Convection is determined using a convection coefficient (heat transfer coefficient) h.
= hA(Tw - T), where
A = the heat transfer area
Tw = work temperature
T = fluid temperature
Resistance due to convection is given by:
R = 1/(hA)
For a straight fin:
, where
h = heat ransfer coefficient
p = exposed perimeter of fin k = thermal conductivity
Ac = cross-sectional area of fin
Tb = temperature at base of fin
T = fluid temperature m =
Lc = L + Ac/p L is length of fin.
Certified ISO-9001:2000, BS EN 9002, ANSI/ASQC Q9002