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The corresponding Rankine cycle for an actural power plant(using water) runs at a high pressure of 6.3MPa, a low pressure of 0.01 MPa, and a high temperature of 779K. The actural entropy increase in
Consider a stream power plant that operates on the ideal reheat Rankine cycle. The plant maintains the boiler at 7000kPa, the reheat section at 800 kPa, and the condenser at 10 kPa. The mixture qual
Air is compressed by a 30-kW compressor from P1 to P2. The air temperature is maintained constant at 25 degrees C during this process as a result of heat transfer to the surrounding medium at 17 deg
A steady flow compressor is used to compress air from 1 atm, 25ºC to 8 atm in an adiabatic process. the compressor efficiency is 87%. Calculate the actual work required to compress the air.
A 0.5 m^3 tank contains air at 300 K and 0.75 MPa. A valve is suddenly opened and air rushes out until the tank pressure drops to 0.15 MPa. The air in the tank at the end of the process may be assum
Air enters the compressor section of a turbojet engine at 15 C and 0.1 MPa at a rate of 100 m^3/min. The air leaves at 0.5 MPa Changes in potential energy and kinetic energy are negligible.
Discuss how the steam power plant (steam engine) (Rankine cycle) can control the speed of the vehicle during acceleration and deceleration.
A 10 kg slab of Cr-V steel at 900 C is to be quenched by immersing in a vessel of water. Assume the slab exhibits a spatially uniform temp, T, and there is no heat transfer between water and air.
All elbows are 90 degrees with K factor = 0.75. Pipe lengths and inside diameters are given in the figure. Determine also the heat-generation rate due to frictional pressure losses.
A company crates its products for shipping as shown (base plate with two springs holding a crate- mass suspended in crate by single springs above and below).
A sphere 1 ft in diameter is moving horizontally at a depth of 12ft below water surface where the water temperature is 50 degrees ferinheight. At what speed in still water will cavitation first occur
A mass of 1.0 kg sits atop a spring mounted to the ground. The system is subjected to a half-sine shock pulse of duration T=0.1 sec and magnitude Fo=1.0 N. Determine the value of k such that resona
What is the effect on a combustion system of (i) increasing the excess air fraction; (ii) incomplete combustion? Give reasons for your answers. Describe the effects on (i) the power output and (ii)
For a material with an FCC crystal structure whould slip be more likely to occur along the (11) plane or the (100) plane? Why?
In an oil refinery methane gas (CH4) enters a compressor at a steady rate of 0.9 kg/s and at a pressure 2 bar, temperature of 60deg C and a velocity of 60 m/s. At exit from the compressor, the metha
Determine atsteady state the volumetric flow rate of air exiting the building,in ft3/min. When expressed in terms of teh volume ofthe occupied space, determine the number of building air changesper
A 15 kg block (B) is being pulled along a smooth surface by a winch (A). Assume the winch is a 10 kg disc with a constant angular velocity of 12 rad/s, counter clockwise. What is the total kinetic
How many total interstitial sites are there in one cubic meter of Pt at 20 C Which would you expect to be more probable in Pt at 20 C, vacancy diffusion or interstitial diffusion?
A 3.27 m^3 tank contains 100kg of nitrogen at 225 K. Determine the pressure in the tank, using the following the ideal-gas equation of state.
Fluid A, available at 10oC is to be heated in a one-shell-pass four-tube-pass exchanger, heat using fluid B available at 180oC. When the mass flow rates of fluids A and B are mA and mB, the respecti
A 500 MW electric station, utilizes a Rankine Cycle power plant with superheat. The steam temperature and pressure at the turbine inlet are 1000ºF and 2000 psia.
Determine the final temperature (K) and the final pressure (kPa) of the complete system, assuming constant specific heats.
Sketch the yield envelope of a glassy polymer under biaxial and uniaxial stress. Explain shear yielding and crazing. Under what conditions can one expect there to be no crazing in the material.
Water at 20 MPa and 60 degrees celcius enters a mixing chamber at a rate of 280lbm/min, where it is mixed steadily with steam entering at 20psia and 230 degrees Farenheight at a rate of 25lbm/min.
Calculate the mass of the fluid present. Determine the value of n in the first process. Compute the net work of the cycle.