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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

Oscillatory Flow Regenerative Heat Exchangers for Application to Energy Storage Systems

Chao Zhang
Siemens Co., Irvine, California, 92618, USA

Perry Y. Li
Department of Mechanical Engineering, University of Minnesota, 111 Church St. S.E., Minneapolis, Minnesota 55455, USA

James D. Van de Ven
Department of Mechanical Engineering, University of Minnesota, 111 Church St. S.E., Minneapolis, Minnesota 55455, USA

Terrence W. Simon
Department of Mechanical Engineering, University of Minnesota, 111 Church St. S.E., Minneapolis, Minnesota 55455, USA

Abstract

Compressed Air Energy Storage (CAES) is being considered for application to the power grid. It is most effective when generation is with intermittent sources, such as wind and solar. Energy is stored as compressed air when power is available and released by expansion when power is needed. For optimum efficiency, thermal energy must be removed from the air being compressed and returned under expansion, an unsteady, regenerative heat exchange process. Key to success is high-efficiency, rapid heat transfer. This paper discusses recent experience with CAES regenerators, presenting computational and experimental results. Suggestions are made for improvements over present heat exchangers. The heat exchangers are modeled as 3D porous media where correlations are derived for particular regenerator designs constructed of staggered parallel plates.

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