Experiments on the Biporous Micropillar Array for Enhanced Heat Transfer Performance
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v002t12a001-mnhmt2016-6430.pdf
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Author(s)
He, Bin
Wei, Mengyao
Liang, Qian
Tan, Chuan Seng
Wang, Evelyn
Date Issued
January 2016
Journal
Volume 2: Micro/Nano-Thermal Manufacturing and Materials Processing; Boiling, Quenching and Condensation Heat Transfer on Engineered Surfaces; Computational Methods in Micro/Nanoscale Transport; Heat and Mass Transfer in Small Scale; Micro/Miniature Multi-Phase Devices; Biomedical Applications of Micro/Nanoscale Transport; Measurement Techniques and Thermophysical Properties in Micro/Nanoscale; Posters
Publisher
ASME International
Citation
He, Bin, Mengyao Wei, Qian Liang, Chuan Seng Tan, and Evelyn N. Wang. “Experiments on the Biporous Micropillar Array for Enhanced Heat Transfer Performance.” Volume 2: Micro/Nano-Thermal Manufacturing and Materials Processing; Boiling, Quenching and Condensation Heat Transfer on Engineered Surfaces; Computational Methods in Micro/Nanoscale Transport; Heat and Mass Transfer in Small Scale; Micro/Miniature Multi-Phase Devices; Biomedical Applications of Micro/Nanoscale Transport; Measurement Techniques and Thermophysical Properties in Micro/Nanoscale; Posters (January 4, 2016).
Version
Final published version
Abstract
A mathematical model has been developed in previous work to optimize the parameters of the biporous structures with micro channels among pillars to reduce the viscous force by shortening the liquid prorogation length inside porous media. In this paper, an experimental rig has been built to test the performance of the designed samples at ambient conditions according to the previ- ous derived mathematical model. The pillar areas of the samples have been fabricated by photolithograph and Deep Reactive-Ion Etching (DRIE) with varied parameters for further comparisons. To simulate the concentrated heating of a working device and measure its temperature, a Pt heater and four Resistance Ther- mal Detectors (RTDs) have been fabricated by the electron beam deposition and lift-off process. The sample has been mounted horizontally to a water-proof sample holder, and the de-ionized water has been pumped into the evaporator through a reservoir by a syringe pump. By fine tuning the pumping rate, one can reach the minimum pumping rate while maintaining the water levels of the reservoir and the evaporator without drying out for a certain heating power. The mathematical model has be par- tially verified by the experimental results, which paves the way for the final design of the silicon vapor chamber.
MIT Department
Singapore-MIT Alliance in Research and Technology (SMART)
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1115/MNHMT2016-6430
