Condensation Heat Transfer Characteristics and Pressure Drop of R-290, R-600a, and R-22 in Horizontal Smooth Pipes with a Small Diameter 


Vol. 14,  No. 1, pp. 53-60, Mar.  2008


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  Abstract

The condensation heat transfer coefficients and pressure drops of hydrocarbon refrigerants (R-290 and R-600a) and hydrochlorofluorocarbon (HCFC) refrigerants were measured in the two horizontal double pipe heat exchangers with inner diameters of 10.07 mm and 5.80 mm at a mass flux of 35.5~210.4 kg/m2s and the condensation temperature of 40 ℃. The average condensation heat transfer coefficients of hydrocarbon refrigerants were higher than that of HCFC refrigerant(R-22). The pressure drop had a magnitude in the order of R-600a > R-290 > R-22. The pressure drops in the tubes with inner diameter of 10.07 mm were approximately 6~15%, 9.8~12.5% and 2.1~4.6% higher for R-600a, R-290 and R-22, respectively, than those with inner diameter of 5.80 mm. The condensation heat transfer coefficients were compared with the published experimental data, and showed the best agreement with Haraguchi et al.'s correlation.

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  Cite this article

[IEEE Style]

R. GS and S. CH, "Condensation Heat Transfer Characteristics and Pressure Drop of R-290, R-600a, and R-22 in Horizontal Smooth Pipes with a Small Diameter," Clean Technology, vol. 14, no. 1, pp. 53-60, 2008. DOI: .

[ACM Style]

Roh GS and Son CH. 2008. Condensation Heat Transfer Characteristics and Pressure Drop of R-290, R-600a, and R-22 in Horizontal Smooth Pipes with a Small Diameter. Clean Technology, 14, 1, (2008), 53-60. DOI: .

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