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Air enters the evaporator section of an air-conditioner at 100 kPa, 27oC with a volumetric flow rate of 6 m3 /min. R-134a enters the evaporator at 120 kPa with a quality of 0.3 and rate of 2 kg/min and it leaves as a saturated vapor at the same pressure.
Determine (a) the exit temperature of the air (oC) and (b) the rate of entropy production (kW/K) for the process in two ways:
1. Assume the outer surface of the evaporator is insulated. (2) Assume the outer surface is not insulated and heat is transferred from the surrounding medium which is at 32oC to the evaporator at a rate of 30 kJ/min.
a pump increases the water pressure from 70 kpa at the inlet to 700 kpa at the outlet. water enters this pump at 15
An airplane was moving with a velocity equal to 300 mph when the velocity was increased with uniform acceleration to 600 mph in 5 min, calculate the number of miles the airplane traveled during that interval of time.
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consider a regenerative rankine cycle with a 600c and 4-mpa throttle a 5-kpa condenser and an open feedwater heater at
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A diesel engine is fitted with a turbocharger that comprises a radial flow compressor driven by a radial flow exhaust gas turbine. The gravimetric air-fuel ratio is 20:1; the air is drawn into the compressor at a pressure of 1 bar and at a temperatur..
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an elevator weighs 1000lb and carries a load of 600 lbs and decends at 20fts. the cable that supports the elevator has
A 0.5-m3 rigid tank contains refrigerant-134a initially at 160 kPa and 40 percent quality. Heat is now transferred to the refrigerant until the pressure reaches 700 kPa. Determine (a) the mass of the refrigerant in the tank and (b) the amount of heat..
A 24-tooth gear has AGMA standard full-depth involutes teeth with diametral pitch of 5. Calculate the pitch diameter, circular pitch, addendum, dedendum, tooth thickness and clearance. All dimensions must be taken to 4 decimal places to account for m..
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