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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).
How is a modern passenger aircraft brought to halt after landing? Considering the enormity of a modern jetliner and the momentum involved.
If heat engines efficiency can be increased by increasing the highest temperature why do we not increase the temperature further for our power plants? What could be done still to raise the temperature of the high temperature reservoir? What could be ..
At what distance below the bottom of the tank is the cross-sectional area of the stream equal to one-half the area of the hole?
Determine the initial density (kg/m3) of nitrogen gas that existed in section B.
a concentric cylinder viscometer may be formed by rotating the inner member of a pair of closely fitting cylinders. the
a 14 scale model of a tractor trailer is tested in a wind tunnel under standard sea level conditions. the model
air enters an insulated compressor operating at steady state at 1.05 bar 23 degrees c with a mass flow rate of 1.8 kgs
india has a land area of 2.97 x 106 km2 57 of which is cropland. if 5 of the cropland were dedicated to producing
the capacitance in a series rcl circuit is c1 2.74 ?f and the corresponding resonant frequency is f01 6.57 khz. the
Define the decision variables and write out an optimization problem. Give the complete formulation explicitly stating objective function, all constraints and parameter values. Use Excel program to solve the formulated optimization problem. Show ev..
steam enters an adiabatic turbine at 2 mpa 300c and exits at 50 kpa. the mass flow rate through the turbine is 2 kgs
Circuit boards are manufactured on sheets and tested. On average, there are 3 defects per sheet. What are the chances of 10 defects on a given sheet, no defects on a sheet, and more than 1 defect on a sheet?
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