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A Rankine cycle with regeneration has one open and one closed feedwater heat. Steam leaves the boiler at 1400psi, 1000°F and expands to 500 psi where a portion of the steam is extracted to the closed feedwater heater. Condensate exits the closed feedwater heater saturated at 500 psi and is trapped into the open feedwater heater operating at 120 psi. The feedwater leaves the closed feedwater heater at 1400 psi at a temperature equal to the saturation temperature at 500psi. The remaining steam expands through the second stage turbine to 120 psi where some of the steam is extracted to the open feedwater heater. Saturated liquid exits the open feedwater heater. The remaining steam expands through the third state turbine to the condenser which is operating at a pressure of 2 psi. Consider the pumps and turbines to operate adiabatically and to all have isentropic efficiencies of 85%. The net power output of the cycle is 1 x 109 Btu/hr. Calculate:
a) the mass flow rate of steam through the first turbineb) the rate of heat transfer in Btu/hr to the into the steam generatorc) the thermal efficienc
the old style heating uses steam or hot water in an radiator to heat a room in winter time. a radiator can be
Sketch the frequency response of the system. Overlay the frequency spectrum of the excitation and as you start the system up, increasing Ω from 0 to 60 rpm, what speeds are most likely to excite large amplitude response? Why?
a household refrigerator with a cop of 1.2 removes heat from the refrigerated space at a rate of 60 kjmin. determine a
The roof is supported by cables. If the cables exert FAB = 100N and FAC = 120N on the wall hook at A, determine the magnitude of the resultant force acting at A.
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One side of a right triangle is known to be 45 cm long and the opposite angle is measured as 30?, with a possible error of 1?.
a cannonball with mass m is fired with an initial speed v0 at an angle theta ablve the horizontal. compute the time it
1. what happens to the cutting and thrust force as tool rake angle and cutting speed are increased?2. how does the
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