C-10 DATA COMPUTATIONS
MON2000
Heating Value Calculations JULY 2010
(b) Ideal Relative Density
where
(c) Real (corrected) Relative Density
The ideal gas relative density, DI is
corrected to the real gas relative
Density, Dr, by dividing by the com-
pressibility factor, Z, for gas mixture at
60 oF and one atmosphere pressure and
multiplying by the compressibility factor
of air at the same conditions:
P total number of components to be used in calcula-
tion of total BTU/CF
“100” removed the “100” factored into the calculation of
the concentration earlier in the analysis
Equation C-8 Ideal Relative Density of Total Gas Sample
RDnrelative Density of component “n”
TOTAL RD relative Density of total gas sample
CONCNn, P, 100 are defined in “1.” preceding
Equation C-9 Real Gas Relative Density
TOTALRD
CONCnRDn
()
n1=
P
∑
100
----------------------------------------------
=
DR
DIZbair()
Zbgas()
---------------------
=