In this paper, a figure of merit for the cooling capacity (FOMq) of phase change materials (PCMs) is defined from the analytical solution of the two-phase Neumann–Stefan problem of melting of a semi-infinite material with a fixed temperature boundary condition (BC). This figure of merit is a function of the thermophysical properties of a PCM and is proportional to the heat transfer across the interface with the surrounding medium in this general case. Thus, it has important implications for design and optimization of PCMs for high heat-flux thermal management applications. FOMq of example low melting point metals are presented which exceed those in common nonmetallic PCMs over the same temperature range by over an order of magnitude.
Cooling Capacity Figure of Merit for Phase Change Materials
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received September 26, 2014; final manuscript received July 20, 2015; published online September 2, 2015. Assoc. Editor: Amy Fleischer.
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Shamberger, P. J. (September 2, 2015). "Cooling Capacity Figure of Merit for Phase Change Materials." ASME. J. Heat Transfer. February 2016; 138(2): 024502. https://doi.org/10.1115/1.4031252
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