@inproceedings{3a567a29bd4242c08ef86203f666905f,
title = "Investigating micro-fin and smooth tubes in horizontal two-phase flow boiling using R-1234ze and R-134a refrigerants",
abstract = "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.",
keywords = "Heat transfer coefficients, Micro-fin and smooth tubes, Pressure drop, R-1234ze and R-134a",
author = "Kaggwa Abdul and Chi-Chuan Wang",
year = "2016",
month = jan,
day = "1",
doi = "10.18462/iir.iccc.2016.0014",
language = "English",
series = "Refrigeration Science and Technology",
publisher = "International Institute of Refrigeration",
pages = "104--111",
editor = "Don Cleland and Andrew East and James Carson and Richard Love",
booktitle = "4th IIR International Conference on Sustainability and the Cold Chain, Proceedings",
note = "null ; Conference date: 07-04-2016 Through 09-04-2016",
}