Critical Insulation Thickness (for ElSid)

[AlanStevens]

ElSid asked me about turning a pdf file on critical insulation thickness, which I'd produced years ago, into a Mathcad file.  The attached is my quick attempt to do so.

Alan

[ELSID]

Dr. Stevens, for the derivative to solve for critical thickness, the symbolic equals should use the key word   solve,t    since we are solving for t (thickness).  Answer is k/h-R as expected.  A note should be added that the the critical thickness is ONLY dependent on the the coefficients as R is the radius of the pipe .  Working on a comprable sheet, which is why I requested help.  Your sheet "solved" my conundrum ... I was using the programming add bar instead of stacking the symbolic keywords.  Many thanks