3 setting fuels, Averaging – Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 User Manual
Page 134
IM 11M13A01-02E
8-17
8. Detailed Data Setting
8.6.2.2Default Values
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.
Set period over which
average is calculated:
1 h
᭜
Set period over which
maximum and minimum is
stored: 2 4 h
Enter
Averaging
F8.15E.EPS
Figure 8.15 Setting Average-Value Calculation Periods and Maximum- and
Minimum-Value Monitoring Periods
8.6.3
Setting Fuels
8.6.3.1Input 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
quantity may be mathematically expressed by:
Moisture quantity =
= (Gw + Gw1)/G x 100
=
Ӏ{
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
3
/kg (or m
3
) ...
2
in Table 8.8
G: Actual amount of exhaust gas (including water vapor) per unit quantity of fuel,
m
3
/kg (or 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
) ............
1
in Table 8.8
Gw1: Water vapor contained in exhaust gas per unit quantity of fuel (moisture content
in air), m
3
/kg (or m
3
)
Go: Theoretical amount of dry exhaust gas per unit quantity of fuel, m
3
/kg (or m
3
)
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
(water vapor caused by combustion and water vapor contained in the exhaust gas)
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
............ Equation 2
............ Equation 1