Review on Enhancement of Thermal Capacity in Heat Exchangers with Various Nanofluids

Abstract

AbstractOne of the most preferable modern technologies that have been invented to aid in the field of heat transfer purpose is the use of nanofluids in place of conventional fluids. The thermo-physical properties of nanofluids results in enhanced rate of heat transfer and that is why it has drawn the attention of researchers for more than a decade. Heat exchangers are broadly used in many areas of engineering field. There are many types of heat exchanger for example counter-shell and tube heat exchanger, plate type heat exchanger, spiral heat exchanger, etc. But it is cross flow heat exchanger works in a more effective manner with high rate of heat transfer. Efforts have been practiced to improve heat transfer rate in heat exchangers and to reduce transfer time and finally boost the energy utilization efficiency. The efforts generally include some passive and active methods like turbulence creation, exchange surface extension or the using fluids with better thermo-physical characteristics. Now-a-days, one of the most exclusively practiced methods for the increment of heat transfer rate in contrasting varieties of heat exchangers is the use of nanofluids. The objective of this review paper is to sum up the heat transfer improvement potential of nanofluids and the effect of its concentration and diameter on heat transfer enhancement.KeywordsNanoparticlesNanofluidCross-flow heat exchangerHeat transfer enhancementThermo-physical properties