Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes
Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes
复制标题
扩管对微翅片管冷凝传热及压降特性的影响
DOI：
10.3389/fenrg.2021.811054
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发表时间：
2021-12
影响因子：
3.4
通讯作者：
Zhixiang Lan
中科院分区：
文献类型：
--
作者：
Na Liu;Qian Zhao;Zhixiang Lan
尽管对原始微翅片管的冷凝传热和压降特性进行了大量的研究，但对管膨胀影响的实验研究尚未在公开文献中报道。本文报道了R1234ze(E)在原始（5.10mm OD）和膨胀（5.26mm OD）微翅片管内的截面尺寸、冷凝传热和压降数据，质量通量为100 ~ 300kg/（m2·s）。研究了质量通量、蒸汽质量和管道膨胀对换热系数和摩擦压力梯度的影响。当质量通量为100kg/（m2·s）时，扩管后R1234ze(E)的传热系数和压降减小。而当质量通量为200和300kg/（m2·s）时，管膨胀对换热系数和压降的影响不显著。此外，根据已有的冷凝换热与压降关系式对实验结果进行了分析。
Despite of the large number of research dedicated to condensation heat transfer and pressure drop characteristics in pristine micro-fin tubes, experimental investigation on effects of tube expansion have not been reported in the open literature. The paper reports measured cross-sectional dimensions, condensation heat transfer and pressure drop data of R1234ze(E) in pristine (5.10mm OD) and expanded (5.26mm OD) micro-fin tubes with mass fluxes from 100 to 300kg/(m2·s). Effects of mass flux, vapor quality and tube expansion on the heat transfer coefficients and friction pressure gradients were investigated in the study. When the mass flux is 100kg/(m2·s), the heat transfer coefficient and pressure drop of R1234ze(E) decrease after tube expansion. However, when the mass fluxes are 200 and 300kg/(m2·s), tube expansion effects on the heat transfer coefficient and pressure drop are not notable. In addition, the experimental results are analyzed based on the existing condensation heat transfer and pressure drop correlations.
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影响因子：
--
作者：
T. Newell;R. Shah
通讯作者：
T. Newell;R. Shah
影响因子：
2.3
作者：
A. Cavallini;D. Col;L. Doretti;G. Longo;L. Rossetto
通讯作者：
A. Cavallini;D. Col;L. Doretti;G. Longo;L. Rossetto
影响因子：
7.3
作者：
Jun-young Choi;M. Kedzierski;P. Domanski
通讯作者：
Jun-young Choi;M. Kedzierski;P. Domanski
DOI：
10.1016/j.ijrefrig.2013.09.035
发表时间：
2014-02
期刊：
International Journal of Refrigeration-revue Internationale Du Froid
影响因子：
--
作者：
Eul-Jong Lee;Nae-Hyun Kim;H. Byun
通讯作者：
Eul-Jong Lee;Nae-Hyun Kim;H. Byun
DOI：
10.1115/ht2013-17111
发表时间：
2013-07
期刊：
--
影响因子：
--
作者：
S. Mehendale
通讯作者：
S. Mehendale