Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 146)

IM 11M12D01-01E 8-20
For liquid fuel
Amount of water vapor in exhaust gas (Gw) = (1/100) {1.24 (9h + w)} [m /kg]
Theoretical amount of air (Ao) = {(12.38 / 10000) x H1} — 1.36 [m 3 /kg]
Low calorific power = H1
X value = {(3.37 / 10000) x Hx} — 2.55 [m 3 /kg]
where, H1: low calorific power of fuel
h: Hydrogen in fuel (weight percentage)
w: Moisture content in fuel (weight percentage)
Hx: Same as numeric value of H1
For gaseous fuel
Amount of water vapor in exhaust gas = (1/100) {(h2) + 1/2 ⌺ y (Cy hy) + w} [m /m ]
Theoretical amount of air = 11.2 x (H1/10000) [m /m ]
Low calorific power = H1
X value = (1.05 / 10000) x Hx [m /m ]
where, H1: low calorific power of fuel
h: Hydrogen in fuel (weight percentage)
w: Moisture content in fuel (weight percentage)
Hx: Same as numeric value of H1
For solid fuel
Amount of water vapor in exhaust gas (Gw) = (1/100) {1.24 (9h + w)} [m /kg]
Theoretical amount of air = {(1.01 x (H1 / 1000)} + 0.56 [m /kg]
Low calorific power = H1 = Hh — 25 (9h + w) [kJ/kg]
X value = 1.11 - (0.106 / 1000 ) x Hx [m /m ]
where, w: Total moisture content in use (weight percentage)
h: Hydrogen content (weight percentage)
The average hydrogen content of coal mined in Japan, which is a dry ash-free type, is
5.7 percent. Accordingly, "h" may be expressed mathematically by:
h = 5.7 [{100 — (w + a)} / 100] x (100 — w) / (100 — w1)
where, a: Ash content [%]
w1: Moisture content [%], analyzed on a constant humidity basis
Hh: Higher calorific power of fuel [kJ/kg]
H1: Low calorific power of fuel [kJ/kg]
Hx: Same numeric value of H1
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