Water vapor enters the turbine at a pressure of 6 MPa, a mass flow of 400 kg/s and a temperature of 500 °C. It leaves the turbine as 8 kPa saturated steam. The heat transfer from the turbine to the environment is 180 °C at an average surface temperature of 8 MW. The kinetic and potential energy effects are negligible. a) Calculate the power and exergy dissipation in MW for a control volume surrounding the turbine. b) If the turbine is located in a facility where the ambient temperature is 27 °C, determine the exergy destruction for an enlarged control volume containing the turbine and its immediate surroundings. dead state; T0=300 K, P0=100 kPa

Water vapor enters the turbine at a pressure of 6 MPa, a mass flow of 400 kg/s and a temperature of 500 °C. It leaves the turbine as 8 kPa saturated steam. The heat transfer from the turbine to the environment is 180 °C at an average surface temperature of 8 MW. The kinetic and potential energy effects are negligible. a) Calculate the power and exergy dissipation in MW for a control volume surrounding the turbine. b) If the turbine is located in a facility where the ambient temperature is 27 °C, determine the exergy destruction for an enlarged control volume containing the turbine and its immediate surroundings. dead state; T0=300 K, P0=100 kPa