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Energy recovery during expansion of compressed gas using power plant low-quality heat sources

United States Patent

March 7, 2006
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A method of recovering energy from a cool compressed gas, compressed liquid, vapor, or supercritical fluid is disclosed which includes incrementally expanding the compressed gas, compressed liquid, vapor, or supercritical fluid through a plurality of expansion engines and heating the gas, vapor, compressed liquid, or supercritical fluid entering at least one of the expansion engines with a low quality heat source. Expansion engines such as turbines and multiple expansions with heating are disclosed.
Ochs; Thomas L. (Albany, OR), O'Connor; William K. (Lebanon, OR)
The United States of America as represented by the United States Department of Energy (Washington, DC), N/A (
10/ 309,287
December 4, 2002
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to employer/employee agreements between the U.S. Department of Energy (DOE) and the inventors.