Energy consumption

Tables 83-84 illustrate the direct energy consumption of the Group, in other words that which involves the use of primary sources for the functioning of the production system, including the consumption for generation of electricity and heat and the energy used by the vehicle fleet. Table No. 85 by contrast illustrates indirect energy consumption, mainly represented by electricity consumption including the losses which take place during the distribution stage, attributable to transformation and transport losses, fraud and erroneous metering.
In order to express the value of the energy indirectly used in terms of equivalent primary energy, a conversion factor has been considered equal to 37%, which corresponds to Acea 2011 generation efficiency. Imagining having used the Acea electricity plants to produce electricity consumed, one obtains: 

GRI-G3.1 indicator EN4 = 6,265.3/0.37 = 16,933 TJ

Table No. 83 - ACEA VEHICLE FLEET CONSUMPTION (2009- 2011)

vehicle fleet consumption 2009 2010 2011
petrol      
   l 913,102.67 980,754.41 639,227.8
   kg 671,130 720,854 469,832
   TJ 29.5 31.7 20.7
diesel      
    l 954,709.13 788,809.71 566,066.1
   kg 797,182 658,656 472,665
   TJ 33.4 27.6 19.8
NB: the scope of consumption for the vehicle fleet includes Acea SpA, Acea Distribuzione, Acea Reti e Servizi Energetici, LaboratoRI, Acea Produzione, Acea Energia, Acea Ato 2 and Marco Polo.
Table No. 84 – THE ACEA GROUP’S DIRECT ENERGY CONSUMPTION (2009-2011)
[TJ (GWh) (*)] 2009 2010 2011
energy for electricity generation (a) 6,568.5 6,399.3 5,337.5
  (1,824.6) (1,777.6) (1,482.6)
energy for the vehicle fleet (b) 62.9 59.3 40.4
  (17.5) (16.5) (11.2)
energy per heating (c) 19.6 20.1 24.5
  (5.4) (5.6) (6.8)
total net electricity produced and sold (d) 2,795.8 2,763.4 1,815.1
  (776.6) (767.6) (504.19)
net thermal energy sold (e) 221.8 227.2 245.5
  (61.6) (63.1) (68.2)
total direct energy consumption EN3 = (a + b + c) - (d + e) 3,633.4 3,488.1 3,341.8
  (1,009.3) (968.9) (928.3)
NB: the figures for the three-year period include those of A.R.I.A., Acea Reti e Servizi Energetici, Acea Produzione. (*) 1 GWh = 3.6 TJ

Considering that 1 TJ → approximately 23.9 toe, the GRI-G3.1 EN3 indicator = (3,341.8 x 23.9) = 79,869 toe

Table No. 85 – THE ACEA GROUP’S INDIRECT ENERGY CONSUMPTION (2009-2011)

[TJ (GWh) (*)] 2009 2010 2011
electricity losses on the distribution and transportation networks 2,688.1 2,583.4 2,639.2
  (746.7) (717.6) (733.1)
losses and internal consumption for electricity production 200.9 198.4 144.7
  (55.8) (55.1) (40.2)
heat losses on the district heating network 58.0 77.8 59.0
  (16.1) (21.6) (16.4)
consumption for public lighting 543.1 567.9 582.0
  (150.9) (157.7) (161.7)
consumption for drinking and non-drinking water distribution (**) 1,749.2 1,673.3 1,736.3
  (485.9) (464.8) (482.3)
consumption for waste water treatment (**) 1,060.2 1,086.8 1,066.7
  (294.5) (301.9) (296.3)
energy consumption for the offices 42.0 37.2 37.4
  (11.7) (10.3) (10.4)
total indirect energy consumption 6,341.5 6,224.8 6,265.3
  (1,761.5) (1,729.1) (1,740.4)
NB: the figures for the three-year period include the consumption of A.R.I.A., Acea Produzione Acea SpA and the water companies included in the boundaries. (*) 1 GWh = 3.6 TJ (**) Consumption for distribution and treatment includes all the water companies within the reporting boundaries.