Heat transfer studies in compact heat exchanger for ethylene glycol water system using graphene tio2 and zno nanofluids

Abstract

Heat exchangers are used in chemical process industries and engineering applications The enhancement of heating or cooling in an industrial process may create significant energy savings Addition of nanofluids to the base fluid is one of the promising techniques used recently to augment the rate of heat transfer The research framework was prepared to study the performance of nanofluids in compact heat exchanger corrugated plate heat exchanger For this study factorial Design of Experiments DOE was employed to evaluate the effect of various input parameters such as hot fluid inlet temperature nanofluid concentration and hot fluid flow rate on thermal conductivity of grapheme water nanofluids Heat transfer studies were performed with 16 runs as per MINITAB design software using graphene/water nanofluids in the corrugated plate type heat exchanger In order to find the effects on the thermal conductivity of graphene/water nanofluid three factors with two levels of hot fluid inlet temperature 35C and 85C nanofluid concentration 01 and 10 vol and hot fluid flow rate 2 lpm and 10 lpm were considered as input factors The Analysis of Variance ANOVA results revealed that the hot fluid inlet temperature and nanofluid concentration have significant effects and the hot fluid flow rate has less significant effect on the thermal conductivity of graphenewater nanofluids Based on the results of DOE the identified significant parameters such as hot fluid inlet temperature and nanofluid concentration were varied for the selected nanofluid and base fluid systems. newline