Influence of factors on heat dissipation performance of composite metal–polymer heat exchanger with rectangular microstructure. (5th June 2016)

• Record Type: Journal Article
• Authors: Zhuang, Jian; Huang, Changqing; Zhou, Gang; Liu, Zhiming; Xu, Hong; Wu, Daming; Fan, Yiqiang; Zhang, Yajun
• Is Part Of: Applied thermal engineering. Volume 102(2016:Jun.)
• Page Start: 1473
• Page End: 1480
• Publication Date: 2016-06-05
• Subjects: Microstructure heat exchanger -- Composite surface heat transfer coefficient -- Fin height -- Rectangular microstructure; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.04.007
• Languages: English
• ISSNs: 1359-4311

Abstract

Graphical abstract: Highlights: A metal–polymer composite rectangular microstructure heat exchanger was proposed. The control equations of heat exchanger can be solved by the iterative solution. Decreasing the thermal resistance can improve the cooling performance. The growth of fin pitch leads to a higher combined surface heat transfer coefficient. The airside thermal resistance decreases with the growth of the radiant emissivity. Abstract: Heat generated during the operation of the multi-functional system is significantly increased with the increasing of the system complexity. Moreover, the installation space of the heat exchanger will be smaller with the development of the technology. Thus, there is an incoming need for the radiators in micro scale. In this paper, a novel composite microstructure heat exchanger is proposed, which metal is used as the heat conducting unit and polymer microstructure is used as the cooling unit. The mathematical model and governing equation were also built to study the influences of some key factors (fin height, fin pitch, etc.) on the heat transfer performance based on MATLAB algorithm. Results showed that the heat transfer performance with the increase of fin height and radiant emissivity enhanced. The growth of fin height and the diminishing of fin pitch resulted in a lower composite surface heat transfer coefficient. When the width, height and pitch of the rectangle microstructure were 0.5 × 0.5 × 0.1 mm, the minimum value of the heat source temperature and total thermal resistance were obtained, which were 318.75 K and 4.15 K/W, respectively. The highest value of composite surface heat transfer coefficient (23.7 W/m 2 K) was obtained at the lowest fin height of 0.1 mm and the highest spacing of 0.5 mm.