An Experimental Investigation of Flow Boiling Characteristics of Water in Parallel Microchannels
An Experimental Investigation of Flow Boiling Characteristics of Water in Parallel Microchannels
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DOI：
10.1115/1.1778187
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发表时间：
2004-08
影响因子：
--
通讯作者：
M. Steinke;S. Kandlikar
中科院分区：
文献类型：
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作者：
M. Steinke;S. Kandlikar
微通道被认为是许多先进的传热应用，包括汽车和固定燃料电池以及电子冷却。然而，从传热和流体力学的角度来看，仍有一些基本问题尚未解决。本工作的重点是获得基本的传热数据和两相流的流动沸腾过程中存在的微通道。对水力直径为207 μm的水平微通道内的流动沸腾进行了实验研究。参数范围为：质量通量从157到1782 kg/m2 s，热通量从5到930 kW/m2，入口温度为22°C，品质从过冷到1.0。和出口处的大气压力。相应的单相，全液体流雷诺数范围在饱和条件下是从116到1318。在实验误差范围内，单相绝热压降的测量值与传统理论值吻合较好
Microchannels are being considered in many advanced heat transfer applications including automotive and stationary fuel cells as well as electronics cooling. However, there are a number of fundamental issues from the heat transfer and fluid mechanics perspectives that still remain unresolved. The present work focuses on obtaining the fundamental heat transfer data and two-phase flow patterns present during flow boiling in microchannels. An experimental investigation is performed for flow boiling using water in six parallel horizontal microchannels with a hydraulic diameter of 207 μm. The ranges of parameters are: mass flux from 157 to 1782 kg/m 2 s, heat flux from 5 to 930 kW/m 2 , inlet temperature of 22°C, quality from sub-cooled to 1.0. and atmospheric pressure at the exit. The corresponding single-phase, all-liquid flow Reynolds number range at the saturation conditions is from 116 to 1318. The measured single-phase, adiabatic pressure drop agreed with the conventional theory within the experimental error