Measurement of Forced Convective Heat Transfer Coefficient of Low Volume Fraction CuO-PVA Nanofluids under Laminar Flow Condition

Ismat Zerin Luna^1, , A. M. Sarwaruddin Chowdhury¹, M. A. Gafur² and Ruhul A. Khan³

¹Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, Bangladesh

²Pilot Plant and Process Development Center (PP & PDC), Bangladesh Council of Scientific and Industrial Research, Dhaka, Bangladesh

³Institute of Radiation and Polymer Technology, Bangladesh Atomic Energy Commission, Savar, Dhaka, Bangladesh

Cite this paper:
Ismat Zerin Luna, A. M. Sarwaruddin Chowdhury, M. A. Gafur and Ruhul A. Khan. Measurement of Forced Convective Heat Transfer Coefficient of Low Volume Fraction CuO-PVA Nanofluids under Laminar Flow Condition. American Journal of Nanomaterials. 2015; 3(2):64-67. doi: 10.12691/ajn-3-2-3

Abstract

Experimental investigations of forced convective heat transfer coefficient of CuO-PVA nanofluids under uniform and constant heat flux are reported in this paper. Different nanofluid samples at different volume concentrations (0.05, 0.1 & 0.2%) were prepared by dispersing CuO NPs with an average size of 32.50 nm in 4 wt% PVA solution using ultrasonication and magnetic stirring. The forced convective heat transfer coefficient of the CuO-PVA nanofluids was measured with the help of vertical shell-and-tube heat exchanger where spiral circular copper tube was used. All the experiments were performed under laminar conditions ( Re ≤ 2300). The results under laminar flow conditions showed considerable enhancement of convective heat transfer with the use of nanofluids. There was increase in heat transfer coefficient of nanofluids CuO-PVA when compared with their base fluids. The increase is significant even though the concentration is less.

Keywords:
nanofluid shell-and tube heat exchanger forced convective heat transfer coefficient

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