Published 8 issues per year
ISSN Print: 1065-5131
ISSN Online: 1563-5074
Indexed in
Study on Miniature Oscillating Heat Pipes
ABSTRACT
Heat transport rates of miniature heat pipes with inner diameter of 1.5 mm, 1.2 mm, and 0.9 mm were investigated by using R141b, ethanol and water as working fluids. The effects of the inner diameter, liquid volume faction, and material properties of the working fluids are examined. It is shown that the smaller the inner diameter, the higher the thermal transport density. For removing high heat flux, the water is the most promising working fluid as it has the largest critical heat transfer rate and the widest operating range among the three kinds of working fluids. A one-dimensional numerical simulation is carried out to describe the heat transport characteristics and the two-phase flow behavior in the closed-loop oscillating heat pipes. The numerical prediction agrees with the experimental results fairly well, when the input heat through is not very high and the flow pattern is slug flow.
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Choi Jongwook, Zhang Yuwen, Numerical simulation of oscillatory flow and heat transfer in pulsating heat pipes with multi-turns using OpenFOAM, Numerical Heat Transfer, Part A: Applications, 77, 8, 2020. Crossref
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