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An air compressor compresses air from 1 bar and 300 K to 5 bar and 540 K. The velocity at the inlet is 70 m/s and the velocity at the exit is 150 m/s. If To = 300 K and Po = 1bar. Determine: assuming Ideal Gas
a) The specific work of the compressor
b) The specific Exergy destruction
A commercial refrigerator with refrigerant- 134a as the working fluid is used to keep the refrigerated space at 235°C by rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.25 kg/ s and leaves at 26°C.
in an annealing process a stainless steel plate 50 mm thick will be heated to at least 600degc from an initial
a 12-mm diameter jet of water discharges vertically into the atmosphere. due to surface tension the pressure inside the
A cutting tool (0.250in wide, rake angle 5 degrees) is used to machine in orthogonal mode. the depth of cut is 0.010in and the chip thickness is 0.027in. Calculate the shear angle and coefficient of friction at the tool and chip interface?
a car and its suspension system are idealized as a damped spring-mass system with natural frequency 0.5hz and damping
an ideal gas whose adiabatic exponent is equal to gamma undergoes a cycle consisting of two isochoric and two isobaric
steam enters an adiabatic turbine at 10 mpa and 800c. it leaves the turbine at 800 kpa and 500c. neglecting kinetic
Calculate the average spacing between free-electron energy levels in a cube-shaped crystal of Li that is one centimetre on each edge. At what cube size will the separation between energy levels be larger than the thermal energy available to the elect..
the piston is initially resting on the stops . the cylinder contains carbon dioxide at 50 psia and 200 f and takes up 1
consider a well-insulated horizontal rigid cylinder that is divided into two compartments by a piston that is free to
air is heated at steady state as it flows through a horizontal constant area duct. at the inlet the pressure is 2 bar
a load of lumber of weight w 25 kn is being raised by a mobile crane. knowing the tension is 25 kn in all portions of
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