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Steam with specific enthalpy (h) 3214 kJ/kg enters an adiabatic turbine operating at steady state with a flow rate 10 kg/s. As it expands, at a point where his 2920 kJ/kg, 1.5 kg/s is extracted for heating purposes. The remaining 8.5 kg/s further expands to the turbine exit, where h = 2374 kJ/kg. Neglecting changes in kinetic and potential energies, the net power output (in kW) of the turbine is_____.
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- 65581 kW
- 7589 kW
- 7581 kW
- 7500 kW
Correct Option: C
ẇ = ṁtot(h1 - h2) + (ṁtot - ṁout)(h2 - h3)
ẇ = 10(3214 – 2920) + 8.5(2920 – 2374)
ẇ = 7581 kW