CN101509472A - Disperse type low-temperature solar thermal power generation system and power generation technique - Google Patents
Disperse type low-temperature solar thermal power generation system and power generation technique Download PDFInfo
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- CN101509472A CN101509472A CNA2008100587142A CN200810058714A CN101509472A CN 101509472 A CN101509472 A CN 101509472A CN A2008100587142 A CNA2008100587142 A CN A2008100587142A CN 200810058714 A CN200810058714 A CN 200810058714A CN 101509472 A CN101509472 A CN 101509472A
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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 relates to a distributed low-temperature solar thermal generating system and generating technology, which are a solar heat-collecting heater equipped according to generating capacity and a circulation line thereof; equipment and mating parts such as a plate heat exchanger, a condenser, a reservoir, a vapor liquid separator, a working medium pressure pump, a thermal storage pot, a cooling water recycle pump, a cooling tower and a valve are installed and connected; the charging amount of working medium is calculated according to the volume of the line, n-pentane (C5H12) or n-hexane (C6H4) is measured and charged in the circulation line. In the invention, low density solar energy can be directly and high-efficiently converted into high-grade electrical energy, thereby realizing clean electric power generation process of real zero discharge and avoiding electric power line loss of large generating system centralized in the traditional area and great investment and maintenance of transmission and distribution systems.
Description
Technical field
The present invention relates to a kind of disperse type low-temperature solar thermal power generation system and electrification technique as well as, is working medium and power generation system that a kind of solar low-temperature thermal power reclaims, belongs to the resource and environment technical field.
Background technique
Electrical production is being played the part of more and more important role in industrial and agricultural production, we can say that power supply is the bottleneck of entire society's development.Since oneth century, power industry all is seriously to depend on fossil fuels such as coal, though in recent years along with The Application of Technology such as overcritical Rankine cycles, the coal electrical efficiency progressively improves (state-of-the-art technology can reach nearly 50% the thermal efficiency in the world now), but power industry still is carbon dioxide and the main emission source of the serious environmental contaminants of sulfur dioxide, while is along with the exhaustion of fossil fuel, the cost of exploitation and difficulty can be increasing, therefore strengthen dynamics to new energy development, thereby alleviating national product and the life process degree of dependence to fossil fuel gradually, is the unique selection that the mankind must face.The sun is the source of all energy; the key that solves human energy crisis is beyond doubt to the directly efficient development and utilization of solar energy; done a few thing abroad in this respect, but mainly be to be research aspect the high temperature solar heat power generating system of water vapor: be broadly divided into slot type focusing, tower type focusing and an official document or note formula focused solar energy heating power generating three big systems in working medium.The groove type line-focusing system that began to develop in 1980 as the LUZ company of the U.S. and Israel associating, the working medium of its Rankine cycle is water, adopt the vapor wheel machine driving generator to generate electricity, now realized the commercialization of capacity 14-80MW series power equipment, as the said firm in 9 the large commercial groove type paraboloid mirror line-focusing solar heat power generating systems (SEGSI-SEGSIX) that successively build up in Mo Yafu (Mojave) desert in the california south of the U.S. in the period of the 1985-1991, total capacity is 354MW, annual electricity generating capacity is 10.8 hundred million degree, system effectiveness is 13.6%, expenditure of construction the 3011-5976 dollar/kilowatt, cost of electricity-generating is at 12-26.3 cent/degree; And for example the U.S. in April nineteen eighty-two near the desert the Barstow of california south build up the exemplary tower type solar heat power generating system of " No. one, the sun ", also be to adopt the steam turbine power generation mode, its generate output is 10MW, because this device can improve the running temperature of system to 565-1049 ℃, its total generating efficiency can reach 25-28%; Because the disc type solar energy power generation system can also be brought up to 750-1382 ℃ with the running temperature of system, can also obtain higher efficient, the U.S. is studying this class model machine energetically.The human real paces of the mythology of " doing sth. beyond one's ability " of realizing are being accelerated rapidly.Research to disperse type low-temperature solar thermal power generation system is less relatively, and vapour condenser divides two kinds that adopt water-cooled and air cooling.Adopting under the situation of water-cooled, the temperature rise of the import and export of water side little (as about 5 ℃) adopts that pure working medium has simply, working medium stable performance, reliable advantage.
Summary of the invention
The purpose of this invention is to provide a kind of disperse type low-temperature solar thermal power generation system and electrification technique as well as, is to adopt pentane (C
5H
12) or n-hexane (C
6H
14) pure working medium is as the disperse type low-temperature solar thermal power generation system of cycle fluid, this system can be high-grade electric energy with low-density solar energy converting to greatest extent, this technology is provided with the heat accumulation measure in system, make it more can adapt to the variation needs of solar energy intensity, significant meaning is arranged for promoting disperse type low-temperature solar thermal power generation technology.
Solving the scheme that technical problem of the present invention adopts is:
Power generation system of the present invention comprises four loops, it at first is the solar energy heat-storage loop, conduction oil (or water) is walked in the inside, heating agent loop in the middle of being afterwards, (or water) goes rancid in the inside, its effect is to the cycle fluid in the following loop heat delivered, getting off is low boiling working fluid power cycle loop again, deep fat (water) in cycle fluid in this loop and the middle heating agent comes heat-shift by plate type heat exchanger, be the chilled(cooling) water return (CWR) at last, the main effect in this loop is that the heat of condensation of turbine steam discharge is got rid of.The solar energy heat-storage loop is that circular-pump is inserted by solar heat oil circulating pipe and electrically-controlled valve V3 in the bottom of heat storage can, and the top of heat storage can is received in the import of receiving the solar energy heating heater again, the outlet of solar energy heating heater by pipeline; V1, V2, V3 are electrically-controlled valve, and when sunny, V2 closes, and V1, V3 open, and can generate electricity simultaneously and heat accumulation, and when sunlight was not enough, V2 opened, and V1, V3 close, and can utilize the heat in the heat reservoir that deep fat is carried out heat again.Heating agent loop branch has two kinds of situations promptly: first kind of situation, when the outlet temperature of solar energy heating heater meets or exceeds design load, this moment sun intensity abundance, electrically-controlled valve V1 and V3 open, V2 closes, deep fat from solar heater: the hot oil inlet that the pipeline of leading up to is received plate type heat exchanger links to each other, the hot oil outlet of plate type heat exchanger is connected to the inlet of recycle pump, in plate type heat exchanger the heat transferred cycle fluid, be recycled pump again and deliver to the oil return interface of solar heater by pipeline, heat accumulation is carried out on other one road top of inserting heat storage can, again from the outlet of heat storage can by the inlet of V3 to recycle pump; Second kind of situation is when the outlet temperature of solar energy heating heater is lower than design load, this moment sun insufficient strength, electrically-controlled valve V1 and V3 close, V2 opens, the deep fat that comes out from the preliminary heating of solar heater this moment passes through the heating once more of heat storage can again, enters plate type heat exchanger through V2; Low boiling working fluid power cycle loop links to each other with water-cooled condenser by blow-off line for the outlet of turbine steam discharge, the water-cooled condenser outlet is connected to working medium liquid-storage container inlet by pipeline, the inlet of working medium compression pump is received in the outlet of working medium liquid-storage container, working medium pressurization delivery side of pump is received plate type heat exchanger by pipeline cold fluid ingress, the cold fluid outlet of plate type heat exchanger inserts the ingress of vapor-liquid separator again by pipeline, the dry saturated vapor outlet of vapor-liquid separator links to each other with the main steam inlet of organic turbine by pipeline, and organic turbine drives generator by shaft coupling and gear; The chilled(cooling) water return (CWR) is inserted cooling water circulating pump for being stored in the catch basin through the water after the cooling of cooling tower with pipeline, sends into water-cooled condenser by the pump pressurization, has absorbed the heat of condensation hot water afterwards of working medium, delivers to the water distributor inlet of cooling tower again with pipeline.
This power generation system power cycle is used pentane (C
5H
12) or n-hexane (C
6H
14) pure working medium;
This power generation system is used normal pressure or low pressure (≤0.6MPa) solar energy deep fat (water) system (solar thermal collector can be board-like or electron tubes type), cycle fluid in solar energy deep fat (water) system can adopt conduction oil or water, and its outlet temperature is more than 60 ℃;
This power generation system can store the heat energy of solar energy, by on the solar energy heat-storage pipeline control valve being set, can realize the accumulation of heat of thermal accumulator and the conversion of heat release operating mode as required.
This power generation system is used for the distributing generating occasion of capacity within 100Kw.
The vapour condenser of this power generation system adopts the indirect type of cooling of water-cooled condenser.
This power generation system is provided with thermal accumulator, can the heat of solar thermal collector be stored, and thermal accumulator can be transformed into the heat release operating mode again in needs.
Electrification technique as well as of the present invention is:
(1) generate output on demand is equipped with solar thermal collector and circulation loop thereof;
(2) circulating load and the pipeline pressure drop according to the required working medium of Rankine cycle system requires to install the needed copper pipe of power cycle road;
(3) install and connect equipment, accessories such as organic turbine (or decompressor), plate type heat exchanger (heating fumigators), vapour condenser, liquid-storage container, vapor-liquid separator, working medium compression pump, heat storage can, cooling water circulating pump, cooling tower and valve;
(4) according to pipeline volume calculations working medium charging amount, with pentane (C
5H
12) or n-hexane (C
6H
14) metering charge in the circulation loop.
Working principle is:
The deep fat (water) that solar energy deep fat (water) recycle pump is will be from the temperature that plate type heat exchanger is returned lower, send in the solar energy heating heater and heat, deep fat after the heating (water) is piped to heat exchange in plate type heat exchanger and the heat reservoir, be implemented in sunlight intensity and generate electricity simultaneously and heat accumulation in big by electrically-controlled valve is set on deep fat (water) pipeline, the deep fat that comes out from heat collector when solar thermal collector adds shortage of heat passes through the heat again of heat reservoir, delivers to afterwards and removes the heating working medium fluid in the plate type heat exchanger;
The higher deep fat (water) of temperature picks out plate type heat exchanger from the top of heat accumulation oil (water) case, in plate type heat exchanger the cycle fluid in the moving power generation circuit of heat transferred heat, make its carburation by evaporation, the heat kerosene after the cooling (water) is recycled the pump pressurization and sends the solar thermal collector heating back to;
The cycle fluid steam that the plate type heat exchanger heating produces flows into vapor-liquid separator, liquid is separated to get off, again plate type heat exchanger heating vaporization, dry steam imports turbine (or decompressor) expansion acting along main steam pipe, drive generator work generating, low pressure steam after the expansion acting is transported to by exhaust steam pipe and is condensed into liquid in the air cooling condenser, flow into again in the working medium liquid-storage container, sucked by the working medium compression pump again and add the highly pressurised liquid that presses under the evaporating pressure, deliver in the plate type heat exchanger by the deep fat of solar energy (water) heating evaporation by pipeline, finish a circulation.
The invention has the beneficial effects as follows:
(1) 200 ℃ of heats that have with interior deep fat (or water) that directly low-density solar energy produced are converted to high-grade electric energy efficiently.
(2) realized the real zero-emission of clean electric power generation process;
(3) realized the generating of personalized distributing, can be used as sun-drenched outlying mountain area or can't obtain the electric power safeguard system in the area of concentrating electric power.
(4) can realize the storage regulating action of solar heat, more can satisfy the practical application of solar electrical energy generation.
Description of drawings
Fig. 1 is the process flow diagram of technical solution of the present invention.
Embodiment
Embodiment: among Fig. 1, organic turbine (or decompressor) 1, excitation alternator 2, air-cooling type vapour condenser 3, working medium liquid-storage container 4, working medium compression pump 5, plate type heat exchanger 6, vapor-liquid separator 7, admission controlling device 8, urgent decompressor 9, solar energy vacuum tube heat-collection heater 10, deep fat (water) recycle pump 11, solar energy heat-storage jar 12, solar energy deep fat (water) Circulation pipe 13, copper pipe 14, cooling water circulating pump 15, cooling tower 16.
Solar energy deep fat (water) Circulation pipe 13 picks out from the bottom of heat storage can 12, insert the import of recycle pump 11, insert the import of solar heater 10 again, deep fat after the heating (water) is received the top of heat storage can 12 and the entry position of plate type heat exchanger 6 with pipeline, on oil (water) pipeline, electrically-controlled valve V1, V2, V3 are set, can realize utilizing heat storage can 12 to carry out the conversion function of heat accumulation and heating heat kerosene (water).
Middle heat kerosene (water) picks out plate type heat exchanger 6 from the bottom of heat storage can 12, and the cycle fluid in the moving power generation circuit of heat transferred heat, the heat kerosene after the cooling (water) is recycled pump 11 pressurizations and sends the solar thermal collector heating back in plate type heat exchanger.
The cycle fluid steam that plate type heat exchanger 6 heating produce flows into vapor-liquid separator 7, liquid is separated to get off, again plate type heat exchanger 6 heating vaporizations, dry steam imports turbine (or decompressor) 1 expansion acting along main steam pipe, drive generator 2 work generatings, low pressure steam after the expansion acting is transported in the air cooling condenser 3 by exhaust steam pipe and is condensed into liquid, flow into again in the working medium liquid-storage container 4, sucked by working medium compression pump 5 again and add the highly pressurised liquid that presses under the evaporating pressure, deliver in the plate type heat exchanger 6 by the deep fat of solar energy (water) heating evaporation by pipeline, finish a circulation.
Be stored in the catch basin through the water after the cooling of cooling tower 16, insert cooling water circulating pump 15, send into water-cooled condenser, absorbed the heat of condensation hot water afterwards of working medium, deliver to the water distributor inlet of cooling tower 16 again with pipeline by the pump pressurization with pipeline.
A low-temperature solar energy heating power generating model machine is built in Kunming, capacity is 3KW, calculates through heating power, at roofing 870 58U type vacuum tubes (d58x2100) solar energy heating heater (the thermal-arrest intensity of pressing 600-700w/m2 is calculated) is installed, middle heating agent adopts water, and the volume of solar energy heat-storage jar is 3.5m
3, the water-exit temperature of heat collector is 93 ℃, and return water temperature is 83 ℃, and solar heat water-circulating pipe and middle heating agent pipeline adopt the thick foamed rubber-plastic shell insulation of 50mm, adopt plate type heat exchanger between middle heat medium water and power cycle working medium, adopt pentane (C
5H
12) as the working medium of power cycle, the working medium circulation loop adopts copper pipe d12x1, heat exchanger adopts the thick foamed rubber-plastic shell insulation of 50mm adiabatic to the working medium copper pipe between turbine, it is the canned motorpump of 1500kg/h that the working medium compression pump adopts flow, and head pressure is 0.4MPa, adopts water cooled condenser, join a mechanical-draft cooling tower, cooling water circulating pump adopts pipeline mounted pump, adopts special screw expansion motor (3Kw) and excitation generator, and all the other equipment parts connect by figure.
Claims (7)
1, a kind of disperse type low-temperature solar thermal power generation system, it is characterized in that this system comprises: solar energy heat-storage loop, middle heating agent loop, low boiling cycle fluid power cycle loop, chilled(cooling) water return (CWR), the solar energy heat-storage loop is that circular-pump (11) is inserted by solar heat oil circulating pipe (13) and electric control valve (V3) in the bottom of heat storage can (12), receive the import of solar energy heating heater (10) again, the top of heat storage can (12) is received in the outlet of solar energy heating heater (10) by pipeline; Middle heating agent loop be heat storage can (12) connect electrically-controlled valve V1 and V3 up and down respectively, and V1 is in parallel with electrically-controlled valve, solar heater (10) links to each other with the hot oil inlet of plate type heat exchanger (6), the hot oil outlet of plate type heat exchanger (6) is connected to the inlet of recycle pump (11), in plate type heat exchanger (6) the heat transferred cycle fluid, be recycled pump (11) again and deliver to solar heater (10) by pipeline) the oil return interface, heat accumulation is carried out on other one road top of inserting heat storage can (12), again from the outlet of heat storage can (12) by the inlet of V3 to recycle pump (11); Low boiling cycle fluid power cycle loop is that the outlet of turbine (1) steam discharge links to each other with water-cooled condenser (3) by blow-off line, water-cooled condenser (3) outlet is connected to working medium liquid-storage container (4) inlet by pipeline, the inlet of working medium compression pump (5) is received in working medium liquid-storage container (4) outlet, the cold fluid ingress of plate type heat exchanger (6) is received in the outlet of working medium compression pump (5) by pipeline, the cold fluid outlet of plate type heat exchanger (6) inserts the ingress of vapor-liquid separator (7) again by pipeline, the dry saturated vapor outlet of vapor-liquid separator (7) links to each other by the main steam inlet of pipeline with organic turbine (1), and organic turbine (1) drives generator (2) by shaft coupling and gear; The chilled(cooling) water return (CWR) is for being stored in the catch basin through the water after the cooling of cooling tower (16), insert cooling water circulating pump 15 with pipeline, send into water-cooled condenser (3) by the pump pressurization, absorbed the heat of condensation hot water afterwards of working medium, deliver to the water distributor inlet of cooling tower (16) again with pipeline.
2, disperse type low-temperature solar thermal power generation system as claimed in claim 1 is characterized in that: this power generation system power cycle is used the pure working medium of pentane or n-hexane;
3, disperse type low-temperature solar thermal power generation system as claimed in claim 1, it is characterized in that: this power generation system uses normal pressure also to can be≤the low pressure solar thermal collector of 0.6Mpa, can be board-like or electron tubes type, medium in the solar energy heat-storage system can adopt conduction oil or water, and its outlet temperature is more than 60 ℃;
4, disperse type low-temperature solar thermal power generation system as claimed in claim 1 is characterized in that: this power generation system is used for the distributing generating occasion of capacity within 100Kw.
5, disperse type low-temperature solar thermal power generation system as claimed in claim 1 is characterized in that: the vapour condenser of this power generation system adopts the indirect cooling heat extraction mode of water-cooled condenser.
6, disperse type low-temperature solar thermal power generation system as claimed in claim 1 is characterized in that: this power generation system is provided with thermal accumulator, can the heat of solar thermal collector be stored, and thermal accumulator can be transformed into the heat release operating mode again in needs.
7, a kind of disperse type low-temperature solar thermal power electrification technique as well as is characterized in that:
(1) generate output on demand is equipped with solar thermal collector and circulation loop thereof;
(2) circulating load and the pressure-drop in pipeline according to the required working medium of Rankine cycle system requires to install the needed copper pipe of power cycle road;
(3) install and connect equipment, accessories such as organic turbine, plate type heat exchanger, coagulator, liquid-storage container, vapor-liquid separator, working medium compression pump, heat storage can, cooling water circulating pump, cooling tower and valve;
(4), pentane (R601a) or n-hexane metering are charged in the circulation loop according to pipeline volume calculations working medium charging amount.
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| CNA2008100587142A CN101509472A (en) | 2008-07-23 | 2008-07-23 | Disperse type low-temperature solar thermal power generation system and power generation technique |
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| CNA2008100587142A CN101509472A (en) | 2008-07-23 | 2008-07-23 | Disperse type low-temperature solar thermal power generation system and power generation technique |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886884A (en) * | 2010-06-02 | 2010-11-17 | 上海迪吉特控制系统有限公司 | Circulating cooling water solar energy saving and controlling device for coal-based power plant |
| CN101922864A (en) * | 2010-09-26 | 2010-12-22 | 中冶赛迪工程技术股份有限公司 | Waste heat recycling system of distributed pure low temperature coal gas from iron and steel enterprises |
| CN102003887A (en) * | 2010-11-26 | 2011-04-06 | 中冶赛迪工程技术股份有限公司 | Sintering waste heat utilization system |
| CN102518491A (en) * | 2011-11-22 | 2012-06-27 | 中国科学院力学研究所 | Thermal circulating system by utilizing carbon dioxide as circulating working medium |
| CN102996192A (en) * | 2012-12-31 | 2013-03-27 | 西安工业大学 | Efficient internal recycle engine |
| CN103216426A (en) * | 2013-02-22 | 2013-07-24 | 中国科学院理化技术研究所 | Heat-regenerated compressed air energy storage system |
| CN103372371A (en) * | 2013-07-04 | 2013-10-30 | 天津大学 | System device for carbon capture through solar organic Rankine cycle auxiliary coal-fired power generation |
| WO2015043551A1 (en) * | 2013-09-24 | 2015-04-02 | 郭颂玮 | High-efficiency power generation system |
| CN110630457A (en) * | 2019-10-18 | 2019-12-31 | 常波 | Photo-thermal low-temperature power generation system and control method thereof |
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2008
- 2008-07-23 CN CNA2008100587142A patent/CN101509472A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886884A (en) * | 2010-06-02 | 2010-11-17 | 上海迪吉特控制系统有限公司 | Circulating cooling water solar energy saving and controlling device for coal-based power plant |
| CN101922864A (en) * | 2010-09-26 | 2010-12-22 | 中冶赛迪工程技术股份有限公司 | Waste heat recycling system of distributed pure low temperature coal gas from iron and steel enterprises |
| CN102003887A (en) * | 2010-11-26 | 2011-04-06 | 中冶赛迪工程技术股份有限公司 | Sintering waste heat utilization system |
| CN102518491A (en) * | 2011-11-22 | 2012-06-27 | 中国科学院力学研究所 | Thermal circulating system by utilizing carbon dioxide as circulating working medium |
| CN102518491B (en) * | 2011-11-22 | 2015-10-28 | 中国科学院力学研究所 | A kind of carbon dioxide that utilizes is as the circulation system of cycle fluid |
| CN102996192A (en) * | 2012-12-31 | 2013-03-27 | 西安工业大学 | Efficient internal recycle engine |
| CN103216426A (en) * | 2013-02-22 | 2013-07-24 | 中国科学院理化技术研究所 | Heat-regenerated compressed air energy storage system |
| CN103372371A (en) * | 2013-07-04 | 2013-10-30 | 天津大学 | System device for carbon capture through solar organic Rankine cycle auxiliary coal-fired power generation |
| CN103372371B (en) * | 2013-07-04 | 2015-07-08 | 天津大学 | System device for carbon capture through solar organic Rankine cycle auxiliary coal-fired power generation |
| WO2015043551A1 (en) * | 2013-09-24 | 2015-04-02 | 郭颂玮 | High-efficiency power generation system |
| US9797274B2 (en) | 2013-09-24 | 2017-10-24 | Songwei GUO | High-efficiency power generation system |
| CN110630457A (en) * | 2019-10-18 | 2019-12-31 | 常波 | Photo-thermal low-temperature power generation system and control method thereof |
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