Turbine
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Transcript of Turbine
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Turbine
Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 10 Mpa, 450oC and 80 m/s. The exit conditions are 10 kPa, 92 % quality and 50 m/s. The mass flow rate of steam is 12 kg/s. Determine:
a. power outputb. the turbine inlet area
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Compressor
Helium is compressed from 120 kPa and 310 K to 700 kPa and 430 K. Heat loss of 20 kJ/kg occurs during the process. Neglecting kinetic energy changes, determine the power input required for a flow rate of 90 kg/min.
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Nozzle
Air enters a nozzle at 300 kPa, 200oC and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area is 80 cm2. Determine:
a. the mass flow rate through the nozzle
b. the exit temperature of the airc. the exit area of the nozzle
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Throttle/Expansion Valve
R134a enters an expansion valve as saturated liquid at 1.2 Mpa and it is expanded adiabatically to 120 kPa. What is the temperature change across the valve?
How would the result change if an ideal gas were used as the working fluid?
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Mixing Chamber
A person takes a shower using hot water (from “tanked” hot water heater) at 65oC and cold water at 15oC. The total flow rate is 2.5 gallons per minute and the shower temperature is 45oC. Determine the volumetric flow rates of hot and cold water, in gallons per minute.
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The Shower Continued
As the shower continues, the temperature of the water coming out of the showerhead steadily decreases, even though the hot and cold water flow rates remain constant. Explain what is happening and include a diagram.
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Mixing Chamber
A person takes a shower using saturated water vapor at 100oC and cold water at 15oC. The total flow rate is 2.5 gallons per minute and the shower temperature is 45oC. Determine the volumetric flow rates of hot and cold water, in gallons per minute.