Hydraulic and thermal characteristics of a vapor venting two-phase microchannel heat exchanger

被引：83
|
作者：
David, Milnes P. [1 ]
Miler, Josef [1 ]
Steinbrenner, Julie E. [1 ]
Yang, Yizhang [2 ]
Touzelbaev, Maxat [2 ]
Goodson, Kenneth E. [1 ]
机构：
[1] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA
[2] AMD Inc, Sunnyvale, CA 94088 USA
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2011年 / 54卷 / 25-26期
关键词：
Vapor separation; Microchannel heat exchanger; Two phase; Flow boiling; Porous hydrophobic membrane; SINGLE-PHASE FLOW; PRESSURE-DROP; TRANSFER MODEL; PART II; INSTABILITIES; EVAPORATION; PREDICTION; SINK;
D O I：
10.1016/j.ijheatmasstransfer.2011.07.040
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In the present work we design, model and experimentally characterize a two-phase vapor venting parallel microchannel heat exchanger capped with a 220 nm pore, hydrophobic PTFE membrane that vents the vapor phase into separate vapor transport channels. We compare the performances of a traditional non-venting heat exchanger and the vapor-separating version operating at heat fluxes of up to 820 kW/m(2) and water mass fluxes of between 102 and 420 kg/s m(2). We find similar to 60% improvement in the normalized pressure drop and up to 4.4 degrees C reduction in the average substrate temperature between the control and vapor venting device under similar operating conditions. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5504 / 5516
页数：13
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