Heat Transfer Questions & Answers | |
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I don't understand what you mean. Please explain better.
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If you use $k$, $\rho$ or $c$ elsewhere in your problem, then to be consistent you should compute $\alpha=k/\rho c$ and not take it from the tables.
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Hm I think I explained this in class. I am not sure what you don't understand. Tell us what exactly is confusing you..
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If an insulation layer is specified without a thermal conductivity, then assume its conductivity is zero (and hence there is no conduction heat transfer). If the insulation layer has a given thermal conductivity, then the heat transfer through the insulation layer will not be zero. 1 point bonus.
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Here we were doing an order of magnitude analysis. As long as $\delta$ and $\delta_t$ are within the same order of magnitude (and as will be shown later, they are), the analysis is correct. 1 point bonus.
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$\pi$ |