In the event of reference temperature(inlet air temperature of the forced draft fan) deviated from the assured temperature in performance test of boilers

due to heating effect of the fan

the correction formula of outgoing gas temperature from conventional pulverized coal boilers has already been incapable to be used for CFB boilers.On the basis of theoritical deduction

a formula for correcting calculation of outgoing gas temperature for CFB boilers has been put forward

and a trial calculation for correction under different actually assured conditions of CFB boiler has been carried out by using the said fomula for CFB boilers.Results show that the influence of considering the heating effect by the fan upon the calculated result is comparatively large

hence

sufficient importance should be attached to this problem in boiler design.