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Refrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator temperature is 230°C. Saturated vapor enters the condenser at 36°C, and saturated liquid exits at the same temperature. The mass flow rate of refrigerant is 10 kg/min. Determine
(a) the rate of heat transfer to the refrigerant passing through the evaporator, in kW.
(b) the net power input to the cycle, in kW.
(c) the coefficient of performance.
(d) the refrigeration capacity, in tons.
A hydraulic pump has displacement of 3 in^3 and a mechanical efficiency of 0.92. The flow output of the pump is 21 gpm, and the pressure at the outlet is 1250 psi. Determine the torque required to run the pump at 1800 rpm.
a cold storage room has walls made of 0.23 m of brick on the outside 0.08 m of plastic foam and finally 1.5 cm of wood
the conduit between the turbine and nozzle nozzle output of an engine is 0.60 m in diameter. the gas has a pressure and
a rigid chamber contains 100 kg of water at 500 kpa 100 c. a paddle wheel stirs the water at 1000 rpm with a torque of
Determine the thickness of the 1.09m inside diameter pilot sphere (assume 4130 steel with ultimate tensile strength of 1,234MPa and a 200% factor of safety). The depth at which the sphere will fall is 10,908 meters.
A turbine disk made from a Ni-base superalloy will be operating at 1350F. The creep data are given below. Determine the maximum stress allowable if the design criterion requires less than 1% strain in 10,000 hours.
in a crystallin material slip occurs preferentially along planes having higher planar densities. for a material with an
The open-loop gain A of real (nonideal) op-amps is very large at low frequencies but decreases markedly as frequency increases. As a result, the closed-loop gain of op-amp circuits can be strongly dependent on ω = 4 × 103 rad/s determine
a room 3 by 3 by 3 m has one side wall maintained at 260 c. the floor is maintained at 90 c. the other four surfaces
fully developed laminar flow occurs between two horizantal parralel plates. the distance between the plates is 0.25
A rigid tank is divided into two equal parts by a partition. One part of the tank contains 8.4 kg of compressed liquid at 400 kPa and 65 degrees Celsius while the other part is evacuated. The partition is now removed, and the water expands to fill th..
A glass contains a mixture of water and ice cubes, with a total mass of 0.2 kg and at a temperature of 0 C. The mass of ice cubes is 1/3 of the mass of the mixture in the glass. As a result of heat transfer from the surroundings at 20 Celsius degree ..
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