Solution Continue Process 3-4: V二UV Ud=08V3 V =2.776(8)=22.21 Table A-17 for air V4→T4=1043K,u4=795.8k/kg -今a=n会ubm( EoS Ta 1043K 300K 3.48 bars (b)The thermal efficiency is 7=1- Oa/m =1- 4-1 v=const. Q23/m U3一2 795.8-214.07 r=8;k=1.4 v=const. =1- 0.51(51%) 1678.7-491.2 1h=0.56 May15,2018 20May 15, 2018 20 Process 3‐4: S EoS Solution Continue vr4  T 4=1043K, u 4=795.8 kJ/kg Table A‐17 for air V4=V1  (b) The thermal efficiency is th k 1 1 1 r    r = 8; k=1.4 ηth= 0.56