International Review Of Mechanical Engineering IREME

Ethirajan, Rathakrishnan (2018) International Review Of Mechanical Engineering IREME. Perpustakaan Politeknik Penerbangan Surabaya, 12 (10). pp. 807-868. ISSN -

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Abstract

Abstract — This study conducts an experimental investigation to determine the condensation heat transfer characteristics of hydrofluoroolefin R12341f and R134a on hori:ontal smooth and finned tubes. The experiments are conducted at a saturation temperature of 39°C with variable water cooling temperatures and velocities. Additionally, the effects of different fin geometries are investigated. The predicted condensation heat transfer coefficients on the smooth tube are lower than the experimental coefficients by 2.8-14.2% for R134a and 13.8-20.7% forR123411 The experimental results demonstrate that the heat flux increases with a decrease in the fin height or an increase in the fin pitch and thickness. Additionally, the heat flux increases as the water velocity increases or the water inlet temperature decreases. The results also show that the tube with the largest fin pitch, largest fill thickness, and smallest flu height provides the highest condensation heat flux. The condensation heat transfer coefficients of R123411 are slightly higher than those of R134a for all of the experiments. Thus, this studs' concludes that R1234if is a potentially environmentally friendly alternative to R134a for condensation heat transfer applications

Item Type:	Article
Uncontrolled Keywords:	R134a Condensation, R1234vf Condensation, R134a Alternatives, R1234.1f, Horizontal Finned Tubes
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Politeknik Penerbangan
Depositing User:	Mr Perpustakaan Poltekbang Surabaya
Date Deposited:	27 Jan 2021 02:42
Last Modified:	27 Jan 2021 02:42
URI:	http://repo.poltekbangsby.ac.id/id/eprint/70

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