BOILER EFFICIENCY CALCULATION

BOILER EFFICIENCY

DIRECT METHOD

BOILER TOTAL STEAM (STEAM ENTHALPHY –FEED WATER ENTHALPHY)

COAL CONSUPTION *AVERAGE GCV OF COAL

INDIRECT METHOD

O2=FIND

UNBUNT CARBON (ESP)=FIND

ESP INLET TEMP=FIND

COAL MOISTURE

(GCV OF COAL *MOSITURE AVAILABLE IN THIS GCV OF COAL)

COAL CONSUPTION MT

ASH

(GCV OF COAL *ASH PART AVAILABLE IN THIS GCV OF COAL)

COAL CONSUPTION MT

UNBUNT LOSS

[(100 (ASH/100)*UNBUNT *8050) ]*100

[ (100-UNBUNT)* AVG GCV OF COAL ) ]

MOISTURE LOSS

[ (0.0285*9.516* ({(0.49024*ESP INLET TEMP0-(0.51*35)}*100]*100

AVG GCV OF COAL

MOISTURE FUEL

[{(COAL MOSITURE /100)+(8.94*0.0316)}* {(595.4+(0.49+024*ESP INLET TEMP)-35 }*100]*100

AVG GCV OF COAL

DRY FUELGAS LOSS

[{10.104*({(0.242*ESP INLET TEMP)-(0.232*35)}*100}]*100

AVG GCV OF COAL

RADIATION LOSS =1%

TOTAL EFFICENCY

[1-UNBUNT LOSS-MOISTURE LOSS -MOISTURE FUEL-DRYFUEL GAS LOSS-RADIATION LOSS]*100

ACTUAL GCV

DIRECT BOILER EFFICIENCY-INDIRECT BOILER EFFICIENCY

AVG GCV OF COAL