Question

In non periodic transient heat conduction problem, the lumped heat parameters analysis is used when

• A. 2 & 3
• B. 1 & 2
• C. 1, 2, & 3
• D. 3 & 4

Answer 1

The correct option is B 1 & 2

Lumped capacity analysis is applicable only when, internal conductive resistance is negligible as compare to external convective resistance and Biot number (Bi) should be less than 0.1 $Bi<0.1$