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A 4 in-OD pipe is to be used to transport liquid metals and will have an outside surface temperature of 1400F under operating conditions. Insulation is 6 in. thick and has a thermal conductivity expressed as, k = 0.08(1-0.003T) where k is in Btu/h*ft*F.
a) what thickness of insulation would be required for the outside insulation temp to be no higher than 300F.
b)What heat flow rate will occur under these conditions.
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So for b) I ended up with a negative value for q. Is that possible? I'm completely lost on a part, all help appreciated.
a) what thickness of insulation would be required for the outside insulation temp to be no higher than 300F.
b)What heat flow rate will occur under these conditions.
---
So for b) I ended up with a negative value for q. Is that possible? I'm completely lost on a part, all help appreciated.