The group's energy consuption
The Group's energy consumption
Total direct and indirect energy consumption amounted to about 12,300 TJ, an increase of about 2% compared to 2017. The increase was due to the increase in direct consumption (Table no. 58) – which involves the use of primary sources for the operation of the production system – in particular the energy produced by the hydroelectric power plants, the CAR power plant in Tor di Valle and, to a lesser extent, also by the waste-to-energy plants, almost entirely offset by the decrease in indirect consumption, which includes the losses that occur in the Rome electrical grid, attributable to the transformation and transport phases (Table no. 59). The latter, in fact, have fallen by about 5%, thanks mainly to lower consumption of public lighting due to the numerous replacements of traditional lamps with LED systems, but also thanks to a slight decrease in technical losses of the grid (-3%) and a decrease in global electricity consumption for the distribution of potable/non-potable water.
It should also be pointed out that, for the second year running, the electricity consumption of the main companies, and in particular consumption linked to waste management plants, the distribution of drinking and non-drinking water, purification and consumption for the work sites, for a total of approximately 422,000 GWh, was certified as coming from renewable sources (certification by means of the Guarantees of Origin - GOs). (Table no. 59).
Trends in energy consumption intensity indices are shown in Table no. 60.
TABLE NO. 58 - DIRECT ENERGY CONSUMPTION OF THE MAIN COMPANIES IN THE GROUP (2016-2018)
|ENERGY PER SOURCE||TJ (GWh)|
|RDF/SSF and pulper (waste to energy) - renewable share||3,198.9 |
|biogas (100% renewable)||169.9 |
|RDF/SSF and pulper (waste to energy) - non-renewable share||2,952.8 |
|methane (for electricity generation, district heating,|
water area dryers and heating for offices)
|fuel oil (for electricity generation and for heating offices)||34.5 |
|petrol (road haulage)||4.9 |
|diesel (road haulage) (*)||61.6 |
|LPG (heating)||0.8 |
(*) The figures for diesel consumption for road transport in 2017 and 2018 include Aquaser heavy vehicles
NB: The energy produced by the Group plants and fed into the network is illustrated in the Environmental Accounts (Products - Energy Segment).
TABLE NO. 59 - INDIRECT ENERGY CONSUMPTION OF THE MAIN COMPANIES IN THE GROUP (2016-2018)
|TYPES OF INDIRECT CONSUMPTION - TJ (GWh)||2016||2017||2018|
|electrical energy losses on the distribution networks and transport||1,283.8|
|plosses and self-consumption in the production of electrical energy (*)||209.8|
|losses of heat in the district heating network||86.2|
|consumption for public lighting||604.3|
|electrical consumption for waste management plants (**)||19.7|
|electricity consumption for distribution of drinking|
and non-drinking water (*) (***)
|electricity consumption for effluent purification (*) (***)||681.7|
|consumption of electrical energy for the offices (**)||35.7|
|total indirect energy consumption||3,767.5|
(*) Following adjustments, some data for 2016 and 2017 have been modified with respect to the published figures. There have been minimum adjustments for energy
produced in 2016 and consolidated figures for 2017 (electricity consumed by the distribution of drinking water and by sewerage treatment plants).
(**) GO-certified energy (Guarantee of Origin).
(***) 90% of the energy used is GO-certified.
Table NO. 60 - ENERGY INTENSITY INDICES (2016-2018)
|energy consumption intensity index||u.m.||2016||2017||2018|
|electrical energy consumed for public lighting per lamp||TJ/lamp||0.0027||0.0019||0.0013|
|total electrical energy consumed by Acea Ato 2, Acea Ato 5|
and Gesesa for water supplied (*)
|electrical energy consumed by Acea Ato 2, Acea Ato 5|
and Gesesa for sewer service per km of sewer network
(*) The decrease in electricity consumption for water delivered in 2018 is mainly due to the higher rainfall of the year compared to 2017. The figures for the previous two years have been corrected with actual results.
Energy consuption outside of the group
Since 2015, Acea has been monitoring energy consumption outside the Group along the supply chain using specific questionnaires. In December 2018 the questionnaire was sent to more than 100 suppliers, the most representative in relation to the orders value for the year. Thanks to the results from 37 of those contacted (equal to 29% of the total Acea expenditure for the procurement of goods/services and works), their total energy consumption was estimated at approximately 318,676 GJ.