Air approaches a turbine at a constant pressure of 2 MPa and a temperature of 400°C at a velocity of 200 m/s and leaves at a pressure of 100 kPa and a temperature of 200°C at a velocity of 50 m/s. Heat is lost from the turbine at a pace of 1500 kJ/min. The inner diameter of the turbine inlet pipe is 20 cm. Ignore the possibility of energy transitions. Air arc properties C 1.1 kJ/kg. K, C, -718J/kg, K, R-287J/kg, K. Determine: a) The mass flow velocity of the turbine's air b) The diameter of the turbine's exhaust pipe in centimetres (cm) c) The turbine's power output in megawatts (MW). APPROACH

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Air approaches a turbine at a constant pressure of 2 MPa and a temperature of 400°C at a velocity of 200 m/s and leaves at a pressure of 100 kPa and a temperature of 200°C at a velocity of 50 m/s. Heat is lost from the turbine at a pace of 1500 kJ/min. The inner diameter of the turbine inlet pipe is 20 cm. Ignore the possibility of energy transitions. Air arc properties C 1.1 kJ/kg. K, C, -718J/kg, K, R-287J/kg, K.

Determine:

a) The mass flow velocity of the turbine's air
b) The diameter of the turbine's exhaust pipe in centimetres (cm) c) The turbine's power output in megawatts (MW). APPROACH

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