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Engine oil is to be cooled down from 95C to 75C to be used as a lubricant; it has a constant flow rate of 500 kg/hr. Water at 25 C is to be used as the coolant. For economical pumping, the water velocity must be kept less than 2 m/s and the oil velocity to 1 m/s. Develop a double pipe heat exchanger, specifying velocities, mass flowrates, length and inlet and outlet temperatures. Also calculate the pressure drop for each fluid. Use schedule-40 wrought steel pipe in standard dimensions for both the inner and outer pipes. Use hydraulic diameter to analyze the annular flow.
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.
helium gas expands from 125 kpa 350k and 0.25m3 to 100 kpa in a polytropic process with n 1.667 or 53. is the work
a derrick is capable of supporting 500000 lbf. how many feet of 13 38 in 72 lbmft casing could be supported by the
an isolated system consists of a closed copper vessel of mass 0.1 kg containing 1 kg of liquid water each initially at
a piston-cylinder arrangement initially contains water at p 300 psia and t 500of. the piston is moved to a final
a piston-cylinder containing 1 kg air at 500degc and 500 kpa is connected to a carnot heat engine where the environment
1. which of the following statements are true for the line defecta burger vector is parallel to dislocation in an edge
the atmospheric pressure on a hypothetical planet is only 10000 pa while the gravitational constant g is 10 times that
the rear window of an automobile is defogged by passing warm air over its inner surface. if the warm air is at 30 c and
In a tubular low pressure chemical vapor deposition (LPCVD) reactor, gas is introduced at one end at a rate of 75 torr-L/min. At the other end is a vacuum pump of a speed Sp. If the reactor must operate at 1 torr, what value of Sp is required?
the acceleration of a particle is given by a -ks2 where a is in meters per second squared k is a constant and s is in
determine the work done in lifting a 250-lb refrigerator 4 ft vertically into a van. alternatively the refrigerator
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