A design procedure for gravity-assisted heat pipe heat exchanger

Abstract This paper presents a theoretical approach to the design of gravity-assisted heat pipe heat exchangers (GAHPHE). Based on this analysis, the variation of overall effectiveness of GAHPHE with C e /C e , for different values of: tube spacing normal to the direction of flow; number of fins per metre; fin thickness and evaporator and condenser lengths, are plotted. Furthermore, in order to obtain an optimum design for GAHPHE, the variation of overall effectiveness with conductance ratio for different values of modified number of transfer units, for a rather broad design range, is presented.