Engineering, 15.10.2019 02:30 whitbol
Superheated steam at an average temperature of 140°c is transported through a steel pipe (k = 50 w/m·k, do = 8.0 cm, di = 6.0 cm, and l = 20.0 m). the pipe is insulated with a 4-cm-thick layer of gypsum plaster (k = 0.5 w/m·k). the insulated pipe is placed horizontally inside a warehouse where the average air temperature is 10°c. the steam and the air heat transfer coefficients are estimated to be 800 and 200 w/m2·k, respectively. calculate (a) the daily rate of heat transfer from the superheated steam, and (b) the temperature on the outside surface of the gypsum plaster insulation.
Answers: 2
Engineering, 03.07.2019 15:10, brooklyn674
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Engineering, 04.07.2019 18:10, niicoleassssssf
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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Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
Superheated steam at an average temperature of 140°c is transported through a steel pipe (k = 50 w/m...
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