...
Q753.
...
How
...
do
...
I
...
use
...
Equation
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C-2b
...
to
...
calculate
...
the
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annual
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average
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high
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heating
...
value
...
(HHV)
...
of
...
my
...
fuel
...
if
...
the
...
rule
...
requires
...
sampling
...
less
...
frequently
...
than
...
monthly?
...
A753. You use the HHV and fuel quantity values that represent the less frequent sampling period (i.e. quarterly, semiannually) in place of the monthly values that are normally used in Equation C-2b. Two examples are provided below.
Example 1: Natural gas fuel is sampled semiannually and the results for the first and second semiannual periods are 1,020 Btu/scf and 980 Btu/scf, respectively, and the respective semiannual fuel quantities are 1,000 scf and 2,500 scf. You would calculate the annual average HHV using Equation C-2b as follows:A753. You use the HHV and fuel quantity values that represent the less frequent sampling period (i.e. quarterly, semiannually) in place of the monthly values that are normally used in Equation C-2b. Two examples are provided below.
(HHV)annual = [((1,020 Btu/scf) x (1,000 scf) + (980 Btu/scf) x (2,500 scf))/3,500 scf] = 991 Btu/scf
...
(HHV)annual = [((990 Btu/scf) x (1,000 scf) + (980 Btu/scf) x (2,500 scf))/3,500 scf] = 983 Btu/scf
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Source: M. Hannan, 5/10/2013.
Approval / Publishing History: Version 1, Approved by M. Hannan, 5/10/2013
Expiration: none
Relevant Subparts: Subpart C
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