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In a boiler Natural gas flow 10,000 N cubic meter and
combustion air flow 22,000 cubic meter, how I convert gas
flow N cubic meter to cubic meter to maintain fuel air ratio?
Thank you.
ashekullah
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Answer Posted / c.sudhir
Generally the aiAir to fuel ratio will be 1.3.5 , so t
based on the calarafic value of the Fuel the Air ratio is
maintained , so iam here by writing the calcualation part
with Example .
GENERAL CALCULATION
1. Specific steam should be produced per kg of
briquette.
= …………CV…(Calorific value of
Briquette.)…………
Specific Fuel Enthalpy –
Feed water temperature ( or Enthalpy of Feed water )
Exp: = 4200 KCAL/ KG (BRIQUETTS)
(663-62)
= 6.9 kg of steam / Kg of briquette
1kg of briquette = 6.9kg of steam
2. Specific Fuel consumption per actual
Briquett Burned.
= TOTAL STEAM
PRODUCED
TOTAL
BRIQUETTS CONSUMED (OR)
= TOTAL WATER
CONSUMED
TOTAL
BRIQUETTS COMSUMED
Exp: = 13094KG = 3.2 hs of
STEAM
4186 hs
= 17540 Kg = 4.1kg /STEAM
4186kg
Efficiency of Boiler = Actual /
Standard = 4.1/6.9= 0.59x100= 59%
ACTUAL CALCULATION
= STEAM GENERATED (SP ENTHALPY OF STEAM AT Std
Pressure – FEED WATER Temp
CALALARAFIC VAIVE * FUEL CONSUMED (S.F.C)
ExP: = 13094 ( 663-62) = 0.448100 =44%
4200 *4186Reg.,
C.Sudhir
| Is This Answer Correct ? | 1 Yes | 4 No |
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