Q3/ A 6(m) long 2(kW) electrical resistance wire is made of 0.2(cm)diameter stainless steel (k = 15.1 W/m °C). The resistance wire operatesin an environment at 30°C with a heat transfer coefficient of 140 (W/m?.°C) at the outer surface. Find the temperature distribution equation anddetermine the surface temperature of the wire.

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Answered: Q3/ A 6(m) long 2(kW) electrical…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Q4/A 2-mm-diameter and 10-m-long electric wire is tightly wrapped with a 1-mm-thick plastic cover whose thermal conductivity is k-0.15 W/m "C. Electrical measurements indicate that a current of 10 A passes through the wire and there is a voltage drop of 8 V along the wire. If the insulated wire is exposed to a medium at Ts= 30°C with a heat transfer coefficient of h-24 W/m² C, determine the temperature at the interface of the wire and the plastic cover in steady operation. Also find the critical radius of plastic insulation. [334 T=30°C Electrical wire Insulation bale 10 m
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A block with thickness 2.3cm, and conductivity k-4W/mK is heated such that its temperature at its top is T₁-191°C Above the block, air at temperature Tair 22°C is blowing across the top which has a surface area of 1m² with heat transfer coefficient of 26W/m²K. air & W/mK T₁ T₂ What is the thermal resistance from T₂ to T? Provide total thermal resistance answer in units of K/W and to 4-decimal places

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