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Four kilograms of a two-phase liquid-vapor mixture of water initially at 300°C and x1 5 0.5 undergo the two different processes described below. In each case, the mixture is brought from the initial state to a saturated vapor state, while the volume remains constant. For each process, determine the change in exergy of the water, the net amounts of exergy transfer by work and heat, and the amount of exergy destruction, each in kJ. Let T0 5 300 K, p0 5 1 bar, and ignore the effects of motion and gravity. Comment on the difference between the exergy destruction values.
(a) The process is brought about adiabatically by stirring the mixture with a paddle wheel.
(b) The process is brought about by heat transfer from a thermal reservoir at 610 K. The temperature of the water at the location where the heat transfer occurs is 610 K.
Find the input/output equation using the P-operator approach when x2 is the output.
water is the working fluid in a regenerative rankine cycle with one closed feedwater heater and one open feedwater
the body is formed of slender rod and rotates about a fixed axis through point with the indicated angular properties.
the 2-lb box has a velocity of 5 fts when it begins to slide down the smooth inclined surface at a. the coordinates of
If solar irradiation with GS = 750 W/m2 and the spectral distribution of a blackbody at 5800 K is incident on this material, determine the fractions of the irradiation that are transmitted, reflected, and absorbed by the material.
a. What is the melting point at standard conditions for ammonia? Boling point is given -33.4C. b. What is the enthalpy change for boiling ammonia at 0C?
a tank with volume 0.100m3 is filled with helium gas. if a balloon is filled with helium until the diameter is 30.0cm
Determine the maximum velocity, the maximum acceleration and the acceleration and the force acting on the component when it is 50 mm from the central position.
For spherical sand particles with Dp = 0.045 inches and the density of each particle is 145 lbm/ft3, estimate the minimum fluidizing velocity for air and for water. Assume a porosity of 32 percent. You may need to rederive Equation 11.41 considering ..
At the instant shown, determine the velocity of the piston, the velocity of the point C and the angular velocity of the connecting rod.
Important information about Compressive Stress, A circular cross sectional bar with a diameter of 3.25 inches is loaded with a uniform axial compressive load of 22,750 pounds. What is the compressive stress along a cross section of the bar?
consider an air-standard brayton cycle. what is the efficiency of the brayton cycle if the pressure ratio is 20 and the
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