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Water is the working fluid in a vapor power cycle with superheat and reheat. Superheated vapor enters the first turbine stage at 8 MPa, 480 degrees C, and expands to .7 MPa. Then, it is reheated to 480 degrees C befor entering the second turbine stage, where it expands to the condenser pressure of 8 kPa. The mass flow rate of steam entering the first turbine stage is 2.63*(10^5) kg/h. Each turbine stage operates with an isentropic efficiency of 88%. The pump operates with an efficiency of 80%. Determine for the cycle:
a. the net power developed, in kW
b. the thermal efficiency
c. the rate of heat transfer to cooling water passing through the condenser, in kW
Air at 250 kPA and 15C is being forced into a tire, which has a volume of 0.5m^3, at a velocity of 60 m/s through a 6 mm opening. Find the rate of change of the density in the tire.
in a quasi-equilibrium process in a closed system a gas expands from a volume of 0.15m3 and a pressure of 120kpa to a
Calculate the overall heat transfer coefficient between the air and the water (answer in W/m^2K).
the beam ab is pin supported at a and supported by a cable BC. determine the resultant internal loadings acting on the cross section at points d and e.
A mass of 2.5kg are hung vertically from a spring of stifness 5.4kN/m, calculate the maximum amplitude of vibration if the mass is not to jump off the hook.
an industrial water shutoff valve is designed to operate with 30 lb of effort force. The valve will encounter 200 lb of resistance force applied to a 1.5 in. diameter axle. what is the required wheel diameter to overcome the resistance force?
the crate containing 40 bricks sits on a slopped conveyor belt which is used to raise the crate to the next level of
the boy of mass 40 kg is sliding down the spiral slide at a constant speed such that his position measured from the top
a cylindrical storage tank with dimensions of 15 m height and 15 m inside diameter is used to store oil having a
the 230000 lb space shuttle orbiter touches down at about 220 mihr. at 200 mihr its drag parachute deploys. at 35 mihr
Derive the operational transfer function and the sinusoidal transfer function for an RC high-pass filter. Plot the step response and the complete frequency response (magnitude and phase).
find: a) the pitch diameter of the pinion. b) the pitch diameter of the gear. c) the output torque of the gear. d) the minimum length of the key used to attach the gear?
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