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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.
Find the shear flow acting in each web/skin segment in the structure. As part of your final answer, in a sketch, clearly illustrate the resultant shear flow acting in each segment of the wall indicating its numerical value and direction.
Show that the specific heat at saturation of a liquid phase of mass m (defined by Cf= (deltaQ/m)dt is generally not the same as the specific heat at constant pressure of the saturated liquid.
The annual holding cost rate for this type of item has been estimated at 28%. What option is more economical?
1 a vapor power plant operates with water as the working fluid passing through the cycle at a flow rate of 12 kgs. in
Apparatus that liquefies helium is in a laboratory at 296 K. The helium in the apparatus is at 4.0 K. If 150 mJ of heat is transferred from the helium, find the minimum amount of heat delivered to the laboratory.
a pure jet engine propels an aircraft at 240 ms through air at 45 kpa and -13 c. the inlet diameter of this engine is
The block and tackle shown are used to raise a 150-lb load. Each of the 3-in.-diameter pulleys rotates on a 0.5-in.-diameter axle.
Iron is a polytropic material. At room temperature, it has a BCC crystal structure (alpha-iron or ferrite). Upon heating above 912C, it converts to a FCC crystal structure (-iron or austenite). If heated above 1394?C, it converts to a different BCC s..
Calculate the specific removal rate and MRR (Volume of metal removed/sec) of Nickel in a certain electro chemical dissolution process, when a current of 500 A is being passed through the cell. Assume current efficiency = 100%. Atomic Weight of Nickel..
A paper airplane is thrown up a hill with slope theta = 16.26 deg during a rainstorm. The airplane has an initial speed of 10 ft/s and is fired at an angle of phi=32.52 deg from the horizontal. Rain accumulation on the wings results in a vertical acc..
The coefficient of friction between the band and the pipe is 0.30, and that between the pipe and the block is 0.40. The weights of the parts are negligible.
A magnetic field is represented by a group of exes on the page, with an arrow to the right representing the velocity of a proton. How would the force exerted by the magnetic field be shows?
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