Energy consumption

Energy consumption is an environmental aspect that is assessed and measured at all Ansaldo STS offices and production sites when the environmental aspects of work sites and the construction of civil and technological works are analysed.

Total Energy Consumption (GJ)

To meet its production and operating requirements in 2015, the group consumed a total of 121,841.5 GJ of energy (-8.6% compared to 2014).

This consumption can be broken down as follows: electricity from the grid: 69.9%; natural gas: 22.0%; fuel oil to produce energy and for fuel vehicle traction: 5.9%; petrol and other fuels: 2.2%.

Total energy consumption cuts were due to the 4.9% reduction in the consumption of electricity and the 67.8% decrease in fuel oil (particularly for vehicle traction). On the other hand, the consumption of natural gas was up by 29.4% due to the increase in consumption at non-production sites, and the consumption of petrol more than tripled as the US site in Pittsburgh used cars rather than aeroplanes for short-haul journeys.

In absolute terms, 72.9% of total energy consumption is due to the 13 office sites and 27.1% to the three production sites.

At these three production sites, energy consumption was down 1.7% on 2014, due to the drop in consumption in natural gas (-4.0%) and electrical energy (-1.5%), while the consumption of petrol and other fuels rose (+2.7%).

The office sites showed a decrease in energy consumption (-11.0%) due to the reduction in consumption of electrical energy (-6.6%) and fuel oil (-67.9%), while the consumption of natural gas (+37.1%) and consumption of petrol and other fuels  rose five-fold due to the aforementioned policy at the Pittsburgh site to reduce the use of short-haul flights.


Total energy consumption by hour worked (GJ/hours)

In 2015, the Energy indicator showed a substantial reduction at production sites (-17.3%) due to the combined effect of the increase in hours worked (+18.9%) and the decrease in consumption (-1.7%).
The indicator showed as stable for the office sites:both consumption (-11.0%) and hours worked (-8.7%) were down.

Electrical energy (GJ) 28,488.2 29,261.2 28,834.3 63,814.4 60,291.8 56,307.0
Natural gas (GJ) 4,434.6 3,867.3 3,711.2 25,015.4 16,874.1 23,138.2
Petrol and other fuels (GJ) 368.9 379.5 38,7 465.4 430.6 2,263.7
Fuel oil (GJ) 42.6 42.9 42.9 14,796.7 22,291.4 7,154.5
TOTAL (GJ) 33,334.2 33,550.9 32,978.11 104,091.9 99,887.9 88,863.4

Energy efficiency

Ansaldo STS is currently implementing a project to reduce its energy use at its Italian sites in Genoa, Piossasco (Turin), Naples and Tito Scalo (Potenza) by 20% by 2015. The project was launched in 2010 with an analysis of energy consumption (electrical energy and gas for heating) over recent years and a future projection that showed an increase.

As a result, the need arose to contain and reduce consumption and, consequently, reduce GHG emissions (CO2 in particular).

The types of steps to be taken as part of this project provide, for the Piossasco site, the replacement of much of the energy infrastructure which is obsolete (pipes, valves, lighting, etc.), while for the Genoa, Tito and Naples sites, the approach will focus more on rationalising consumption (less lighting in offices, including when personnel are not present, turning off PCs and displays when they are not in use, etc.) on the basis of actual needs, with the replacement of certain plant with energy-saving oriented systems only where they are obsolete.

The consumption of electrical energy decreased from 2013 to 2015 (-3.8%).

Tito Scalo 1,852,732 1,859,586 1,600,479
Piossasco 1,644,649 1,403,437 1,604,048
Genoa 3,205,524 3,078,189 2,814,047
Naples 2,181,167 1,842,270 1,915,463
TOTAL 8,884,072 8,183,482 7,934,037

The consumption of natural gas also fluctuated due to differences in winter temperatures in the past five years.

Within the overall reporting scope, the energy intensity of buildings indicator, calculated on the consumption of electricity and natural gas for heating, showed a reduction at production sites, due to the lower consumption of electrical energy (-1.5%) and natural gas (-4.0%), and an increase at the office sites due the rise in the consumption of natural gas (+37.1%), which offset the reduction in electrical energy consumption (-6.6%).


Both the Genoa and Solna office sites use district heating.

District heating(KWh) 881,791 822,118 671,544
Genoa 673,333 622.222 517,000
Solna 208,458 199,896 154,544

Renewable energies

Energy from renewable sources (all four Italian office sites + the Swedish office site in Solna since 2014) 8,884,072 8,331,906 8,101,030
% renewable sources of total 34.6% 33.5% 34.3%

Ansaldo STS again acquired electrical energy consumption certificates for its Italian sites under the Renewable Energy Certificate System (RECS) in 2015.

These certificates represent 1 MWh, and attest to the use of energy from renewable sources, which include, as defined by EU directive no. 2009/28: wind, solar, aerothermal, geothermal, ocean, hydraulic, wasteto-energy, landfill gas, residual gas from purification processes and biogas.

By acquiring and subsequently cancelling the certificates (the latter entails the withdrawal of the certificate from the market), Ansaldo STS demonstrates its commitment to environmental sustainability through its willingness to pay the positive difference with the price of electricity from conventional sources.

Since 2014, the Solna site has adopted an energy source mix that is totally renewable (wind power, hydro-electric and waste-to-energy).