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외경 9.52mm 평활관 및 미세핀관내 R22와 R410A의 응축열전달 특성
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 Title & Authors
외경 9.52mm 평활관 및 미세핀관내 R22와 R410A의 응축열전달 특성
김만회; 신정섭; 임병한;
 
 Abstract
An experimental investigation of condensation heat transfer in 9.52mm horizontal copper tubes was conducted using R22 and R410A. The test rig had a straight, horizontal test section with an active length of 0.92m and was cooled by the heat transfer fluid(cold water) circulated in a surrounding annulus. Constant heat flux of 11.0kW/m2 was maintained throughout the experiment and refrigerant quality varied from 0.9 to 0.1. The condensation test results at 45℃ were reported for 40∼80 kg/h mass flow rate. The local and average condensation coefficients for seven microfin tubes were presented compared to those for a smooth tube. The average condensation coefficients of R22 and R410A for the microfin tubes were 1.7∼3.19 and 1.7∼2.94 times larger than those in smooth tube, respectively.
 Keywords
Alternative Refrigerant;Air-Conditioner;Condenser;Heat Transfer Coefficient;Condensation;Microfin Tube;
 Language
Korean
 Cited by
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