Experiments on two-phase flow of R1234ze(E), R134a and R32 in horizontal mini-channels

Daisuke Jige; Yuta Komiya; Hongcheng Zhang; Chieko Kondou; Shigeru Koyama

Experiments on two-phase flow of R1234ze(E), R134a and R32 in horizontal mini-channels

Daisuke Jige, Yuta Komiya, Hongcheng Zhang, Chieko Kondou, Shigeru Koyama

Research output: Contribution to conference › Paper › peer-review

Abstract

In this study, the adiabatic pressure drop and flow boiling heat transfer characteristics of R1234ze(E), R134a and R32 in horizontal multi-port mini-channels are experimentally investigated. Experiments were carried out with aluminum rectangular-channel tubes of 0.43 mm and 1.31 mm in average hydraulic diameters, as well as with a circular-channel tube of 0.52 mm in the hydraulic diameter, at a saturation temperature of 288 K in mass velocity range from 100 to 400 kg m^-2s^-1 and heat flux range from 5 to 20 kW m^-2. The existing correlations and experimentally determined heat transfer coefficient satisfactorily agreed for the rectangular channel of 1.31 mm and the circular channel of 0.52mm, however deviates for the rectangular tube of 0.43 mm. This comparison result indicates the significant effect of heat transfer contribution by the thin-liquid-film evaporation.

Original language	English
Publication status	Published - 2014
Event	7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014 - Jeju Island, Korea, Republic of Duration: May 18 2014 → May 21 2014

Other

Other	7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014
Country/Territory	Korea, Republic of
City	Jeju Island
Period	5/18/14 → 5/21/14

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering
Condensed Matter Physics
Control and Systems Engineering
Mechanical Engineering

Cite this

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title = "Experiments on two-phase flow of R1234ze(E), R134a and R32 in horizontal mini-channels",

abstract = "In this study, the adiabatic pressure drop and flow boiling heat transfer characteristics of R1234ze(E), R134a and R32 in horizontal multi-port mini-channels are experimentally investigated. Experiments were carried out with aluminum rectangular-channel tubes of 0.43 mm and 1.31 mm in average hydraulic diameters, as well as with a circular-channel tube of 0.52 mm in the hydraulic diameter, at a saturation temperature of 288 K in mass velocity range from 100 to 400 kg m-2s-1 and heat flux range from 5 to 20 kW m-2. The existing correlations and experimentally determined heat transfer coefficient satisfactorily agreed for the rectangular channel of 1.31 mm and the circular channel of 0.52mm, however deviates for the rectangular tube of 0.43 mm. This comparison result indicates the significant effect of heat transfer contribution by the thin-liquid-film evaporation.",

author = "Daisuke Jige and Yuta Komiya and Hongcheng Zhang and Chieko Kondou and Shigeru Koyama",

year = "2014",

language = "English",

note = "7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014 ; Conference date: 18-05-2014 Through 21-05-2014",

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TY - CONF

T1 - Experiments on two-phase flow of R1234ze(E), R134a and R32 in horizontal mini-channels

AU - Jige, Daisuke

AU - Komiya, Yuta

AU - Zhang, Hongcheng

AU - Kondou, Chieko

AU - Koyama, Shigeru

PY - 2014

Y1 - 2014

N2 - In this study, the adiabatic pressure drop and flow boiling heat transfer characteristics of R1234ze(E), R134a and R32 in horizontal multi-port mini-channels are experimentally investigated. Experiments were carried out with aluminum rectangular-channel tubes of 0.43 mm and 1.31 mm in average hydraulic diameters, as well as with a circular-channel tube of 0.52 mm in the hydraulic diameter, at a saturation temperature of 288 K in mass velocity range from 100 to 400 kg m-2s-1 and heat flux range from 5 to 20 kW m-2. The existing correlations and experimentally determined heat transfer coefficient satisfactorily agreed for the rectangular channel of 1.31 mm and the circular channel of 0.52mm, however deviates for the rectangular tube of 0.43 mm. This comparison result indicates the significant effect of heat transfer contribution by the thin-liquid-film evaporation.

AB - In this study, the adiabatic pressure drop and flow boiling heat transfer characteristics of R1234ze(E), R134a and R32 in horizontal multi-port mini-channels are experimentally investigated. Experiments were carried out with aluminum rectangular-channel tubes of 0.43 mm and 1.31 mm in average hydraulic diameters, as well as with a circular-channel tube of 0.52 mm in the hydraulic diameter, at a saturation temperature of 288 K in mass velocity range from 100 to 400 kg m-2s-1 and heat flux range from 5 to 20 kW m-2. The existing correlations and experimentally determined heat transfer coefficient satisfactorily agreed for the rectangular channel of 1.31 mm and the circular channel of 0.52mm, however deviates for the rectangular tube of 0.43 mm. This comparison result indicates the significant effect of heat transfer contribution by the thin-liquid-film evaporation.

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M3 - Paper

AN - SCOPUS:84928139934

T2 - 7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014

Y2 - 18 May 2014 through 21 May 2014

ER -

Experiments on two-phase flow of R1234ze(E), R134a and R32 in horizontal mini-channels

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