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6.169 A tank initially containing air at 30 atm and 5408F is connected to a small turbine. Air discharges from the tank through the turbine, which produces work in the amount of 100 Btu. The pressure in the tank falls to 3 atm during the process and the turbine exhausts to the atmosphere at 1 atm. Employing the ideal gas model for the air and ignoring irreversibilities within the tank and the turbine, determine the volume of the tank, in ft3. Heat transfer with the atmosphere and changes in kinetic and potential energy are negligible.
6.170 Air enters a 3600-kW turbine operating at steady state with a mass flow rate of 18 kg/s at 8008C, 3 bar and a velocity of 100 m/s. The air expands adiabatically through the turbine and exits at a velocity of 150 m/s. The air then enters a diffuser where it is decelerated isentropically to a velocity of 10 m/s and a pressure of 1 bar. Employing the ideal gas model, determine
(a) the pressure and temperature of the air at the turbine exit, in bar and 8C, respectively.
(b) the rate of entropy production in the turbine, in kW/K. Show the processes on a T-s diagram.
a heat pump with a cop of 3.0 is used to heat air contained in a 1205.4m3 of well-insulated rigid tank. initially the
Knowing that in the position shown the rod has angular velocity of 4 rad/s clockwise; determine the angular velocity of the rod after it has rotated through a 90°.
What is the expected profit from the policy and On average, how much does AnyLogo expect to donate to charity each year?
Derive analytical expressions for the helmoltz free energy fundamental relation of a single component ideal gas F(t, v, n) and for the Gibbs free energy fundamental relation of the same substance G(t,p,n)
it is desired to double the efficiency of a carrot heat engine from 30 by raising its temperatureof heat addition while
the critical shear stress for a crystal material is 3250 psi. if the angle of slip direction is 430 and the normal to
The electricity consumption in the USA in 2009 was about 44% of the total energy consumption. Of that about 20% was produced by Nuclear Power Plants. Currently there are 104 Nuclear Power Plants operating in the country. What is the average capacity ..
A cylindrical pressure vessel, with a diameter of 40cm and a wall thickness of 10mm is made of steel (isotropic, with Young's modulus = 200GPa; Poisson's ratio = 0.28) and is pressurized to 20MPa. The longitudinal and hoop stresses in the wall, σl an..
Show that if x[n] is a right-sided sequence and X(z) converges for some value of z, then the ROC of X(z) is of the form lzl > rmax or 00 > IZI > r max where rmax is the maximum magnitude of any of the poles of X(z).
distance per tank of gas a car with a 20-gallon gas tank averages 21.5 miles per gallon when driven in own and 26.8
suppose we want to measure the density of a sample of argon. we cant measure it directly but we can measure pressure p
water is flowing through a gradual constriction in a pipe. the upstream diameter of the pipe is d14cm and the
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