| Title |
Modelling of an Automotive Block Type Thermostatic Expansion Valve |
| Keywords |
블록식 ; 온도감응 팽창밸브 ; 상관식 ; 오리피스 ; 밸브리프트 ; 유량계수 Block type ; TXV ; Correlation ; Orifice ; Valve lift ; Discharge coefficient ; |
| Abstract |
The objective of this study is to propose two empirical correlations to predict the mass flow rate through an automotive block type thermostatic expansion valve and then to evaluate the correlations. The first correlation is deduced by modifying the basic equation of the orifice meter for the mass flow rate and the second correlation is deduced by using the Buckingham’s theorem. The first correlation showed very good agreement on the measured data for R134a, given by Monforte.(5) Average relative deviation and standard deviation of it are 2.5% and 1.6%, respectively. The second correlation agreed on the same measured data with a little greater deviations. The two correlations may apply to common expansion valves which have different geometrical sizes of the same shape. |