Southwest Research Institute

8 Rivers Capital, LLC

Owen M Pryor

Jeremy Eron Fetvedt

William M Conlon

James Jeffrey Moore

Timothy Charles Allison

Aaron M Rimpel

Ian Cormier

A system for using excess energy of a power generation system and an sCO2 (supercritical carbon dioxide) stream to store and generate power. An air separation unit uses the excess energy to cool and liquify ambient air into liquid nitrogen (L-N2) and liquid oxygen (L-O2). The L-O2 and L-N2 are stored until energy is desired. An L-O2 energy discharge path has an oxygen heat exchanger that vaporizes and heats the oxygen, a combustor that combusts the oxygen and fuel to produce exhaust, and a first turbine is driven by the exhaust to produce energy. An L-N2 energy discharge path has a nitrogen heat exchanger that vaporizes and heats the L-N2, thereby providing expanded nitrogen, and a second turbine is driven by the expanded nitrogen to produce energy. Heat for the heat exchangers on both discharge paths is provided by the sCO2 stream.

Charge, storage, and discharge energy system using liquid air and sCO2

Presently disclosed is a power production plant that is operable to store and generate power. In a 'charge mode' (when electricity price is low), an air separation unit (ASU) cools and liquefies ambient air into liquid oxygen (LOx), which is then stored in a storage vessel. In a “discharge mode” (when electrical price is high), the stored LOx is used by the power production plant to combust a fuel and form a combustion product stream that can be expanded in a turbine to generate power. The power production plant particularly can utilize carbon dioxide as a recycled, circulating or working fluid so that substantially all carbon dioxide produced in the power production can be captured.

Power production plant including liquid oxygen storage and method of operation of the power production plant

Apparatus and methods for storing energy in liquid air and releasing the energy through a thermal power cycle, that incorporates liquid carbon dioxide capture and separation from the exhaust stream.

Apparatus and method for liquid air energy storage with carbon dioxide capture

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San Antonio, TX, United States of America

Owen M Pryor