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Near Isothermal Combined Compressed Gas/Pumped-Hydro Electricity Storage with Waste Heat Recovery Capabilities

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Systems store energy mechanically at a first time and extract the energy at a later time. When excess electricity from renewable sources or during off-peak periods is available, a pump directs a working liquid (L) to pressurize a gas (G) that is confined within a pressure vessel. When electricity from renewable sources is not available or during periods of peak demand or pricing, the pressurized gas (G) directs the working liquid (L) through a hydropower turbine. The turbine drives a generator through a mechanical coupling to provide electricity for powering a load. In addition, the system can leverage (take) any waste heat as the input to boost the efficiency of the system. The described systems function at ground level and are modular and scalable in capacity.
Momen, Ayyoub Mehdizadeh (Knoxville, TN), Gluesenkamp, Kyle J. (Knoxville, TN), Abdelaziz, Omar A. (Knoxville, TN), Vineyard, Edward A. (Knoxville, TN), Abu-Heiba, Ahmed (Alexandria, EG), Odukomaiya, Adewale O. (Powder Springs, GA)
15/ 254,137
September 1, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT [0002] This invention was made with government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.