A modified efficiency-NTU method (m-ε-NTU) for calculating air coolers in dehumidifying or frost conditions. Part IV

V. A. Portyanikhin
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Abstract

In this part of the article, the algorithm for applying the newly developed m--NTU method for calculating air coolers in dehumidifying or frost conditions is described step by step, and its comparison with the method of segmented division of the heat exchanger is also given. This comparison showed good convergence of the calculation results with a multiple reduction in their execution time. The value of the deviation of the calculated value of the power calculated using the newly developed method from the same value calculated using the method of segmented division averaged 3,23% modulo and does not exceed 4,5% modulo. When the heat exchanger is divided into 40 segments, the execution time of the calculation programs increases approximately 18 times compared to using the newly developed method, which can be called a significant advantage of the latter. Considering the above, the newly developed method can be widely used for the selection of air coolers, their verification and design calculations.
用于计算除湿或结霜条件下空气冷却器的修正效率-NTU 法(m-ε-NTU)。第四部分
在这部分文章中,逐步描述了应用新开发的 m--NTU 方法计算除湿或结霜条件下的空气冷却器的算法,并将其与热交换器的分段划分方法进行了比较。比较结果表明,计算结果收敛性良好,执行时间缩短了数倍。使用新开发的方法计算出的功率值与使用分段分割方法计算出的相同功率值的偏差值平均为 3.23%(模数),不超过 4.5%(模数)。当换热器被分成 40 段时,计算程序的执行时间比使用新开发的方法增加了约 18 倍,这可以说是后者的一个显著优势。综上所述,新开发的方法可广泛应用于空气冷却器的选择、验证和设计计算。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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