Solution Indoor return air Supply air T5=20C T6=50C P5=1 bar 5 P6=1 bar 6 > (AV)5=0.42m3/s W 2 P2 14 bar P3 =14 bar Condenser T2=75C T3=28C 0=is,g)+s3=5+md R22 2? Entropy change of the air (ideal gas) s-5s-Calnte-Rin Ps -(mk)n()-Rn =0.098kJ/kg·K Gcond rirer(S3-S2)+rilair(S6-S5) -[【（aum号）o296-aa2sgk+asa网]l =7.95X10-4k 上游充通大 April 26,2018 17 SHANGHAI JIAO TONG UNIVERSITYApril 26, 2018 17 Solution ?? Entropy change of the air (ideal gas) R22