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http://dx.doi.org/10.5916/jkosme.2007.31.6.715

Experimental study for the pressure drop of R-22 and R-4O7C during the condensation in the micro-fin tubes  

Roh, Geon-Sang (동명대학교 환경설비공학과)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.31, no.6, 2007 , pp. 715-722 More about this Journal
Abstract
Experiments were conducted for the investigation of pressure drop inside horizontal micro-fin tubes during the condensation of R-22 and ternary refrigerant. R-407C(HFC-32/125/134a 23/25/62 wt%) as a substitute of R-22. The condenser is a double-tube and counterflow type heat exchanger which is consisted with micro-fin tubes having 60 fins with a length of 4000mm, outer diameter of 9.53mm and fin height of 0.2mm. The mass velocity varied from 102.1 to $301.0kg/(m^2{\cdot}s)$ and inlet quality was fixed as 1.0. From the experimental results. the pressure drop for R-407C was considerably higher than that for R-22. The value of PF(penalty factor) for both of refrigerants was not bigger than the ratio of micro-fin tube area to smooth tube area. Based on the experimental data. correlation was Proposed for the prediction of frictional pressure drop during the condensation of R-22 and R-407C inside horizontal micro-fin tubes.
Keywords
Pressure drop; R-407C; Micro-fin tube; Penalty Factor; Condensation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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