Deposition Distribution and Thermal Resistance Analysis of Fins in Heat Exchangers

Weigang Xu, Shijian Zhang (), Quan Yang, Lei Zhang, Chongsheng Ge, Ao Wang, Shi Bu, Weibing Lv and Lin Zhang
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Weigang Xu: School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
Shijian Zhang: School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
Quan Yang: School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
Lei Zhang: School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
Chongsheng Ge: School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
Ao Wang: School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
Shi Bu: School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China
Weibing Lv: Changzhou Withon GreenTech Co., Ltd., Changzhou 213164, China
Lin Zhang: School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China

Energies, 2024, vol. 17, issue 16, 1-24

Abstract: The deposition of fly ash on the heat exchanger will reduce the heat transfer efficiency of the system. This article conducted experiments and simulations on the deposition, exploring the effects of velocity, particle size on the deposition position. In addition, deposition density distribution was demonstrated, the calculation method of fin thermal resistance was improved, and the efficiency of fins was also calculated. The results showed that deposition decreased with velocity increasing, and the simulation results were in good agreement with the experimental results. The deposition distribution of the first section of the fin is unimodal, and the maximum deposition value approaches the peak of the fin. The distribution of the second section of the fin becomes bimodal with increasing velocity. In addition, as the speed increases, due to the decrease in deposition mass, the thermal resistance decreases by 53.2% and the fin efficiency increases by 8.82%.

Keywords: gas-solid two phase flow; particle deposition; fins; thermal resistance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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