Other atmospheric emissions

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Several refrigerating gases affect the environment since they damage the ozone layer, due to their greenhouse effect, or because they entail both of these effects. In the 2009-2011 period, Terna gradually extended its monitoring of the refrigerating gases contained in its equipment. The extension of the recording boundary included equipment that operates non-stop for the security of the electricity service and requires a larger number of cooling systems to maintain the temperature constant. In 2010, the monitoring of the refrigerating gases contained in Terna’s equipment was extended to all corporate headquarters and local operating areas.

REFRIGERATING GASES – QUANTITIES KG 2011 2010 2009
R22 2,972 4,716 4,380
R407C 2,470 1,647 817
R410A 2,973 494 334
Other refrigerating gases (1) 686 210 6

(1) The quantity of “Other refrigerating gases” for 2011 regards by 80% the Rr134a gas, which is present in the headoffice in Rome.

Among the gases contained in Terna’s equipment, only R22 has harmful effects on both the ozone layer and the greenhouse effect. The other types of gases present do not have any effect on ozone, but only a potential greenhouse effect.

For the R22 gas, the reading also includes consumption and implies an overestimate of the gas actually released into the atmosphere.

Actually, consumption includes the quantity of new gas injected in equipment during maintenance work, which consists initially in the controlled emptying of the above-mentioned equipment. These consumption quantities, which can represent 40% of the total, do not reflect actual atmospheric emissions with effects on the environment.

EN19

REFRIGERATING GASES – CONSUMPTION KG 2011 2010 2009
R22 23 221 1,017

The 2011 figure shows a substantial decrease in R22 consumption with respect to 2010-2009, reflecting the program for eliminating the gas in line with the restrictions introduced by the European regulations on the use of substances that reduce the ozone layer (EC Regulation n. 1005/2009 of the European Parliament and the Council).