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1.21 The thermal conductivity in a particular plane wall depends as follows on the wall temperature, T (°C): k = A + BT, where A and B are constants. The temperatures are T₁ and T2 on either side if the wall, and its thickness is L. By integration of Fourier's law, develop an expression for q. At what temperature should k be evaluated to avoid the need for integration?

1.21 The thermal conductivity in a particular plane wall depends as follows on the wall temperature, T (°C): k = A + BT, where A and B are constants. The temperatures are T₁ and T2 on either side if the wall, and its thickness is L. By integration of Fourier's law, develop an expression for q. At what temperature should k be evaluated to avoid the need for integration?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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1.21 The thermal conductivity in a particular plane wall depends as follows on the wall temperature, T (°C): k = A + BT, where A and B are constants. The temperatures are T₁ and T2 on either side if the wall, and its thickness is L. By integration of Fourier's law, develop an expression for q. At what temperature should k be evaluated to avoid the need for integration? Figure 1.21 Configuration for Problem 1.22 (T_= 100°C) h = 200 W/m² °C T= 20°C- Chapter 1: Introduction 0.08 m T= 0°C Pro Sp
Transcribed Image Text:1.21 The thermal conductivity in a particular plane wall depends as follows on the wall temperature, T (°C): k = A + BT, where A and B are constants. The temperatures are T₁ and T2 on either side if the wall, and its thickness is L. By integration of Fourier's law, develop an expression for q. At what temperature should k be evaluated to avoid the need for integration? Figure 1.21 Configuration for Problem 1.22 (T_= 100°C) h = 200 W/m² °C T= 20°C- Chapter 1: Introduction 0.08 m T= 0°C Pro Sp
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