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Air enters the evaporator section of an air-conditioner at 100 kPa, 27 C with a volumetric flow rate of 6 m^3 /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 and (b) the rate of entropy production (kW/K) for the process in two ways: (i) Assume the outer surface of the evaporator is insulated. (ii) Assume the outer surface is not insulated and heat is transferred from the surrounding medium which is at 32 C to the evaporator at a rate of 30 kJ/min.
an air conditioning system is designed for a zone with a high dehumidification demands and humid outdoor conditions.
a16 lb bowling ball is rolling with a velocity of 20 fts toward a ramp that is inclined at 20 degrees to the
A hypersonic gun tunnel is used to generate short-duration, high-speed flows and typically consists of two cylindrical volumes separated by a diaphragm. One end of the tunnel (the driver end) is pumped to a high pressure, while the other end (the dri..
a nozzle for a carbon dioxide co2 fire extinguisher is based on the following inlet conditions pressure2500 kpa
an accident at a nuclear power plant causes the main valves to close and stop the main water flow that cools the
a cast- iron cylinder of 300mm bore carries a pressure of 30 newtons per square millimitrewhat should be its thickness
determine the minimum time needed for the plate temperature to reach 140°C.
steam enters an extraction turbine in a vapor power plant operating at steady stte at 10 mpa 480 c. 25 of the steam is
Two standard gears in mesh have 48 and 102 teeth, respectively. Their diametral pitch is 10, and the pinion rotates at 60 rpm cw. Determine the center distance between the gears, the pitch diameters, the circular pitch, the pitch line velocity, the l..
one way to decrease the power needed to compress a gas using a compressor is to encompass the compressor in a water
A flat bar as shown in the figure below is subjected to an axial load F equal to 500 kn. Assuming that the stress in the bar is limited to 200 n/mm^2 determine the thickness of the bar. All dimensions are in mm
a refrigeration cycle is a reversed heat engine. which of the following has the maximum value of the co-efficient of
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