Zero emissions closed rankine cycle power system
First Claim
1. A zero emissions closed Rankine cycle power generation system, comprising in combination:
- a closed Rankine cycle working fluid recirculation loop including a working fluid heater, a working fluid expander, a working fluid condenser and a working fluid pump;
a source of oxidizer, the oxidizer being a majority oxygen;
a source of fuel, the fuel being capable of combustion with oxygen to produce elevated temperature products of combustion;
a combustor having an oxidizer inlet downstream from said source of oxidizer, a fuel inlet downstream from said source of fuel, said combustor adapted to combust the fuel with the oxygen to produce elevated temperature products of combustion including water and carbon dioxide, and an outlet adapted to discharge the elevated temperature products of combustion from the combustor;
a heat exchanger downstream from said combustor outlet, said heat exchanger adapted to transfer heat from said elevated temperature products of combustion to the working fluid of said closed Rankine cycle as at least a portion of said working fluid heater; and
wherein said source of fuel includes both hydrocarbon fuel and carbon dioxide, at least a portion of the carbon dioxide in said source of fuel being carbon dioxide formed as a product of combustion of the hydrocarbon fuel with oxygen within said combustor.
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Accused Products
Abstract
A fuel combustion power generation system is provided operating as a closed loop Rankine cycle and with zero atmospheric emissions. The fuel is combusted with oxygen in a combustor to generate high temperature products of combustion. The products of combustion are routed to a first side of a heat exchanger. A second side of the heat exchanger has a working fluid of the closed loop Rankine cycle passed therethrough to boil the working fluid into a gas. The working fluid is then expanded, condensed back to a liquid and pumped back to high pressure for return to the heat exchanger the products of combustion enter a condenser, where gases are collected and liquids recirculated or released. The products of combustion can be expanded upstream of the heat exchanger. The fuel can be a gaseous fuel or a solid or liquid fuel, such as coal or biomass, with gasification before combustion.
49 Citations
28 Claims
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1. A zero emissions closed Rankine cycle power generation system, comprising in combination:
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a closed Rankine cycle working fluid recirculation loop including a working fluid heater, a working fluid expander, a working fluid condenser and a working fluid pump;
a source of oxidizer, the oxidizer being a majority oxygen;
a source of fuel, the fuel being capable of combustion with oxygen to produce elevated temperature products of combustion;
a combustor having an oxidizer inlet downstream from said source of oxidizer, a fuel inlet downstream from said source of fuel, said combustor adapted to combust the fuel with the oxygen to produce elevated temperature products of combustion including water and carbon dioxide, and an outlet adapted to discharge the elevated temperature products of combustion from the combustor;
a heat exchanger downstream from said combustor outlet, said heat exchanger adapted to transfer heat from said elevated temperature products of combustion to the working fluid of said closed Rankine cycle as at least a portion of said working fluid heater; and
wherein said source of fuel includes both hydrocarbon fuel and carbon dioxide, at least a portion of the carbon dioxide in said source of fuel being carbon dioxide formed as a product of combustion of the hydrocarbon fuel with oxygen within said combustor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A zero emissions power generation system featuring carbon dioxide recirculation with the fuel, comprising in combination:
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a source of oxidizer, the oxidizer being a majority oxygen;
a source of hydrocarbon fuel, the fuel being capable of combustion with oxygen to produce elevated temperature products of combustion including water and carbon dioxide;
a combustor having an oxidizer inlet downstream from said source of oxidizer, a fuel inlet downstream from said source of fuel, said combustor adapted to combust the fuel with the oxygen to produce the elevated temperature products of combustion, and an outlet adapted to release the elevated temperature products of combustion from the combustor;
an expander located downstream from said combustor outlet, said expander adapted to expand the products of combustion, and having a discharge; and
wherein said source of fuel includes both hydrocarbon fuel and carbon dioxide, at least a portion of the carbon dioxide in said source of fuel being carbon dioxide formed as a product of combustion of the hydrocarbon fuel with oxygen within said combustor. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. An oxy-fuel combustion power generation system with at least partially CO2 recirculating sequestration, comprising in combination:
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a combustor having a fuel inlet and an oxidizer inlet;
said combustor adapted to combust the hydrocarbon fuel from said fuel inlet with oxygen from said oxidizer inlet to produce products of combustion including water and carbon dioxide;
an expander adapted to expand the products of combustion and output power from the system;
a condenser adapted to condense water within the products of combustion from a gaseous phase to a liquid phase, said condenser including a liquid outlet for primarily water and a gaseous outlet for primarily carbon dioxide;
a carbon dioxide injector adapted to put CO2 from said condenser into a hydrocarbon fuel reservoir; and
a hydrocarbon fuel well accessing said hydrocarbon fuel reservoir, said hydrocarbon fuel well adapted to remove a combination of hydrocarbon fuel and carbon dioxide from said hydrocarbon fuel reservoir, at least a portion of the carbon dioxide removed by said hydrocarbon fuel well being carbon dioxide put into said hydrocarbon fuel reservoir by said carbon dioxide injector. - View Dependent Claims (26, 27, 28)
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Specification