Direct and Indirect Energy Consumption

As already mentioned in Energy Saving, “smart grids” and renewable sources, Acea monitors direct and indirect consumption to keep them under control and, where possible, limit them to ensure the lowest possible impact on the environment.
Tables 83 and 84 illustrate direct energy consumption by the Group, including consumption of energy from primary sources (above all natural gas) used to generate electricity/heating and the energy consumed by corporate fleet, both of which decreased in 2009.
Indirect consumption (Table 85) refers to, for example, electricity losses occurring during distribution and transmission (due to losses during transformation and transportation, fraud and incorrect readings) and heat losses in the district heating network.
In order to obtain the amount of “primary source” equivalent to indirect energy consumed by Acea according to that established in GRI-G3 Guidelines, the efficiency figure is used as the factor for converting from primary source to electricity, which in 2009 was around 50%:
GRI-G3 indicator EN4 = 6,651.0/0.50 = 13,302.0 TJ (around 317,918 tep)

Table 83 – ACEA FLEET CONSUMPTION (2007- 2009)

fleet 
 2007  2008  2009 
fuel
   
 945,437.7  1,002,520.9  913,102.67 
kg  694,897  736,853  671,130 
TJ  30.5  32.4  29.5 
diesel
   
 845,941  1,025,757.3  954,709.13 
kg  706,360  856,507  797,182 
TJ  29.6  35.8  33.37 

Table 84 – DIRECT ENERGY (99% NATURAL GAS) USED BY ACEA GROUP (2007- 2009)

energy directly consumed by Group
200720082009
 TJ
(GWh)
TJ
(GWh)
TJ
(GWh)
energy used to generate electricity (a)
8,947,4
(2,485.4)
25,638.8
(7,121.9)
23,513.4
(6,531.5)
energy used for fleet (b)
60.1
(16.7)
68.4
(19.0)
63.0
(17.5)
overall gross electricity produced (c)
4,692.2
(1,303.4)
12,334.0
(3,426.1)
11,124.0
(3,090.0)
net thermal energy sold (d)
59.8
(16.6)
80.3
(22.3)
110.5
(30.7)
EN3 = (a+b)-(c+d)
4,255.5
(1,182.07)
13,293.0
(3,692.5)
12,341.6
(3,428.3)

NB:figures for the three-year period in question have been reclassified according to Acea shareholdings (100% A.R.I.A. Group, 100% Acea Reti e Servizi Eneregetici, 15% Tirreno Power, 30% AceaElectrabel Produzione). Tirreno Power was not included in the Group scope of consolidation in 2007.

Table 85 – INDIRECT ELECTRICITY USED BY ACEA GROUP (2007-2009) - ENERGIA ELETTRICA INDIRETTA UTILIZZATA DAL GRUPPO ACEA (2007- 2009)

overall indirect energy consumption
200720082009
TJ
(GWh)
4,453.3
(1237.1)
6,695.7
(1,859.9)
6,651.0
(1,847.5)
loss of electricity
on distribution and transport networks
2,678.4
(744.0)
2,782.1
(772.8)
2,688.1
(746.7)
loss and in-house consumption
during electricity production
110.1
(30.59)
548.3
(152.3)
530.6
(147.4)
loss of heat
on district heating network
8.6
(2.4)
14.4
(4.0)
17.3
(4.8)
public lighting
consumption
550.1
(152.8)
515,5
(143.2)
543.1
(150.8)
consumption to distribute
drinking and non-drinking water
594,7
(165.2)
1.820,5(*)
(505.7)
1.749.2(*)
(485.9)
consumption
to treat wastewater
452.9
(125.8)
952.9(*)
(264.7)
1,060.2(*)
(294.5)
consumption for other services
58.3
(16.26)
62.0
(17.2)
62.5
(17.4)

NB:figures for the three-year period in question have been reclassified according to Acea shareholdings (100% A.R.I.A. Group, 100% Acea Reti e Servizi Eneregetici, 15% Tirreno Power, 30% AceaElectrabel Produzione). Tirreno Power was not included in the Group scope of consolidation in 2007.
(*)Consumption for distributing and treating water includes all water companies in the report scope as of 2008.