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8.6.2.2 Default Values
8.6.3
Setting Fuels
8.6.3.1 Input Parameters
IM 11M12A01-02E
When the analyzer is delivered, or if data are initialized, the average-value calculation
periods and maximum- and minimum-value monitoring periods are by default one hour
and 24 hours respectively.
Averaging
Set period over which
average is calculated:
1 h
Set period over which
maximum and minimum is
stored:
2 4 h
Figure 8.15 Setting Average-Value Calculation Periods and Maximum- and
Minimum-Value Monitoring Periods
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
quantity may be mathematically expressed by:
(water vapor caused by combustion and water vapor contained in the exhaust gas)
+ (water vapor contained in air for combustion)
Moisture quantity =
actual exhaust gas(including water vapor) per fuel
= (Gw + Gw1)/G x 100
Gw + (1.61 x Z x m x Ao)
=
Go + Gw [(m - 1) Ao + (1.61 x Z x m x Ao)]
{ Gw + (1.61 x Z x m x Ao } / { X + Ao x m} x 100
where,
Ao : Theoretical amount of air per unit quantity of fuel, m
G: Actual amount of exhaust gas (including water vapor) per unit quantity of fuel,
3
3
m
/kg (or m
)
Gw : Water vapor contained in exhaust gas per unit quantity of fuel (by hydrogen
and moisture content in fuel), m
Gw1: Water vapor contained in exhaust gas per unit quantity of fuel (moisture content
3
3
in air), m
/kg (or m
Go: Theoretical amount of dry exhaust gas per unit quantity of fuel, m
m: Air ratio
X : Constant determined depending on low calorific power of fuel ....... (3) in Table 8.8
Z : Absolute humidity of the atmosphere ....... Figure 8.17
Enter
F8.15E.EPS
3
3
/kg (or m
)
)
8. Detailed Data Setting
..... Equation 1
x 100
............ Equation 2
x 100
3
3
/kg (or m
) ... (2) in Table 8.8
............(1) in Table 8.8
3
3
/kg (or m
)
8-17
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