Denmark's National Inventory Report 2005 - Submitted under the ...

The potential emissions have been calculated as follows:
Potential emission = import + production - export - destruction/treatment.
The substances have been accounted for in the survey according to their trade names, which are
mixtures of HFCs used in the CRF etc. In the transfer to the "pure" substances used in the CRF reporting
schemes the following relations have been used; see Table 4.13.
Table 4.13 Content (w/w%) of “pure” HFC in HFC-mixtures, used as trade names.
HFC mixtures
HFC-32 HFC-125 HFC-134a HFC-143a HFC-152a HFC-227ea
HFC-365 8%
HFC-401a 13%
HFC-402a 60%
HFC-404a 44% 4% 52%
HFC-407a 23% 25% 52%
HFC-410a 50% 50%
HFC-507a 50% 50%
The national inventories for F-gases are provided and documented in a yearly report (Environmental
Protection Agency, 2004; 2005). Furthermore detailed data and calculations are available
and archived in electronic version. The report contains summaries of methods used and information
on sources as well as further details on methodologies.
Activity data is described in a spreadsheet for the current year.
4.6.3 Uncertainties and time-series consistency
The time-series for emission of Halocarbons and SF are presented in Section 4.6.1. The time-series
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are consistent as regards methodology. No potential emission estimates are included as emissions
in the time-series and the same emission factors are used for all years.
There are no appropriate measures of uncertainties established and no uncertainty estimates following
the GPG procedures have been developed so far for the F-gas calculations.
In general uncertainty in inventories will arise through at least three different processes:
A. Uncertainties from definitions (e.g. meaning incomplete, unclear, or faulty definition of an
emission or uptake);
B. Uncertainties from natural variability of the process that produces an emission or uptake;
C. Uncertainties resulting from the assessment of the process or quantity depending on the
method used: (i) uncertainties from measuring; (ii) uncertainties from sampling; (iii) uncertainties
from reference data that may be incompletely described, and (iv) uncertainties from
expert judgement.
Uncertainties due to poor definitions are not expected as an issue in the F-gas inventory. The definitions
of chemicals, the factors, sub-source categories in industries etc. are well defined.
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