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

cedure consisted of a check of the input data for the model for each substance. As regards the
HFCs this checking was done according to their trade names. Conversion was made to the HFCs
substances used in the CRF tables etc. A QC was that emission of the substances could be calculated
and checked comparing results from the substances as trade names and as the "no-mixture"
substances used in the CRF.
4.6.4.3 Emission factors check
Emission factors used for the Tier 2a (bottom-up) method should be based on country-specific
studies. Inventory agencies should compare these factors with the default values. They should
determine if the country-specific values are reasonable, given similarities or differences between
the national source category and the source represented by the defaults. Any differences between
country specific factors and default factors should be explained and documented.
Country specific emission factors are explained and documented for MAC and commercial refrigerants
and SF 6 in electric equipment. Separate studies have been carried out and reported. For
other sub-source categories, the country specific emission factors are assessed to be the same as the
IPCC default emission factors.
4.6.4.4 Emission check
As the F-gas inventory is developed and made available in full in spreadsheets, where HFCs data
are for trade names, special procedures are performed to check the full possible correctness of the
transformation to the CRF-format through Access databases.
4.6.5 Recalculations
For year 2002 a minor recalculation has taken place due to new knowledge of a part of the SF6 emission categorisation under "laboratories". Further, for 2002 PFC and HFC-emissions with even
much less changes, have been recalculated due to corrections of small mistakes in transformation
of data from the F-gas model to the databases.
4.6.6 Planned improvements
It is planned to improve uncertainty estimates.
4.7 Uncertainty
The source-specific uncertainties for industrial processes are presented in Table 4.14. The uncertainties
are based on IPCC combined with assessment of the individual processes.
The producer has delivered the activity data for production of cement as well as calculated the
emission factor based on quality measurements. The uncertainties on activity data and emission
factors are assumed to be 1% and 2%, respectively.
The activity data for production of lime and bricks are based on information compiled by Statistics
Denmark. Due to many producers and a variety of products the uncertainty is assumed to be 5%.
The emission factor is partly based on stoichiometric relations and partly on an assumption of
number of yellow bricks. The last assumption has been verified (see Section 4.2.3). The combined
uncertainty is assumed to be 5%.
The producers of glass and glass wool have registered the consumption of carbonate containing
raw materials. The uncertainty is assumed to be 5%. The emission factors are based on stoichiometric
relations and therefore the uncertainty is assumed to be 2%.
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