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Energy

  • GRI
    

For Enel, using energy efficiently means, on the one hand, maximizing the efficiency of the mix of sources (thermal, nuclear and renewables) and, on the other, making the distribution network increasingly more efficient. Therefore, the strategy to reduce Enel’s energy consumption envisages investments to increase efficiency in all the Group’s activities, from production to distribution, and also aims at spreading greater awareness of conduct (see also the chapter “Growth across low-carbon technologies and services”).

In 2018, improvement of process efficiency and implementation of operational excellence programs continued in the various Business Lines.

Energy consumption mainly includes fossil fuels for the operation of thermal power plants and uranium for nuclear power plants. A limited share of energy consumption is related to operation of the plants generating electricity from renewable sources.

Total direct consumption of fuel was 1,547,064 TJ (equal to 37.0 Mtoe). An 11% decrease in fuel energy consumption was recorded against 2017 due to lower thermal and nuclear generation. Geothermal production in Italy and Chile remained substantially stable. The Group’s energy intensity, which provides a measure of its operational efficiency, amounted to 6.0 MJ/kWheq in 2018, decreasing by 11%. This reduction compared to 2017 reflects a production mix in the year which, with stable Group production, marks an increase in generation from renewable sources.

Fuel consumption primary source (.000 Tj) 

consumo di combustibile

2018 total consumption of fossil fuels for simple and combined thermal generation 26.9 Mtoe (%)


Energy Intensity (MJ/kWheq)

 

The table below shows some of the main initiatives carried out both on plants and on the territory, with an indication of the country and the area of intervention in terms of energy efficiency.

CountryIntervention areaIntervention description
RussiaThermal production

Nevinnomyskaya: several initiatives were carried out in 2018, enabling total savings of around 56,000 GJ; these included the use of energy-efficient equipment with the resulting reductionin fuel consumption, actions to improve efficiency such as the inclusion of fans to lower the air temperature, technical renovation and modernization of fuel pumps (unit 7) and of the fuel supply system boiler (unit 5A).


Reftinskaya:
 the reorganization of the lighting system, involving the replacement of normal light bulbs with LEDs, saved about 87,000 GJ.


Konakovskaya: in total around 60,000 GJ have been saved by work on unit 8 (replacement of the boiler and turbine insulation system, cleaning of heating surfaces).

SpainThermal productionMore than 171 GJ saved by replacing conventional fixtures with LED fixtures in the Almeria powerplant.
ItalyElectricity grid distributionAround 152,000 GJ were saved in total thanks to the installation of new low-loss transformers, optimization of the MV network layout, installation of new substations and reconstruction/ upgrading of LV/MV lines. The addition to the distribution network of new substations (both HV/ MV and MV/LV) allows a rationalization and optimization of the network at lower voltage, resulting in a reduction of the average length and average load of the network with a resulting reduction of power losses. The renovations of the MV and LV lines are generally carried out by replacing the existing conductors with others of a larger section, with a consequent reduction in energy losses.
RomaniaElectricity grid distributionApproximately 196,000 GJ have been saved by increasing maintenance operations, and byimproving the smart meter system.