Heat Transfer by Conduction Resistance through a Cylindrical Wall
Heat Transfer by Conduction Resistance Through a Cylindrical Wall Formula |
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| \( R_t \;=\; ln \; ( \frac {r_2 }{ r_1 } ) \;/\; 2 \; \pi \; k \; l \) | ||
| Symbol | English | Metric |
| \( R_t \) = thermal resistance | \(hr-F\;/\;Btu\) | \(K\;/\;W\) |
| \( l \) = length of material | \(ft\) | \(m\) |
| \( ln \) = natural logarithm | \(dimensionless\) | \(dimensionless\) |
| \( \pi \) = Pi | \(3.141 592 653 ...\) | \(3.141 592 653 ...\) |
| \( r_1 \) = radius inside diameter (ID) | \(in\) | \(mm\) |
| \( r_2\) = radius outside diameter (OD) | \(in\) | \(mm\) |
| \( k \) = thermal conductivity | \(Btu-ft\;/\;hr-ft^2-F\) | \(W\;/\;m-K\) |
Tags: Heat Transfer Heat