Page 154 - Mechanical Engineer's Data Handbook
P. 154
THERMODYNAMICS AND HEAT TRANSFER 143
Rich mixture
(32p+8q- 16r)
R, = 4.292
(12p+q+ 16r)
4
y=x+-
2
Combustion products (% volume)
Wet analysis U b 37 600n
100- 100-
Y
Y Y Y M,
Dry analysis a b 37 600n
100- 100 - 0
X X Msx
3.16.7 Gaseous fuels
For a mixture of gases such as H,, 0,, CO, CH,, etc.,
let V,, V,, V3, etc., be the percentage by volume of
gases, 1,2,3, etc., containing C, H, and 0,. and V,
V,
are the percentage volumes of N, and CO,.
Let:
c,, c2, c3, etc. = the number of atoms of carbon in each gas
h,, h,, h,, etc.=the number of atoms of hydrogen in each gas
ol, o,, 03, etc. = the number of atoms of oxygen in each gas
And let:
S,=c,V,+c,V,+. . .
Sh=h,V,+h,V,+. , .
S,=o,V,+o,V,+. . .
'h
k = S, + - + -
4 2
Then:
R,=--; k R=R,(i+k)
21
so Sh
x= 100R+---+ V"
2 4