Solution cont. Summarize the entropy production/irreversiblity Component Gev (kW/K) Fluid friction,mechanical 17.5×104-7 friction,internal heat trans. compressor valve 9.94104Fluid friction (throttling expansion) condenser 79510Heat transfer (AT) Indoor return air Supply air T5=20C T6=50C P5=1 bar 5 6 po=1 bar (AV)5=0.42m3s - 3 P2 =14 bar P3=14 bar Condenser T2=75C T3=28C Expansion Compressor valve P4=3.5 bar T1=-5C 4 P1=3.5 bar Outdoor air 上方 Evaporator 2018 20 SHANGH/April 26, 2018 20 Solution cont. Summarize the entropy production/irreversiblity Fluid friction, mechanical friction, internal heat trans. Fluid friction (throttling expansion) Heat transfer (∆T)