CN103470460B - Face, pond evaporation type solar heat power generation system - Google Patents
Face, pond evaporation type solar heat power generation system Download PDFInfo
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- CN103470460B CN103470460B CN201310374808.1A CN201310374808A CN103470460B CN 103470460 B CN103470460 B CN 103470460B CN 201310374808 A CN201310374808 A CN 201310374808A CN 103470460 B CN103470460 B CN 103470460B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The invention discloses face, a kind of pond evaporation type solar heat power generation system, it comprises evaporation tank, printing opacity ceiling, mirror array, Turbo-generator Set, direct-contact type condenser, mixed solution pipeline, solution pump, cooling water pipeline, cooling waterpump, cooling tower, air-cooler.In the present invention, the liquid of evaporation tank is made up of low boiling working fluid layer and fresh water aquifer, sunlight is by direct projection and reflect Radiation transport to low boiling working fluid layer, gained high pressure steam drives Turbo-generator Set acting generating, the cooling water of drawing at the bottom of evaporation tank after cooling tower heat release, enter direct-contact type condenser contact and condensation steam discharge forms mixed solution, be transmitted back in evaporation tank by solution pump again, low boiling working fluid and fresh water do not dissolve each other and AUTOMATIC ZONING due to density difference.Present system simple structure, thermal efficiency are high, energy conversion efficiency is high, cycle efficiency is high, station capacity is large, construction cost is low, are applicable to low cost mass production, can be widely used in solar energy thermal-power-generating technical field.
Description
Technical field
The invention belongs to solar energy thermal-power-generating technical field, particularly relate to face, a kind of pond evaporation type solar heat power generation system.
Background technique
When our times various countries face the energy day by day in short supply, people using solar energy as one of the modern times main new energy developed.Therefore, ask for this inexhaustible energy treasure-house of the sun energy revolution that energy realizes in human history, become the main trend of energy development from now on, wherein solar electrical energy generation should be to provide the main force of following extensive electric power.Current China solar photovoltaic industry starts to rise, and the investigation and application of solar energy thermal-power-generating still locates the state that relatively falls behind, and the great potential that the scale feature of solar energy thermal-power-generating determines its future development is greater than solar photovoltaic industry.Solar heat power generation system is divided into tower, slot type, dish-style, solar pond and solar chimney hot airflow power generation five type at present, and first three is planted solar heat power generation system and belongs to light-focusing type, and latter two belongs to non-concentrating type.The overall efficiency of light-focusing type heat generating system is higher, but system construction is complicated, and cost of production is expensive, and except slot type power station enters except commercialization stage, all the other two kinds still in research and experimental stage; Solar pond power generation system simple structure, construction cost is low, cost of electricity-generating is low, it is the most cheap a kind of technology with being convenient to promote in current all Application of Solar Energy, but still come with some shortcomings part: one, in pond, salt gradient is easily destroyed, need periodically to supplement a large amount of salinities, add operating cost and cost of electricity-generating, two is that vaporizer in power generating equipment and condenser all exist heat exchange difference, causes generating efficiency to decrease; Solar chimney thermal current power generation system is then conducive to improving and rebuilding ecotope, but efficiency is very low.
Summary of the invention
The object of the present invention is to provide face, the pond evaporation type solar heat power generation system that a kind of simple structure, system effectiveness are high, construction cost is low, cost of electricity-generating is low.
For achieving the above object, technical solution of the present invention is:
The present invention is face, a kind of pond evaporation type solar heat power generation system, and it comprises evaporation tank, printing opacity ceiling, mirror array, Turbo-generator Set, direct-contact type condenser, mixed solution pipeline, solution pump, cooling water pipeline, cooling waterpump, cooling tower, air-cooler.
Described evaporation tank is add the natural fresh water lake of low boiling working fluid or artificial swimmer's pool, and in evaporation tank, liquid is divided into two-layer up and down, and upper strata has certain thickness low boiling working fluid layer, and lower floor is fresh water aquifer; Described printing opacity ceiling is made up of the transparent material such as glass or film, and printing opacity ceiling covers the top of evaporation tank completely and forms confined space with the face, pond of evaporation tank, and steam (vapor) outlet is offered in the central position of printing opacity ceiling; Described mirror array is arranged in the face, pond that massif around evaporation tank or the architectural and reflected light of reflecting mirror can be irradiated to evaporation tank; The steam inlet of described Turbo-generator Set is connected with the steam (vapor) outlet of printing opacity ceiling, and the exhaust vent of Turbo-generator Set is connected with the steam inlet of direct-contact type condenser; The condensation water outlet of described direct-contact type condenser is communicated with evaporation tank by mixed solution pipeline, and the outlet of mixed solution pipeline is arranged on the top position of evaporation tank fresh water aquifer, and mixed solution pipeline is equipped with solution pump; The import of described cooling water pipeline is communicated with bottom evaporation tank, and the outlet of cooling water pipeline is connected with the influent side of the air-cooler be arranged on cooling tower wall, and cooling water pipeline is equipped with cooling waterpump; The water outlet side of described air-cooler is connected with the nozzle of direct-contact type condenser by pipeline.
The degree of depth of described evaporation tank is between 20 ~ 200m, and the thickness of low boiling working fluid layer is between 0.3 ~ 2m, and the low boiling organic working medium that working medium is selected and is insoluble to or is insoluble in water, density is less than water selects low boiling organic working medium normal hexane in example of the present invention.
After adopting such scheme, the working procedure that solar energy is converted to electric energy by the present invention is as follows: the first step, sunlight is by direct projection and reflect Radiation transport to the low boiling working fluid liquid in evaporation tank, low boiling working fluid liquid obtains heat energy and becomes high pressure steam, and high pressure steam drives Turbo-generator Set acting generating; Second step, the direct condensation by contact of cooling water that steam discharge and the cooling tower of steam turbine are sent here becomes mixed solution, and mixed solution is sent back to evaporation tank, and low boiling working fluid liquid is separated formation layering with water automatically because density difference does not dissolve each other.In summary it can be seen, whole working procedure design possesses science and parsimony.
The present invention in collection of energy, change and utilize in process there is following following features: one, the present invention utilizes evaporation tank to complete the transfer process of solar energy directly to heat energy needed for low boiling working fluid steam, this conversion process of energy is very simple efficient, now evaporation tank is equivalent to the integrated equipment of a huge heat collector and a huge vaporizer, the face, pond of evaporation tank is the absorption surface of sunlight, is again heating surface and the evaporating surface of low boiling working fluid.Because the area of evaporation tank is very large, be easy to absorb a large amount of sunlights, therefore Heat-collecting effect is fine, simultaneously, the whole area of evaporation tank is as the heating surface of low boiling working fluid and evaporating surface, have the advantages that heat output is large, evaporation rate is fast, steam output is large, the scale in power station easily realizes maximizing.In addition, present invention saves heat collector and the metal consumptive material required for vaporizer in conventional system, construction cost significantly reduces.Two, in the present invention, the cold junction in power station adopts the mixing condenser without heat exchange difference, and its heat-economy is better than the surface condenser that conventional system uses, and improves the efficiency in power station.
The present invention compares with solar pond power generation system, first solar pond power generation system uses the salt solution at the bottom of solar energy heating solar pond, steam is obtained by vaporizer heating low boiling working fluid again with the hot water that pump extracts at the bottom of pond, this process must cause energy loss because vaporizer has heat exchange difference, consumes certain pump merit simultaneously; And the present invention utilizes evaporation tank to complete the transfer process of solar energy directly to heat energy needed for low boiling working fluid steam, do not need huge vaporizer, conversion process of energy is more simple, and energy conversion efficiency improves, and construction cost reduces.The cold junction of solar pond power generation system adopts surface condenser, and metal consumptive material is large, and heat-economy is poor, and in the present invention, the cold junction in power station adopts mixing condenser, and metal consumptive material is few, and heat-economy is high, and the efficiency in power station is improved.Therefore, under the condition having sunshine, efficiency of thermal cycle of the present invention is by the efficiency higher than solar pond power generation system, but under condition without sunshine, the present invention does not possess the heat accumulation function of solar pond power generation system, must arrange heat-stored device in addition.
In sum, advantage of the present invention is: system construction is simple, thermal efficiency is high, energy conversion efficiency is high, efficiency of thermal cycle is high, station capacity is large, construction cost is low.Therefore the present invention is a kind of technology being dirt cheap in Application of Solar Energy and being convenient to promote, and is applicable to low cost mass production, can be widely used in solar energy thermal-power-generating technical field.
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention is face, a kind of pond evaporation type solar heat power generation system, and it comprises evaporation tank 1, printing opacity ceiling 2, mirror array 3, Turbo-generator Set 4, direct-contact type condenser 5, mixed solution pipeline 6, solution pump 7, cooling water pipeline 8, cooling waterpump 9, cooling tower 10, air-cooler 11.
Described evaporation tank 1 is add the natural fresh water lake of low boiling working fluid or artificial swimmer's pool, and its degree of depth is between 20 ~ 200m; In evaporation tank 1, liquid is divided into two-layer up and down, and upper strata has certain thickness low boiling working fluid layer S1, and lower floor is fresh water aquifer S2.The thickness of described low boiling working fluid layer S1 is between 0.3 ~ 2m, the low boiling organic working medium that working medium is selected and is insoluble to or is insoluble in water, density is less than water, and in the present embodiment, low boiling working fluid is normal hexane.
Described printing opacity ceiling 2 is made up of the transparent material such as glass or film, and printing opacity ceiling 2 covers the top of evaporation tank 1 completely and forms confined space with the face, pond of evaporation tank 1, and steam (vapor) outlet is offered in the central position of printing opacity ceiling 2; The massif of described reflecting mirror 3 arranged in arrays around evaporation tank 1 or the architectural and reflected light of reflecting mirror 3 can be irradiated to the face, pond of evaporation tank 1; The steam inlet of described Turbo-generator Set 4 is connected with the steam (vapor) outlet of printing opacity ceiling 2, and the exhaust vent of Turbo-generator Set 4 is connected with the steam inlet of direct-contact type condenser 5; The condensation water outlet of described direct-contact type condenser 5 is communicated with evaporation tank 1 by mixed solution pipeline 6, and the outlet of mixed solution pipeline 6 is arranged on the top position of evaporation tank 1 fresh water aquifer, and mixed solution pipeline 6 is equipped with solution pump 7; The import of described cooling water pipeline 8 is communicated with bottom evaporation tank 1, and the outlet of cooling water pipeline 8 is connected with the influent side of the air-cooler 11 be arranged on cooling tower 10 wall, cooling water pipeline 8 is equipped with cooling waterpump 9; The water outlet side of described air-cooler 11 is connected by the nozzle of pipeline with direct-contact type condenser 5.
Working principle of the present invention:
As shown in Figure 1, sunlight direct projection and arrived the face, pond of evaporation tank 1 by mirror array 3 reflectance-transmittance printing opacity ceiling 2, the solar energy of the overwhelming majority is uniformly distributed in the low boiling working fluid layer S1 that face, evaporation tank 1 pond is made up of normal hexane working medium and absorbs, in example of the present invention, low boiling working fluid selects normal hexane, fraction solar energy due to the transmission of sunlight absorb by the water body near below low boiling working fluid layer S1.After the heat absorption of normal hexane working medium, temperature sharply increases, there is evaporation process and form normal hexane high pressure steam in surface, the now latent heat of vaporization adding heat and steam being converted into self compared with great share of normal hexane working medium institute radiation-absorbing heat, less share passes to the water body near below low boiling working fluid layer S1 by heat radiation.Because the heat of low boiling working fluid layer S1 passes to water body neighbouring below it by heat-conducting mode, continued to the water body transferring heat at the bottom of pond by heat-conducting mode by this water body again, make the temperature of whole evaporation tank 1 along with the dark production decline law in gradient in pond, the temperature of supernatant liquid (low boiling working fluid layer S1) is always higher than the temperature of lower floor's liquid (fresh water aquifer S2), effectively prevent the natural convection phenomenon of the vertical direction that lower floor's pond water may produce because temperature is higher, therefore in evaporation tank 1, each layer fluid temperature keeps constant substantially, the temperature of water body at the bottom of pond is minimum and maintenance is substantially constant.Normal hexane high pressure steam is done work by steam turbine 4 and generates electricity, steam discharge enters mixing condenser 5, and cooling water comes from the cold water at the bottom of pond, cold water at the bottom of pond first forms the cooling water of about 25 DEG C after cooling tower 10 heat release, enter mixing condenser 5 fully contact also condensation steam discharge formation mixed solution again, mixed solution is transported in evaporation tank 1 by solution pump 7, normal hexane working medium with water because density difference is separated automatically, normal hexane working medium upwards flows into low boiling working fluid layer S1, water flows into fresh water aquifer S2, thus completes a thermodynamic cycle.In example of the present invention, the Stress control of evaporation tank 1 is between 0.1 ~ 2.6Mpa, and to maintain evaporating temperature between 70 ~ 224 DEG C, the Stress control of direct-contact type condenser 5 is at below 0.03Mpa, to maintain condensing temperature lower than 35 DEG C, show that theoretical maximum cycle efficiency can reach 51.7% as calculated.
The above, be only present pre-ferred embodiments, the layout of each equipment and pipeline can have various ways, therefore scope of the invention process can not be limited with this, namely the equivalence done according to the present patent application the scope of the claims and description changes and modifies, and all should still remain within the scope of the patent.
Claims (2)
1. face, a pond evaporation type solar heat power generation system, is characterized in that: it comprises evaporation tank, printing opacity ceiling, mirror array, Turbo-generator Set, direct-contact type condenser, mixed solution pipeline, solution pump, cooling water pipeline, cooling waterpump, cooling tower, air-cooler; Described evaporation tank is add the natural fresh water lake of low boiling working fluid or artificial swimmer's pool, and in evaporation tank, liquid is divided into two-layer up and down, and upper strata has certain thickness low boiling working fluid layer, and lower floor is fresh water aquifer; Described printing opacity ceiling is made up of glass or thin-film transparent material, and printing opacity ceiling covers the top of evaporation tank completely and forms confined space with the face, pond of evaporation tank, and steam (vapor) outlet is offered in the central position of printing opacity ceiling; Described mirror array is arranged in the face, pond that massif around evaporation tank or the architectural and reflected light of reflecting mirror can be irradiated to evaporation tank; The steam inlet of described Turbo-generator Set is connected with the steam (vapor) outlet of printing opacity ceiling, and the exhaust vent of Turbo-generator Set is connected with the steam inlet of direct-contact type condenser; The condensation water outlet of described direct-contact type condenser is communicated with evaporation tank by mixed solution pipeline, and the outlet of mixed solution pipeline is arranged on the top position of evaporation tank fresh water aquifer, and mixed solution pipeline is equipped with solution pump; The import of described cooling water pipeline is communicated with bottom evaporation tank, and the outlet of cooling water pipeline is connected with the influent side of the air-cooler be arranged on cooling tower wall, and cooling water pipeline is equipped with cooling waterpump; The water outlet side of described air-cooler is connected with the nozzle of direct-contact type condenser by pipeline.
2. face, pond according to claim 1 evaporation type solar heat power generation system, it is characterized in that: the degree of depth of described evaporation tank is between 20 ~ 200m, the thickness of low boiling working fluid layer is between 0.3 ~ 2m, the low boiling organic working medium that working medium is selected and is insoluble to or is insoluble in water, density is less than water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310374808.1A CN103470460B (en) | 2013-08-26 | 2013-08-26 | Face, pond evaporation type solar heat power generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310374808.1A CN103470460B (en) | 2013-08-26 | 2013-08-26 | Face, pond evaporation type solar heat power generation system |
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| CN103470460A CN103470460A (en) | 2013-12-25 |
| CN103470460B true CN103470460B (en) | 2015-12-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104265389B (en) * | 2014-10-22 | 2016-03-02 | 烟台荏原空调设备有限公司 | A kind of double-work medium cycle generating system with direct contact type condenser |
| CN107420276A (en) * | 2017-09-07 | 2017-12-01 | 合肥普赛机械自动化有限公司 | A kind of solar-thermal generating system |
| CN110513167B (en) * | 2019-08-27 | 2022-05-13 | 中国科学院广州能源研究所 | Heat and mass mixed multistage power generation system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4046639A (en) * | 1976-11-22 | 1977-09-06 | Uop Inc. | Power generation and potable water recovery from salinous water |
| US4283913A (en) * | 1978-12-12 | 1981-08-18 | Intertechnology/Solar Corporation | Utilization of saturated solar ponds |
| JPS60166765A (en) * | 1984-02-10 | 1985-08-30 | Hitachi Zosen Corp | Generating device |
| JP2000110515A (en) * | 1998-10-05 | 2000-04-18 | Takeshi Hatanaka | Solar heat power generation system |
| CN101737282B (en) * | 2008-11-05 | 2012-05-23 | 上海海事大学 | High-efficiency hybrid ocean temperature difference power generating system |
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