[특허]Method and system for enhancing power output of renewable thermal cycle power plants

Clean Energy Systems, Inc.

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Method and system for enhancing power output of renewable thermal cycle power plants

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02C-003/30 F01K-007/34
미국특허분류(USC)	060/775; 060/039.48; 060/039.59; 060/653; 060/677; 060/679
출원번호	US-0381278 (2009-03-09)
등록번호	US-8631658 (2014-01-21)
발명자 / 주소	MacAdam, Scott Anderson, Roger E. Pronske, Keith L.
출원인 / 주소	Clean Energy Systems, Inc.
대리인 / 주소	Heisler & Associates
인용정보	피인용 횟수 : 5 인용 특허 : 7

초록
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A steam reheat process is provided to enhance a thermal power cycle, and particularly a renewable steam thermal cycle. An oxyfuel combustion gas generator is provided which combusts a hydrogen and/or carbon containing fuel with an oxidizer of primarily oxygen to generate products of combustion including steam and/or carbon dioxide. Water from the thermal cycle is directed to the reheater for mixing with the products of combustion within the reheater to generate a working fluid containing steam. This steam is routed through a turbine or other expander and power is outputted from the system. The water is optionally thereafter condensed and at least partially routed back to the thermal cycle. Any carbon dioxide within the working fluid can be separated in a condenser downstream of the expander for capture of the carbon dioxide, such that increased power output for the thermal power cycle is achieved without atmospheric emissions.

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1. A system for enhancing the power output of a renewable heat source Rankine cycle power plant with little or no increase in emissions, the renewable heat source Rankine cycle power plant having a working fluid including water, the water being heated by a renewable source of heat within the Rankine cycle power plant, the system comprising in combination: a reheater having a fuel inlet, an oxygen inlet and a steam inlet;a source of fuel upstream of said fuel inlet, said source of fuel including a fuel combustible with oxygen to produce products of combustion including steam and/or carbon dioxide;a source of oxygen upstream of said oxygen inlet, said source of oxygen including an oxidizer that is primarily oxygen;said steam inlet located downstream from the renewable source of heat of said Rankine cycle power plant to receive steam after the steam has been heated by the renewable source of heat of the Rankine cycle power plant;said reheater adapted to combust at least a portion of the fuel from said fuel inlet with at least a portion of the oxygen from said oxygen inlet to produce products of combustion including steam and/or carbon dioxide;said reheater adapted to combine the products of combustion generated within said reheater with the steam from said steam inlet to generate a working fluid including steam;said reheater including an outlet for the working fluid;a turbine downstream of said outlet of said reheater, said turbine adapted to output power from the power plant;wherein a condenser is provided downstream from said turbine, said condenser adapted to receive steam from said turbine and condense said steam into liquid water, said condenser including an outlet for the liquid water;wherein said source of fuel includes a fuel containing carbon therein, with the products of combustion within said reheater including steam and carbon dioxide, the carbon dioxide within the products of combustion causing carbon dioxide to be contained within the working fluid leaving said outlet of said reheater, said condenser adapted to separate carbon dioxide in the working fluid from water within the working fluid, with the carbon dioxide being in a gaseous state when leaving said condenser and the water being in a liquid state when leaving said condenser; andwherein said water outlet of said condenser, including water previously routed from the renewable heat source and water originally generated in said reheater by combustion of the fuel with the oxygen, is recycled to the renewable heat source of the Rankine cycle power plant at least partially. 2. The system of claim 1 wherein said carbon dioxide outlet of said condenser is coupled to a carbon dioxide collection system adapted to collect carbon dioxide away from the atmosphere, such that carbon dioxide is not emitted into the atmosphere by said system. 3. The system of claim 1 wherein said turbine downstream of said outlet of said reheater is a steam turbine. 4. The system of claim 1 wherein said turbine downstream of said outlet of said reheater is a gas turbine, said gas turbine having an outlet temperature above a condensation temperature for water. 5. The system of claim 4 wherein a heat recovery steam generator is located downstream of said gas turbine, said heat recovery steam generator adapted to give up heat to a second working fluid sufficient to condense steam within the working fluid generated in said reheater, the heat recovery steam generator including a liquid water outlet. 6. The system of claim 5 wherein said second working fluid is coupled to an expander for further power output from said system, said heat recovery steam generator including a gaseous carbon dioxide outlet. 7. A method for enhancing the power output of a renewable solar radiation heat source Rankine cycle power plant with little or no increase in emissions, the renewable heat source Rankine cycle power plant having a working fluid including steam, the steam being heated by a renewable solar radiation source of heat, the method including the steps of: providing a reheater, the reheater having a fuel inlet, an oxygen inlet and a steam inlet;coupling a source of fuel to the reheater upstream of the fuel inlet, the source of fuel including a fuel combustible with oxygen to produce products of combustion including steam and/or carbon dioxide;coupling a source of oxygen to the reheater upstream of the oxygen inlet of the reheater, the source of oxygen including an oxidizer that is primarily oxygen;positioning the steam inlet to receive steam after the steam has been heated by the renewable source of heat of the Rankine cycle power plant;combusting at least a portion of the fuel from the fuel inlet with at least a portion of the oxygen from the oxygen inlet within the reheater to produce products of combustion including steam and/or carbon dioxide;combining the products of combustion within the reheater with the steam from the steam inlet to generate a working fluid including steam;discharging the working fluid from an outlet of the reheater;outputting power from a working fluid expander located downstream of the outlet of the reheater;including the further steps of:detecting when actual output from the renewable source of heat is below a preselected level due to clouds or sun position; andadjusting a rate of reheater heat input to compensate for at least a portion of the deference between actual output of the renewable source of heat and the preselected level for the renewable source of heat. 8. The method of claim 7 wherein a steam turbine is located downstream of the steam in the Rankine cycle power plant and upstream of the steam inlet of the reheater, such that the steam passes through a turbine within the Rankine cycle power plant before the steam is routed to the reheater and to the turbine downstream of the output of the reheater, such that two separate turbines are provided at least partially in series with at least some of the steam passing through each of the turbines, and each of the turbines outputting power from the power plant. 9. The method of claim 7 including the further step of condensing at least a portion of the steam downstream of the turbine. 10. The method of claim 9 including the further step of configuring the source of fuel to include a fuel containing carbon therein, such that the products of combustion within the reheater include carbon dioxide and the working fluid includes carbon dioxide; and separating the carbon dioxide in gaseous form from the water in liquid form downstream from the turbine. 11. The method of claim 10 including the further step of routing the water from said separating step back to the Rankine cycle power plant upstream of the source of heat. 12. The method of claim 10 wherein said separating step includes the step of collecting gaseous carbon dioxide separated from the water in the working fluid with the carbon dioxide collected at least partially away from the atmosphere, such that carbon emissions into the atmosphere are diminished. 13. A hybrid carbon neutral power generation system, comprising in combination: a renewable source of heat adapted to heat a water containing working fluid;a pump upstream of said renewable source of heat, said pump adapted to pump the water containing working fluid to a higher pressure before entering said renewable source of heat;a reheater having a fuel inlet, an oxygen inlet and a water inlet;a source of fuel upstream of said fuel inlet, said source of fuel including a fuel combustible with oxygen to produce products of combustion including steam and/or carbon dioxide;a source of oxygen upstream of said oxygen inlet, said source of oxygen including an oxidizer that is primarily oxygen;said water inlet of said reheater adapted to receive water downstream from said source of heat;said reheater adapted to combust at least a portion of the fuel from said fuel inlet with at least a portion of the oxygen from said oxygen inlet to product products of combustion including steam and/or carbon dioxide;said reheater adapted to combine the products of combustion therein with the water from said water inlet to generate a working fluid including steam;said reheater including an outlet for the working fluid;an expander downstream of said outlet of said reheater, said expander adapted to output power from the hybrid carbon neutral power generation system;wherein said source of heat includes solar radiation; andwherein said reheater is adapted to be increased in output by increasing flow rates of the fuel and the oxygen into said reheater to compensate for changes in output of said solar radiation source of heat, when clouds or sun position decrease solar heat output, said expander correspondingly outputting more power than without said reheater output increase. 14. The system of claim 13 wherein said source of heat includes geothermal heat. 15. The system of claim 13 wherein said source of heat includes combustion of a biomass fuel. 16. The system of claim 13 wherein a condenser is provided downstream from said expander, said condenser adapted to receive the working fluid from said expander and condense water in the working fluid into a liquid state, said condenser including an outlet for the liquid water. 17. The system of claim 16 wherein said water outlet of said condenser is recycled to the Rankine cycle power plant at least partially, upstream of said source of heat. 18. The system of claim 17 wherein said source of fuel includes a fuel containing carbon therein, with the products of combustion within said reheater including carbon dioxide, the carbon dioxide within the products of combustion causing carbon dioxide to be contained within the working fluid leaving said outlet of said reheater, said condenser adapted to separate carbon dioxide in the working fluid from water within the working fluid with the carbon dioxide being in a gaseous state when leaving said condenser and the water being in a liquid state when leaving said condenser. 19. The system of claim 18 wherein said carbon dioxide outlet of said condenser is coupled to a carbon dioxide collection system adapted to collect carbon dioxide away from the atmosphere, such that at least a portion of the carbon dioxide generated by the reheater is not emitted into the atmosphere by said system. 20. The system of claim 19 wherein said source of fuel is a source of renewable fuel, such that with the collection of carbon dioxide away from the atmosphere, power is generated while reversing global warming in the atmosphere. 21. The system of claim 20 wherein said source of fuel is taken from the group including: biomass, landfill gas, glycerine, alcohols, biodiesel and biodigester gas. 22. The system of claim 13 wherein said source of fuel is a source of renewable fuel, such that fully renewable power is generated by the system. 23. The system of claim 13 wherein said source of heat heats the water containing working fluid to a temperature up to about 800° F.

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Method and system for enhancing power output of renewable thermal cycle power plants

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Method and system for enhancing power output of renewable thermal cycle power plants

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