Gradual oxidation with reciprocating engine
First Claim
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1. A split cycle reciprocating engine, comprising:
- an intake that receives an air-fuel mixture, the mixture comprising a mixture of air and a gas fuel;
a compression chamber, coupled to the reciprocating engine that compresses the mixture in a reciprocating piston chamber, the compression chamber comprising a first outlet;
an oxidation chamber that is configured to receive the mixture from the first outlet of the compression chamber via a first inlet and to maintain oxidation of the mixture at an internal temperature beneath a flameout temperature of the mixture and sufficient to oxidize the mixture without a catalyst, the oxidation chamber comprising a second outlet;
an expansion chamber, that receives oxidation product gas from the second outlet of the oxidation chamber and expands the product gas within the expansion chamber via a reciprocating piston;
a detection module that determines the internal temperature within the reaction chamber; and
a correction module that outputs instructions to reduce the internal temperature within the reaction chamber when an adiabatic temperature within the reaction chamber exceeds the flameout temperature of the fuel.
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Abstract
Described herein are embodiments of systems and methods for oxidizing gases. In some embodiments, a reaction chamber is configured to receive a fuel gas and maintain the gas at a temperature within the reaction chamber that is above an autoignition temperature of the gas. The reaction chamber may also be configured to maintain a reaction temperature within the reaction chamber below a flameout temperature. In some embodiments, heat and product gases from the oxidation process can be used, for example, to drive a turbine, reciprocating engine, and injected back into the reaction chamber.
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Citations
15 Claims
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1. A split cycle reciprocating engine, comprising:
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an intake that receives an air-fuel mixture, the mixture comprising a mixture of air and a gas fuel; a compression chamber, coupled to the reciprocating engine that compresses the mixture in a reciprocating piston chamber, the compression chamber comprising a first outlet; an oxidation chamber that is configured to receive the mixture from the first outlet of the compression chamber via a first inlet and to maintain oxidation of the mixture at an internal temperature beneath a flameout temperature of the mixture and sufficient to oxidize the mixture without a catalyst, the oxidation chamber comprising a second outlet; an expansion chamber, that receives oxidation product gas from the second outlet of the oxidation chamber and expands the product gas within the expansion chamber via a reciprocating piston; a detection module that determines the internal temperature within the reaction chamber; and a correction module that outputs instructions to reduce the internal temperature within the reaction chamber when an adiabatic temperature within the reaction chamber exceeds the flameout temperature of the fuel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A split cycle reciprocating engine, comprising:
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a reciprocation cycle comprising (i) at least one compression chamber having therein a reciprocating piston and (ii) at least one expansion chamber having therein a reciprocating piston; a heating cycle comprising (i) an intake that receives a gas air-fuel mixture comprising a mixture of air and a gas fuel, the intake being configured to direct the mixture to the compression chamber;
(ii) a reaction chamber, disposed along a flow path between the at least one compression chamber and the at least one expansion chamber and configured to receive the mixture from the compression chamber and to maintain oxidation of the mixture at an internal reaction chamber temperature sufficient to oxidize the mixture without a catalyst;
wherein the expansion chamber is configured to receive oxidation product gas from the reaction chamber and to expand the product gas within the expansion chamber via the reciprocating piston;a detection module that detects the internal reaction chamber temperature; and a correction module that outputs instructions, based on the detection module, to change at least one of (i) a chamber residence time of the mixture within the reaction chamber and (ii) an autoignition delay time within the reaction chamber sufficient for the mixture to autoignite and oxidize while within the reaction chamber and such that the mixture passes through a flammability area during a flammability residence time, less than the autoignition delay time. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification