25362
Chemical
- Jan 5, 2003
- 4,826
Following the famous concept of critical thickness of insulation (rout=k/h), has anybody confirmed by experience that, up to a given fouling thickness, heat transfer actually increases with fouling in the convection section of a fired heater ?
Where:
rout = outside radius, m
k = thermal conductivity of scaling, 1-2 W/(m.K)
h = "clean" flue gases heat transfer coefficient, 20-40 W/(m2.K)
