Consider an electric motor whose catalog characteristics are provided, as indicated in the motor specifications. It is required to perform the exercise to calculate the heat flow dissipated by its outer surface. It can be considered that the motor has straight rectangular type fins (Table) as shown in the image. Considering that the fin data are those shown in the box. Consider that the outer diameter of the casing where the fins are placed is 106 cm. Given that the design value of the motor considers L=10mm, determine the optimal value of L that maximizes the heat flow of the motor, as well as the number of fins to be placed and their separation. Additionally, it is necessary to evaluate whether there will be an improvement in heat flow, if straight triangular or straight parabolic fins are used instead of straight fins, perform the corresponding calculations and analysis. Aletas rectangulares rectas m-√2Wkt L=L+12 Asta-2wL tanhmL Taleta mLc Condiciones de simulación CARACTERISTICA Temperatura trabajo W k = 15.1 m.°K t = 4x10-3m L = 8mm w=113mm h = 25 W m²**K To = 20°C VALOR 130°C 20°C Temperatura ambiente Tipo de fluido Aire Velocidad del fluido 0.5 m/s Refrigeración IC411

Consider an electric motor whose catalog characteristics are provided, as indicated in the motor specifications. It is required to perform the exercise to calculate the heat flow dissipated by its outer surface. It can be considered that the motor has straight rectangular type fins (Table) as shown in the image. Considering that the fin data are those shown in the box. Consider that the outer diameter of the casing where the fins are placed is 106 cm. Given that the design value of the motor considers L=10mm, determine the optimal value of L that maximizes the heat flow of the motor, as well as the number of fins to be placed and their separation. Additionally, it is necessary to evaluate whether there will be an improvement in heat flow, if straight triangular or straight parabolic fins are used instead of straight fins, perform the corresponding calculations and analysis. Aletas rectangulares rectas m-√2Wkt L=L+12 Asta-2wL tanhmL Taleta mLc Condiciones de simulación CARACTERISTICA Temperatura trabajo W k = 15.1 m.°K t = 4x10-3m L = 8mm w=113mm h = 25 W m²**K To = 20°C VALOR 130°C 20°C Temperatura ambiente Tipo de fluido Aire Velocidad del fluido 0.5 m/s Refrigeración IC411

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.

Chapter3: Transient Heat Conduction

Section: Chapter Questions

Problem 3.1P: Consider a flat plate or a plane wall with a thickness L and a long cylinder of radius r0. Both of...

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