Author(s)

K.A.R. Ismail & M.M. Gongalves

Abstract

Effectiveness NTU performance of finned PCM storage unit K.A.R. Ismail, M.M. Gongalves Campinas, SP, Brazil ABSTRACT This paper presents a mathematical model based upon two dimensional formulation of the phase change heat transfer problem around externally finned tube immersed in the PCM while the working fluid flows through it. The energy equation is written in its enthalpic form and the heat and flow processes are coupled by an energy balance on the fluid element flowing inside the tube. The numerical solution is based upon the control volume technique and ADI finite difference representation. The results obtained show the effect of the geometrical parameters such as number of fins, fin length, compactness ratio and the fin thickness on the solidified mass, NTU and effectiveness. INTRODUCTION Analytical solutions to the heat transfer problem with phase change although very important are limited to very special cases of little practical interest. Many semi-analytical me

Keywords