1. Review of enhancement in heat transfer rate using nanofluids of helically coiled tube heat exchanger
Authors : Amol F. Niwalkar, Jagdeep M. Kshirsagar
Pages : 385-396
DOI : http://dx.doi.org/10.21172/1.81.050
Keywords : Nanofluid, Nanoparticles, Heat Exchanger, Convective Heat Transfer, Heat Transfer Coefficient Abstract :Helically coiled heat exchangers are globally used in various industrial applications for their high heat transfer performance and compact size. Nanofluids can provide the excellent thermal performance of this type of heat exchangers. Research studies on heat transfer enhancement have gained serious momentum during recent years and have been proposed many techniques by different research groups [1]. Normally heat transfer fluids have a low thermal conductivity that mainly affects the heat exchanger efficiency. A fluid with higher thermal conductivity has been developed to increase the efficiency of heat exchangers. The dispersion of 1-100nm sized solid nanoparticles in the traditional heat transfer fluids, termed as nanofluids, exhibit substantial higher convective heat transfer than that of traditional heat transfer fluids. Nanofluid is a heat transfer fluid which is the combination of nanoparticles and base fluid that can improve the performance of heat exchanger systems. In this present paper the efforts are made to understand that how to enhance the heat transfer rate in helically coiled tube heat exchangers using different nanofluids by studying research papers of various authors. The authors used different nanoparticles for their research work and compared the enhancement in heat transfer coefficient is with distilled water with different concentrations of nanofluids. In this paper, the preparation of nanofluid and the steps to prepare nanofluid is interpolated with the equations for heat transfer coefficient. The effect of nanofluids and their shape and size on friction factor, pressure drop and pumping power are subsumed in this study.
Citing this Journal Article :Amol F. Niwalkar, Jagdeep M. Kshirsagar, "Review of enhancement in heat transfer rate using nanofluids of helically coiled tube heat exchanger", Volume 8 Issue 1 - January 2017, 385-396
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