A microchannel experimental apparatus for heat exchanging: design and analysis

Author

Wang, WeiDong ; Jia, Jianyuan ; Li, ZhiWu ; Fan, ChangQi

Author_Institution

Sch. of Electro-Mech. Eng., Xidian Univ., Xi´´an, China

fYear

2005

fDate

19-22 March 2005

Firstpage

60

Lastpage

64

Abstract

An experimental apparatus is developed for testing the heat-exchange performance of microchannel structures. This system mainly consists of microchannel heat exchangers, a simulated heat source, a micro-pump; a few of pipes, some three-way pipes and other test devices. The heat exchange coefficients and the fluid resistant in microchannels can be obtained by testing temperature, pressure and flow rate. The fluid resistance and heat transfer performance of microchannels are analyzed and investigated based on this experimental apparatus. It is shown that classical macroscopic formulas are not applicable for calculating friction resistance and heat exchange coefficients when channel hydraulic diameter is 381 μm. In this case, the flow resistance is smaller from 31.6% to 41.9% than that of calculated by classical macroscopic formulas, and the microchannel structure has a satisfied heat transfer performance while Nussle number being 9.2.

Keywords

flowmeters; heat exchangers; heat transfer; temperature measurement; 381 mum; fluid resistance; heat exchanging; heat transfer; macroscopic formulas; microchannel experimental apparatus; microchannel structures; Heat transfer; Hydraulic diameter; Microchannel; Micropumps; Performance analysis; Resistance heating; Temperature; Testing; Thermal management of electronics; Thermal resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Networking, Sensing and Control, 2005. Proceedings. 2005 IEEE

Print_ISBN

0-7803-8812-7

Type

conf

DOI

10.1109/ICNSC.2005.1461161

Filename

1461161