CN203476624U - Low-temperature organic Rankine cycle solar heat power generation system - Google Patents

Low-temperature organic Rankine cycle solar heat power generation system Download PDF

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Publication number
CN203476624U
CN203476624U CN201320429000.4U CN201320429000U CN203476624U CN 203476624 U CN203476624 U CN 203476624U CN 201320429000 U CN201320429000 U CN 201320429000U CN 203476624 U CN203476624 U CN 203476624U
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heat
low
power generation
working medium
organic rankine
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CN201320429000.4U
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孟宁
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NANJING MEISHENG NEW ENERGY SCIENCE & TECHNOLOGY Co Ltd
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NANJING MEISHENG NEW ENERGY SCIENCE & TECHNOLOGY Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/46Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Abstract

The utility model provides a low-temperature organic Rankine cycle solar heat power generation system which consists of a heat conduction working medium loop, a cooling loop and an organic working medium loop, wherein the heat conduction working medium loop comprises a fuel complementary boiler and a heat accumulator, a heat conduction working medium pump, a heat concentrator and an evaporator which are sequentially connected with one another to form a ring; two ends of the fuel complementary boiler are respectively connected with two ends of the heat concentrator; the cooling loop comprises a cooling tower, a water pump and a condenser which are sequentially connected with one another to form a ring; an organic Rankine cycle working medium loop comprises a working medium tank, a working medium pump, an evaporator, a heat-work conversion device and a condenser which are sequentially connected with one another to form a ring. The low-temperature organic Rankine cycle solar heat power generation system is simple in structure, convenient to use and low in cost; according to the characteristic of low-temperature heat power generation, an optimal low-boiling-point working medium is selected from multiple organic matters; power generation is realized through low-temperature working mediums under the action of low-temperature heat; the power generation efficiency is high, and the cost is low. The temperature of low-temperature heat power generation of the system is about 100 DEG C, and the efficiency of the low-temperature heat power generation is close to that of solar heat high-temperature power generation.

Description

A kind of low form organic Rankine circulation solar thermal power generation system
Technical field
The utility model belongs to solar energy generation technology field, is specifically related to a kind of low form organic Rankine circulation solar thermal power generation system.
Background technique
Use at present the technology of solar electrical energy generation can be divided into two classes, a class is photovoltaic power generation technology, and another kind of is photothermal power generation technology.The former utilizes photoelectric effect directly the part spectrum in sunlight to be converted to electric power.The latter is converted to mechanical motion by steam turbine by the heat of high temperature producing after solar light focusing, then produces electric energy by generator.Physical principle, photovoltaic technology is more direct, also just guides people first to pay close attention to this path.But in practice is for many years attempted, owing to limited by the fundamental property of occurring in nature material, cannot realize high efficiency and conversion cheaply always, in manufacturing technology, exist high energy consumption and high pollution to make photovoltaic technology difficult in large-scale promotion simultaneously.More severe problem is, the electric power that photovoltaic cell produces is subject to weather with impact round the clock and very unstable, is unfavorable for that electrical network receives conveying.Although can stabilize these fluctuations by electric power storage or other forms of accumulation of energy principle, all because high cost cannot be used on a large scale, therefore people recognize that photovoltaic technology is difficult to become main force's technology of following solar electrical energy generation gradually.
In order to find, be suitable for the desired solar energy generation technology of large-scale electrical production, people have expected again the steam turbine that thermal power generating technology adopts.Solar light focusing is produced to high temperature, and then produce high temperature and high pressure steam by boiler (steam generator), the burning boiler or the nuclear reactor that replace thermal power generation, become the principal mode of the focusing solar power generation (CSP, Concentrating Solar Power) that has started to enter business application today.Solar energy thermal-power-generating transfers to and starting to walk and the fast-developing phase since the budding period.Through the lasting research of some developed countries such as the U.S. and Europe, developed the solar energy high temperature heat generating system of various ways at present, single-machine capacity develops into MW class from multikilowatt.Press the difference of heat collector type, concentration type solar power generation system can be divided into slot type system, tower system and dish formula system.But, at the solar heat power generation system of operation, generally adopt at present water vapour Rankine cycle (SRC) mode of traditional thermoelectricity plant, the thermophysical property of water vapour, requires heat source temperature generally will reach 400 ℃ when above, and steam turbine just can reach 15% generating efficiency.And for solar heat power generation system, obtain such high temperature heat source, heat-collecting devcie must adopt large size, high ratio, the complicated focusing heat collection mode of following the tracks of the sun of focusing on, cause the control of whole system loaded down with trivial details, in large scale, installation and operation management, maintenance be complicated, the high and generating efficiency of cost only has 15% left and right (because thermal-arrest loss is 50%).Therefore cause the manufacture of solar heat high-temperature power generation system and operating cost far above the thermal power generation of coal, and fail so far to realize large-scale industrialization.The inertia that the at present tower steam turbine generally adopting with slot type CSP system is traditional thermal power generating technology extends.Because this steam turbine only could obtain lower cost and higher efficiency when high-power (tens of even hundreds of megawatts), so several square kilometres to tens of square kilometres often of corresponding groove type heat collector areas of steam turbine.Need accurate heliostat sunlight to be projected to the heat absorption head (tower) of tower top outside several kilometers, needing the long heat absorption tube of tens of kilometers and heat transfer pipe to transmit heat energy (slot type), all there is the problems such as hot transmission loss is large, equipment manufacturing cost is high in this in practice.Meanwhile, these power generation systems need comparatively smooth soils, and need certain water source, this all be desirably in desert zone and utilize on a large scale the actual conditions of solar energy to contradict.
Model utility content
Model utility object: the purpose of this utility model is to overcome above-mentioned tower and slot type CSP system and the above-mentioned shortcoming of Stirling engine and the deficiency of technology, and a kind of low form organic Rankine circulation solar thermal power generation system is provided.
Technological scheme: a kind of low form organic Rankine circulation solar thermal power generation system that the utility model provides, is comprised of heat-conducting work medium loop, cooling circuit and organic working medium loop; Described heat-conducting work medium loop comprises the complementary boiler of fuel and the thermal accumulator, heat-conducting work medium pump, heat collector () and the vaporizer that are in turn connected into ring, and the two ends of the complementary boiler of described fuel are connected with the two ends of heat collector () respectively; Described cooling circuit comprises cooling tower, water pump and the condenser that is in turn connected into ring; The organic working medium loop of described organic Rankine circulation comprises working medium tank, working medium pump, vaporizer, hot merit conversion equipment, the condenser that is in turn connected into ring.
As preferably, in described heat-conducting work medium loop, adopt conduction oil, ethylene glycol or water as heat-conducting work medium.
Preferred as another kind, described thermal accumulator is the container of splendid attire heat-conducting work medium or with the phase transformation heat vessel of heat exchange pipeline, thermal insulating material parcel insulation for thermal accumulator outside.
Preferred as another kind, described heat collector () is flat type solar heat collector, electron tubes type solar thermal collector or hot pipe type solar heat collector.
Preferred as another kind, described electron tubes type solar thermal collector is U-shaped tube type vacuum pipe heat collector, heat pipe vacuum tube hot collector or direct current type vacuum tube collector.
Preferred as another kind, described heat collector is comprised of the heat collecting pipe of one group of series connection.Series connection heat collecting pipe can obtain higher heat-collecting temperature and efficiency, and realizes the large size thermal-arrest that meets thermal-arrest requirement.
Preferred as another kind, the evaporating temperature of described vaporizer is between 30 ℃-100 ℃.
Preferred as another kind, the complementary boiler of described fuel adopts rock gas, coal gas, liquefied petroleum gas, biogas or stalk as biomass fuel.
Preferred as another kind, described cooling circuit is water cooling labyrinth or air-cooled loop.
Preferred as another kind, the organic working medium adopting in described organic working medium loop is 80 ℃ of critical temperatures are following, boiling point circulates at applicable low form organic Rankine any-40 ℃ below single working medium, mixed working fluid, across critical working medium as cycle fluid.Preferably, adopt propane (C 3h 8) or carbon dioxide (CO 2) or the mixture of propane and carbon dioxide as working medium.Adopt such working medium to have advantages of not damage the ozone layer, chemical stabilization, meanwhile, its setting temperature of such working medium is less than the minimum setting temperature of the working medium in all loops in systemic circulation.
Preferred as another kind, described hot merit conversion equipment is steam turbine or decompressor, and wherein, described decompressor includes but not limited to scroll expansion machine, screw type decompressor, centrifugal decompressor and piston expansion engine.
Beneficial effect: the solar energy ORC (organic Rankine cycle) low-temperature power generation system structure that the utility model provides is simple, easy to use, with low cost, feature for low-temperature heat power generation, from numerous organic substance, select best low boiling working fluid, utilize Low Temperature Thermal to realize generating by cryogenic fluid, generating efficiency is high, cost is low.The temperature of the low-temperature heat power generation of this system is 100 ℃ of left and right, and the efficiency of its efficiency and the generating of solar heat high temperature is close.
Particularly, solar energy ORC (organic Rankine cycle) low-temperature power generation system of the present utility model has advantages of following outstanding with respect to prior art:
(1) the utility model carries out perfect combination by ripe solar water heater heat-collecting technology and working medium low-temperature electricity-generating technology, to realize high efficiency and novel solar heat energy low-temperature electricity-generating cheaply, low-density solar energy can be produced 100 ℃ and lower heat Efficient Conversion are high-grade electric energy, and generating temperature is low, efficiency is high.
(2) this system is used working medium safety, environmental protection, harmless, overall process has realized clean electric power generation, and due to the working medium safety and environmental protection adopting, so this system is corrosion-resistant, and the life-span is long.
(3) the general R245fa that adopts of working medium power generation system in the past generating is as cycle fluid, and its boiling point is 15.1 ℃, and critical temperature is 154 ℃, and in the time of 100 ℃, cycle efficiency is 11.9%; The utility model has replaced traditional water vapour Rankine cycle with organic Rankine circulation, the working medium adopting due to adopted boiling point below-40 ℃, critical temperature is in the working medium below 80 ℃, it has adopted the characteristic of low boiling working fluid, even can obtain higher vapor tension under cryogenic conditions, pushing turbine or decompressor are done manual work; Can under supercritical pressure and supercritical temperature, obtain higher cycle efficiency, in the time of 100 ℃, cycle efficiency is 17%, is suitable for the workmanship generating of low-temperature heat source.
(4) this system is without precious materials, and solar thermal collector and steam turbine all adopt conventional mechanical fabrication process, low cost of manufacture, and price is compared low with similar power generation system.
(5) this system is also carried out accumulation of energy by introducing thermal accumulator, thereby can within 24 hours, generate electricity, and meets round-the-clock power generation needs.
(6) this systematic environment strong adaptability, does not need smooth soil, can utilize hillside, roof and wasteland, and this system can flexible combination simultaneously, both can set up big-and-middle-sized scale power station, also can set up the home-use small-scale using electricity system of distributing, flexible and convenient to use.This device is without optically focused and follow the tracks of the sun, only need to use common flat-plate solar heat collector, glass vacuum pipe heat collector, U-shaped tube type vacuum pipe heat collector, heat pipe vacuum tube hot collector and direct current type vacuum tube collector to be transformed and can generate electricity.
(7) the general lack of water in sun-drenched place, native system does not need water cooling, can adopt the mode condensation of air cooling.
(8), except solar energy, the utility model can utilize various thermals source to generate electricity, comprise the Soil Thermal on geothermal energy resources, industrial exhaust heat, earth's surface, thermal source of the heat in river, seawater surface material, power plant's condensation waste heat etc. as thermal source.
(9) the utility model applied range, can be for 1 kilowatt of generating of the power station to 1000 megawatts, also can be used for business power plant and residential building, can be used for house, office building, production facility, apartment, school, hospital, telecommunication, remote-measuring equipment, offshore platform, pump station, seawater desalination system, decontamination system, field camping, general headquarters' facility, tele-medicine facility, refrigeration system field and farm, remote village, weather station, air-conditioning system etc.
Accompanying drawing explanation
Fig. 1 is low form organic Rankine circulation solar heat low-temperature generating system structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model solar energy ORC (organic Rankine cycle) low-temperature power generation system is made and being further illustrated.
Low form organic Rankine circulation solar thermal power generation system, is shown in Fig. 1, heat-conducting work medium loop 1, cooling circuit 2 and organic working medium loop 3, consists of; Heat-conducting work medium loop 1 comprises the complementary boiler 15 of fuel and the thermal accumulator 11, heat-conducting work medium pump 12, heat collector 13 and the vaporizer 14 that are in turn connected into ring, and the two ends of the complementary boiler 15 of fuel are connected with the two ends of heat collector 13 respectively; Cooling circuit 2 comprises cooling tower 22, water pump 21 and the condenser 34 that is in turn connected into ring; The organic working medium loop 3 of organic Rankine circulation comprises working medium tank 31, working medium pump 32, vaporizer 14, hot merit conversion equipment 33, the condenser 34 that is in turn connected into ring.Between heat-conducting work medium pump 12 and heat collector 13, be provided with the first valve 16, between heat collector 13 and vaporizer 14, be provided with the second valve 17, on the two ends pipeline that the complementary boiler 15 of fuel is connected with heat collector 13, be respectively equipped with the 3rd valve 18 and the 4th valve 19.
In the utility model, thermal accumulator 11 is the container of splendid attire heat-conducting work medium, and alternatively, it can be also the phase transformation heat vessel with heat exchange pipeline, and its outside thermal insulating material parcel that adopts is incubated.
In the utility model, heat collector 13 is U-shaped tube type vacuum pipe heat collector, in heat collecting pipe, do not walk heat-conducting work medium, utilize the U-shaped pipe of U-shaped tube type vacuum pipe heat collector directly heat-conducting work medium to be heated, the U-shaped pipe of vacuum tube is connected mutually, carry out step heating, running temperature is high, very easily reach the desired temperature of low-temperature electricity-generating more than 150 ℃, also has the performance advantages such as the strong and thermal shock resistance of bearing capacity is good simultaneously.Alternatively, heat collector can be also flat type solar heat collector, electron tubes type solar thermal collector or hot pipe type solar heat collector, or heat pipe vacuum tube hot collector or direct current type vacuum tube collector.
In the utility model, the evaporating temperature of vaporizer 14 is controlled at the low-temperature region between 30 ℃-100 ℃ by the Choice and design of working medium; The complementary boiler 15 of fuel adopts rock gas, coal gas, liquefied petroleum gas, biogas or stalk as biomass fuel.
In the utility model, hot merit conversion equipment 33 is steam turbine, alternatively, also can adopt other can realize the device of hot merit conversion, as decompressor, can be scroll expansion machine, screw type decompressor, centrifugal decompressor or piston expansion engine etc.
Wherein, the interior employing conduction oil in heat-conducting work medium loop 1, ethylene glycol or water are as heat-conducting work medium; Cooling circuit 2 is water cooling labyrinth, in the area that lacks water source, also can select air-cooled loop; Propane (C is selected in organic working medium loop 3 3h 8) or carbon dioxide (CO 2) or the mixture of propane and carbon dioxide as working medium, alternatively, the organic working medium of organic working medium loop 3 interior employings includes but not limited to 80 ℃ of critical temperatures are following, boiling point circulates at applicable low form organic Rankine any-40 ℃ below single working medium, mixed working fluid, across critical working medium, as cycle fluid, all can realize the purpose of this utility model.
Its working principle is:
Heat-conducting work medium pump 12 in heat-conducting work medium loop 1 is delivered to heat collector 13 by the heat-conducting work medium of 11 li, thermal accumulator, heat collector 13 absorbs solar thermal energy by heat-conducting oil heating, heat-conducting work medium after heating enters vaporizer 14 by the road, in vaporizer 14, transfer heat to the low boiling working fluid in organic working medium loop 3, then flow back to thermal accumulator 11 through pipeline.When if solar energy or thermal accumulator cannot provide enough heat, the complementary boiler 15 of starting fluid, with additional heat, can generate electricity with biomass fuels such as rock gas, coal gas, liquefied petroleum gas, biogas, stalks, to meet the power demands of 24 hours.Thermal accumulator 11 can also store the heat in heat-conducting work medium loop 1, and in needs, thermal accumulator 11 can be transformed into heat release operating mode again.
Working medium pump 32 in organic working medium loop 3 is sent the working medium in working medium tank 31 into vaporizer 14, working medium is vaporizated into after saturated vapour at the interior heat that has absorbed the heat-conducting work medium in heat-conducting work medium loop 1 of vaporizer 14, through pipeline, enter the blowhole of hot merit conversion equipment 33, in hot merit conversion equipment 33, the acceleration of expanding rapidly of the saturated vapour of working medium, drive hot merit conversion equipment 33 vane rotaries, complete hot merit conversion, the impeller of hot merit conversion equipment 33 is connected with the rotor of generator 35 by rotating shaft, therefore drive generator 35 rotations simultaneously, realize electric energy output, complete the conversion of mechanical energy and electric energy, working substance steam after acting enters condenser 34 through pipeline, in condenser 34, completes exchange heat, and cooled working medium flows back to working medium tank 31 by the road.
Water pump 21 in cooling circuit 2 is sent the water of 22 li of cooling towers to condenser 34 via pipeline, absorbs the heat of the working medium in organic working medium loop 3 and make working medium cooling in condenser 34, and the hot water that obtains heat flows back to cooling tower 22 through pipeline.

Claims (10)

1. a low form organic Rankine circulation solar thermal power generation system, is characterized in that: heat-conducting work medium loop (1), cooling circuit (2) and organic working medium loop (3), consist of; Described heat-conducting work medium loop (1) comprises the complementary boiler (15) of fuel and the thermal accumulator (11), heat-conducting work medium pump (12), heat collector (13) and the vaporizer (14) that are in turn connected into ring, and the two ends of the complementary boiler of described fuel (15) are connected with the two ends of heat collector (13) respectively; Described cooling circuit (2) comprises cooling tower (22), water pump (21) and the condenser (34) that is in turn connected into ring; The organic working medium loop (3) of described organic Rankine circulation comprises working medium tank (31), working medium pump (32), vaporizer (14), hot merit conversion equipment (33), the condenser (34) that is in turn connected into ring.
2. a kind of low form organic Rankine circulation solar thermal power generation system according to claim 1, is characterized in that: in described heat-conducting work medium loop (1), adopt conduction oil, ethylene glycol or water as heat-conducting work medium.
3. a kind of low form organic Rankine circulation solar thermal power generation system according to claim 1, is characterized in that: described heat collector (13) is flat type solar heat collector, electron tubes type solar thermal collector or hot pipe type solar heat collector.
4. a kind of low form organic Rankine circulation solar thermal power generation system according to claim 3, is characterized in that: described electron tubes type solar thermal collector is U-shaped tube type vacuum pipe heat collector, heat pipe vacuum tube hot collector or direct current type vacuum tube collector.
5. a kind of low form organic Rankine circulation solar thermal power generation system according to claim 1, is characterized in that: described heat collector (13) is comprised of the heat collecting pipe of one group of series connection.
6. a kind of low form organic Rankine cycle industrial afterheat generating system according to claim 1, is characterized in that: the evaporating temperature of described vaporizer (14) is between 30 ℃-100 ℃.
7. a kind of low form organic Rankine circulation solar thermal power generation system according to claim 1, is characterized in that: the described complementary boiler of fuel (15) adopts rock gas, coal gas, liquefied petroleum gas, biogas or stalk as biomass fuel.
8. a kind of low form organic Rankine circulation solar thermal power generation system according to claim 1, is characterized in that: described cooling circuit (2) is water cooling labyrinth or air-cooled loop.
9. a kind of low form organic Rankine circulation solar thermal power generation system according to claim 1, is characterized in that: the organic working medium adopting in described organic working medium loop (3) is that 80 ℃ of critical temperatures are following, boiling point at the medium below-40 ℃ as working medium.
10. a kind of low form organic Rankine circulation solar thermal power generation system according to claim 1, is characterized in that: described hot merit conversion equipment (33) is steam turbine or decompressor.
CN201320429000.4U 2013-07-17 2013-07-17 Low-temperature organic Rankine cycle solar heat power generation system Expired - Fee Related CN203476624U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104296397A (en) * 2014-09-25 2015-01-21 陈九法 Device capable of utilizing heat of disk-type solar thermal collector in offline and concentrated mode
CN104653420A (en) * 2015-02-09 2015-05-27 南京瑞柯徕姆环保科技有限公司 Tower solar thermal power generation method and system using closed Brayton cycle
CN104653419A (en) * 2015-02-09 2015-05-27 南京瑞柯徕姆环保科技有限公司 Closed Brayton tower solar thermal power generation method and system
CN104728063A (en) * 2015-03-24 2015-06-24 北京建筑大学 Solar-assisted liquefied natural gas electricity-heat-cold united supply system and method
CN110145407A (en) * 2019-05-31 2019-08-20 广东海洋大学 Device based on marine diesel engine cogeneration and sea water desalination
CN113074094A (en) * 2021-03-31 2021-07-06 承德石油高等专科学校 Biomass energy-tower type solar energy coupling power generation system based on organic Rankine cycle

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104296397A (en) * 2014-09-25 2015-01-21 陈九法 Device capable of utilizing heat of disk-type solar thermal collector in offline and concentrated mode
CN104653420A (en) * 2015-02-09 2015-05-27 南京瑞柯徕姆环保科技有限公司 Tower solar thermal power generation method and system using closed Brayton cycle
CN104653419A (en) * 2015-02-09 2015-05-27 南京瑞柯徕姆环保科技有限公司 Closed Brayton tower solar thermal power generation method and system
CN104728063A (en) * 2015-03-24 2015-06-24 北京建筑大学 Solar-assisted liquefied natural gas electricity-heat-cold united supply system and method
CN104728063B (en) * 2015-03-24 2017-04-26 北京建筑大学 Solar-assisted liquefied natural gas electricity-heat-cold united supply system and method
CN110145407A (en) * 2019-05-31 2019-08-20 广东海洋大学 Device based on marine diesel engine cogeneration and sea water desalination
CN110145407B (en) * 2019-05-31 2021-10-26 广东海洋大学 Device based on ship diesel engine waste heat power generation and sea water desalination
CN113074094A (en) * 2021-03-31 2021-07-06 承德石油高等专科学校 Biomass energy-tower type solar energy coupling power generation system based on organic Rankine cycle

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