Experimental Investigation of Heat Transfer Enhancement with Cu, Fe2O3 Ethyleneglycol Distilled Water Nanofluid in Horizontal Tube


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Abstract


The present investigates experimentally the pressure drop and convective heat transfer coefficient of ethylene glycol(EG) and distilled water (DW) based iron oxide (Fe2O3 (30nm)) and cupper (Cu (30nm)) nanofluids in horizontal tube (4mm inner diameter ,6mm outer diameter, and length=2.5m) in the fully developed laminar flow. The concentrations of nanofluid mixture used are ranging from (0.5 – 2.5% vol ). The properties of nanofluids (density, viscosity, thermal conductivity and specific heat) are practically measured. The obtained results show an increase in heat transfer coefficient of 38.4% for Fe2O3 + DW, 33.2 % for Fe2O3 + ( EG + DW ), 27.5%, for Fe2O3 + EG and 48.6 % for Cu + DW, 40.2% for Cu + ( EG + DW ), 29.7 % for Cu + EG . The measured results show that Cu with distilled water nanofluid gives maximum heat transfer enhancement compared with other nanofluid used. As well as the experimental results show that the data for nanofluids friction factor show a good agreement with analytical prediction from the Darcy's equation for single – phase flow. This paper decided that the nanofluid behaviors are close to the typical Newtonian fluids through the relationship between viscosity and shear rate. Moreover to NuR are used to present the corresponding flow and heat transfer inside the tub
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Keywords


Nanofluid; Ethylene Glycol; NuR; Enhancement

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