Investigating micro-fin and smooth tubes in horizontal two-phase flow boiling using R-1234ze and R-134a refrigerants

Kaggwa Abdul*, Chi-Chuan Wang

*Corresponding author for this work

研究成果: Conference contribution同行評審

摘要

Global warming is becoming a major issue to the environmental perspective of view and one of the several causes is the release of refrigerants to the atmosphere. This research investigates refrigerant R-1234ze that is considered to substitute R-134a. A microfin and smooth tube with 9.5mm outer diameter was used in a twophase flow horizontal convective boiling to study the pressure drop and the enhancement of heat transfer coefficients. The brazed microfin inside a stainless steel tube was heated electrically with current. Thermocouples were inserted in the wall to measure the temperature distribution. The measurements were carried out at saturation temperature of 20°C by varying the refrigerant mass velocity between 50 kg/m2s and 200 kg/m2s, the vapor quality from 0.1 to 0.9, at different heat fluxes. Results from the two refrigerants and tubes were analyzed and compared basing on the values of the two-phase heat transfer coefficient and pressure drop.

原文English
主出版物標題4th IIR International Conference on Sustainability and the Cold Chain, Proceedings
編輯Don Cleland, Andrew East, James Carson, Richard Love
發行者International Institute of Refrigeration
頁面104-111
頁數8
ISBN(電子)9782362150142
DOIs
出版狀態Published - 1 一月 2016
事件4th IIR International Conference on Sustainability and the Cold Chain - Albany, Auckland, New Zealand
持續時間: 7 四月 20169 四月 2016

出版系列

名字Refrigeration Science and Technology
2016-January
ISSN(列印)0151-1637

Conference

Conference4th IIR International Conference on Sustainability and the Cold Chain
國家New Zealand
城市Albany, Auckland
期間7/04/169/04/16

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