Moist air condensation heat transfer enhancement via superhydrophobicity

Yu Lieh Wu, Jia Wei Zheng, M. Muneeshwaran, Kai Shing Yang, Chi Chuan Wang*

*此作品的通信作者

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

The main objective of the present study is to experimentally investigate the moist air condensation behavior subject to hydrophilic and superhydrophobic surface with a much broader operating conditions such as different relative humidities (RH = 40 – 85%) and degree of subcooling (ΔTsub= 1 – 16 K). The flow visualization of condensation behavior showed that the main condensate departure mechanism of the hydrophilic surfaces is gravity-driven sliding. In contrast, the primary mechanisms for the superhydrophobic surfaces are direct jumping and bounced-jumping caused by the coalescence induced phenomena. The superhydrophobic surfaces yielded a maximum of 36% improvement in heat transfer coefficient at 85% relative humidity over the hydrophilic surfaces, while the enhancement is about 16% for 60% and 40% relative humidities. Similarly, the maximum heat transfer coefficient of 37 W m-2 K−1 is attained at the subcooling temperature of 16 K, and it is reduced to 31 W m-2 K−1 and 20 W m-2 K−1 respectively when the subcooling is reduced to 6 K and 1 K.

原文English
文章編號121973
期刊International Journal of Heat and Mass Transfer
182
DOIs
出版狀態Published - 1月 2022

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