Applied Thermo

[studier]

Does anyone know where the heat transfer coefficient for air comes from in question #13 listed in the 1st class thermo of the librbry on this page? Any insight would be greatly appreciated.

[jimmys]

Usually need two materials for heat transfer coefficient ie. air and mild steel or air and insulation. Found by individual testing. When you look at air and insulation lots of different readings for similar materials. In thermo you are usually given a coefficient and you use it in you answer. Used in fireproofing a lot in A class bulkheads. An A class fire is set on one side and temperature rises taken on other.

regards