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Experimental study on liquid single-phase forced convection heat transfer characteristics in concentric circular microchannels

Journal of National Fisheries University Volume 70 Issue 3 Page 91-100
published_at 2022-01
70-3-91-100.pdf
[fulltext] 1.07 MB
Title
同心円状マイクロチャネル内での液単相強制対流熱伝達特性に関する実験的研究
Experimental study on liquid single-phase forced convection heat transfer characteristics in concentric circular microchannels
Abstract
In this research, aiming at efficient cooling of the locally concentrated heating part of the electronic element, a new concentric circular microchannel plate that can efficiently cool the CPU is designed in consideration of the heat generation characteristics of the CPU. Then, we conducted an experiment on heat transfer when water was used as the refrigerant for this new microchannel plate, and grasped the basic heat transfer characteristics. Furthermore, by comparing the results with the straight microchannel plate having a simple structure, the heat transfer promotion of the concentric microchannel plate was examined. By using a concentric microchannel plate, the temperature at the center of the heater can be maintained at about 25℃, and even when compared with a straight microchannel plate, the temperature rise can be suppressed by about 8 to 23℃. The heat transfer coefficient of the concentric circular microchannel plate is 6 to 8 kW/m^2 K, which is almost constant, and about four times higher than the heat transfer coefficient of the straight microchannel plate at the same heat quantity and the same flow rate. In addition, the research results were compared with the previously proposed experimental correlation equation for single phase forced convection laminar heat transfer of straight microchannnels.
Creators Ohara Junichi
Creators Ishida Masateru
Source Identifiers
Creator Keywords
Microchannel Heat transfer Concentric circular Water cooling
Languages jpn
Resource Type departmental bulletin paper
Publishers National Fisheries University
Date Issued 2022-01
File Version Version of Record
Access Rights open access
Relations
[ISSN]0370-9361