Setting Fuels - YOKOGAWA ZR22G User Manual

8.7.3

Setting Fuels

Input Parameters
n
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
G: Actual amount of exhaust gas (including water vapor) per unit quantity of fuel, 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
in air), m 3 /kg (or m
Go: Theoretical amount of dry exhaust gas per unit quantity of fuel, m
m: Air ratio
X : Fuel coefficient determined depending on low calorific power of fuel, m
Z : Absolute humidity of the atmosphere, kg/kg ....... Figure 8.16
Fill in the boxes with fuel parameters in Equation 2 above to calculate the moisture content. Use
Ao, Gw and X shown in Table 8.14. If there are no appropriate fuel data in Table 8.14, use the
Figure 8.14 equations for calculation. Find the value of "Z" in Equations 1 and 2 using Japanese
Standard JIS B 8222. If a precise measurement is not required, obtain the value of "Z" using a
graph for the absolute humidity indicated by a dry and wet bulb hygrometer.
+ (water vapor contained in air for combustion)
actual exhaust gas (including water vapor) per fuel
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
3 /kg (or m
3 /m 3 )
<8. Detailed Data Setting>
x 100
............ Equation 2
x 100
x 100
3 /kg (or m 3 /m 3 ) ... 2 in Table 8.15
3 /m 3 ) ............ 1 in Table 8.15
3 /kg (or m
3 /kg (or m
..... Equation 1
3 /kg (or m 3 /m 3 )
3 /m 3 )
3 /m 3 ) ....... 3 in Table 8.15
IM 11M12G01-02EN 1sh Edition : Mar. 25, 2021-00
8-20