Heat‐transfer characteristics of polymer hollow fiber heat exchanger for vaporization application. Issue 5 (20th December 2017)

• Record Type: Journal Article
• Authors: Liu, Jun; Guo, Hong; Zhi, Xingxing; Han, Lei; Xu, Kai; Li, Baoan; Li, Hailei
• Is Part Of: AIChE journal. Volume 64:Issue 5(2018)
• Page Start: 1783
• Page End: 1792
• Publication Date: 2017-12-20
• Subjects: hollow fiber -- polymer evaporator -- numerical simulation -- heat transfer -- resistance distribution; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.16049
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract : The heat‐transfer characteristics of polymer hollow fiber heat exchanger were investigated by analyzing the heat‐transfer coefficient (HTC) and the heat‐transfer resistance (HTR) distributions of both the lumen side and the shell side. The influences of the fiber wall thickness and the polymer thermal conductivity on the heat‐transfer performance were studied numerically based on the experimental validated simulation model. It is found that the original overall HTC value is below 1032 W/m 2 ·K and the HTR is focus on the fiber wall. However, if enhancing the polymer thermal conductivity to be higher than 1.0 W/m·K and/or lowering the fiber wall thickness to be less than 0.1 mm, the overall HTC could be improved to over 2000 W/m 2 ·K, which indicates that the fiber wall HTR is no longer the limiting factor of the polymer hollow fiber heat exchanger applications. © 2017 American Institute of Chemical Engineers AIChE J, 64: 1783–1792, 2018