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首页> 外文会议>International Conference on Applied Energy >Numerical study on thermal-hydraulic performance of a two-sided etched zigzag-type high-temperature printed circuit heat exchanger
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Numerical study on thermal-hydraulic performance of a two-sided etched zigzag-type high-temperature printed circuit heat exchanger

机译：双面蚀刻Z字形型高温印刷电路热交换器热液压性能的数值研究

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摘要

The thermal-hydraulic performance of a two-sided etched zigzag-type printed circuit heat exchanger is numerically investigated at high temperature of 900°C and high pressure above 7 MPa. It is found the global non-dimensional parameters at high temperature and high pressure is significantly related to the operating condition, but the local pitch-averaged non-dimensional parameters can be used to predict the thermal-hydraulic performance of printed circuit heat exchanger in a wide operating condition. The additional elliptical upper channel can improve the heat transfer of printed circuit heat exchanger, but increase its pressure drop simultaneously. Compared to the baseline design without elliptical upper channel, the Nusselt number in the modified model with upper channel d=0.234 mm is increased by 7%-17%, while the Fanning friction factor is increased by 5%-12%. However, the Nusselt number in the modified model with upper channel d=0.512 mm is only increased by 3%-5% and the Fanning friction factor is only increased by 5%-6% compared to the modified model with upper channel d=0.234 mm.
机译：双面蚀刻的锯齿类型的印刷电路热交换器的热工水力性能在高温下的数值研究900℃以上7兆帕高压。已经发现在高温和高压下的全球无量纲参数被显著相关的操作条件下，但局部节距平均无量纲参数可以被用于预测在印刷电路热交换器的热工水力性能较宽的工作状态。附加椭圆上通道可以提高印刷电路热交换器的热传递，但同时增加它的压力降。相比于基线设计，而不椭圆上部通道，在具有上部通道d =0.234毫米改进模型努塞尔数增加7％-17％，而范宁摩擦系数增加了5％-12％。然而，在具有上部通道d =0.512毫米改进模型努塞尔数仅增加3％-5％和范宁摩擦系数仅增加5％-6％相比于上部通道d = 0.234的修改的模型毫米。

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