The feed to a compressor is superheated steam at 300°C and 20 bar abso- lute pressure. It enters the compressor at a velocity of 20 m/s. The pipe inlet inside diameter is 0.10 m. The discharging pipe, after the compres- sor, has a smaller inside diameter and the discharge velocity is 170 m/s. The exit of the compressor is superheated steam at 350°C and 60 bar absolute. Heat loss from the compressor to the surroundings is 5 kW. Determine the compressor horsepower.

Question 2 A water pump driven by an 800 W electric motor is used to pump water from the ground level to a tank at the rate of 20000 L/hour. Water is being discharged into the tank at 10 meters above the ground; this is the maximum rise this pump can achieve. The water and the ambient temperatures are both 10 °C. The inlet and outlet pipe diameters for the pump are both 8 cm, respectively. Determine: (1)/ The average inlet linear flow velocity of the water; 2) Assuming the efficiency of the electric motor is 95%, calculate the efficieney-of the motor-pump unit; 3) The pressure difference between the inlet and the outlet of the pump.

How much work must be input by the paddle wheel below to raise the piston 5 cm. The initial temperature is 100°F.

5. A steady-flow water power plant has the following inlet and outlet conditions: Inlet 0 75 400 70.0 Outet 0 0 50 70.1 Pressure, psig Elevation, ft Velocity, ft/s Temperature °F The plant is adiabatic. How much work does it deliver per lbm of fluid flowing through?

A gas turbine power plant with the following specifications: two axial compressor stages, the pressure ratio is 6/1 for each compressor. The inlet and exit angles of both moving and fixed blades are 40° and 20° respectively, the work done factor is 0.82, six stages for each compressor. intercooling between stages. A high pressure turbine is used to drive the compressors, and a low pressure turbine drives the generator. The temperature of the gases at entry to the high pressure turbine is 600°C and the gases are reheated to 700°C after expansion in the first turbine. The exhaust gases leaving the low pressure turbine are passed through a heat exchanger to heat the air leaving the high pressure stage compressor. The air inlet temperature to the unit is 20°C. The isentropic efficiency of each turbine stage is 0.95; the heat exchanger thermal ratio is 0.7. A mechanical loss is 5% for both the generator- turbine shaft and the compressor- turbine shaft. Assume any missed values to Calculate…

Air at 150 kPa and 25°C is transported through a 2-inch Schedule 40 commercial steel pipe. Consider that the air behaves as an ideal gas, that the flow is adiabatic and that the Mach number under these conditions of pressure and temperature is 0.35. Calculate the length of the pipe when the air pressure and temperature decrease to 54.375 kPa and -10.6°C.