Evaluation and development of universal correlation on condensation frictional pressure drop for hydrocarbons in the tube side of spiral wound heat exchange

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-06-02 DOI:10.1016/j.icheatmasstransfer.2025.109152

Shulei Li, Liwei Zhao, Xin Liu, Daijin Li, Kan Qin

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引用次数: 0

Abstract

The calculation of condensation frictional pressure drop on hydrocarbons upward flow in helical pipes plays a significant role in design of spiral wound heat exchange for natural gas liquefaction. In recent decades, plenty of correlations were proposed to predict two-phase frictional pressure drop. However, the majority of them paid close attention to multifarious refrigerants in the straight tube while the others were focus on only steam and hydrofluorocarbon refrigerants in coil tube. Therefore, it is necessary to further assess their accuracies for hydrocarbon refrigerant in helical pipes. In this paper, the effects of operational and structural parameters on condensation frictional pressure drop were discussed. 455 data points for six different refrigerants were gained and 88 frictional pressure drop correlations were evaluated, which contained 69 separate flow models and 19 homogeneous flow correlations. The best two correlations were elected which can predict more than 80 % data points within ±30 % error. Finally, a universal improved correlation based on Fuchs's correlation has been proposed to predict hydrocarbons condensation frictional pressure drop in helical pipes. It can predict 94.53 % data points within ±20 % error, with a mean absolute relative deviation of 7.736 % for the whole 703 data points, collected from our numerical and new experimental studies and experimental investigation on hydrocarbons in previous literatures; as well as predict 94.66 % data points within ±25 % error, with a mean absolute relative deviation of 13.84 % for 337 data points on other refrigerants from experimental investigation in existing literatures. This study will provide some useful instructions to design more effective spiral wound heat exchange used for natural gas liquefaction.

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螺旋缠绕换热管侧烃类冷凝摩擦压降通用相关性的评价与发展

烃类在螺旋管内向上流动时冷凝摩擦压降的计算在天然气液化螺旋缠绕换热设计中具有重要意义。近几十年来，人们提出了大量的相关性来预测两相摩擦压降。然而，大多数研究关注的是直管中的多种制冷剂，而另一些研究则只关注盘管中的蒸汽和氢氟烃制冷剂。因此，有必要进一步评估其对螺旋管内烃类制冷剂的精度。本文讨论了操作参数和结构参数对冷凝摩擦压降的影响。获得了6种不同制冷剂的455个数据点，并评估了88个摩擦压降相关性，其中包含69个独立流动模型和19个均匀流动相关性。结果表明，在±30%的误差范围内，两种相关性的预测值在80%以上。最后，提出了一种基于Fuchs关联的通用改进关联，用于预测螺旋管内烃类凝聚摩擦压降。该方法对已有文献中烃类的数值研究、新实验研究和实验研究所得的703个数据点的预测精度为94.53%，误差在±20%以内，平均绝对相对偏差为7.736%；对现有文献中其他制冷剂实验调查的337个数据点，预测误差在±25%以内的数据点为94.66%，平均绝对相对偏差为13.84%。该研究为设计更有效的天然气液化螺旋缠绕换热装置提供了有益的指导。

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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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.