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首页> 外文期刊>International Journal of Heat and Mass Transfer >An analytical study of laminar counterflow double-pass heat exchangers with external refluxes
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An analytical study of laminar counterflow double-pass heat exchangers with external refluxes

机译：具有外部回流的层流逆流双程换热器的分析研究

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摘要

A new device of inserting an insulation sheet or an impermeable sheet with negligible thermal resistance to divide an open duct into two channels with uniform wall temperature and with external refluxes at the ends. resulting in substantially improving the heat transfer, has been studied and investigated by an orthogonal expansion technique. The analytical results are represented graphically and compared with that in an open conduit of the same size without recycle. Considerable improvement in heat transfer is obtainable by employing double-pass operations with an impermeable sheet of negligible thermal resistance instead of using double-pass operations with an insulation sheet inserted and single-pass operations. The effect of sheet location on the enhancement of heat transfer efficiency as well as on the increment of power consumption, has been also discussed.
机译：一种插入热阻可忽略的绝缘片或不渗透片的新装置，可将敞开的管道分成壁温均匀且两端有外部回流的两个通道。已经通过正交膨胀技术对导致热传递显着改善的结果进行了研究。分析结果以图形方式表示，并与相同大小的开放式管道中的分析结果进行比较，而无需回收。通过采用对热阻可忽略的不透水片进行两次通过操作，而不是使用插入绝缘片的单次通过操作和单次操作，可以显着改善传热。还讨论了片材位置对提高传热效率以及对功耗增加的影响。

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