Entropy Generation Extrema and Their Relationship With Heat Exchanger Effectiveness— Number of Transfer Unit Behavior for Complex Flow Arrangements

Ramesh K. Shah; Teodor Skiepko

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Entropy Generation Extrema and Their Relationship With Heat Exchanger Effectiveness— Number of Transfer Unit Behavior for Complex Flow Arrangements

机译：熵产生极值及其与换热器效率的关系—复杂流动装置的传递单元行为数

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While the concept of minimum irreversibility is associated with the maximum energy efficiency for energy conversion processes in thermal systems, we have found that it is not quite applicable to the heat exchanger analysis. We have shown that the heat exchanger effectiveness can be maximum, having an intermediate value or minimum at the maximum irreversibility operating point depending on the flow arrangement of the two fluids. Similarly, the heat exchanger effectiveness can be minimum or maximum at the minimum irreversibility operating point. The objective of this paper is to illustrate and discuss such heat exchanger performance and irreversibility trends by combining the temperature difference irreversibility with the P-NTU results for complex flow arrangements.

机译：虽然最小不可逆性的概念与热系统中能量转换过程的最大能量效率相关，但我们发现它不适用于热交换器分析。我们已经表明，取决于两种流体的流动布置，热交换器效率可以是最大的，在最大不可逆操作点处具有中间值或最小值。类似地，在最小不可逆操作点处，热交换器效率可以最小或最大。本文的目的是通过将温差不可逆性与P-NTU结果相结合来说明和讨论这种热交换器的性能和不可逆性趋势，以应对复杂的流量安排。

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来源
《Journal of Heat Transfer》 |2004年第6期|p.994-1002|共9页
作者
Ramesh K. Shah; Teodor Skiepko;
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作者单位

Rochester Institute of Technology, Department of Mechanical Engineering, Rochester, NY 14623-5604, USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类热力工程、热机;
关键词
heat transfer; heat exchangers; second law; thermodynamics;

机译：传热换热器第二定律热力学;

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Entropy Generation Extrema and Their Relationship With Heat Exchanger Effectiveness— Number of Transfer Unit Behavior for Complex Flow Arrangements

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