Engineering, 28.11.2019 05:31 lexizamora2
Oil in an engine is being cooled by air in a cross-flow heat exchanger, where both fluids are unmixed. oil (cp = 2000 j/kg. k) flowing with a flow rate of 0.020 kg/s enters the heat exchanger at 75°c, while air (cp = 1000 j/kg. k) enters at 30°c with a flow rate of 0.20 kg/s. the overall heat transfer coefficient of the heat exchanger is 50 w/m2 . k and the total surface area is 1 m2 . determine: (a) the heat transfer effectiveness and (15 points) (b) the outlet temperature of the oil. (use the effectiveness-ntu method) (15 points)
Answers: 3
Engineering, 04.07.2019 08:10
Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed
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Engineering, 04.07.2019 18:10
Aflywheel accelerates for 5 seconds at 2 rad/s2 from a speed of 20 rpm. determine the total number of revolutions of the flywheel during the period of its acceleration. a.5.65 b.8.43 c. 723 d.6.86
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Engineering, 04.07.2019 18:20
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Engineering, 04.07.2019 18:20
Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency
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Oil in an engine is being cooled by air in a cross-flow heat exchanger, where both fluids are unmixe...
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