Boiler Efficiency Excel Sheet [PDF]

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CALCULATION SHEET S. No.



Boiler Efficiency Calculations Date Unit Generation



I n s t a n t 1 3 S 6 a 29-Dec-10 ### m 1 ### M p 136 MW W l e 26.78 ### 29.21 ### 34.91 ### 9.10 ###



20-Dec-10 2 136 MW



27-Dec-10 1 135 MW



27-Dec-10 2 136 MW



23.70 30.80 36.40 9.10



26.60 28.60 35.20 9.60



25.30 29.20 35.70 9.80



36.60 2.16 1.48 14.06 0.20 9.10 3739.00



37.76 2.05 1.53 13.66 0.20 9.60 3769.90



36.99 2.06 1.52 13.73 0.20 9.80 3753.80



38.30 2.11 1.52 13.86 0.20 9.10 3880.40



### ### ### ### ### ### ###



22.00 13.00 0.02 0.57 1.58 1.18 3.80



22.00 13.00 0.02 0.40 1.98 1.35 4.50



22.00 13.00 0.02 0.50 1.63 1.18 3.50



17.00 10.00 0.02 0.46 1.90 1.32 4.45



### ### ### ### ### ### ###



Theoritical Air required for Combustion(Kg/Kg of coal)



4.39



4.51



4.42



4.58



###



Excess Air Supplied (%)



22.09



27.27



20.00



26.89



###



Actual mass of Air Supplied per Kg of Fuel



5.37



5.74



5.30



5.82



###



4.84 5.72 157.00 25.00 0.24 181.06



4.97 6.10 148.00 20.00 0.24 187.53



4.54 5.66 145.30 20.00 0.24 170.27



4.95 6.18 149.50 20.00 0.24 192.22



### ### ### ### ### ###



3.47



3.25



3.27



3.26



###



Proximate Analysis Report Fixed Carbon (%) Volatile Matter (%) Moisture (%) Ash(%)



Ultimate Analysis Report Carbon (%) Hydrogen(%) Nitrogen(%) Oxygen(%) Sulphur(%) Ash(%) GCV of Coal (Kcal/Kg) Coal Flow(t/hr) Dry Bulb Temperature (°C) Wet Bulb Temperature (°C) Humidity Ratio Unburnt carbon in Bottom Ash (%) Unburnt carbon in Fly Ash (%) Average Unburnt carbon (%) Oxygen % in flue gas (%) Losses calculation



1



Heat Loss due to dry flue gas(%) Mass of Dry flue Gas Kg/Kg of Coal Flue Gas Temperature(°C) Ambient Air Temperature(°C) Specific Heat of Flue Gas (Kcal/Kg⁰C) Heat Loss due to to Dry Flue Gas (Kcal/Kg)



2



Heat Loss due to evaporation of water formed due to H2 in fuel(%) Specific heat of superheated steam Kcal/Kg °C Heat Loss due to evaporation of water formed due to Hydrogen in fuel (Kcal/Kg)



0.63



0.63



0.63



0.63



###



129.70



122.63



122.91



126.39



###



3



Heat Loss Due to Moisture in Fuel(%) Heat Loss Due to Moisture in Fuel(Kcal/Kg)



6.49 242.85



6.21 233.95



6.30 236.67



5.99 232.36



### ###



4



Heat Loss due to Moisture in Air(%) Heat Loss due to Moisture in Air (Kcal/Kg)



0.21 8.03



0.22 8.33



0.20 7.54



0.22 8.54



### ###



5



Heat Loss due to radiation(%) Heat Loss due to radiation (Kcal/Kg)



1.00 37.39



1.00 37.70



1.00 37.54



1.00 38.80



### ###



6



Heat Loss due to Unburnt Carbon in Fly Ash(%) Fly ash Distribution(%) Fly ash in Kg of coal unburnt carbon in fly ash (%) Heat loss due to unburnt in fly ash(Kcal/Kg)



0.19 60.00 0.05 1.58 6.97



0.24 60.00 0.06 1.98 9.21



0.21 60.00 0.06 1.63 7.74



0.22 60.00 0.05 1.90 8.38



### ### ### ### ###



7



Heat Loss due to Unburnt Carbon in Bottom Ash(%) Bottom ash Distribution(%) Botom ash in Kg of coal unburnt carbon in bottom ash (%) Heat loss due to unburnt in Bottom Ash(Kcal/Kg)



0.04 40.00 0.04 0.57 1.68



0.03 40.00 0.04 0.40 1.24



0.04 40.00 0.04 0.50 1.58



0.03 40.00 0.04 0.46 1.35



### ### ### ### ###



8



Loss of sensible heat in Fly Ash Specific Heat of Ash(Kcal/Kg) Loss of sensible heat in Fly Ash (Kcal/Kg)



0.04 0.20 1.44



0.04 0.20 1.47



0.04 0.20 1.47



0.04 0.20 1.41



### ### ###



9



Loss of sensible heat in Bottom Ash Loss of sensible heat in Bottom Ash (Kcal/Kg)



0.16 6.08



0.17 6.45



0.18 6.59



0.16 6.12



### ###



10



Unaccounted Losses (Manufacturer's Margin)



1.00



1.00



1.00



1.00



###



Unaccounted Losses (Manufacturer's Margin) (Kcal/Kg)



37.39



37.70



37.54



38.80



###



Boiler Efficiency by Indirect Method (%)



82.55



82.86



83.22



83.14



###



Summary Unit Date S.No. Losses Heat Loss due to dry flue gas(%) 1 2 3 4 5 6 7 8 9 10



Heat Loss due to evaporation of water formed due to H2 in fuel (%) Heat Loss Due to Moisture in Fuel(%) Heat Loss due to Moisture in Air(%) Heat Loss due to radiation(%) Heat Loss due to Unburnt Carbon in Fly Ash(%) Heat Loss due to Unburnt Carbon in Bottom Ash(%) Heat Loss due to Sensible Heat in Fly Ash(%) Heat Loss due to Sensible heat in Bottom Ash(%) Unaccounted Losses (%) Boiler Efficiency by Indirect Method (%)



2 20-Dec-10 % Loss



1 27-Dec-10 % Loss



2 27-Dec-10 % Loss



1 ### 29-Dec-10 ### % Loss % Loss



4.84



4.97



4.54



4.95



###



3.47 6.49 0.21 1.00 0.19 0.04 0.04 0.16 1 82.55



3.25 6.21 0.22 1.00 0.24 0.03 0.04 0.17 1 82.86



3.27 6.30 0.20 1.00 0.21 0.04 0.04 0.18 1 83.22



3.26 5.99 0.22 1.00 0.22 0.03 0.04 0.16 1.00 83.14



### ### ### ### ### ### ### ### ### ###



INPUT- DATA Date Unit Remarks Generation



20-Dec-10 27-Dec-10 2 1



9-Jan-11 10-Jan-11 2 1



136



135



137



136



23.7 30.8 36.4 9.1



26.6 28.6 35.2 9.6



22 29.2 39.6 9.2



23.7 28.8 38.8 8.7



36.6 2.16 1.48 14.06 0.2 9.1 3739



37.76 2.05 1.53 13.66 0.2 9.6 3769.9



34.35 2.08 1.52 13.06 0.2 9.2 3779



35.53 2.07 1.52 13.17 0.2 8.7 3791



22 13 0.018 0.57 1.58 1.176 3.8 157 25 0.24



22 13 0.018 0.4 1.98 1.348 4.5 148 20 0.24



17 11 0.018 0.61 2.1 1.504 3.94 140 10 0.24



17 11 0.018 0.75 2.5 1.8 6.7 140.5 20 0.24



0.63



0.63



0.63



0.63



60 40 0.2



60 40 0.2



60 40 0.2



Proximate Analysis Report Fixed Carbon Volatile Matter Moisture Ash



Ultimate Analysis Report Carbon Hydrogen Nitrogen Oxygen Sulphur Ash GCV of Coal (Kcal/Kg) Coal Flow(t/hr) Dry Bulb Temperature Wet Bulb Temperature Humidity Ratio Unburnt carbon in Bottom Ash Unburnt carbon in Fly Ash Average Unburnt carbon Oxygen % in flue gas Flue Gas Temperature Ambient Air Temperature Specific Heat of Flue Gas (Kcal/Kg⁰C) Temperature of superheated steam(FSH outlet) Pressure of Superheated Steam(FSH outlet)(MPA) Specific heat of superheated steam Kcal/Kg °C Blowdown(t/hr) B/D Temperature B/D Pressure(Mpa) B/D Enthalpy(Kcal/Kg) Fly ash Distribution(%) Bottom ash Distribution(%) Specific Heat of Ash(Kcal/Kg) MS Flow (t/hr) MS Enthalpy(Kcal/Kg) FW Enthalpy (Kcal/Kg) HRH Flow (t/hr) HRH Enthalpy (Kcal/Kg) CRH Enthalpy (Kcal/Kg)



10-Jan-11 12-Jan-11 12-Jan-11 12-Jan-11 17-Jan-11 17-Jan-11 23-Jan-11 23-Jan-11 26-Jan-11 2 2 1 2 1 2 1 2 2 Instant Sample 134 136.45 136 135 136 136 137 137 136 22.64 28.7 39.06 9.6



25.51 29.416 39.237 5.837



23.46 30.04 39.41 7.09



23.37 29.88 39.77 6.98



24.55 29.34 39.17 6.94



24.3 29.58 39.24 6.88



14.87 31.74 41.58 11.81



17.17 29.81 41.97 11.05



16.39 30.87 41.24 11.5



34.54 2.03 1.53 13.04 0.2 9.6 3786



37.6 2.24 1.51 13.38 0.2 5.837 3757.26



36.17 2.22 1.5 13.42 0.2 7.09 3851.1



36.03 2.22 1.5 13.3 0.2 6.98 3876.4



36.68 2.18 1.51 13.31 0.2 6.94 3904.7



36.61 2.2 1.51 13.36 0.2 6.88 3948.6



29.81 2.14 1.47 12.99 0.2 11.81 3593



30.73 2.1 1.5 12.45 0.2 12.45 3561



30.58 2.1 1.48 12.9 0.2 11.5 3679.82



17 11 0.018 0.78 2.6 1.872 3.45 140 20 0.24



18 10 0.018 0.37 1.08 0.796 3.5 140 20 0.24



22.5 13 0.018 0.48 1.73 1.23 5.9 148 25 0.24



22.5 13 0.018 0.37 1.08 0.796 3.56 143.25 25 0.24



22 12.5 0.018 0.64 1.92 1.408 7.7 142 25 0.24



22 12.5 0.018 0.64 2.05 1.486 3.9 140 25 0.24



25 16 0.018 0 1.73 1.73 5.35 147.5 25 0.24



25 16 0.018 0 1.69 0.54 4.07 138.75 25 0.24



23 13 0.018 0.52 1.68 1.216 3.99 138.6 25 0.24



0.63



0.63



0.63



0.63



0.63



0.63



0.63



0.63



0.63



60 40 0.2



60 40 0.2



60 40 0.2



60 40 0.2



60 40 0.2



60 40 0.2



60 40 0.2