lecture5 - Efficiency change with respect to operating...

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2.996 Fundamentals of Advanced Energy Conversion Lecture Memo Lecture number: 5 Date: February 18 th , 2004 Chemical thermodynamics: Adiabatic flame temperature Enthalpy of reaction Low and high heating values Availability of a chemical reaction: Gibbs free energy, efficiency Direct conversion: Fuel cell
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Unformatted text preview: Efficiency change with respect to operating temperature Reactions in fuel cells Electrolyzer • Indirect conversion: Carnot cycle efficiency Internal combustion engine (SI) Otto cycle efficiencies 1) Air standard cycle 2) Fuel/air cycle 3) Complete/incomplete combustions...
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