Ozone layer

Ozone layer

OTE is gradually replacing old cooling systems operating with ozone depleting substance (ODS) as refrigerants, while fire suppression systems use suppressants with zero ozone depleting potential (ODP1).

The ODS (i.e. R22) quantity being replenished in the existing cooling systems for 2010 in the regions of Attica, Northern Greece and Southern & Western Greece amounted at 193 kg ODP (of which 79 kg ODP in Attica). The corresponding quantities replenished in 2009 for Attica were 162 kg, i.e. a 50% decrease of the ODS quantities being replenished is observed.

Currently, HFC blends are utilized either for substituting ODS or for installation in new cooling systems. The quantity replenished for 2010 in the regions of Attica, Northern Greece and Southern & Western Greece (about 3,100 kg of refrigerants) is equivalent to GHG emissions of 5,060 t CO2 eq approximately2.

1Ozone depleting potential is measured as R12 equivalent. The calculation of ODP for R22 is based on a factor of 0.055.
2Emissions of 1,550 t CO2 eq reported in the CR report for 2009 referred only to the region of Attica.