2013-3-6 Actual Vapor-Compression Cycle State 1 2s 234 hu回2413522.39280.1591.4991.49 %-低园，- 巾。/m (h-h) %=27239-2413kg- (280.15-241.35kJkg 0.8=80% p-Diagram The pressure-enthalpy(p-/)diagram is a thermodynamic property diagram commonly used in the refrigeration field. ant Co Condense /2s2 Evaporato 9 2013-3-6 9 Actual Vapor-Compression Cycle (d) The isentropic compressor ( ) ( ) ( ) / / 2 1 2 1 c c s c h h h h W m W m s − − = = & & & & η = − − = (280.15 241.35)kJ/kg (272.39 241.35)kJ/kg ηc 0.8 = 80% State h (kJ/kg) 1 241.35 2s 272.39 2 280.15 3 91.49 4 91.49 efficiency is p-h Diagram ►The pressure-enthalpy (p-h) diagram is a thermodynamic property diagram commonly used in the refrigeration field