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Parameters Units 1/0 .9/.1 .8/.2 .7/.3 .6/.4 .5/.5 .4/.6 .3/.7 .2/.8 .1/.9 0/1<br />

Molecular Weight<br />

Lower Heating Value<br />

Lower Heating Value<br />

lb<br />

mol 2.02 3.02 4.82 6.22 7.63 9.03 10.43 11.83 13.24 14.64 16.04<br />

Btu<br />

lb 51,579 37,466 31,565 28,324 26,275 24,862 23,830 23,042 22,421 21,919 21,504<br />

Btu<br />

scf 274 338 401 464 528 592 655 719 782 846 $09<br />

Adiabatic Temperature<br />

Rise, ∆T ab °C 2103 2052 2018 1994 1977 1963 1952 1943 1936 1929 1924<br />

stoich<br />

Stoich Air/Fuel Ratio<br />

lb<br />

lb 34.3 26.3 22.9 21.1 19.9 19.1 18.6 18.1 17.76 17.5 17.23<br />

Fuel Flow Mass Ratio<br />

Wobbe Index<br />

LHV<br />

M Gas<br />

M Air<br />

Fuel Flow Volume Ratio<br />

(Btu/lb)<br />

Btu/lb CH 4 0.42 0.57 0.68 0.76 0.82 0.86 0.90 0.93 0.96 0.98 1<br />

Btu<br />

scf 1039 982 982.8 1002 1029 1059 1091 1124 1157 1189 1221<br />

(Wobbe)<br />

Wobbe CH 4<br />

1.18 1.24 1.24 1.22 1.19 1.15 1.12 1.09 1.06 1.03 1<br />

Limit of Flammability % Vol. 4 4.08 4.17 4.26 4.35 4.44 4.55 4.65 4.76 4.88 5<br />

Lower, L 25<br />

Limit of Flammability % Vol. 75 53.57 41.67 34.09 28.85 25 22.06 19.74 17.86 16.3 15<br />

Higher, U 25<br />

Limit of Flammability 18.75 13.13 9.99 8 6.63 5.63 4.85 4.25 3.75 3.34 3<br />

Appendix C 367<br />

Table C-7-4. Properties of H 2 /CH 4 Gases.

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