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Mass Flow Characteristics and Empirical Modeling of R22 Flowing through Electronic Expansion Valves  

Park, Cha-Sik (Graduate School of Mechanical Engineering, Korea University)
Lee, Sun-Il (Graduate School of Mechanical Engineering, Korea University)
Kim, Yong-Chan (Department of Mechanical Engineering, Korea University)
Lee, Young-Soo (Korea Institute of Energy Research)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.18, no.11, 2006 , pp. 881-887 More about this Journal
Abstract
The objective of this study are to analyze the flow characteristics of R22 flowing through EEVs and to develop an empirical correlation to predict the refrigerant flow rate. The mass flow rates of EEVs with different geometries were measured at various condensing temperatures, subcoolings, and EEV openings. Based on the experimental data, an empirical correlation for mass flow predictions in EEVs was developed by modifying the orifice equation. The correlation showed good agreement with the measured data for R22 with average and standard deviations of 1.4% and 6.1%, respectively. Approximately 90% of the measured data were within ${\pm}10%$ of the predictions.
Keywords
EEV; Mass flow rate; Correlation; Orifice; Dimensionless parameters; EEV opening;
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