Journal
ENERGY
Volume 106, Issue -, Pages 528-534Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2016.03.042
Keywords
Compressed air energy storage; Phase change materials; Exergy analysis; Thermal energy storage; PCM (phase change material); CAES (compressed air energy storage)
Categories
Funding
- Elevance Renewable Sciences
- NSERC
- Grain Farmers of Ontario
- GPA-EDC
- Industry Canada
- Northwater Capital
- Trent University
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Adiabatic compressed air energy storage is an emerging energy storage technology with excellent power and storage capacities. Currently, efficiencies are approximately 70%, in part due to the issue of heat loss during the compression stage. An exergy analysis is presented on a novel adiabatic compressed air energy storage system design utilizing a cascade of PCMs (phase change materials) for waste heat storage and recovery. The melting temperatures and enthalpies of the PCMs were optimized for this system and were shown to be dependent on the number of PCMs, the number of compression stages, and the maximum compression ratio. Efficiencies of storage and recovery using this approach are predicted to be as high as 85%, a 15% increase over current designs which do not incorporate PCMs. (C) 2016 Elsevier Ltd. All rights reserved.
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