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Gas Turbine Handbook : Principles and Practices

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-55<br />

Parameters Units 1/0 .88/.12 .66/.34 .55/.45 .44/.56 .33/.67 .22/.78 .11./89 .945<br />

Molecular Weight<br />

Lower Heating Value<br />

Lower Heating Value<br />

lb<br />

mol 16.04 17.48 20.11 21.43 22.75 24.07 25.38 26.7 27.36<br />

Btu<br />

lb 21,506 17,369 11,321 8854 6673 4731 2990 1421 694<br />

Btu<br />

scf 909 800 600 500 400 300 200 100 50<br />

Adiabatic Temperature 1924 1887 1841 1795 1729 1629 1457 1090 686<br />

Rise, ∆T ab<br />

stoich<br />

°C<br />

Stoich Air/Fuel Ratio<br />

Fuel Flow Mass Ratio<br />

Wobbe Index<br />

LHV<br />

M <strong>Gas</strong><br />

M Air<br />

Fuel Flow Volume Ratio<br />

lb<br />

lb 17.24 13.92 9.07 7.1 5.35 3.79 2.4 1.14 0.556<br />

(Btu/lb)<br />

Btu/lb CH 4 1 1.24 1.9 2.43 3.22 4.56 7.19 16.13 30.99<br />

Btu<br />

scf 1222 1030 720 581 451 329 214 104 51.4<br />

(Wobbe)<br />

Wobbe CH 4<br />

1 1.19 1.7 2.1 2.71 3.71 5.71 11.76 23.77<br />

Limit of Flammability % Vol. 5 5.68 7.58 9.18 11.86 16.15 24.23 NF NF<br />

Lower, L 25<br />

Limit of Flammability % Vol. 15.5 15.36 19.15 21-59 24.27 29.15 35.23 NF NF<br />

Higher, U 25<br />

Limit of Flammability 3.1 2.7 2.53 2.35 2.05 1.805 1.45 — —<br />

Ratio- U 25 /L 25<br />

Appendix C 365<br />

Table C-7-2. Properties of CH 4 /N 2 <strong>Gas</strong>es.

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