Robbyj
Sep30-08, 01:07 AM
Say we have a box made of two materials (a box with an internal lining) and a lid for the box made of a certain material. If I fill the box with a heated liquid and cover a certain percentage with the lid, is the following calculation correct for heat loss in the liquid if you ignore any film or scale effects or am I going about this the wrong way?
delta Qtotal = ([Abox*delta T / (d1/k1+d2/k2)] + [Alid*delta T / (dlid/klid)] + [hair* Aair * delta T]) * delta t
The eventual purpose is to calculate the percentage of the box that needs to be covered by the lid in order to allow the liquid to cool to a certain temperature range in a specific amount of time.
delta Qtotal = ([Abox*delta T / (d1/k1+d2/k2)] + [Alid*delta T / (dlid/klid)] + [hair* Aair * delta T]) * delta t
The eventual purpose is to calculate the percentage of the box that needs to be covered by the lid in order to allow the liquid to cool to a certain temperature range in a specific amount of time.