Experimental study of the condensing heat transfer characteristics in a circular tube bank fin air cooler and the comparison to a flat tube bank fin air cooler

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Heat and Mass Transfer Pub Date : 2025-03-17 DOI:10.1016/j.ijheatmasstransfer.2025.126974

Shi-Qiang Zhu , Liang-Bi Wang , Xin Na , Zhi-Min Lin , Xiao-E Zhang

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引用次数: 0

Abstract

The direct air-cooling technology employed in power plants offers significant potential for conserving water resource. The condensing heat transfer characteristics in the tubes of air cooler are crucial, and such condensation is enforced by air flow. Now most air-cooling islands of power plant use finned flat tube instead of finned circular tube or circular tube bank fin air cooler (CTBFAC) to decrease the air flow pressure drop. This paper performs an experimental study of the condensing heat transfer characteristics in a CTBFAC. The condensing heat transfer characteristics of the CTBFAC are compared to that of the flat tube bank fin air cooler (FTBFAC). The main experimental results demonstrate that: air flow rate plays a vital role in condensation heat transfer, there are strong coupling correlations between the tube side liquid/steam Reynolds number (Re_LS/Re_s), Nusselt number (Nu_s) and the air side Reynolds number (Re_a): Re_LS = 0.748Re_a^0.759 (1−β/180)^−0.169, Re_s = 12.704Re_a^0.760 (1−β/180)^−0.162, Nu_s = 1.510Re_a^0.455 (1−β/180)^−0.216, within the range of Re_a from 295 to 1100 and the range of inclination angle (β) from 30° to 90°. At the same Re_LS/Re_s, Nu_s of the CTBFAC is significantly higher than that of the FTBFAC.

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来源期刊

International Journal of Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer