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Analysis of a Wet Surface Finned-tube Evaporator of an Air Source Heat Pump  

Baik, Young-Jin (Thermal/Fluids Control Research Center, Korea Institute of Science and Technology)
Chang, Young-Soo (Thermal/Fluids Control Research Center, Korea Institute of Science and Technology)
Kim, Young-Il (Thermal/Fluids Control Research Center, Korea Institute of Science and Technology)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.10, no.4, 2002 , pp. 211-219 More about this Journal
Abstract
In this study, in-situ performance test of a wet surface finned-tube evaporator of an air source heat pump which has a rating capacity of 20 RT is carried out. Since test conditions, such as indoor and outdoor air conditions cannot be controlled to satisfy the standard test conditions, experiments are done with the inlet air conditions as they exist. From the experimental data, air side heat and mass transfer coefficients were calculated by the well known heat and mass transfer analogy and tube-by-tube method. Since current procedure underpredicted the experimental sensible heat factor (SHF), a proper empirical parameter was introduced to predict the experimental data with satisfactory results. This study provides the method of evaluating the heat and mass transfer coefficients of a wet surface finned-tube evaporator of which in-situ performance test is necessary.
Keywords
Heat and mass transfer; Finned-tube; Evaporator; Wet surface; Heat pump;
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