Experimental Study on the Effect of Nanoparticle Migration on the Convective Heat Transfer Coefficient of EG/Water-based Al2O3 Nanofluids

An experimental study to evaluate the convective heat transfer coefficient in a cylindrical packed bed of spherical porous alumina particles is investigated. The task consists in proposing a semi-empirical model to avoid excessive instrumentation and time consumption. The measurement of the bed temperature associated to a simple energy balances led to calculate the gas to particle heat transfer coefficient using a logarithmic mean temperature difference method. These experiments were performed at atmospheric pressure. The operating fluid is humid air. The gas velocity and temperature ranged from 1.7-3 m/s and 120-158?C, respectively. The data obtained was compared with the correlations reported in the literature. It is shown that the proposed model is in reasonable agreement with the correlation of Ranz and Marshall. Despite, many researches on experimental investigations of heat transfer coefficient in packed beds at low and average temperature are proposed, few studies presented calculation of convective heat transfer coefficient at high temperature (above 120?C). A possible application of the proposed model is drying and combustion.

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Experimental study on convective heat transfer coefficient around a vertical hexagonal rod bundle

Heat and Mass Transfer ◽

10.1007/s00231-011-0951-0 ◽

2011 ◽

Vol 48 (6) ◽

pp. 1023-1029 ◽

Cited By ~ 10

Author(s):

M. H. M. Makhmalbaf

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Heat Transfer Coefficient ◽

Transfer Coefficient ◽

Convective Heat Transfer ◽

Convective Heat ◽

Convective Heat Transfer Coefficient ◽

Rod Bundle

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Experimental investigation on intensified convective heat transfer coefficient of water based PANI nanofluid in vertical helical coiled heat exchanger

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2017.09.009 ◽

2018 ◽

Vol 128 ◽

pp. 134-140 ◽

Cited By ~ 46

Author(s):

B.A. Bhanvase ◽

S.D. Sayankar ◽

A. Kapre ◽

P.J. Fule ◽

S.H. Sonawane

Keyword(s):

Heat Transfer ◽

Experimental Investigation ◽

Heat Transfer Coefficient ◽

Heat Exchanger ◽

Transfer Coefficient ◽

Convective Heat Transfer ◽

Convective Heat ◽

Convective Heat Transfer Coefficient ◽

Water Based

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An Experimental Study on the Convective Heat Transfer Behaviour of Diamond Nanofluids in Electronic Cooling Applications

Volume 8A: Heat Transfer and Thermal Engineering ◽

10.1115/imece2018-87481 ◽

2018 ◽

Cited By ~ 2

Author(s):

Farzin Mashali ◽

Ethan M. Languri ◽

Jim Davidson ◽

David Kerns ◽

Fahad Alkhaldi

Keyword(s):

Heat Transfer ◽

Thermal Conductivity ◽

Experimental Study ◽

Heat Transfer Coefficient ◽

Transfer Coefficient ◽

Convective Heat Transfer ◽

Convective Heat ◽

Base Fluid ◽

Convective Heat Transfer Coefficient ◽

Cold Plate

This study presents the convective heat transfer coefficient of 0.05 wt.% diamond nanofluids containing functionalized nanodiamond dispersed in a base fluid deionized (DI) water flowing in a conduction cold plate under turbulent flow conditions, experimentally. The conduction cold plate was heated via six cartridge heaters with a constant heat transfer rate. The primary experimental study has been implemented to investigate the thermal conductivity of diamond nanofluids which showed a higher effective thermal conductivity than that of the base fluid. In addition, nanofluid was flowed in a closed system with heating at the heat exchanger and cooling via a cooling tank to keep the inlet temperature constant to explore the convection heat transfer properties of diamond nanofluids. Results indicate that the convective heat transfer coefficient and Nusselt number of diamond nanofluid are higher than that of the DI water in a same flow rate, and these properties increased with increase in Reynolds number.

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