CN102817799A - Tower type Tesla turbine solar power generation device - Google Patents
Tower type Tesla turbine solar power generation device Download PDFInfo
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- CN102817799A CN102817799A CN2012103330061A CN201210333006A CN102817799A CN 102817799 A CN102817799 A CN 102817799A CN 2012103330061 A CN2012103330061 A CN 2012103330061A CN 201210333006 A CN201210333006 A CN 201210333006A CN 102817799 A CN102817799 A CN 102817799A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
Abstract
The invention provides a tower type Tesla turbine solar power generation device. The device comprises a solar energy receiving assembly, a heat transfer working medium circulation assembly, a low boiling point power generating working medium circulation assembly, a cooling working medium circulation assembly and a Tesla turbine power generating assembly. Compared with traditional steam turbine tower type solar thermal power generation systems, the device has the advantages that a Tesla turbine is composed of a simple disk and a turbine casing only, and complex blades which are difficult to design and machine are not required, so that the device is simple in structure, convenient to machine and low in usage and maintenance cost; besides, the heat utilization efficiency of steam turbines is only around 30%, a lot of energy of a heat working medium is lost from tails of steam turbines, the photoelectric conversion efficiency of solar thermal power generation systems is low, the heat utilization efficiency of the Tesla turbine of the device can exceed 90%, so that the photoelectric conversion efficiency of existing solar thermal power generation systems can be greatly improved; and the device can not only generate electricity but also provide hot water required by life for residents.
Description
Technical field
The present invention relates to technical field of new energies, be specially a kind of tower tesla turbine device of solar generating, be applied to of the conversion of low-quality heat energy to high-quality electric energy.
Background technique
Solar energy is inexhaustible because of having, pollution-free in numerous novel clean energy resourcies, characteristics more and more receive people's attention cheaply, and states such as the U.S., Japan, Germany, Israel are all in active research with develop the various method and apparatus that utilize solar energy.Solar electrical energy generation mainly is divided into two types: solar energy power generating and solar energy thermal-power-generating, wherein solar energy thermal-power-generating can be subdivided into again: tower type solar energy thermal power generation, trough type solar power generation, the generating of disc type solar energy heat, solar heat air-flow generating and the generating of solar pond heat.Solar energy power generating is to adopt solar cell to obtain HV through series-parallel system to charge a battery storage of electrical energy with big electric current, or directly converts direct current into life required Ac through inverter.Though solar energy power generating has been tending towards ripe from making the application technology aspect, its photoelectric transformation efficiency is lower, be merely about 10%, and because of the solar battery structure complicacy causes manufacture cost higher, more than the several times for traditional electricity generating device.Solar energy thermal-power-generating mainly is to utilize a large amount of reflectors with the mode that focuses on the solar energy direct light to be gathered together, and heating working medium produces the steam of HTHP, the steam acting of in steam turbine, expanding, pushing turbine high speed rotating, and drive generator for electricity generation.Solar heat power generation system all adopts steam turbine as the converting member of heat energy to mechanical energy, but the steam turbine complex structure, the difficult design of blade profile; The processing cost is very high; And the steam turbine energy conversion efficiency is low, is merely about 30%, and high temperature and high pressure steam still has higher temperature and speed behind turbine expansion; Most of energy is underutilized, and has limited the photoelectric transformation efficiency of solar energy to a certain extent.
Because of above-mentioned solar power system all exists photoelectric transformation efficiency low, complex structure, the shortcoming that the processing cost is high, patent of the present invention has for this reason proposed a kind of novel low-cost solar power system.
Summary of the invention
The technical problem that solves
In order to solve existing solar electricity generator complex structure; Problem such as build, processing cost is higher, and photoelectric transformation efficiency is lower, the present invention proposes a kind of tower tesla turbine device of solar generating; Utilize no leaf tesla turbine to substitute steam turbine in traditional solar heat power generation system as the heat energy conversion parts; Can make the solar electricity generator designs simplification, construction, processing cost decline to a great extent, and photoelectric transformation efficiency significantly improves.
Technological scheme
Technological scheme of the present invention is:
Said a kind of tower tesla turbine device of solar generating is characterized in that: comprise solar energy receive element, heat-transfer working medium recirculation assembly, low boiling generating working medium recirculation assembly, cooling working medium recirculation assembly and tesla's turbine generation assembly; Said solar energy receive element comprises heliostat and solar receiver; Said heat-transfer working medium recirculation assembly comprises heat-transfer working medium pump, heat-transfer working medium storage box, heat-transfer working medium control gear, heat reservoir and flow regulator; Said low boiling generating working medium recirculation assembly comprises low boiling generating working medium vaporizer, pressure stabilizer, high-pressure controlling device, back pressure case, pressure regulator, cold exchanger, low boiling generating working medium storage tank and supercharging liquid pump; The cooling working medium recirculation assembly comprises cooling working medium storage tank and cooling working medium control gear; Tesla's turbine generation assembly comprises tesla's turbine and generator;
In the said heat-transfer working medium recirculation assembly; The heat-transfer working medium storage box connects solar receiver through the heat-transfer working medium control gear; Solar receiver output heat-transfer working medium is to heat reservoir; Heat reservoir connects low boiling generating working medium vaporizer through flow regulator, and low boiling generating working medium vaporizer output heat-transfer working medium is got back to the heat-transfer working medium storage box behind the heat-transfer working medium pump;
In the said low boiling generating working medium recirculation assembly; Low boiling generating working medium storage tank is imported low boiling generating working medium vaporizer through the supercharging liquid pump with the low boiling generating working medium; After low boiling generating working medium vaporizer passes through pressure stabilizer and high-pressure controlling device successively with the low boiling generating working medium of gasification; Input tesla turbine; Get into cold exchanger from the low boiling generating working medium of tesla turbine output after through back pressure case and pressure regulator, the low boiling generating working medium in cold exchanger with the cooling working medium heat exchange after, get back in the low boiling generating working medium storage tank.
Said a kind of tower tesla turbine device of solar generating; It is characterized in that: constitute by one group of circular slender lobule dish and turbine case; There is the gap between the adjacent circular slender lobule dish; Turbine case wraps up circular slender lobule dish, and working medium gets into turbine from the turbine case tangential, carries out discharging from leaf disk center after the momentum transfer with work leaf dish.
Said a kind of tower tesla turbine device of solar generating; It is characterized in that: the pipe that said solar receiver is arranged by plurality of vertical is formed, and these pipes are arranged ringwise, form a cylindrical body; The adjacent pipe end is communicated with successively, and heat-transfer working medium flows through from all vertical tube interiors.
Said a kind of tower tesla turbine device of solar generating is characterized in that: heat-transfer working medium adopts nitrite.
Said a kind of tower tesla turbine device of solar generating, it is characterized in that: heat reservoir is inside and outside bilayer, inside and outside double-deck middle vacuum pumping, the internal layer internal surface is silver-plated, and outer outer surface adds wraps up in thermal insulating material.
Said a kind of tower tesla turbine device of solar generating is characterized in that: the low boiling generating working medium adopts water or ammonia or carbon dioxide.
Said a kind of tower tesla turbine device of solar generating is characterized in that: cooling working medium adopts water.
Beneficial effect
The present invention compares with traditional steam turbine tower-type solar thermal power generating system, and because of tesla's turbine only is made up of simple disk and turbine case, nothing is difficult to the complex leaf that designs and process, so simple in structure, easy to process, use, maintenance cost are low; The heat utilization efficiency of this external cause steam turbine is low; Only have about 30%; The significant amount of energy of hot working fluid runs off from the steam turbine afterbody; Cause the solar heat power generation system photoelectric transformation efficiency very low, and the tesla's turbine heat utilization ratio that is adopted among the present invention can reach more than 90%, can increase substantially the photoelectric transformation efficiency of existing solar heat power generation system; The present invention is except that can generating electricity, and also can be the resident provides life required hot water.
Description of drawings
Fig. 1 is tesla's turbine schematic representation
Fig. 2 is tesla's turbine sectional view
Fig. 3 is a tower tesla turbine solar power system schematic representation
Among the figure: 1-tesla turbine tangential inlet; The 2-turbine case; 3-whirlpool blade disk; The 4-turbine shaft; The 5-high-speed ball bearing; The 6-heliostat; The 7-solar receiver; The 8-heat reservoir; The 9-flow control valve; 10-low boiling generating working medium vaporizer; The 11-pressure stabilizer; 12-high-pressure modulating valve; The 13-generator; 14-tesla turbine; 15-back pressure case; The 16-pressure regulator valve; The 17-low temperature water tank; 18-low temperature water tank switch; The 19-cold exchanger; The 20-hot water tank; 21-low boiling generating working medium storage tank; 22-supercharging liquid pump; The 23-pump for liquid salts; 24-fused salt storage tank; 25-fused salt control valve.
Embodiment
Below in conjunction with specific embodiment the present invention is described:
Proposition in the present embodiment a kind of high efficiency solar power generation system; Be specially a kind of tower tesla turbine device of solar generating, comprise solar energy receive element, heat-transfer working medium recirculation assembly, low boiling generating working medium recirculation assembly, cooling working medium recirculation assembly and tesla's turbine generation assembly.
Said solar energy receive element comprises heliostat 6 and solar receiver 7.The heliostat minute surface adopts metallic mirror surface, shows and aluminizes, and can 95% of sunlight be reflexed to solar receiver; The pipe that described solar receiver is arranged by plurality of vertical is formed, and these pipes are arranged ringwise, form a cylindrical body, and the adjacent pipe end is communicated with successively, and heat-transfer working medium flows through from all vertical tube interiors; The pipe outer wall is coated with high temperature resistant coating for selective absorption, and the condenser focused solar is converted into heat energy fully.
Heat-transfer working medium adopts nitrite in the present embodiment, and its setting temperature is 142 degrees centigrade, and maximum temperature can be heated to 535 degrees centigrade, and has high specific heat and high fusion thermal property, can absorb the great amount of heat energy of receiver.The heat-transfer working medium recirculation assembly comprises pump for liquid salts 23, fused salt storage tank 24, fused salt control valve 25, heat reservoir 8 and flow control valve 9.In the heat-transfer working medium recirculation assembly; The fused salt storage box connects solar receiver through the fused salt control valve; Fused salt flows through from vertical tube inside, and at pipe internal surface, heat transmits to fused salt from wall with the mode of transmission of heat and thermoconvection; Fused salt is stored great amount of heat energy through the mode that increases substantially self temperature and fusion, thereby makes it become the high temperature heat source that can be used.Solar receiver output fused salt is to heat reservoir, and heat reservoir is designed to inside and outside bilayer, vacuum pumping in the middle of the internal and external layer; Prevent that the high-temperature molten salt and the external world from carrying out transmission of heat and thermoconvection; Play heat insulation effect, the internal layer internal surface is silver-plated, prevents that heat-storage medium from outwards carrying out thermal radiation; Outer outer surface adds wraps up in thermal insulating material, further prevents scattering and disappearing of heat reservoir heat.Flow control valve is installed in the heat reservoir below, and heat reservoir connects low boiling generating working medium vaporizer 10 through flow control valve, and fused salt is got back to the fused salt storage box by pump for liquid salts behind low boiling generating working medium vaporizer.
Adopting the purpose of flow control valve is when sunny, can reduce the aperture of flow control valve, and superfluous heat is stored in the heat reservoir, under the situation of night or sunlight deficiency, can the heat that store be discharged gradually, makes the work of power generation system continous-stable.
Said low boiling generating working medium recirculation assembly comprises low boiling generating working medium vaporizer 10, pressure stabilizer 11, high-pressure modulating valve 12, back pressure case 15, pressure regulator valve 16, cold exchanger 19, low boiling generating working medium storage tank 21 and supercharging liquid pump 22.
Low boiling generating working medium vaporizer is processed by heat-conducting property good metal heat sink material, and evaporator shell is processed by insulation, airtight, water-proofing material.Wherein low boiling generating working medium path adopts the U-shaped circuit design of turning back, and increases heat-conducting area, improves evaporation rate, be that the temperature of metal winding pipe raises with the rising of high-temperature molten salt temperature by the high-temperature molten salt of flow control valve entering around the U-bend.Low boiling generating working medium storage tank with low boiling generating working medium input low boiling generating working medium vaporizer, will be heated into the steam of high temperature, high pressure through the supercharging liquid pump rapidly when low boiling generating working medium process U-shaped metal tube.Low boiling working fluid can adopt water, ammonia or carbon dioxide etc.
The low boiling generating working medium that forms steam is successively through behind pressure stabilizer and the high-pressure modulating valve, and input tesla turbine does work thereby promote tesla's turbine, drives generator for electricity generation.Wherein pressure stabilizer is processed by adiabatic and resistant to elevated temperatures material; Sealing also has INSULATION DESIGN; To reduce scattering and disappearing for no reason of high-temperature steam heat energy; The pressure stabilizer below is equipped with the high-pressure modulating valve, and the vapor pressure of the aperture may command tesla turbine inlet of modulating valve makes tesla's turbine remain at continuous, stable operation under the optimal design blow down ratio.
, the low boiling generating working medium of tesla's turbine output gets into cold exchanger after passing through back pressure case and pressure regulator valve; The back pressure case can make tesla's turbine outlet back pressure constant, can change the magnitude of back pressure at tesla turbine outlet place through the pressure regulator valve of regulating the back pressure box back.
The low boiling generating working medium in cold exchanger with the cooling working medium heat exchange after, get back in the low boiling generating working medium storage tank.The good intensive spirality pipe of heat-conducting property is housed in the cold exchanger, and the design of spiral pipeline can increase the condensation path to a certain extent, prolongs the condensation time.
The cooling working medium recirculation assembly comprises low temperature water tank 17 and low temperature water tank switch 18, and cooling working medium adopts water in the present embodiment.Cooling water in the low temperature water tank 17 be full of after through the low temperature water tank switch cold exchanger spiral pipeline around; The weary steam of mistake after the acting of tesla's turbine output is condensed into liquid low boiling working fluid again through behind the cold exchanger; Cooling water then is heated into hot water behind cold exchanger; And be stored in the hot water tank 20 with INSULATION DESIGN, can supply resident's daily life used.
Said tesla turbine mainly is to be made up of one group of circular slender lobule dish and turbine case; The gap that exists between the adjacent leaf dish; Turbine case is wrapped in circular slender lobule dish, and working medium gets into turbine from the turbine case tangential, carries out discharging from leaf disk center after the momentum transfer with work leaf dish.Tesla's turbine and steam turbine have difference in essence on working mechanism: steam turbine is to impact blade through high pressure, high velocity air; Change the flow direction of air-flow and then realize the acting of air-flow through blade turbine; Tesla's turbine then is that the physical property (viscosity) of utilizing fluid realizes the transformation of energy between fluid and the turbine; After high-velocity fluid gets into turbine from the turbine case tangential, in turbine, form the helical streamline, form the boundary layer between fluid and the whirlpool blade disk; Can know that according to Newton's law of viscosity the leaf dish must receive the viscous effect power of fluid; The leaf dish is high speed rotating under the effect of viscous force, and the energy that will from fluid, be obtained is exported with the mode of air horsepower, drives generator for electricity generation.
The working procedure of this device is: during system start-up, fused salt to the molten state (142 degrees centigrade) in the heating fused salt storage tank 24 is opened fused salt control valve 25 and flow control valve 9; Start pump for liquid salts 23, fused salt is pressed into solar receiver from fused salt storage box 24, fused salt is elevated to more than 500 degrees centigrade through temperature behind the solar receiver; High-temperature molten salt after the heating flows into heat reservoir 8 rapidly, gets into low boiling working fluid vaporizer 10 through flow control valve 9, flows back to fused salt storage box 24 through pump for liquid salts then; After whole loop connects; Can close the heater in the fused salt storage box, the high-temperature molten salt behind the low boiling working fluid vaporizer can continue to heat still unfused solid-state fused salt in the fused salt storage box, makes its continuous fusing; Can reduce the starting time of system like this, also can improve the starting efficiency of system; After the system start-up, high-pressure modulating valve 12, pressure regulator valve 16, low temperature water tank switch 18 are opened, cooling water flows into cold exchanger 19 from low temperature water tank 17; Behind exchanger, get into hot water tank 20; Start supercharging liquid pump 22 simultaneously, low boiling working fluid is pressed into low boiling working fluid vaporizer 10 rapidly from low boiling working fluid storage tank 21, working medium heat absorption back instant vaporization is the steam of HTHP; Steam gets into tesla's turbine 14 through tesla's turbine tangential inlet 1 behind pressure stabilizer 11; The acceleration of in tesla's turbine, expanding of the vapor pressure of high-pressure modulating valve 12 can regulate tesla turbine ingress, steam is discharged from tesla turbine center at last; While whirlpool blade disk 3 high speed rotating under the viscous force effect; And through 13 generatings of coupling drive generator, the weary steam of the mistake after the acting gets into cold exchanger 19, the size of pressure regulator valve 16 can regulate tesla turbine outlet place back pressures through back pressure case 15; Cross weary steam and behind cold exchanger 19, return low boiling working fluid storage tank 21, restart new round circulation; When no sunlight, close fused salt control valve 25, pump for liquid salts will be stored in the high-temperature molten salt suction fused salt storage tank 24 gradually in the heat reservoir 8, continue generating; When the system thermal deficiency need stop; Close supercharging liquid pump 22 earlier; When treating that vapor pressure equates with the back pressure case in the pressure stabilizer 11; Close high-pressure modulating valve 12, pressure regulator valve 12 and low temperature water tank switch 18, treat the whole suction fused salt of the high-temperature molten salt storage tank 24 in heat reservoir 8 and the low boiling working fluid vaporizer 10 after, close pump for liquid salts 23 and flow control valve 9.
Claims (7)
1. a tower tesla turbine device of solar generating is characterized in that: comprise solar energy receive element, heat-transfer working medium recirculation assembly, low boiling generating working medium recirculation assembly, cooling working medium recirculation assembly and tesla's turbine generation assembly; Said solar energy receive element comprises heliostat and solar receiver; Said heat-transfer working medium recirculation assembly comprises heat-transfer working medium pump, heat-transfer working medium storage box, heat-transfer working medium control gear, heat reservoir and flow regulator; Said low boiling generating working medium recirculation assembly comprises low boiling generating working medium vaporizer, pressure stabilizer, high-pressure controlling device, back pressure case, pressure regulator, cold exchanger, low boiling generating working medium storage tank and supercharging liquid pump; The cooling working medium recirculation assembly comprises cooling working medium storage tank and cooling working medium control gear; Tesla's turbine generation assembly comprises tesla's turbine and generator;
In the said heat-transfer working medium recirculation assembly; The heat-transfer working medium storage box connects solar receiver through the heat-transfer working medium control gear; Solar receiver output heat-transfer working medium is to heat reservoir; Heat reservoir connects low boiling generating working medium vaporizer through flow regulator, and low boiling generating working medium vaporizer output heat-transfer working medium is got back to the heat-transfer working medium storage box behind the heat-transfer working medium pump;
In the said low boiling generating working medium recirculation assembly; Low boiling generating working medium storage tank is imported low boiling generating working medium vaporizer through the supercharging liquid pump with the low boiling generating working medium; After low boiling generating working medium vaporizer passes through pressure stabilizer and high-pressure controlling device successively with the low boiling generating working medium of gasification; Input tesla turbine; Get into cold exchanger from the low boiling generating working medium of tesla turbine output after through back pressure case and pressure regulator, the low boiling generating working medium in cold exchanger with the cooling working medium heat exchange after, get back in the low boiling generating working medium storage tank.
2. according to the said a kind of tower tesla of claim 1 turbine device of solar generating; It is characterized in that: constitute by one group of circular slender lobule dish and turbine case; There is the gap between the adjacent circular slender lobule dish; Turbine case wraps up circular slender lobule dish, and working medium gets into turbine from the turbine case tangential, carries out discharging from leaf disk center after the momentum transfer with work leaf dish.
3. according to claim 1 or 2 said a kind of tower tesla turbine device of solar generating; It is characterized in that: the pipe that said solar receiver is arranged by plurality of vertical is formed; These pipes are arranged ringwise; Form a cylindrical body, the adjacent pipe end is communicated with successively, and heat-transfer working medium flows through from all vertical tube interiors.
4. according to the said a kind of tower tesla of claim 3 turbine device of solar generating, it is characterized in that: heat-transfer working medium adopts nitrite.
5. according to the said a kind of tower tesla of claim 3 turbine device of solar generating, it is characterized in that: heat reservoir is inside and outside bilayer, inside and outside double-deck middle vacuum pumping, and the internal layer internal surface is silver-plated, and outer outer surface adds wraps up in thermal insulating material.
6. according to the said a kind of tower tesla of claim 3 turbine device of solar generating, it is characterized in that: the low boiling generating working medium adopts water or ammonia or carbon dioxide.
7. according to the said a kind of tower tesla of claim 3 turbine device of solar generating, it is characterized in that: cooling working medium adopts water.
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| CN201210333006.1A CN102817799B (en) | 2012-09-10 | 2012-09-10 | Tower type Tesla turbine solar power generation device |
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| CN201210333006.1A CN102817799B (en) | 2012-09-10 | 2012-09-10 | Tower type Tesla turbine solar power generation device |
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| CN105602872A (en) * | 2016-02-23 | 2016-05-25 | 武汉大学 | Bacterium for effectively degrading glyphosate |
| CN106460568A (en) * | 2014-06-16 | 2017-02-22 | 西门子股份公司 | System and method for supplying an energy grid with energy from an intermittent renewable energy source |
| CN108868890A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of tesla's turbine and control method |
| CN108868911A (en) * | 2018-01-12 | 2018-11-23 | 至玥腾风科技投资集团有限公司 | A kind of electricity generation system and its control method |
| CN109356805A (en) * | 2018-11-09 | 2019-02-19 | 中国能源建设集团江苏省电力设计院有限公司 | A kind of CO with high-temperature phase-change energy storage2Solar-thermal generating system and its control method |
| CN110500248A (en) * | 2019-08-19 | 2019-11-26 | 西北工业大学 | A kind of steam circulation generator with solar thermal collector and Helical recuperator |
| CN110985267A (en) * | 2019-10-31 | 2020-04-10 | 北京精密机电控制设备研究所 | Ultra-high speed tesla turbine type kerosene generator |
| WO2021243949A1 (en) * | 2020-06-03 | 2021-12-09 | 西安热工研究院有限公司 | Gas turbine power generation device using viscous force to convert pulse detonation gas energy |
| WO2022061381A1 (en) * | 2020-09-28 | 2022-03-31 | Hermann Oberwalder | Apparatus and method for converting thermal energy |
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| CN110985267A (en) * | 2019-10-31 | 2020-04-10 | 北京精密机电控制设备研究所 | Ultra-high speed tesla turbine type kerosene generator |
| WO2021243949A1 (en) * | 2020-06-03 | 2021-12-09 | 西安热工研究院有限公司 | Gas turbine power generation device using viscous force to convert pulse detonation gas energy |
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| WO2022061381A1 (en) * | 2020-09-28 | 2022-03-31 | Hermann Oberwalder | Apparatus and method for converting thermal energy |
| AT524253A1 (en) * | 2020-09-28 | 2022-04-15 | Hermann Oberwalder | Apparatus and method for converting thermal energy |
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