Solution a single stream of air T1=21C P=5 bars 2 Inlet T3=79C For the device to operate as claimed, Hot outlet Mass conservation,Energy conservation (1st law), And 2nd law must be satisfied!! Cold outlet T3=-18C P3=I bar given m3 =0.6rm 60%mass Mass balance: m1=im☑2+im3------>m2=0.4m1 Energy balance: 0=m1h1-i2h2-m3h3 --> 0=(ri rits)h -rih2 -rish3 rin(h-h2)+ris(h-h3) = 0.4i1c(T1-T2】+0.6imc(T1-T3) Mass,and 1st law satisfied!!! =0.4(-105)+0.6(70) =0 上游充通大 April 26,2018 11 SHANGHAI JLAO TONG UNIVERSITYApril 26, 2018 11 Solution a single stream of air 60% mass For the device to operate as claimed, Mass conservation, Energy conservation (1st law), And 2nd law must be satisfied!! Mass balance: Energy balance: given Mass, and 1st law satisfied!!!