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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.
Assuming that the bomb is perfectly insulated what is the temperature of the air in the bomb at the end of filling process? Assume air is an ideal gas with constant specific heats in a ratio Cp/Cv = γ = 1.4 and constant R= 287 J/kg K.
a square 3m x 3m gate is located in the 45 sloping side of a dam. some measurements indicate that the resultant force
5 kgmin of 25 degree celsius water mixes with 7 kgmin of 72 degree celsius water in a mixing chamber. calculate the
determine the electrical power input to the pump. the density of water is 1kg/l.
A large stationary Brayton cycle gas-turbine power plant delivers a power output of 100MW to an electric generator. The minimum temperature in the cycle is 300K
water at atmospheric pressure boils on the surface of a large horizontal copper tube. the heat ?ux is 90 of the
saturated r-134a vapor at 100of is condensed at constant pressure to a saturated liquid in a closed piston-cylinder
How is the mechanical deformation energy defined? How do you calculate the work of fracture of a brittle material?
calculate the overall efficiency the heat rate mw and the total fuel rate kgs of a combined-cycle power plant 1 if no
water enters one end of a long coiled tube at 5000 kpa 220c at a steady rate of 2.20kgs. it is heated as it passes
the inner and outer surfaces temperatures of a 0.5-cm thick 2-m x 2-m window glass in winter are 100c and 30c
Determine the velocity of shearing along the shear plane and the velocity of sliding at the tool-chip interface and find the work done per minute in shearing the metal and against the friction.
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