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首页> 外文期刊>Journal of Heat Transfer >Performance Analysis of Printed Circuit Heat Exchanger for Supercritical Carbon Dioxide
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Performance Analysis of Printed Circuit Heat Exchanger for Supercritical Carbon Dioxide

机译：超临界二氧化碳印刷电路板换热器性能分析

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摘要

A printed circuit heat exchanger (PCHE) was selected as the recuperator of supercritical carbon dioxide (S-C0_2) Brayton cycle, and the segmental design method was employed to accommodate the rapid variations of properties ofS-CO_2. The local heat capacity rate ratio has crucial influences on the local thermal performance of PCHE, while having small influences on the frictional entropy generation. The heat transfer entropy generation is far larger than the frictional entropy generation, and the total entropy generation mainly depends on the heat transfer entropy generation. The axial conduction worsens the thermal performance of PCHE, which becomes more and more obvious with the increase of the thickness and thermal conductivity of plate. The evaluation criteria, material, and size of plate have to be selected carefully in the design of PCHE. The present work may provide a practical guidance on the design and optimization of PCHE when S-CO_2 is employed as working fluid.
机译：选择印刷电路换热器（PCHE）作为超临界二氧化碳（S-CO_2）布雷顿循环的换热器，并采用分段设计方法来适应S-CO_2性质的快速变化。局部热容量率比对PCHE的局部热性能有关键影响，而对摩擦熵的产生影响很小。传热熵的产生远大于摩擦熵的产生，总熵的产生主要取决于传热熵的产生。轴向传导使PCHE的热性能恶化，随着板的厚度和热导率的增加，PCHE的热性能变得越来越明显。在PCHE的设计中，必须仔细选择评估标准，材料和板的尺寸。当S-CO_2用作工作流体时，本工作可为PCHE的设计和优化提供实用指导。

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