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Ozonlagsnedbrydende stoffer og drivhusgasser - 2000

2 Summary and conclusions

2.1 Ozone depleting substances

The ODP-weighted consumption in 2000 has been calculated to be approx. 83.9 ODP-tons which is a slight reduction of 1.4 ODP-tons compared to 1999 where the consumption was 85.3 ODP tons.

Seen from the distribution of the ODP-weighted consumption in 2000 on various substances, the contribution is mostly from HCFC-14lb and HCFC-22.

The figure below shows the ODP-weighted consumption calculated on the basis of information on import from importers and manufacturers. The ODP-values are listed in Appendix 1, table 1.a.

Table 2.1
Overview of consumption and ODP-weighted consumption in 2000, tons.

CFCs, tetrachlormethan and trichlorethan are used only for laboratory uses. HCFCs are used as refrigerant or for foaming. The range of application for HCFCs in 2000 are shown in table 2.2.

Table 2.2
Distribution of the HCFC-consumption in range of application in 2000, tons

HCFC 22 is used as refrigerant and HCFC-141b and HCFC-142b is used only for foaming.

In figure 2.1 is shown the development of the ODP-weighted consumption.

Figure 2.1
Development of the ODP-weighted consumption.

The specific consumption figures related to each substances and groups as well as the calculated ODP-weighted consumption for the period 1986-2000 is shown in Chapter 4, table 4.1.

2.2 Greenhouse gases

The GWP-weighted actual emission for HFC's, PFC's and SF₆ for 2000 has been calculated to approx. 818,000 tons CO₂-equivalents. Compared to the total Danish GWP-contribution, the emission of HFC's, PFC's and SF₆ is below 1% of the total emission ref. /14,15/. The similar emission was approx. 700,000 ton CO₂-equivalents in 1999. It corresponds to a total increase of 120,000 ton CO₂-equivalents.

The reason for the increase is higher HFC-emission from stock from products as well as an overall larger consumption of HFC's, including especially HFC-134a and HFC-404a.

In the following table 2.3 consumption, the actual emission and stock from products are summarized.

Table 2.3
C0nsumption, actual emission, installed substance, regulated for import/export as well as GWP-emissions 2000, tons.

In the following figure 2.2 the total GWP-weighted emission from HFC's, PFC's and SF₆ is shown in connection to sources. It appears from the figure, which application provides the largest emissions in 2000.

Figure 2.2
GWP-contribution in % from HFC's, PFC's and SF₆ distributed in sources.

As seen on the figure, the largest GWP-contribution is from emission of refrigerant from commercial stationary refrigerators. These plants represent 54% of the total actual contribution. The contribution is primarily from HFCs and a smaller part from PFC's.

The second largest GWP-contribution of 14% comes from HFC-bases refrigerants for households, partly from A/C. The emission from refrigerants are mainly from isolating foam.

7% of the GWP-contribution derives HFC-emission from manufacturing of soft foam and use of aerosol-spray based on HFC's.

The primary source to SF₆ emissions in 2000 is from the production of thermo window glass with a contribution of 3% of the total GWP-contribu-tion.

The consumption of SF₆ by metal melting contributes by 3%.

HFC-based foam contributes with 2%.

SF₆ - emissions from switches in high-tension works and emission of HFC from shoes have been calculated to approx. 1%. Destruction of shoes with SF₆ is below 1% and emission of PFC from cleaning fluids used in electronics is also below 1% of the total contribution.

HFC's contribute with 90% of the total GWP-weighted amount. The emission of SF₆ was 7% and the emission of PFC's was 3% of the total emission. Compared to 1999 the share of HFC-emissions has increased at the same time as the total emission has increased. The relative distribution of actual emissions is shown in figure 2.3.

Figure 2.3
The relative distribution of the actual emission from HFCs, PFCs and SF_6, 2000.

2.2.1 HFCs

The total use of HFCs is approx. 1,026.9 tons in 2000 which is a small increase of 4% compared to 1999. The consumption of HFCs in general has has increased.

The total GWP-consumption from HFCs is approx. 730,000 tons CO₂-equivalents. It is an increase of approx. 110,000 tons compared to the 1999 contribution.

2.2.2 Sulfur hexafluorid (SF₆)

The consumption of SF₆ was 9 tons in 2000, which is a moderate decrease compared to 1999, whereas the consumption was 12,1 tons. The decreased consumption is due to a decreased use of SF₆ in thermo windows.

The actual emission has been calculated to be 2,5 tons, equivalent to a GWP-contribution of 59,240 tons CO₂ -equivalents. There is a slight fall compared to 1999, where the contribution was 65,250 tons CO₂-equivalents.

2.2.3 Perflourinated hydrocarbons

The consumption of perflourinated hydrocarbons (perflourpropane) was nearly 6.9 tons in 2000 and the emission has been calculated to approx. 4 tons, which derives from filling and current spilling of refrigerants - approx. 6.4 tons, partly from use of PFC cleaning fluid for electronics - approx. 0.5 tons (perflourpropane).

The actual GWP-weighted emission was 28,300 tons CO₂-equivalents in 2000.

2.2.4 Development in the total GWP-weighted potential

Figure 2.4 shows the development in the Danish CWP-contribution 1992-2000 from HFC's, PFC's and SF₆.The relative difference of the calculation of the total GWP-value, seen from the present and earlier calculation methods, is illustrated in the figure.

Figure 2.4
The development of the GWP-weighted potential, actual and new actual emission 1992-1999, 1000 tons CO₂-eq.

The development in the GWP-contribution 1992-2000 can also be seen in table 2.4 below.

Table 2.4
Total GWP-contribution from HFC, PFC, SF₆ 1000 tons CO2 -eq. The total GWP-contribution has been calculated after 3 different calculation methods used during this period ².