文章基本信息

标题：Thermal/ exergy and economic efficiency analysis of circumferentially corrugated helical tube with constant wall temperature
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作者：Haiji Chen ; Hazim Moria ; Saba Y. Ahmed 等
期刊名称：Case Studies in Thermal Engineering
印刷版ISSN：2214-157X
电子版ISSN：2214-157X
出版年度：2021
卷号：23
页码：100803
DOI：10.1016/j.csite.2020.100803
出版社：Elsevier B.V.
摘要：The effect of circumferential corrugations on the thermo-exergetic and economic efficiency of the helical tube is numerically studied for the first time. In the field of heat transfer enhancement, not only the heat transfer characteristics of the heat exchanger are important, but also the economic and financial issues play a key role. Hence, the present study is devoted to investigating both the thermal and economic advantages of using circumferential corrugations in a helical tube that has not been addressed in the literature before. In the present study, thermo-frictional properties of the circumferential corrugated tube as well as to PEC factor (Performance Evaluation Criteria) and Exergo-economic efficiency parameters are presented. Corrugations with three different pitch and depth were investigated. The tube wall had a constant temperature of 333.15 K. Results revealed that applying circumferential corrugation would lead to up to 1.54 times increment in the Nu number as well as 6.67 times increment of net profit per unit transferred heat load ( η p ) . Also, it was found that the total price of the unit transferred heat load ( η c ) of a corrugated tube could be up to 9% less than that of a smooth tube.
关键词：Economic efficiency ; Whitte-shamsunder efficiency ; Nusselt number ; Performance evaluation criterion