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Moist air at 95°F, 1 atm, and a relative humidity of 30% enters a steam-spray humidification device operating at steady state with a volumetric flow rate of 5700 ft3/min. Saturated water vapor at 230°F is sprayed into the moist air, which then exits the device at a relative humidity of 50%. Heat transfer between the device and its surroundings can be ignored, as can kinetic and potential energy effects. Determine
(a) the temperature of the exiting moist air stream, in °F.
(b) the rate at which steam is injected, in lb/min.
consider a regenerative rankine cycle with a 600c and 4-mpa throttle a 5-kpa condenser and an open feedwater heater at
water at a gauge pressure of 3.8 atm at street level flows into an building at a speed of 0.06 ms through a pipe of 5.0
An inventor claims to have developed a device that executes a power cycle while operating between reservoirs at 500 and 300 K that has a thermal efficiency of (a) 45%, (b) 40%, (c) 35%. Evaluate the claim for each case.
Two kilograms of water undergo a process from an initial state where the pressure is 2.5 MPa and the temperature is 400°C to a final state of 2.5 MPa, 100° C. Determine the entropy change of the water, in kJ/K, assuming the process is irreversibl..
consider an ideal gas contained in a cylinder that can do work by pushing against a piston which has a surface area of
A piston cylinder holds air at 80 degree F and 15 psi. During an adiabatic process the pressure increased to 165 psi and the entropy generated is 0.15 Btu/lb-degree R. Determine the isentropic efficiency for this process.
a jet engine is a serial combination of a compressor an adiabatic constant pressure combustor and a turbine in that
a small spherical ball is gently released from rest in a cylindrical tank completely filled with glycerine. the ball
The pressure in a tire depends on the temperature of the air in the tire. The gage pressure of an automobile tire with a volume of 0.025 m3 is measured to be 210 kPa at 25 oC at sea level on a day with calm weather. If the temperature of the air in t..
a vapor initially at 50 psia and 100 f state 1 is contained within a piston- cylinder device. the refrigerant is cooled
Water at 150C flows in 1½-inch Sch 40 steel pipe with a flow velocity of 2.86 m/s. The pipe expands to 4-inch Sch 40.
Compute the coordinates of the midpoint of the couple DE. Use Maple to plot the coupler curve for this point as a function of the input angle θ and calculate the mobility of the linkage
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