Heater1.xls
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furnace efficiency
Fuel oil
DATA INPUT Ambient air Temp. (Ta) Flue Gas Temp. (Te) Fuel oil Gas Temp. (Tf) Atomizing Steam Temp. (Tm) Design datum Temp. (Td)
°C °C °C °C °C Lb/in2 g Lbs/Lbf
But/Lb
25 273 100 185.56 15.55 50 0 90 4.2 21 7.35 18000
Lb/in2
0 0 1.14 0 1.14 0.07
Steam Tables @ (Ta)
But/Lb
0.24
FIG @ (Ta)
But/Lb
0.55
Enthalpy (hm)
But/Lb
1195.5
Enthalpy (hd)
But/Lb
1087.7
FIG @ (Tf) Steam Tables @ (Tm) Steam Tables @ (Td)
ITEMS Total Impurities (Wt%) % H2 %C LHV Btu /Lb
Equations SUM Of Impurities (from analysis (100 - Wt% impurities) / (C/H + 1) (100 -( % H2 +% impurities)
Pressure of steam Quantity of Atomizing Steam Humidity O2 °API of fuel oil C/H HHV Impurities (Wt%) Water Vapor Ash S Other Total VAPOR Pressure (Water)
Cpair Cpfuel
HHV - (9x1059.7) x (%H2/100)
Results 1.14 11.8395209581 87.0204790419 16870.829367665
CORRECTION FOR RELATIVE HUMIDITY:
(V.PH2O x Humidity x18) /14.696 x 100x28.85)
Moisture in air Lb/Lb air Lb of Wet air /Lb of fule required Lb of moisture /Lb of fule Lb of H2O /Lb of fule
Air required / ( 1 - Moisture in air) (Lb of Wet air /Lb of fuel required) - (Air required) (H2O formed + (Lb of Moisture/Lb of fuel)+Atomizing Steam)
0.0027 14.1628436229 0.0378807487 1.0963339223
CORRECTION FOR EXCESS AIR :
Lb of excess air /Lb of fule
(28.85 x %O2) x (N2 formed /28 +CO2/44 + H2O formed /18) (20.95 - %o2) [(1.6028 x (LbH2O / Lb air required)) +1 ]
% Excess air
(Lb excess air / Lb fuel ) / Air required
Total Lb of H2O / Lb of fuel (Corrected for Excess air)
[(%excess air/100) x (Lb Moisture / Lb fuel)] + (LbH2O/Lb fuel)
Air Sensible heat (Ha) Fuel Sensible heat (Hf)
Btu/Lb of fuel Btu/Lb of fuel
Atomizing Sensible heat (Hm)
Btu/Lb of fuel
CP air x(Ta -Td) x(Lb air/Lb fuel) CP fuel x(Tf -Td) (Hm - Hd) x Lb steam /Lb fuel
3.7778082084
26.7456151359 1.1064653616 73.2409170364 83.6055 0
NET RESULTS : Qr
Btu/Lb (fuel)
Net thermal efficiency Gross thermal efficiency
2.5 / 100 x LHV (e) % (egross)
%
421.7707341916
[(LHV + Ha + Hf + Hm) -- (Qr +Qs)] / [(LHV + Ha+ Hf + Hm)] x 100 [(LHV + Ha + Hf + Hm) -- (Qr +Qs)] / [(HHV + Ha+ Hf + Hm)] x 100
83.3541117121 78.1703362443
Stack Loss at Exit flue gas (T e)
Lbcomp.formed/Lb fuel
Enthalpy Btu/Lb
Qs Btu/Lb of fuel
CO2
3.2077495329
110
352.8524486228
Water Vapor
1.1064653616
225
248.9547063536
N2
10.8599441198
125
1357.4930149701
Air
3.7778082084
120
453.3369850131
Total
18.9519672227
580
2412.6371549595
Component
OIL FIRED HEATER FUEL COMPONENT C H2 O2 N2 CO CO2 METHANE ETHANE ETHYLENE PROPANE PROPYLENE BUTANE BUTYLENE PENTANE HEXANE SULFUR H2S INERTS TOTAL / Lb Of Fuel
A weight Fraction
B M.wt
85 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100
12 1 0 0 0 0 14.53 2.56 0 1.53 0 0.55 0.27 0.73 0.06 32 0 0
D=(A X B) Tatol Weight Lb 0.8702047904 0.1183952096 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0114 0 0 1
C (D X C) Net Heating Value Heating Value Btu/Lb Btu 14100 12269.8875449 51600 6109.19281437 0 0 0 0 4345 0 0 0 21500 0 20420 0 20290 0 19390 0 19690 0 19670 0 19420 0 19500 0 19390 0 3940 44.916 6550 0 0 0 259805
E Air Reqired Lbair /Lb 11.51 34.29 -4.32 0 2.47 0 17.24 16.09 14.79 15.68 14.79 15.46 14.79 15.33 15.24 4.31 6.08 0 193.75
(D X E) Air Reqired Lb 10.01605714 4.059771737 0 0 0 0 0 0 0 0 0 0 0 0 0 0.049134 0 0 14.12496287
F CO2 Formed Lb Co2/Lb 3.66 0 0 0 1.57 1 2.74 2.93 3.14 2.99 3.14 3.03 3.14 3.05 3.06 2 1.88 0 37.33
(D X F) CO2 Formed Lb 3.184949533 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0228 0 0 3.207749533
G H2O Formed Lb H2O/Lb 0 8.94 0 0 0 0 2.25 1.8 1.28 1.63 1.28 1.55 1.28 1.5 1.46 0 0.53 0 23.5
(D X G) H2O Formed Lb 0 1.058453174 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1.058453174
H N2 Formed Lb N2/Lb 8.85 26.36 -3.32 1 1.9 0 13.25 12.37 11.36 12.05 11.36 11.88 11.36 11.78 11.71 3.31 4.68 0 149.9
(D X H) N2 Formed Lb 7.701312395 3.120897725 0 0 0 0 0 0 0 0 0 0 0 0 0 0.037734 0 0 10.85994412
Fuel gas
Efficiency of Fired Heater DATA INPUT Ambient air Temp. (Ta) Flue Gas Temp. (Te) Fule oil Gas Temp. (Tf) Atomizing Steam Temp. (Tm) Design datum Temp. (Td)
°C °C °C °C °C Lb/in2 g Lbs/Lbf
Pressure Quantity of Atomizing Steam Humidity O2 VAPOR Pressure (Water)
Cpair Cpfuel gas HHV
ITEMS LHV
Lb/in2
25.00 241.00 36.00 0.00 15.55 0.00 0.00 90.00 4.05 0.07
But/Lb
0.31
FIG @ (Ta)
But/Lb
0.38
FIG @ (Tf)
But/Lb
23329.59
Equations
Results
HHV - (9x1059.7) x (%H2/100)
Btu /Lb
Steam Tables @ (Ta)
21032.63
CORRECTION FOR RELATIVE HUMIDITY: (V.PH2O x Humidity x18) /14.696 x 100x28.85) Air required / ( 1 - Moisture in air) (Lb of Wet air /Lb of fuel required) - (Air required) (H2O formed + (Lb of Moisture/Lb of fuel)+Atomizing Steam)
0.00 16.89 0.05 2.21
Lb of excess air /Lb of fule
(28.85 x %O2) x (N2 formed /28 +CO2/44 + H2O formed /18) (20.95 - %o2) [(1.6028 x (LbH2O / Lb air required)) +1 ]
4.46
% Excess air
(Lb excess air / Lb fuel ) / Air required
Moisture in air Lb/Lb air Lb of Wet air /Lb of fule required Lb of moisture /Lb of fule Lb of H2O /Lb of fule CORRECTION FOR EXCESS AIR :
Total Lb of H2O / Lb of fuel (Corrected for Excess air) [(%excess air/100) x (Lb Moisture / Lb fuel)] + (LbH2O/Lb fuel) Air Sensible heat (Ha) Fuel Sensible heat (Hf)
Btu/Lb of fuel Btu/Lb of fuel
CP
air
CP
fuel
x(Ta -Td) x(Lb air/Lb fuel) x(Tf -Td)
26.46 2.22 113.66 13.99
NET RESULTS : Qr Btu/Lb (fuel) Net thermal efficiency Gross thermal efficiency
1.5 / 100 x LHV (e) % (egross)
%
315.49
[(LHV + Ha + Hf + Hm) -- (Qr +Qs)] / [(LHV + Ha+ Hf + Hm)] x 100 [(LHV + Ha + Hf + Hm) -- (Qr +Qs)] / [(HHV + Ha+ Hf + Hm)] x 100
86.82 78.32
Stack Loss at Exit flue gas (Te) Component CO2 Water Vapor N2 Air Total
Lbcomp.formed/Lb fuel 2.7313670012 2.2246786456 12.9468085785 4.4568036556 22.3596578809
Enthalpy Btu/Lb 90 190 105 100 485
Qs Btu/Lb of fuel 245.8230301079 422.6889426628 1359.4149007439 445.6803655566 2473.6072390712
Fuel oil
DATA INPUT Ambient air Temp. (Ta) Flue Gas Temp. (Te) Fuel oil Gas Temp. (Tf) Atomizing Steam Temp. (Tm) Design datum Temp. (Td)
°C °C °C °C °C Lb/in2 g Lbs/Lbf
But/Lb
25 273 100 185.56 15.55 50 0 90 4.2 21 7.35 18000
Lb/in2
0 0 1.14 0 1.14 0.07
Steam Tables @ (Ta)
But/Lb
0.24
FIG @ (Ta)
But/Lb
0.55
Enthalpy (hm)
But/Lb
1195.5
Enthalpy (hd)
But/Lb
1087.7
FIG @ (Tf) Steam Tables @ (Tm) Steam Tables @ (Td)
ITEMS Total Impurities (Wt%) % H2 %C LHV Btu /Lb
Equations SUM Of Impurities (from analysis (100 - Wt% impurities) / (C/H + 1) (100 -( % H2 +% impurities)
Pressure of steam Quantity of Atomizing Steam Humidity O2 °API of fuel oil C/H HHV Impurities (Wt%) Water Vapor Ash S Other Total VAPOR Pressure (Water)
Cpair Cpfuel
HHV - (9x1059.7) x (%H2/100)
Results 1.14 11.8395209581 87.0204790419 16870.829367665
CORRECTION FOR RELATIVE HUMIDITY:
(V.PH2O x Humidity x18) /14.696 x 100x28.85)
Moisture in air Lb/Lb air Lb of Wet air /Lb of fule required Lb of moisture /Lb of fule Lb of H2O /Lb of fule
Air required / ( 1 - Moisture in air) (Lb of Wet air /Lb of fuel required) - (Air required) (H2O formed + (Lb of Moisture/Lb of fuel)+Atomizing Steam)
0.0027 14.1628436229 0.0378807487 1.0963339223
CORRECTION FOR EXCESS AIR :
Lb of excess air /Lb of fule
(28.85 x %O2) x (N2 formed /28 +CO2/44 + H2O formed /18) (20.95 - %o2) [(1.6028 x (LbH2O / Lb air required)) +1 ]
% Excess air
(Lb excess air / Lb fuel ) / Air required
Total Lb of H2O / Lb of fuel (Corrected for Excess air)
[(%excess air/100) x (Lb Moisture / Lb fuel)] + (LbH2O/Lb fuel)
Air Sensible heat (Ha) Fuel Sensible heat (Hf)
Btu/Lb of fuel Btu/Lb of fuel
Atomizing Sensible heat (Hm)
Btu/Lb of fuel
CP air x(Ta -Td) x(Lb air/Lb fuel) CP fuel x(Tf -Td) (Hm - Hd) x Lb steam /Lb fuel
3.7778082084
26.7456151359 1.1064653616 73.2409170364 83.6055 0
NET RESULTS : Qr
Btu/Lb (fuel)
Net thermal efficiency Gross thermal efficiency
2.5 / 100 x LHV (e) % (egross)
%
421.7707341916
[(LHV + Ha + Hf + Hm) -- (Qr +Qs)] / [(LHV + Ha+ Hf + Hm)] x 100 [(LHV + Ha + Hf + Hm) -- (Qr +Qs)] / [(HHV + Ha+ Hf + Hm)] x 100
83.3541117121 78.1703362443
Stack Loss at Exit flue gas (T e)
Lbcomp.formed/Lb fuel
Enthalpy Btu/Lb
Qs Btu/Lb of fuel
CO2
3.2077495329
110
352.8524486228
Water Vapor
1.1064653616
225
248.9547063536
N2
10.8599441198
125
1357.4930149701
Air
3.7778082084
120
453.3369850131
Total
18.9519672227
580
2412.6371549595
Component
OIL FIRED HEATER FUEL COMPONENT C H2 O2 N2 CO CO2 METHANE ETHANE ETHYLENE PROPANE PROPYLENE BUTANE BUTYLENE PENTANE HEXANE SULFUR H2S INERTS TOTAL / Lb Of Fuel
A weight Fraction
B M.wt
85 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100
12 1 0 0 0 0 14.53 2.56 0 1.53 0 0.55 0.27 0.73 0.06 32 0 0
D=(A X B) Tatol Weight Lb 0.8702047904 0.1183952096 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0114 0 0 1
C (D X C) Net Heating Value Heating Value Btu/Lb Btu 14100 12269.8875449 51600 6109.19281437 0 0 0 0 4345 0 0 0 21500 0 20420 0 20290 0 19390 0 19690 0 19670 0 19420 0 19500 0 19390 0 3940 44.916 6550 0 0 0 259805
E Air Reqired Lbair /Lb 11.51 34.29 -4.32 0 2.47 0 17.24 16.09 14.79 15.68 14.79 15.46 14.79 15.33 15.24 4.31 6.08 0 193.75
(D X E) Air Reqired Lb 10.01605714 4.059771737 0 0 0 0 0 0 0 0 0 0 0 0 0 0.049134 0 0 14.12496287
F CO2 Formed Lb Co2/Lb 3.66 0 0 0 1.57 1 2.74 2.93 3.14 2.99 3.14 3.03 3.14 3.05 3.06 2 1.88 0 37.33
(D X F) CO2 Formed Lb 3.184949533 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0228 0 0 3.207749533
G H2O Formed Lb H2O/Lb 0 8.94 0 0 0 0 2.25 1.8 1.28 1.63 1.28 1.55 1.28 1.5 1.46 0 0.53 0 23.5
(D X G) H2O Formed Lb 0 1.058453174 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1.058453174
H N2 Formed Lb N2/Lb 8.85 26.36 -3.32 1 1.9 0 13.25 12.37 11.36 12.05 11.36 11.88 11.36 11.78 11.71 3.31 4.68 0 149.9
(D X H) N2 Formed Lb 7.701312395 3.120897725 0 0 0 0 0 0 0 0 0 0 0 0 0 0.037734 0 0 10.85994412
Fuel gas
Efficiency of Fired Heater DATA INPUT Ambient air Temp. (Ta) Flue Gas Temp. (Te) Fule oil Gas Temp. (Tf) Atomizing Steam Temp. (Tm) Design datum Temp. (Td)
°C °C °C °C °C Lb/in2 g Lbs/Lbf
Pressure Quantity of Atomizing Steam Humidity O2 VAPOR Pressure (Water)
Cpair Cpfuel gas HHV
ITEMS LHV
Lb/in2
25.00 241.00 36.00 0.00 15.55 0.00 0.00 90.00 4.05 0.07
But/Lb
0.31
FIG @ (Ta)
But/Lb
0.38
FIG @ (Tf)
But/Lb
23329.59
Equations
Results
HHV - (9x1059.7) x (%H2/100)
Btu /Lb
Steam Tables @ (Ta)
21032.63
CORRECTION FOR RELATIVE HUMIDITY: (V.PH2O x Humidity x18) /14.696 x 100x28.85) Air required / ( 1 - Moisture in air) (Lb of Wet air /Lb of fuel required) - (Air required) (H2O formed + (Lb of Moisture/Lb of fuel)+Atomizing Steam)
0.00 16.89 0.05 2.21
Lb of excess air /Lb of fule
(28.85 x %O2) x (N2 formed /28 +CO2/44 + H2O formed /18) (20.95 - %o2) [(1.6028 x (LbH2O / Lb air required)) +1 ]
4.46
% Excess air
(Lb excess air / Lb fuel ) / Air required
Moisture in air Lb/Lb air Lb of Wet air /Lb of fule required Lb of moisture /Lb of fule Lb of H2O /Lb of fule CORRECTION FOR EXCESS AIR :
Total Lb of H2O / Lb of fuel (Corrected for Excess air) [(%excess air/100) x (Lb Moisture / Lb fuel)] + (LbH2O/Lb fuel) Air Sensible heat (Ha) Fuel Sensible heat (Hf)
Btu/Lb of fuel Btu/Lb of fuel
CP
air
CP
fuel
x(Ta -Td) x(Lb air/Lb fuel) x(Tf -Td)
26.46 2.22 113.66 13.99
NET RESULTS : Qr Btu/Lb (fuel) Net thermal efficiency Gross thermal efficiency
1.5 / 100 x LHV (e) % (egross)
%
315.49
[(LHV + Ha + Hf + Hm) -- (Qr +Qs)] / [(LHV + Ha+ Hf + Hm)] x 100 [(LHV + Ha + Hf + Hm) -- (Qr +Qs)] / [(HHV + Ha+ Hf + Hm)] x 100
86.82 78.32
Stack Loss at Exit flue gas (Te) Component CO2 Water Vapor N2 Air Total
Lbcomp.formed/Lb fuel 2.7313670012 2.2246786456 12.9468085785 4.4568036556 22.3596578809
Enthalpy Btu/Lb 90 190 105 100 485
Qs Btu/Lb of fuel 245.8230301079 422.6889426628 1359.4149007439 445.6803655566 2473.6072390712
