MAE 204 Lecture Notes - Lecture 18: Specific Volume, Isentropic Process, Ideal Gas

• School: University at Buffalo
• Department: Mechanical & Aerospace Engr
• Course: MAE 204
• Professor: Salac David

Document Summary

Is it possible for water in a closed system to produce 9000kj/kg of work by expanding from. Assume all heat loss is at a surface at 600c. S2-s1 = 9/(tb) + s gen =-- sgen = s2 - s1 - qin/tb. S1 = 7. 1668 kjkg k u1 = 3780. 2kj/kg. S2 = 7. 1246 kj/kg k u2 = 2793. 7 kj/kg e2 - e1 = qin -wout u2 -u1 = qin - wout find qin and use qin to find s gen. An isotropic process is one where s2- s1 = 0 look at s2 -s1 = q/ t + min sin - moutsout +sgen. = 0 you could lget s2-s1 = 0 by. Sgen = moutsout - minsin - 1 to 2 q/ t not likely another way is to assume reversivle then if. 1 to 2 q/ t = moutsout -minsin not likely.