<8. Detailed Data Setting>
8-20
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
8.7.3 Setting Fuels
n Input Parameters
The analyzer calculates the moisture content contained in exhaust gases. The following sets
forth the fuel parameters necessary for calculation and their entries. The moisture content may
be mathematically expressed by:
(water vapor caused by combustion and water vapor contained in the exhaust gas)
Moisture content =
= (Gw + Gw1)/G x 100
=
where,
Ao : Theoretical amount of air per unit quantity of fuel, m
3
/kg (or m
3
/m
3
) ... 2 in Table 8.15
G: Actual amount of exhaust gas (including water vapor) per unit quantity of fuel, m
3
/kg (or m
3
/m
3
)
Gw : Water vapor contained in exhaust gas per unit quantity of fuel (by hydrogen
and moisture content in fuel), m
3
/kg (or m
3
/m
3
) ............ 1 in Table 8.15
Gw1: Water vapor contained in exhaust gas per unit quantity of fuel (moisture content
in air), m
3
/kg (or m
3
/m
3
)
Go: Theoretical amount of dry exhaust gas per unit quantity of fuel, m
3
/kg (or m
3
/m
3
)
m: Air ratio
X : Fuel coefficient determined depending on low calorific power of fuel, m
3
/kg (or m
3
/m
3
) ....... 3 in Table 8.15
Z : Absolute humidity of the atmosphere, kg/kg ....... Figure 8.16
X + Ao x m
Gw + (1.61 x Z x m x Ao )
actual exhaust gas (including water vapor) per fuel
+ (water vapor contained in air for combustion)
x 100
Gw + (1.61 x Z x m x Ao)
Go + Gw + [(m - 1) Ao + (1.61 x Z x m x Ao)]
x 100
x 100
..... Equation 1
............ Equation 2
Ao, Gw and X shown in Table 8.14. If there are no appropriate fuel data in Table 8.14, use the
graph for the absolute humidity indicated by a dry and wet bulb hygrometer.
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