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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.
What is the force P to keep the system in equilibrium for the angles specified?
Steam @ 10 MPa, 600 degrees celcius enters the first-stage turbine of an ideal Rankine cycle with reheat. The steam leaving the reheat section of the steam generator is @ 500 degrees celcius
Solve the problem in the image. Do it step wise in detail. This question is from book "Fracture Mechanics - An Introduction - E. Gdoutos Springer (Page 74)"
Weld analysis, Two steel plates are joined with a butt weld using a weld throat h of 3/8 in. and the length of weld 1 of 4in.
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..
While jogging on the beach (it's a warm summer day, about 30 deg C) a high-speed jet flies overhead. You guesstimate it's an altitude of about 3500 m, and count off about 5 s before you hear it. Estimate the speed and Mach number of the jet.
Determine the internal normal force, shear force, and moment at point C in the simply supported beam. Point C is located just to the right of the 1500 couple moment.
Komodo dragons are the largest lizards known to man. A 250-pound dragon can eat enough food to increase it body weight by 1/2. Which number sentence could be used to find w, the weight of a k0modo dragon after increasing it body weight by 1/2?
Determine the temperature of the electric heater element and drawing of the temperature profile.
Estimate the time necessary to achieve the same concentration at a 5.3-mm position for an identical steel and at the same carburizing temperature.
If we have |N|(en) + F - W = 0 Where The unit vector of N is give, F components unknown and W is only -3400 j. What is the first step to solve for an unknown.
a reactor setpoint wasincreased from 160 psig to 190 psig. the reactor pressure transmitter was recalibrated from 0-200 psig to 0-300 psig. what is the percent span for the old and new setpoints?
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