Mathematical models for the study of solidification within a longitudinally finned heat pipe latent heat thermal storage system

The solidification of the phase-change material within a finned heat pipe l atent heat thermal storage system is studied by means of an analytical tech nique considering the radial heat propagation toward the heat pipe wall and the angular propagation toward the fin. Two approximations for the tempera ture profile along the fin height are used: a parabolic approximation (meth od I) and an exponential one (method II). The position of the solid-liquid interface is plotted according to the two methods for different fin numbers and the results are compared and discussed. (C) 1999 Elsevier Science Ltd. All rights reserved.