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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.
determine the angle of twist of the end B of the solid section relative to end C. The tubes have an outer diameter of 30 mm and an inner diameter of 20 mm. The solid section has a diameter of 40 mm.
(a) Draw and label a schematic of the system. (b) Determine the mass flow rate (kg/s) of water vapor neededand (c) the rate of exergy destruction (kW)
Twenty-five samples of steel beam were chosen and tested for Young's Modulus. Eight had a modulus of E = 30 x 10^6 psi. Two had a modulus of E = 29 x 10^6 psi. Fifteen had a modulus of E = 30. x 1-^6 psi.
A small hoist is mounted on the back of a pickup truck and is used to lift a 500N crate . Determine the force exerted on the hoist by the htdraulic cylinder BC, the reaction at A.
Design of absorption column and the cooler. Process design of other units should be completed along with pipe sizes.
Male an Isometric Drawing of the V stop shown in Figure. Use a suitable scale to depict the view well on an A3 drawing duet.
Estimate the temperature of the hottest point in the billet after five minutes of quenching. Neglect end effects; make the calculation for a cylinder of the given diameter but of infinite length.
What are the knot values? How many different curves is the B-spline curve composed of? Expand the B-spline curve equation to get the separate equations of the curves in b.
Hollow shaft transmitting power with shear limits. Design a hollow steel shaft to transmit 300 hp at 75 rpm without exceeding a shear tress of 8000 psi. Use 1.2:1 as the ratio of the outside diameter to the inside diameter.
(1) I shte cooling process polytropic? If so, what is the value of n? (2) Find the final state pressure. (3) Compute the work done for this process considering the water as a closed system.
Consider a cold air-standard Diesel cycle. Operating data at principal states in the cycle are given in the table below.For k=1.4 Cv=0.718kJ/(kg*k), and Cp= 1.005 kJ/(kg*K)
Determining the largest couple that can be applied to a beam in pure bending. A beam of cross section shown is extruded from an aluminum alloy for which σy = 310 MPa and σu = 480 MPa.
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