Abstract The current study presents a mathematical model for a single cryogenic finned tube to investigate the effect of frost layer on the heat transfer performance under natural conditions. The proposed model was validated by the experimental data comprising a wide range of air conditions and cryogenic fluid flow rates. The thermal resistance distribution and the effect of the frost layer on the outlet temperature and on the heat transfer coefficient were modeled under different operating conditions. The results revealed that the maximum thermal resistance occurs in the liquid-phase section of the tube, and the two-phase section of the tube experiences the maximum frost thermal resistance. The decrease in the heat transfer caused by the frost layer largely depends on the flow rate of cryogenic fluid, followed by air temperature, and relative humidity. Finally, increasing the tube length lessens the effect of the frost layer on the heat transfer until the tube length reaches a given threshold at a fixed ratio of tube length to cryogenic fluid flow rate.

中文翻译：

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霜层对翅片管内低温流体传热的影响

摘要 目前的研究提出了单个低温翅片管的数学模型，以研究自然条件下霜层对传热性能的影响。所提出的模型通过实验数据进行了验证，该实验数据包括广泛的空气条件和低温流体流速。在不同的运行条件下模拟了热阻分布和霜层对出口温度和传热系数的影响。结果表明，管子液相段的热阻最大，管子两相段的霜冻热阻最大。霜层引起的传热减少主要取决于低温流体的流速，其次是气温，和相对湿度。最后，增加管长度会减少霜层对传热的影响，直到管长度在管长度与低温流体流速的固定比率下达到给定阈值。