parameter in the system is as shown in table 1, and its thermal performance is as shown in table 3.The heat-carrying agent of two embodiment can be selected according to actual conditions.For the 3rd embodiment, the major parameter in the system is as shown in table 2, and its thermal performance is as shown in table 3.
System proposed by the invention is suitable for the system integration of solar energy and gas-steam combined circulation, and wherein the heat-carrying agent in the solar energy light gathering and heat collecting subsystem can adopt conduction oil, high-temperature molten salt or high-temperature phase-change medium etc.The Solar Energy Heat Utilization System that combines with the gas-steam combined circulation that the present invention proposes, for improving the energy-producing utilization rate in solar energy mirror place, solve power consumption and the two problem that can not take into account of outlet air temperature of air compressor, have unrivaled superiority aspect the Fuel Consumption that reduces the gas-steam combined circulation.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above is only specifically given an example for of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Table 1 embodiment 2 system flow parameter lists
| The logistics sequence number | Temperature (℃) | Pressure (bar) | The logistics sequence number | Temperature (℃) | Pressure (bar) |
| S1 | 390 | 3.00 | S13 | 32 | 1.60 |
| S2 | 272 | 2.30 | S14 | 180 | 2.00 |
| S3 | 185 | 1.50 | S15 | 165 | 1.50 |
| S4 | 150 | 5.00 | S16 | 7 | 2.00 |
| S5 | 25 | 1.00 | S17 | 12 | 1.50 |
| S6 | 370 | 20.00 | S18 | 1327 | 20.00 |
| S7 | 370 | 20.00 | S19 | 560 | 1.30 |
| S8 | 188 | 20.70 | S20 | 120 | 1.05 |
| S9 | 25 | 4.31 | S21 | 510 | 83.80 |
| S10 | 210 | 4.81 | S22 | 33 | 0.05 |
| S11 | 25 | 1.00 | S23 | 105 | 85.00 |
| S12 | 37 | 2.50 |
Table 2 embodiment 3 system flow parameter lists
| The logistics sequence number | Temperature (℃) | Pressure (bar) | The logistics sequence number | Temperature (℃) | Pressure (bar) |
| S1 | 550 | 3.00 | S13 | 32 | 1.60 |
| S2 | 298 | 2.30 | S14 | 180 | 2.00 |
| S3 | 185 | 1.50 | S15 | 165 | 1.50 |
| S4 | 150 | 5.00 | S16 | 7 | 2.00 |
| S5 | 25 | 1.00 | S17 | 12 | 1.50 |
| S6 | 500 | 20.00 | S18 | 1327 | 20.00 |
| S7 | 500 | 20.00 | S19 | 560 | 1.30 |
| S8 | 188 | 20.70 | S20 | 120 | 1.05 |
| S9 | 25 | 4.31 | S21 | 510 | 83.80 |
| S10 | 210 | 4.81 | S22 | 33 | 0.0 |
| S11 | 25 | 1.00 | S23 | 105 | 85.00 |
| S12 | 37 | 2.50 |
Table 3 system thermal performance table
| Project | The simple association circulation that does not have solar energy to utilize | Embodiment 2 | Embodiment 3 |
| DNI(W/m 2) | 0 | 800 | 800 |
| Slot type mirror field optics efficient (%) | 0 | 80 | 0 |
| Tower mirror field optics efficient (%) | 0 | 0 | 75 |
| Heat dump efficient (%) | 0 | 90 | 80 |
| Slot type mirror scene is amassed (ten thousand m 2) | 0 | 17.7 | 0 |
| Tower mirror scene is amassed (ten thousand m 2) | 0 | 0 | 29.8 |
| Combustion turbine power (MW) | 233 | 233 | 233 |
| Gas turbine power generation efficient (%) | 37.3 | 37.3 | 37.3 |
| The gas turbine inlet air temperature (℃) | 1327 | 1327 | 1327 |
| The combustion turbine exhaustion temperature (℃) | 560 | 560 | 560 |
| The waste heat boiler form | The single pressure | The single pressure | The single pressure |
| Steam turbine power (MW) | 115 | 115 | 115 |
| Steam turbine generating efficiency (%) | 38.9 | 38.9 | 38.9 |
| Steam turbine exhaust steam pressure (bar) | 0.005 | 0.005 | 0.005 |
| The total generating efficiency of system (%) | 57 | 61.5 | 69.5 |
Claims (11)
1, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation is characterized in that, this system comprises solar energy light gathering and heat collecting subsystem, refrigeration subsystem, heat exchange and regenerative apparatus and gas-steam combined circulation power subsystem; Heat-exchanger rig comprises high-temperature heat exchanger and low temperature heat exchanger; The solar energy light gathering and heat collecting subsystem is converted to heat energy with solar radiation energy, air and the fuel through heat-exchanger rig gas-steam combined circulation power subsystem used by heat-carrying agent carry out preheating, carry out heat-carrying agent after the heat exchange with air and fuel and continue as refrigeration subsystem again behind heat-exchanger rig energy is provided, the cold that provides of the charge air cooler of the intercooled air compressor of multi-stage compression is provided refrigeration subsystem.
2, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 1, it is characterized in that, described gas-steam combined circulation power subsystem is a TRT, be used for heat energy is converted into electric energy, comprise the intercooled air compressor of multi-stage compression, charge air cooler, gas-turbine combustion chamber, combustion gas turbine, gas electricity generator, waste heat boiler, steam turbine, steam-driven generator, condenser, cooling tower and feed pump.
3, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 2, it is characterized in that, the intercooled air compressor of described multi-stage compression, be at least the intercooled air compressor of two stages of compression, be used to improve the pressure of the air that enters gas-turbine combustion chamber.
4, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 2 is characterized in that, described waste heat boiler can adopt forms such as single pressure, two pressure or multiple pressure, for steam turbine provides steam.
5, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 1, it is characterized in that the solar radiation energy that the solar energy light gathering and heat collecting subsystem is collected at first is used to improve the air that enters gas-turbine combustion chamber and the temperature of fuel; Through with air and fuel heat exchange after heat-carrying agent, continue as refrigeration subsystem energy be provided.
6, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 5, it is characterized in that, described high-temperature heat-exchanging is used to improve the air that enters gas-turbine combustion chamber and the temperature of fuel, is located at the final stage exit of the intercooled air compressor of multi-stage compression.
7, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 5 is characterized in that, through with air and fuel heat exchange after heat-carrying agent, in cryogenic heat exchanger, provide energy for refrigeration subsystem.
8, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 1, it is characterized in that, also comprise a regenerative apparatus, be used to store solar energy light gathering and heat collecting subsystem energy more than needed, and when the solar radiant energy quantity not sufficient, continue to provide energy to heat-exchanger rig.
9, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 1, it is characterized in that, described refrigeration subsystem, be used to the charge air cooler of the intercooled air compressor of multi-stage compression that cold is provided, to reduce the air themperature at air compressor inlets at different levels place.
10, according to the arbitrary described Solar Energy Heat Utilization System that combines with the gas-steam combined circulation of claim 1 to 9, it is characterized in that described solar energy light gathering and heat collecting subsystem comprises condenser field and heat dump; The condenser field receives also converges solar radiation energy, and the solar radiation energy that receives is passed to heat-carrying agent in the heat dump, is the heat energy of heat-carrying agent with conversion of solar energy.
11, the Solar Energy Heat Utilization System that combines with the gas-steam combined circulation according to claim 10, it is characterized in that, described solar energy light gathering and heat collecting subsystem also comprises the heat-carrying agent pump, and the heat-carrying agent pump is used to improve the pressure of heat-carrying agent, overcomes the drag losses in the transmission course.
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