Browsing by Author "Kuo, CS"

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Evaporation of R-22 in a 7-mm microfin tube
(1995)
Kuo, CS
;
Wang, CC
;
Cheng, WY
;
Lu, DC
;
機械工程學系
Horizontal flow boiling of R22 and R407C in a 9.52mm micro-fin tube
(1996-08-01)
Kuo, CS
;
Wang, CC
;
機械工程學系
;
Department of Mechanical Engineering
The two-phase heat transfer coefficient and pressure drop characteristics of refrigerant R22 and R407C (a mixture of R32/R125/R134a, 23%/25%/52%) in a micro-fin tube with nominal diameter 9.52 mm were presented in this study. Experimental data were taken at an evaporation pressure of 600 kPa. The mass flux was between 100 and 300 kg/m(2) . s and the heat fluxes were between 6 and 14 kW/m(2). Experimental data were presented in the form of length-averaged heat transfer coefficients and frictional pressure gradients. The effect of heat flux and mass flux on the heat transfer coefficients were also reported in the present investigation. It is found that the heat transfer coefficients for R407C are considerably lower than R22 (50 similar to 80% less), and the pressure drop of R407C is 30 similar to 50% lower as compared to R22. Copyright (C) 1996 Elsevier Science Ltd
Horizontal flow boiling of R22 and R407C in a 9.52mm micro-fin tube
(1996-08-01)
Kuo, CS
;
Wang, CC
;
機械工程學系
;
Department of Mechanical Engineering
The two-phase heat transfer coefficient and pressure drop characteristics of refrigerant R22 and R407C (a mixture of R32/R125/R134a, 23%/25%/52%) in a micro-fin tube with nominal diameter 9.52 mm were presented in this study. Experimental data were taken at an evaporation pressure of 600 kPa. The mass flux was between 100 and 300 kg/m(2) . s and the heat fluxes were between 6 and 14 kW/m(2). Experimental data were presented in the form of length-averaged heat transfer coefficients and frictional pressure gradients. The effect of heat flux and mass flux on the heat transfer coefficients were also reported in the present investigation. It is found that the heat transfer coefficients for R407C are considerably lower than R22 (50 similar to 80% less), and the pressure drop of R407C is 30 similar to 50% lower as compared to R22. Copyright (C) 1996 Elsevier Science Ltd
In-tube evaporation of HCFC-22 in a 9.52 mm micro-fin/smooth tube
(1996-08-01)
Kuo, CS
;
Wang, CC
;
機械工程學系
;
Department of Mechanical Engineering
Experimental data on evaporation in a 9.52 mm diameter micro-fin tube and a smooth tube with similar tube diameter are presented. The data were taken at two different evaporation temperatures (6 degrees C and 10 degrees C, respectively). The mass flux was between 100 and 300 kg m(-2) s(-1) and the heal fluxes were between 6 and 14 kW m(-2). Data were presented in the form of quasi-local heat transfer coefficients and frictional pressure gradients. The effect of heat flux, mass flux and evaporation pressure on the heat transfer coefficients were also reported in this investigation. Copyright (C) 1996 Elsevier Science Ltd.