Correlations of condensation heat transfer in hydrophobic enhanced tubes with using R32

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-03-30 DOI:10.1016/j.icheatmasstransfer.2025.108886

Wei Li , Le Zhang , Tianwen Li , Jianghui Zhang , Yuan Dong , Lian-yun Wei , Jianfu Zhao , Zhixiao Zhang , David J. Kukulka

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引用次数: 0

Abstract

An experimental study of condensation heat transfer is performed in enhanced surface stainless steel tubes using refrigerant R32. An evaluation of the effect of hydrophobicity on condensation heat transfer is accomplished by comparing the performance of three enhanced tubes (hydrophobic (HYD), herringbone (HB), and hydrophobic/herringbone composite (HYD/HB)) to one smooth tube. Parameters include: saturation temperatures of 35 °C and 45 °C; mass flow rates of 100 kg/(m²·s) and 150 kg/(m²·s); and vapor qualities in the range from 0.2 to 0.9. A new condensation flow heat transfer correlation is established based on hydrophobicity and flow pattern analysis. The results indicate: (i) for varying mass flow rates, the HB tube exhibits superior heat transfer performance compared to the HYD and HYD/HB tube; (ii) as vapor quality increases, the HTC of the HYD tube gradually increases and becomes equal to that of the HB tube; (iii) for a vapor quality above 0.6, the HYD tube outperforms the HB tube. Five condensation flow HTC models are evaluated; experimental values were compared and analyzed with the calculated results in order to investigate the condensation flow heat transfer mechanism of enhanced tubes. Condensation flow heat transfer correlations in HYD, HB, and HYD/HB can predict data points within ±20 % including 80 % of the data points, and within ±25 % including 93 % of the data points.

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.