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Abstract
A new thermal storage system using multiple phase change materials (PCMs) is developed. It consists of several shell-and-tube thermal storage exchangers, which are connected in series to improve the system efficiency. Each exchanger uses a different PCM. To reach optimal system efficiency, the melting points of the PCMs are carefully selected according to a thermodynamic optimization-analysis. A finite element model is developed to simulate the cyclic thermal process in the multi-exchanger system. Compulations were carried out for a three-exchanger system to investigate the advantages of the multiple-PCM system over the conventional single-PCM system. Simulation results were compared and found to be in good agreement with the results of a thermodynamic optimization analysis.
Notes
Address correspondence to Professor Anin S. Mujumdar, Department of Chemical Engineering, McGill University, 3480 University Street, Montreal, Quebec H3A 2A7, Canada.