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Refrigerant 134a at -10°C, 1.4 bar and a mass flow rate of 280 kg/hr enters an insulated compressor operating at steady state and exits at 9 bar. The isentropic compressor efficiency is 82%. Determine (a) the temperature of the refrigerant exiting the compressor, in °C (b) the power input to the compressor, kW and (c) the rate of entropy production kW/K. The surrounds can be taken to be To= 20°C, Po = 100 kPa.
nitrogen is compressed in a polytropic process with n 1.2 from 120 kpa and 10oc to 800 kpa in a piston-cylinder
neil a. armstrong was the first person to walk on the moon. the distance between the earth and the moon is 3.85 108 m.
saturated r-134a vapor at 100of is condensed at constant pressure to a saturated liquid in a closed piston-cylinder
Midrange and amplitude components, A shaft is subjected to a completely reversed bending stress such that Xmax=40kpsi and Xmin=-40kpsi
a. given that the surface energy mass density and molar mass of ag are respective 1140 ergcm2 10.5 gcm3 and 108 gmolb.
1 kg of air is allowed to expand reversibly in a cylinder behind a piston in such a way that the temperature remains
a solid object of aisi 302 steel at a temperature of 850?c is quenched in mineral oil at a temperature of 25?c. the oil
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Find the compression ratio, cutoff ratio, the thermal efficiency, the mean effective pressure, and the P -v and T-s diagrams clearly showing all corners.
an ideal gas of molar mass m is located in a uniform gravitational field whose free fall acceleration is g. a find the
calculate the force required in direct extrusion of 1100-o aluminum y105 mpa from a diameter of 100mm in to 50mm.
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