Electric current of 200 A is carried through a 5 mm diameter cylindrical wire which has a resistance of 0.003 ohm per meter length. The wire is exposed to a cross flow of air at 24°C and its surface temperature is measured as 40°C. In your calculations, take air properties at 300 K and use the following correlation and constants: Rep m 0.4-4 0.989 0.330 hD 4-40 0.911 0.385 Nup k = C Re, Pr 40-4000 0.683 0.466 4000– 40,000 0.193 0.618 40,000 – 400,000 0.027 0.805 Calculate the average heat transfer coefficient in W/m2K Calculate the air velocity in m/s

Electric current of 200 A is carried through a 5 mm diameter cylindrical wire which has a resistance of 0.003 ohm per meter length. The wire is exposed to a cross flow of air at 24°C and its surface temperature is measured as 40°C. In your calculations, take air properties at 300 K and use the following correlation and constants: Rep m 0.4-4 0.989 0.330 hD 4-40 0.911 0.385 Nup k = C Re, Pr 40-4000 0.683 0.466 4000– 40,000 0.193 0.618 40,000 – 400,000 0.027 0.805 Calculate the average heat transfer coefficient in W/m2K Calculate the air velocity in m/s

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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