1. Superheated stream enters a turbine at 7 MPa, 350 °C, and a mass flow rate of 5000 kg/h. Stream leaves the turbine at 7 bar and a quality of 88 %. The heat loss from the turbine is 13 kW. (a) Calculate the rate of shaft work developed by the turbine. (b) Draw a T-v diagram showing the process path. Please specify at least two properties at the entrance (P1, v1, T1, or h1) and the exit (P2, v2, T2, h2 or x2) of the turbine.
1. Superheated stream enters a turbine at 7 MPa, 350 °C, and a mass flow rate of
5000 kg/h. Stream leaves the turbine at 7 bar and a quality of 88 %. The heat
loss from the turbine is 13 kW.
(a) Calculate the rate of shaft work developed by the turbine.
(b) Draw a T-v diagram showing the process path. Please specify at least two
properties at the entrance (P1, v1, T1, or h1) and the exit (P2, v2, T2, h2 or
x2) of the turbine.
2. Air flows through an electrical heater as shown in the figure. The volumetric flow
rate is 150 m3
/min. The inlet condition is 100 kPa and 17 °C and the air leaves
the heater at 100 kPa. The electrical heater consumes 15 kW and has heat loss
200 W. Determine the exit temperature of the air.
3. Determine the amount of power produced or consumed by the steady flow device
in the figure below. The medium is air.
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