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An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of 2208C and a condenser pressure of 12 bar. Saturated vapor enters the compressor, and saturated liquid exits the condenser. The mass flow rate of the refrigerant is 3 kg/min.
Determine
(a) the coefficient of performance.
(b) the refrigerating capacity, in tons.
Water in an open dish exposed to dry air at 25oC is found to vaporize at a constant rate of 0.04 g/h-cm2. Assuming the water surface to be at the wet-bulb temperature of ll.0°C, calculate the effective gas-film thickness
a baloon rises with a constant velocity.a load is tied by a rope to the basket. when the baloon is at altitude h0 the
a four-cylinder four-stroke 2.8-liter compression-ignition engine operates on the ideal dual cycle with a compression
in a gas turbine operating at a steady state air enters the compressor with a mass flow rate of 5 kgs at .95 bar and 22
air enters the compressor of an air-standard brayton cycle at 100kpa 300k with a volumetric flow rate of 5m3s. the
A structure is fixed to a surface at point O and supports 300 and 400 N couples as shown. Determine the resultant couple moment vector, using both scalar and vector approaches (solve twice).
Determine the force in each of the members connecting joints A through F of the vaulted roof truss shown. State whether each member is in tension or compression.
Answer the following questions. a.) Briefly describe the problem resulting from the overaging of a precipitation hardened alloy. b.) At what temperature does a 5.0wt% Cu-Al alloy completely solidify when slowly cooled from 700oC? c.) What is the maxi..
during a solar eclipse the moon earth and sun all lie on the same line with the moon between the earth and the sun.a
Nitrogen gas at 65kPa and 7C enters an adiabatic diffuser steadily with a velocity of 210 m/s and leaves at 119kPa and 22C. Determine the exit velocity of the nitrogen. the ratio of the inlet to exit area
the motion of a particle is defined by the relation 2t3-9t212t10 where x and t are expressed in feet and seconds
there are two machines available for cutting corks intended for use in wine bottles. the first produces corks with
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