Open AccessExperimental heat transfer coefficient during condensation of R-410A in horizontal micro-fin tubes
Author(s) -
Sudhir Singh,
Rajeev Kukreja
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1240/1/012052
Subject(s) - thermodynamics , heat transfer coefficient , fin , condensation , materials science , refrigerant , heat transfer , mechanics , heat exchanger , physics , composite material
Condensation heat transfer coefficient has been calculated experimentally in microfin tubes of outer diameter 9.52mm with helix angles 15° and 18°. Condensation of refrigerant R-410A include mass fluxes from 200 to 600 kg/m 2 s, vapour qualities between 0.1 to 0.9 and saturation temperature at 35 °C and 40°C. The experimental results indicate that the average heat transfer coefficients of R-410A in micro-fin (MF) tubes were increased 1.15-1.47 times larger than those of smooth tube (ST). The experimental results are compared with the existing correlations of heat transfer coefficient proposed by other authors. The comparison indicated good agreement with these existing correlations within ±30%. A correlation has also been developed for predicting condensation heat transfer coefficient in micro-fin tubes.