Optimization Process Parameters for a Single Loop Pulsating Heat Pipe Heat Exchanger

Abstract

An experimental investigation on single loop pulsating heat pipe(PHP) is presented in this work. A closed pulsating heat pipe heat exchanger with a single turn is fabricated by brass tube with 2 mm diameter and408 mm long andtested. The un-steady and steady state experiments are conducted and operating temperatures are measured. The experiments are conducted for different working fluids, heat inputs and maintained filling ratio as constant (50%). The derivedparameters consist of thermal resistance and heat transfer coefficient of PHP. The outcomes of this experiments show in periodic movement of the working fluid at lower values of heat input. The evaporator temperature at steady state is raisehigher for ethanol (C2H5OH) compared to acetone (H3CHO) and methanol(CH3OH). The condenser temperature at steady state is form lesser for acetone compared to methanol and ethanol. The temperature difference between evaporator and condenser at steady state is creating lesser for acetone compared to the methanol and ethanol.Lower value of thermal resistance and higher value of heat transfer coefficient are realized in case of acetone compared to methanol and ethanol.