# Critical radius of insulation

1. ### mjki9ec3

3
In class, we were taught that the critical radius of insulation (found by differentiating thermal resistance WRT outer radius and setting to zero) gives a minimum resistance and thus and maximum heat loss- i.e. it's not always productive to insulate your pipe.

but could it not also give a maximum resistance and therefore a minimum heat loss?
differentiating again surely would tell you when it would be minimum and maximum?

Know someone interested in this topic? Share a link to this question via email, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted