Research articles

Air-side heat transfer and friction characteristics of biofouled evaporator under wet conditions

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  • School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

Published date: 05 Sep 2010

Abstract

The effects of biofouling on air-side heat transfer and friction characteristics under wet conditions of three biofouled finned tube heat exchangers and one clean finned tube heat exchanger were investigated experimentally. Experimental results indicate that the biofouled fin efficiency of the evaporator decreases by 15.5% compared with the clean evaporator under the condition of the biofouled area ratio of 60% at the inlet air velocity of 2.0m/s; The ranges of friction fouling factor and heat transfer fouling factor are 19.8%―43.1% and ―15.6%―13.1%, respectively; a small quantity of biofouled particles can enhance heat transfer at low Reynolds number, and the enhancement effect decreases with the increase of Reynolds number.

Cite this article

Hui PU, Guoliang DING, Xiaokui MA, Haitao HU, Yifeng GAO, . Air-side heat transfer and friction characteristics of biofouled evaporator under wet conditions[J]. Frontiers in Energy, 2010 , 4(3) : 306 -312 . DOI: 10.1007/s11708-009-0067-0

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