Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes

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,...

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Autores principales:	Na Liu, Qian Zhao, Zhixiang Lan
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	micro-fin tube tube expansion condensation heat transfer pressure drop General Works A
Acceso en línea:	https://doaj.org/article/3be7f3e0435a489895b747615601588b
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spelling	oai:doaj.org-article:3be7f3e0435a489895b747615601588b2021-12-02T10:18:35ZEffect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes2296-598X10.3389/fenrg.2021.811054https://doaj.org/article/3be7f3e0435a489895b747615601588b2021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fenrg.2021.811054/fullhttps://doaj.org/toc/2296-598XDespite 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 (5.10 mm OD) and expanded (5.26 mm OD) micro-fin tubes with mass fluxes from 100 to 300 kg/(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 100 kg/(m2·s), the heat transfer coefficient and pressure drop of R1234ze(E) decrease after tube expansion. However, when the mass fluxes are 200 and 300 kg/(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.Na LiuQian ZhaoZhixiang LanFrontiers Media S.A.articlemicro-fin tubetube expansioncondensationheat transferpressure dropGeneral WorksAENFrontiers in Energy Research, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	micro-fin tube tube expansion condensation heat transfer pressure drop General Works A
spellingShingle	micro-fin tube tube expansion condensation heat transfer pressure drop General Works A Na Liu Qian Zhao Zhixiang Lan Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes
description	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 (5.10 mm OD) and expanded (5.26 mm OD) micro-fin tubes with mass fluxes from 100 to 300 kg/(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 100 kg/(m2·s), the heat transfer coefficient and pressure drop of R1234ze(E) decrease after tube expansion. However, when the mass fluxes are 200 and 300 kg/(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.
format	article
author	Na Liu Qian Zhao Zhixiang Lan
author_facet	Na Liu Qian Zhao Zhixiang Lan
author_sort	Na Liu
title	Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes
title_short	Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes
title_full	Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes
title_fullStr	Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes
title_full_unstemmed	Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes
title_sort	effect of tube expansion on heat transfer and pressure drop characteristics during condensation in micro-fin tubes
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/3be7f3e0435a489895b747615601588b
work_keys_str_mv	AT naliu effectoftubeexpansiononheattransferandpressuredropcharacteristicsduringcondensationinmicrofintubes AT qianzhao effectoftubeexpansiononheattransferandpressuredropcharacteristicsduringcondensationinmicrofintubes AT zhixianglan effectoftubeexpansiononheattransferandpressuredropcharacteristicsduringcondensationinmicrofintubes
_version_	1718397401868271616

Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes

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