Energy consumption

Energy consumption is an environmental aspect that is assessed and measured at all Ansaldo STS sites and when the environmental aspects of sites and the construction of civil and technological works are analysed. To meet its production and operating requirements, in 2013, Ansaldo STS consumed a total of 137,427.28 GJ of energy (+3% compared to 2012). This consumption may be broken down as follows: electricity from the grid: 67%, natural gas: 21%, fuel oil to produce energy and for fuel vehicle traction: 11%, petrol and other fuels: 0.61%.

  2013 2012 2011 2013 2012 2011 
Electricity (kWh)  7,913,398.0  7,640,153.0  7,912,208.0  17,726,216.7  17,995,517.5  17,252,010.4 
Electricity (GJ)  28,488.2  27,504.6  28,483.9  63,814.4  64,783.9  62,107.2 
Natural gas (Nm3)  126,594.8  136,625.4  162,053.8  714,114.9  609,573.6  571,545.6 
Natural gas (GJ)  4,434.6  4,786.0  5,676.7  25,015.4  21,353.4  20,021.2 
Petrol and other fuels (t)  8.4  8.9  6.9  10.6  64.0  79.8 
Petrol and other fuels (GJ)  368.9  386.8  302.9  465.4  2,797.9  3,486.3 
Fuel oil (t)  1.0  1.0  1.4  347.2  102.8  286.4 
Fuel oil (GJ)  42.6  43.5  60.5  14797.6  4,380.6  12,205.8 
TOTAL (GJ) 33,335.0 32,720.8 34,524.0 104,092.8 93,315.8 97,820.6

Total energy consumption (GJ)

Total energy consumption (GJ)

In absolute terms, 79% of total energy consumption is due to the 14 office sites and 21% to the three production sites. At the latter sites, energy consumption has increased by 1.9% on 2012 due to greater electricity consumption (+3.6%) and despite the reduction in the consumption of natural gas (-7.3%), diesel (-3.6%) and petrol and other fuels (-4.7%). The office sites have seen a greater increase in energy consumption (+12%), despite the reduction in the consumption of electricity (1.5%), due to the increase in the consumption of natural gas, diesel, petrol and other fuels.


KPI - total energy consumption per hour worked (GJ/no. of hours)

KPI - total energy consumption per hour worked (GJ/no. of hours)

KPI - Electrical energy consumption per hour worked (kWh/no. of hours)

KPI - Electrical energy consumption per hour worked (kWh/no. of hours)

The trend in the performance indicator total energy consumption per hour worked shows an increase at both the production sites (+32%) and the office sites (+8%). At the production sites this is due to the slight increase in energy consumption (+4%), combined with a substantial decrease in hours worked (-23%), while at the office sites there was a slight increase in energy consumption (+4%) and a decrease in hours worked (-4%).

Electricity consumption per hour worked is nearly constant at office sites (+3%), where the slight decrease in hours worked is offset by the slight decrease in the consumption of electricity (-1.5%). However, it is up at the production sites (+34%), since the consumption of electricity rose slightly (+3.6%) but, as noted above, the number of hours worked decreased considerably.

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) in 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 Turin 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 is not present, turning off PCs and displays when they are not being used, etc.) on the basis of actual needs, with the replacement of certain plant with energy-saving oriented systems only where the former are obsolete.

Estimated costs range from €200 thousand to €300 thousand per year for five consecutive years, considering investments making up roughly 70% to build plant that is equivalent to that which will need to be replaced, while the remaining 30% relates to the actual cost of the energy saving project. This expenditure is expected to generate economic and environmental benefits, the former including the possibility of obtaining financing for the renewal of plant under EU directives to reduce GHG. In addition, these investments will generate average energy savings prudently estimated to be 4% per year, making it possible to achieve the 20% target in five years.

As part of this ambitious project, significant projects have been carried out at the Piossasco site to improve energy consumption.


Analysing the impact of thermal/system improvements in 2013 in terms of energy requirements and effectiveness in reducing consumption, we see that they relate to the insulation of the building, the installation of transparent film and the airdraulic distribution rehaul.

Roof insulation – The office building roof was re-insulated. This project will generate energy savings of 6.8% in 2014, entailing a decrease of roughly 21,300 m3 of natural gas per year (based on 2013 volumes).

Window insulation – The transparent surfaces in the office building at the Piossasco site were covered with transparent film to generate electricity savings in the refrigeration unit of 4.8%, entailing a decrease in consumption of roughly 8,100 kWh per year.

Aidraulic distribution rehaul on the first flour (offices) – Significantly decreasing dispersion, the project to replace the air conditioning ducts, along with the installation of adjustment shutters for better airdraulic distribution and a consequent improvement in ambient comfort, will reduce energy consumption by 6.8%.

Renewable energies

Ansaldo STS has acquired electrical energy consumption certificates for its Italian sites under the Renewable Energy Certificate System (RECS) for 2013. RECS 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, waste-to-energy, landfill gas, residual gas from purification processes and biogas. The quantity acquired for 2013 amounts to 6,787 MWh.

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.

The Solna and Les Ulis sites acquire energy on the grid from renewable or nuclear sources.

Italian sites – Electricity from renewable sources (kWh) 5,809,662  6,195,980  6,787,000 
Electricity acquired on the grid from renewable and/or nuclear sources (kWh) 3,497,332  3,044,437  2,984,782 
Total electrical energy consumed (kWh) 25,164,218  25,637,682  25,639,615 
% of electrical energy from renewable resources out of the total 37%  36%  38%