Using Exergetic Efficiencies Figure P7.113 shows a turbine operating at ste...

Using Exergetic Efficiencies

Figure P7.113 shows a turbine operating at steady state with steam entering at p₁ = 30 bar, T₁ = 350^oC and a mass flow rate of 30 kg/s. Process steam is extracted at p₂ = 5 bar, T₂ = 200^oC. The remaining steam exits at p₃ = 0.15 bar, x₃ = 90%, and a mass flow rate of 25 kg/s. Stray heat transfer and the effects of motion and gravity are negligible. Let T₀ = 25^oC, p₀ = 1 bar. The accompanying table provides property data at key states. For the turbine, determine the power developed and rate of exergy destruction, each in MW. Also devise and evaluate an exergetic efficiency for the turbine.