Characteristics of evaporation heat transfer and flow pattern of pure refrigerant HFC134a in a horizontal capillary tube

Ken Kuwahara; Shigeru Koyama; Yoshitaka Hashimoto

doi:10.1299/jsmeb.43.640

Characteristics of evaporation heat transfer and flow pattern of pure refrigerant HFC134a in a horizontal capillary tube

Ken Kuwahara, Shigeru Koyama, Yoshitaka Hashimoto

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8 Citations (Scopus)

Abstract

In the present study, the characteristics of heat transfer and flow pattern are investigated experimentally for evaporation of pure refrigerant HFC134a in capillary tubes of 2.0 and 0.84 mm I.D. The test section consists of a heating stainless steel tube section and a glass-tube section, which is located at the right after the outlet of the heating section. The experiments were carried out in the ranges of mass velocity of 100 to approximately 600 kg/m²s and heat flux of 1.16 to approximately 46.8 kW/m² at a constant inlet pressure of about 920 kPa. Experimental results of local heat transfer coefficient, pressure drop and flow pattern were compared with previous studies.

Original language	English
Pages (from-to)	640-646
Number of pages	7
Journal	JSME International Journal, Series B: Fluids and Thermal Engineering
Volume	43
Issue number	4
DOIs	https://doi.org/10.1299/jsmeb.43.640
Publication status	Published - Nov 2000

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Physical and Theoretical Chemistry
Fluid Flow and Transfer Processes

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abstract = "In the present study, the characteristics of heat transfer and flow pattern are investigated experimentally for evaporation of pure refrigerant HFC134a in capillary tubes of 2.0 and 0.84 mm I.D. The test section consists of a heating stainless steel tube section and a glass-tube section, which is located at the right after the outlet of the heating section. The experiments were carried out in the ranges of mass velocity of 100 to approximately 600 kg/m2s and heat flux of 1.16 to approximately 46.8 kW/m2 at a constant inlet pressure of about 920 kPa. Experimental results of local heat transfer coefficient, pressure drop and flow pattern were compared with previous studies.",

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AU - Hashimoto, Yoshitaka

PY - 2000/11

Y1 - 2000/11

N2 - In the present study, the characteristics of heat transfer and flow pattern are investigated experimentally for evaporation of pure refrigerant HFC134a in capillary tubes of 2.0 and 0.84 mm I.D. The test section consists of a heating stainless steel tube section and a glass-tube section, which is located at the right after the outlet of the heating section. The experiments were carried out in the ranges of mass velocity of 100 to approximately 600 kg/m2s and heat flux of 1.16 to approximately 46.8 kW/m2 at a constant inlet pressure of about 920 kPa. Experimental results of local heat transfer coefficient, pressure drop and flow pattern were compared with previous studies.

AB - In the present study, the characteristics of heat transfer and flow pattern are investigated experimentally for evaporation of pure refrigerant HFC134a in capillary tubes of 2.0 and 0.84 mm I.D. The test section consists of a heating stainless steel tube section and a glass-tube section, which is located at the right after the outlet of the heating section. The experiments were carried out in the ranges of mass velocity of 100 to approximately 600 kg/m2s and heat flux of 1.16 to approximately 46.8 kW/m2 at a constant inlet pressure of about 920 kPa. Experimental results of local heat transfer coefficient, pressure drop and flow pattern were compared with previous studies.

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Characteristics of evaporation heat transfer and flow pattern of pure refrigerant HFC134a in a horizontal capillary tube

Abstract

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