Example 22.3 using steam for emergency power generation Known: Valve Control volume boundary State 2 in the tank,p =5bar, T=400C Steam at Filling adiabatically 15 bar, Turbine V= unsteady 320C 0.6m3 Determine: Initially evacuated ·Ws by the turbine Large vessel tank Assumptions: ·Uniform flow ·△PE,△KE→0 Final state of the stream in the small tank is equilibrium ·Qcv→0 Mass in the turbine and piping is negligible State of steam in the vessel remain constant 上游充通大 Mar/29,Wed,2017 11 SHANGHAI JLAO TONG UNIVERSITYMar/29, Wed, 2017 11 Example 22.3 using steam for emergency power generation Known: • State 2 in the tank, p =5bar, T = 400 ˚C • Filling adiabatically • unsteady Determine: • Ws by the turbine Assumptions: • Uniform flow • ∆PE, ∆KE  0 • QCV0 • State of steam in the vessel remain constant Large vessel • Final state of the stream in the small tank is equilibrium • Mass in the turbine and piping is negligible