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A counter flow, concentric tube heat exchanger used for engine cooling has been in service for an extended period of time. The heat transfer surface area of the exchanger is 5 m2, and the design value of the overall convection coefficient is 38 W/m2 · K. During a test run, engine oil flowing at 0.1 kg/s is cooled from 110°C to 66°C by water supplied at a temperature of 25°C and a flow rate of 0.2 kg/so Determine whether fouling has occurred during the service period. If so calculate the fouling factor, R''f (m2 · K/W).
consider an ideal simple gas turbine cycle. for a net power output of 10000 horse power an inlet air temperature of
find the diameter given flow rate and pressure what diameter orifice hole d is needed if under ideal conditions the
two fixed horizontal parallel plates are spaced 0.2 inches apart. a viscous liquid mu8x10-3 lb sft2 sg0.9 flows between
two large stationary parallel plates are separated by a gap of thickness h. two layers of fluid of different dynamic
A pump station has been designed to lift water out of a 6 metre deep pit (vented to atmosphere) via a centrifigual pump mounted at ground level. Calculate the Net Positive Suction Head (NPSH) for the system ?
asers can be used to drill or cut material. one such laser generates a series of high-intensity pulses rather than a
the slotted link is pinned at o and as a result of the constant angular velocity theta dot 3rads it drives the peg p
a particle travels along a straight line with an acceleration of a 10-0.2s ms2 where s is measured in meters.
A Pitot tube measures the total pressure on an airplane flying at sea level as 1.07 x 10^5 N/m^2. What is the velocity of the airplane?
a massive precisely machined 6-ft-diameter granite sphere rests upon a 4-ft diameter cylindrical pedestal as shown in
Consider laminar flow of a fluid through a square channel with smooth surfaces. Now the average velocity of the fluid is doubled. Determine the change in the head loss of the fluid. Assume the flow regime remains unchanged.
the vertical component of the landing speed of a parachute is to be less than 20 fts. the total weight of the jumper
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