i need the answer quickly 7-74E A 12-ft-long, 1.5-kW clectrical resistance wire ismade of 0.1-in-diameter stainless steel (k = 8.7 Btu/h ft. "F).The resistance wire operates in an environment at 85°F.Dcterminc the surfacc temperaturc of the wirc if it is cooledby a fan blowing air at a velocity of 20 ft/s. For evaluationsof the air properties, the film temperature has to be founditeratively. As an initial guess, assume the film temperatureto be 200°F.85°F20 ft/s-1.5 kWresistanceheater111

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7-74E A 12-ft-long, 1.5-kW cleetrical resistanee wire is made of 0.1-in-diameter stainless steel (k = 8.7 Btu/h ft. "F). The resistance wire operates in an environment at 85°F. Determine the surfacc temperaturc of the wire if it is cooled by a fan blowing air at a velocity of 20 ft/s. For evaluations of the air properties, the film temperature has to be found iteratively. As an initial guess, assume the film temperature to be 200°F. 85°F 20 ft/s -1.5 kW resistance heater 111

7-74E A 12-ft-long, 1.5-kW cleetrical resistanee wire is made of 0.1-in-diameter stainless steel (k = 8.7 Btu/h ft. "F). The resistance wire operates in an environment at 85°F. Determine the surfacc temperaturc of the wire if it is cooled by a fan blowing air at a velocity of 20 ft/s. For evaluations of the air properties, the film temperature has to be found iteratively. As an initial guess, assume the film temperature to be 200°F. 85°F 20 ft/s -1.5 kW resistance heater 111

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.4P: An electrical transmission line of 1.2-cm diameter carries a current of 200 amps and has a...

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