Abstract

This paper provides a comprehensive review of the published experimental researches on condensation heat transfer inside plain tubes. The existing methods of the research on heat transfer and hydrodynamics have been analyzed and their disadvantages are substantiated (shown). There are considered more than 40 empirical and semi-empirical methods and correlations for prediction of heat transfer coefficients in various heat exchangers, particularly in the evaporative systems of thermal desalinating plants, air conditioning systems, safety systems of reactors, heaters of power plants and condensers of cooling equipment. The given correlations are compared with the experimental data of various authors obtained in the case of condensation of diverse substances in different flow regimes. The correlations are evaluated with the experimental data of different authors for different fluids and flow conditions. According to the comparison performed, the correlations suggested by Thome and others (2003), Cavallini and others (2006), Shah (2015) and Rifert and others (2018) are recommended to be used for the most accurate prediction of heat transfer coefficients in case of condensation of various refrigerants, which in recent years are becoming widespread in power economy (fluid FC-72, methane, carbone dioxide, organic fluids R245fa, Novec®649, HFE-7000, steam, etc.).

中文翻译：

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普通管内薄膜凝结时的热传递。实验研究回顾

摘要

本文对已发表的有关普通管内冷凝传热的实验研究进行了全面综述。分析了传热和流体动力学研究的现有方法，并证实了它们的缺点（如图所示）。有40多种经验和半经验方法及相关方法可用于预测各种热交换器中的传热系数，特别是在热淡化厂的蒸发系统，空调系统，反应堆的安全系统，发电厂的加热器和冷凝器中冷却设备。将给定的相关性与不同物质在不同流动状态下凝结的情况下获得的不同作者的实验数据进行比较。使用不同作者针对不同流体和流动条件的实验数据评估相关性。根据进行的比较，建议使用Thome等人（2003），Cavallini等人（2006），Shah（2015）和Rifert等人（2018）建议的相关性，以最准确地预测传热系数。各种制冷剂冷凝的案例，近年来在功率经济中变得越来越普遍（流体FC-72，甲烷，二氧化碳，有机流体R245fa，Novec®649，HFE-7000，蒸汽等）。