Effect of Fin Structure on the Condensation of R-134a, R-1234ze(E), and R-1233zd(E) Outside the Titanium TubesSource: Journal of Heat Transfer:;2020:;volume( 142 ):;issue: 001::page 014502-1Author:Ji, Wen-Tao
,
Mao, Shuai-Feng
,
Chong, Guo-Hun
,
Zhao, Chuang-Yao
,
Zhang, Hu
,
Tao, Wen-Quan
DOI: 10.1115/1.4045139Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In order to test the effect of fin structure on the condensing heat transfer of refrigerants outside the low thermal conductivity tubes, condensation of R-134a, R-1234ze(E), and R-1233zd(E) on two enhanced titanium tubes were experimentally investigated. The two tubes have basically the same fin density while the fin structures are different. One tube is a typical low-fin (two-dimensional, 2D), and the other is a three-dimensional (3D) finned tube. In experiment heat flux was in the range of 10–80 kW·m−2. It was found that at higher heat flux, the condensing heat transfer coefficient (HTC) of 3D-finned tubes was apparently lower than that of 2D-enhanced tubes. The condensing HTC of R-134a for the two tubes was the highest. R-1233zd(E) was the lowest. It was shown from experimental results that the condensing HTC for R-1233zd(E) was notably affected by the change of saturation temperature outside the 3D-enhanced tube, but was less affected by the 2D fin structures.
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contributor author | Ji, Wen-Tao | |
contributor author | Mao, Shuai-Feng | |
contributor author | Chong, Guo-Hun | |
contributor author | Zhao, Chuang-Yao | |
contributor author | Zhang, Hu | |
contributor author | Tao, Wen-Quan | |
date accessioned | 2022-02-04T22:51:00Z | |
date available | 2022-02-04T22:51:00Z | |
date copyright | 1/1/2020 12:00:00 AM | |
date issued | 2020 | |
identifier issn | 0022-1481 | |
identifier other | ht_142_01_014502.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4275565 | |
description abstract | In order to test the effect of fin structure on the condensing heat transfer of refrigerants outside the low thermal conductivity tubes, condensation of R-134a, R-1234ze(E), and R-1233zd(E) on two enhanced titanium tubes were experimentally investigated. The two tubes have basically the same fin density while the fin structures are different. One tube is a typical low-fin (two-dimensional, 2D), and the other is a three-dimensional (3D) finned tube. In experiment heat flux was in the range of 10–80 kW·m−2. It was found that at higher heat flux, the condensing heat transfer coefficient (HTC) of 3D-finned tubes was apparently lower than that of 2D-enhanced tubes. The condensing HTC of R-134a for the two tubes was the highest. R-1233zd(E) was the lowest. It was shown from experimental results that the condensing HTC for R-1233zd(E) was notably affected by the change of saturation temperature outside the 3D-enhanced tube, but was less affected by the 2D fin structures. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Effect of Fin Structure on the Condensation of R-134a, R-1234ze(E), and R-1233zd(E) Outside the Titanium Tubes | |
type | Journal Paper | |
journal volume | 142 | |
journal issue | 1 | |
journal title | Journal of Heat Transfer | |
identifier doi | 10.1115/1.4045139 | |
journal fristpage | 014502-1 | |
journal lastpage | 014502-6 | |
page | 6 | |
tree | Journal of Heat Transfer:;2020:;volume( 142 ):;issue: 001 | |
contenttype | Fulltext |