Revision of Methodology and Estimated Emissions of Fluorinated Greenhouse Gases in Sweden

In the year 2000 the first emission inventory of fluorinated greenhouse gases (HFCs, PFCs and SF6) was compiled for Sweden. During the following years additional information has become available, indicating that an update of the way of utilizing background data, and of the calculation methodology was necessary.

Activity data used for calculating emissions from the categories stationary refrigeration (HFCs and PFCs) and electrical insulation (SF6) have been revised in cooperation with Product Register staff at the Swedish Chemicals Inspectorate. Furthermore, national calculation methodologies for emissions from semi-conductor manufacture and from foam blowing were studied in relation to the descriptions in IPCC Good Practice Guidance (2000). The result from these comparisons was that the methodology for calculating emissions from semi-conductor manufacture was revised according to the Tier 1 methodology given in IPCC Good Practice Guidance, while the national method for calculating emissions from foam blowing was retained.

Due to improved information during the course of the work, revisions of emission calculations were also made for mobile air conditioning and for metered dose inhalers. Additionally, from the improved information on fluorinated substances followed that the reporting of potential emissions, where previously only 1995 to 2003 were covered, could be made complete for the whole time series, 1990-2004.

The various improvements introduced into the calculations have together resulted in increased emissions estimates of fluorinated greenhouse gases in Sweden. The increases are substantial, approximately 30-40% in later years, calculated as CO2-equivalents. The largest single contributing factor to this increase in actual emissions is the use of the improved statistics from the Product Register as complementary input data for stationary refrigeration and air conditioning equipment.

Even though several essential improvements were made during the course of the project, some issues remain to be solved. These especially apply to the circumstances concerning decommissioning of products. There are also still some uncertainties associated with the quantification of exported amounts of chemicals fromSweden.