Engineering, 08.10.2020 14:01, johngayden46
A thermocouple, with a spherical junction diameter of 0.5 mm, is used for measuring the temperature of hot air flow in a circular duct. The convection heat transfer coefficient of the air flow can be related with the diameter (D) of the sphere and the average air flow velocity (V) as h = 2.2(V /D)0.5, where D, h, and V are in m, W/m2•K, and m/s, respectively. The properties of the thermocouple junction are k = 35 W/m•K, rho = 8500 kg/m3, and cp = 320 J/kg•K. The maximum response time of the thermocouple to record 78 percent of the initially applied temperature difference is 5 s. Determine the minimum air flow velocity that the thermocouple can be used.
Answers: 2
Engineering, 04.07.2019 18:10, ijohnh14
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
Engineering, 04.07.2019 18:10, dval1146
You are making beer. the first step is filling the glass carboy with the liquid wort. the internal diameter of the carboy is 15 in., and you wish to fill it up to a depth of 2 ft. if your wort is drawn from the kettle using a siphon process that flows at 3 gpm, how long will it take to fill?
Answers: 1
A thermocouple, with a spherical junction diameter of 0.5 mm, is used for measuring the temperature...
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