BS 7859:1996
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Natural gas. Calculation of calorific values, density, relative density and Wobbe index from composition
Hardcopy , PDF
01-31-2007
English
03-15-1996
Committees responsible
National foreword
Method
1 Scope
2 Definitions
3 Principle
4 Behaviour of ideal and real gases
5 Calculation of calorific value on a molar basis
6 Calculation of calorific value on a mass basis
7 Calculation of calorific value on a volumetric
basis
8 Calculation of relative density, density and
Wobbe index
9 Accuracy
10 Tables of recommended data
Annexes
A (normative) Symbols and units
B (normative) Values of auxiliary constants, etc
C (informative) Conversion of volume fractions to
mole fractions
D (informative) examples of calculations
E (informative) Behaviour of ideal and real gases
F (informative) Effects of water vapour on calorific
value
G (informative) Summary, discussion and selection
of the calorific value of methane
H (informative) Derivation of equations relating
to precision
J (informative) Approximate conversion factors
between reference states
K (informative) Computer implementation of
recommended methods
L (informative) Calorific values on a molar basis
for 60 Deg F reference temperature
M (informative) Bibliography
Tables
1 Molar mass for components of natural gases
2 Compression factors and summation factors for
components of natural various metering
reference conditions
3 Calorific values for components of natural gases at
various combustion reference conditions for the
ideal gas on a molar basis
4 Calorific values for components of natural gases
at various combustion reference conditions for the
ideal gas on a mass basis
5 Calorific values for components of natural gases
at various combustion and metering reference
conditions for the ideal gas on a volumetric basis
B.1 Critical properties
B.2 Molar composition of dry air
D.1 Details of an example of a property calculation
D.2 Details of an example of a precision calculation
G.1 Calorific value of methane: molar basis
G.2 Calorific value of methane: mass basis
G.3 Calorific value of methane: volumetric basis
J.1 Conversion factors for calorific values
J.2 Conversion factors for densities, relative
densities and compression factor
J.3 Conversion factors for calorific values and
Wobbe index
K.1 Example of a retyped printout
L.1 Calorific values for components of natural gas at
60 Deg F for the ideal gas on a molar basis
Figure
1 Calorific value on a volumetric basis - Metering
and combustion reference conditions
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