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A power plant operates a regenerative Rankine cycle with a reheat, one closed and one open feedwater heater and has a net power output of 1.2 x 109 Btu/hr. When the steam exits the boiler it's temperature is 1000°F and its pressure is 1400psi. At the exit of the first stage of the turbine the pressure has dropped to 500psi where some of the steam is bled off to go to the closed feedwater heater and the remaining steam goes back to the boilers for reheating. The steam is reheated back up to 900°F before entering the second stage of the turbine. . After the second stage turbine some steam is bled off at 120psi to go to the open feedwater heater and the remaining steam passes through the third stage turbine. The condenser operates at 2psi Condensate exits the bottom of the closed feedwater heater as a saturated liquid at 500psi and is trapped back to the open feedwater heater. The working fluid leaves the closed feedwater heater at boiler pressure and a temperature equal to the saturation temperature at 500psi. The turbines and pumps both have and isentropic efficiency of 85%. Determine: a) The specific work of the turbine in Btu/lbm b) The specific work of the pumps in Btu/lbm c) The mass flow rate of steam exiting the boiler in lbm/hr d) The needed rate of heat transfer into the boiler in Btu/hr e) The thermal efficiency of the cycle. m) Draw the T-s diagram for this cycle and label all points MAKING SURE THEY ARE IN THE CORRECT PLACES WITH REGARDS TO PHASE.
The velocity profiles at locations x=0.1, 0.30 and 0.5. Plot contours of u-velocity and v-velocity. How many iterations did it take to get your solution?
Determine distribution of shear force and bending moment
A pitching wedge a golfer is using gives the ball a initial angle of 50 degrees, what range of velocities (Vo) will cause the ball to land within 3 ft of the hole?
The maximum take-off mass of an Airbus A380 passenger jet is about 600 000 kg. The lift is provided by the wings, which have a total area of 845 m2.
An elevator descends from rest with an acceleration of 5 ft>s2 until it achieves a velocity of 15 ft>s. Determine the time required and the distance traveled.
determine (a) the instantaneous center of rotation of the double pulley (b) the velocity of th slider block (c) the number of inches of cord wrapped or unwrapped on each pulley per second.
in a crank or slotted lever quick mechanism the distance between the fixed centre is 150 mm and driving crank is 75 mm. determine the ration of the time taken of cutting & return strake .
Knowing that in the position shown the rod has angular velocity of 4 rad/s clockwise; determine the angular velocity of the rod after it has rotated through a 90°.
the pressure in the vein is known as 1850 Pa. what force must be applied to the plunger, so that 1.5 x 10^-6 m^3 of solution can be injected in 5.0 s?
a 14-ft long ladder leans against a wall with the bottom of the ladder placed 4ft from the base of the wall. how high on the wall will the ladder reach.
determine the designe power. An output speed of 175 RPMis specified. Determine: a) number of teeth on the small sprocket, b) number of teeth on the large sprocket, c) lubrication type required, d) the required length of chain (in inches) if the ce..
Diffusion Coeffiecient, Calculate Constant, The diffusion coeffiecient for Cr^+3 in Cr2O3 is 6x10^-15 cm2/s at 727 degrees Celcius and is 1x10^-9 cm2/s at 1400 degrees Celcius.
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