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25 Superheated steam at 20 MPa, 560 degree C enters the turbine of a vapor power plant. The pressure at the exit of the turbine is 0.5 bar, and liquid leaves the condenser at 0.4 bar at 75 degree C. The pressure is increased to 20.1 MPa across the pump. The turbine and pump have isentropic efficiencies of 81 and 85%, respectively. Cooling water enters the condenser at 20 degree C with a mass flow rate of 70.7 kg/s and exits the condenser at 38 degree C. For the cycle, determine (a) the mass flow rate of steam, in kg/s. (b) the thermal efficiency.
consider a carnot cycle for water in a piston-cylinder device. the mass of the water is 1.5 kg. during the isothermal
1 a car with a projected frontal area of 1.8 m2 is traveling at 136 kph. if the drag coefficient of the car is 0.45 and
What is the inner tube surface temperature at the outlet, where fully developed conditions may be assumed?
air with a static temperature of 223 k entering a gas turbine engine intake at v1300ms accelerates to a new velocity vx
air is compressed in a variable-load piston-cylinder device equipped with a paddle wheel. initially air is at 500kpa
a 0.5-m3 vessel contains 10 kg of refrigerant-134a at -20oc. determine a the pressure b the total internal energy and c
determine the largest intesity w0 of the distributed load that the beam can support if the beam can withstand a maximum
the following table lists temperatures and specific volumes of ammonia vapor at two pressures p 50 psi
Electricity might be used to run the fan to draw air through the system, and also to run a chiller - What is a typical COP for a commercial chiller?
the minto wheel is a power-producing device activated by evaporating and condensing a working substance. the only
The rigid gate, is hinged at O and rests against a rigid support at B. What minimum horizontal force, P, is required to hold the gate closed if its width is 3.9 m? Neglect the weight of the gate and friction in the hinge. The back of the gate is e..
one end of a tube is closed and the other is open. a 15 g projectile is placed near the closed end is fastened in place
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