ABSTRACT
This nomograph can be used to estimate heat lossesdue to natural convection from surfaces. It is based on the equation
where C = configuration-dependent constant (see key); d = pipe or tube diameter, in. (d = 24 for a flat surface); Q = heat loss, Btu/h· fr'; T = average of surface and ambient temperatures, "R; and IiT = difference between surface and ambient temperatures, "R,
To use Fig. 1,first connect IiT with the appropriate code for the Constant
