Energy and exergy analysis of a micro-compressed air energy storage and air cycle heating and cooling system

Energy storage systems are becoming more important for load leveling, especially for widespread use of intermittent renewable energy. Compressed air energy storage (CAES) is a promising method for energy storage, but large scale CAES is dependent on suitable underground geology. Micro-CAES with man-...

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Bibliographic Details
Published in:Energy (Oxford) 2010, Vol.35 (1), p.213-220
Main Authors: Kim, Y.M., Favrat, D.
Format: Article
Language:English
Subjects:
Air cycle heating and cooling
Applied sciences
Compressed air energy storage (CAES)
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Exergy
Micro-CAES
Second law
Theoretical studies. Data and constants. Metering
Thermodynamics, mechanics etc. For energy applications
Transport and storage of energy
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Summary:Energy storage systems are becoming more important for load leveling, especially for widespread use of intermittent renewable energy. Compressed air energy storage (CAES) is a promising method for energy storage, but large scale CAES is dependent on suitable underground geology. Micro-CAES with man-made air vessels is a more adaptable solution for distributed future power networks. In this paper, energy and exergy analyses of a micro-CAES system are performed, and, to improve the efficiency of the system, some innovative ideas are introduced. The results show that a micro-CAES system could be a very effective system for distributed power networks as a combination that provides energy storage, generation with various heat sources, and an air-cycle heating and cooling system, with a energy density feasible for distributed energy storage and a good efficiency due to the multipurpose system. Especially, quasi-isothermal compression and expansion concepts result in the best exergy efficiencies.
ISSN:0360-5442
DOI:10.1016/j.energy.2009.09.011