Consider an electric motor whose catalog characteristics are provided, as indicated in the motorspecifications. It is required to perform the exercise to calculate the heat flow dissipated by itsouter 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 thecasing where the fins are placed is 106 cm. Given that the design value of the motor considersL=10mm, determine the optimal value of L that maximizes the heat flow of the motor, as well as thenumber of fins to be placed and their separation. Additionally, it is necessary to evaluate whetherthere will be an improvement in heat flow, if straight triangular or straight parabolic fins are usedinstead of straight fins, perform the corresponding calculations and analysis.Aletas rectangulares rectasm-√2WktL=L+12Asta-2wLtanhmLTaleta mLcCondiciones de simulaciónCARACTERISTICATemperatura trabajoWk = 15.1m.°Kt = 4x10-3mL = 8mmw=113mmh = 25Wm²**KTo= 20°CVALOR130°C20°CTemperaturaambienteTipo de fluidoAireVelocidad del fluido0.5 m/sRefrigeración IC411

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Answered: Consider an electric motor whose…

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.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.1DP

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A gas filled tube has 2 mm inside diameter and 25 cm length. The gas is heated by an electrical wire of diameter 50 microns (o.05 mm) located along the axis of the tube. Current and voltage drop across the heating element are 0.5A and 4 volts, respectively. If the measured wire and inside tube wall temps are 175C and 150C respectively, find the thermal conductivity of the gas filling the tube.
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Let's say a 3.0 gram copper wafer is dropped from a height of 50.0 meters. If 60% of the potential energy lost in the drop could be converted to thermal energy used to heat the copper from an initial temperature of 25 degrees celsius, what would the final temperature of the copper wafer? Would the answer be different if the wafer has a mass greater than 3 grams? Note: the specific heat of copper is 387 J/(kg*K). The temperature is between 25.8 and 26.0 degrees celsius, yes the bigger the mass the greater the energy. O The temperature is between 25.6 and 25.8 celsius, answer does not depend on mass. O The temperature is between 25.0 and 25.2 celsius, answer does not depend on mass. O The temperature is 25.5 and of course the more mass something has the greater energy will be needed to raise the temperature. The temperature is 26.2 and if the mass is doubled so will be the change in temperature. O The temperature is 25.9 degrees celsius and the answer does not depend on mass. O The…
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A Pressurized Water Reactor fuel rod is 12 ft long and 0.374 inches in diameter (outer) on a 0.496 inch square pitch. The fuel pellet diameter is 0.3225 inches. The fuel rod gap is constant with a width of 0.0065 inches. The system pressure is 2250 psia and can be assumed to be constant. The rod operates at linear heat rate of 12.1 kW/ft. At the elevation of interest, the coolant temperature is 575 °F with a convective heat transfer coefficient of 6200- For this elevation determine the temperature BTU hr ft²F margin to boiling according to Jens-Lottes. Also assume constant fluid properties given as: p=46.39 Ibm = ,c. 1.261- BTU Ibm-F BTU -,k=0.334- hr-ft-F Ibm ft-hr M=0.222- -, Tsat 652.7F =
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