Abstract
To offer essential basic information for analyzing a thermal-energy storage system based on the form-stable phase change of plastics, particle-to-fluid heat transfer coefficients in fixed beds packed with cross-linked cylindrical plastic particles subjected to melt-freeze cycles were evaluated experimentally using the extended Schumann theory. A formula for estimating the heat transfer coefficient is presented. The resulting heat transfer coefficients were found to be definitely lower than those predicted from previously published work, due to the melt adhesion between adjacent plastic particles, which increases their contacting surface area and, consequently, increases the dead space in the interstitial flow region. © 1998 Scripta Technica. Heat Trans Jpn Res, 26(4): 262–274, 1997
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