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Cold water enters a steam generator at 20C, is vaporized at 165C and exits as a superheated vapor at 350C. The steam generator operates at constant pressure. Determine the following: a. the heat input to the generator (kJ/kg of steam produced) b. the fraction of the input heat used to i. preheat the liquid feed water to the saturation temperature of 165C ii. evaporate the water iii. superheat the water vapor to its final exit temperature.
consider a flow of air in a duct assume standard atmospheric pressure at 5000 ft altitude p12.228psi. at section 1 the
Niobium forms a substitutional solid solution with vanadium. Compute the weight percent of niobium that must be added to vanadium to yield an alloy that contains 1.55 x 1022 Nb atoms per cubic centimeter. The densities of pure Nb and V are 8.57 an..
a cylindrical bar of radius 15 mm and length 100 mm is held at both ends. if at 30 degc no axial force exists in the
problem 1heat is being generated uniformly throughout a sphere at volumetric rate 4. the radius of the sphere is r and
A particular grade of Nitinol SMA is capable of upto 6% strain recovery and develops an internal restoration stress of upto 300 MN m-2. Estimate the amount of force and distance of travel that could be triggered by warming a rod
the pressure in a partially evacuated enclosure is 26.8 in hg vacuum when the local barometer reads 29.5 in hg.
The steam from the nozzles of a single wheel impulse turbine discharges with a velocity of 600 m/s at an angle of 20 degrees. The blade wheel rotates at 3000 rev/min and the mean blade radius is 590 mm
In the idealized model attached shown, m = 15 kg, k = 135 N/m, and the viscous damping ratio is 0.15. Assume that an external harmonic force F(t) = 15 cos 4 t acts on the system with F0=15 N and forcing frequency of 4 rad/s.
Determine the thermal efficiency of the cycle and the net specific work. Assume each turbine stage isentropic efficiency to be 99% and assume the FWH is open.
a 1 m3 tank containing air at 25oc and 500 kpa is connected through a valve to another tank containing 5 kg of air at
The mass of one wheel is 125 kg and its radius of gyration is 0.75 m. The radius of a wheel is 1 m.
Calculate the minimal round-trip time delay for a radio communications link between Los Angeles and the satellite.
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