Numerical investigation and design optimization of a novel polymer heat exchanger with ogive sinusoidal wavy tube

被引:6
|
作者
Kang, Heeseung [1 ]
Han, Ukmin [1 ]
Lim, Hongyoung [1 ,2 ]
Lee, Hoseong [1 ]
Hwang, Yunho [3 ]
机构
[1] Korea Univ, Dept Mech Engn, 409 Innovat Hall Bldg, Seoul, South Korea
[2] Hanon Syst, Global Adv Technol, 95 Sinil Westro, Daejeon, South Korea
[3] Univ Maryland, Ctr Environm Energy Engn, 3157 Glenn L Martin Hall Bldg, College Pk, MD 20742 USA
基金
新加坡国家研究基金会;
关键词
Polymer heat exchanger; Bare-tube heat exchanger; Sinusoidal wavy channel; Selective-series CFD; Multi-objective optimization; APPROXIMATION-ASSISTED OPTIMIZATION; THERMAL-CONDUCTIVITY; PRESSURE-DROP; BUNDLE; FLOW; PERFORMANCE; EMPHASIS;
D O I
10.1016/j.ijheatmasstransfer.2020.120785
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this paper, a novel polymer bare-tube heat exchanger (BTHX) with an ogive tube shape and a sinusoidal wavy channel is proposed and investigated for the liquid-to-gas application. The thermal-hydraulic performance of the proposed polymer BTHX is calculated using a validated computational fluid dynamics (CFD) simulation model, and the performance is optimized by setting nine independent design variables. A selective-series CFD method with an approximation-assisted optimization technique is developed for the multi-objective optimization to reduce the computational time. As a result, the thermal-hydraulic performance of the optimized novel polymer BTHX shows 91.5% and 134.9% of that of the target aluminum louvered-fin micro-channel heat exchanger (MCHX), respectively. This is mainly due to the improved air-side heat transfer coefficient of the proposed polymer BTHX by 70.2% compared to the target aluminum MCHX. Compared to the recent teardrop-shaped polymer BTHX, the thermal-hydraulic performance of the proposed BTHX is significantly improved. Regarding the polymer thermal conductivity, it is found that the thermal performance degradation can be minimized with at least 8.0 W.m(-1) K-1 of the thermal conductivity. The flow field of the proposed polymer BTHX is also discussed and shows that the unique structure of the sinusoidal wavy tube can reduce the air-side pressure drop and promote the mixing of the air flow, thereby improving the air-side convective heat transfer. (C) 2020 Elsevier Ltd. All rights reserved.
引用
收藏
页数:20
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