Abstract

This paper discusses the use of volumetric enhancers in ducts of heat exchangers for high-viscosity liquid media, which ensure the transition from a laminar flow to a turbulent one. Small random metal packings with a large free volume and an equivalent diameter of 5 to 25 mm were used as volumetric enhancers. It has been found that volumetric enhancers provide an increase in the heat transfer coefficient by a factor of 15 or more when industrial oil is heated. For a comparative assessment of the thermal hydraulic effectiveness of various packings, a modified expression of the Kirpichev energy coefficient has been obtained, which is associated with the thermal effectiveness of the process. The results of calculations are presented and conclusions are drawn about more effective designs of enhancers and operating modes.

中文翻译：

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用于高粘度液体介质的具有容积增强剂的换热器的热液压效率

摘要

本文讨论了在高粘度液体介质的热交换器管道中使用容积增强器，以确保从层流到湍流的过渡。具有大自由体积和 5 至 25 毫米等效直径的小无规金属填料用作体积增强剂。已经发现，当加热工业油时，体积增强剂使传热系数增加了 15 倍或更多。为了对各种填料的热力水力效率进行比较评估，已经获得了与过程热效率相关的基尔皮切夫能量系数的修正表达式。给出了计算结果，并得出了关于增强器和操作模式更有效设计的结论。