For Enel, using energy efficiently means, on the one hand, maximizing the efficiency of the mix of sources (thermal, nuclear and renewable) and, on the other, making the distribution network increasingly 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 “Business model for a low-carbon growth”). In 2017, improvement of process efficiency and the implementation of operational excellence programs continued by optimizing the production load distribution.
Energy consumption mainly includes consumption of fossil fuels for the operation of thermal power plants and uranium for nuclear power plants. A small component of energy consumption comes from the consumption of renewable sources, which for Enel are represented by biomass and geothermal fluid.
Fuel consumption by primary source (,000 TJ)
Consumption of fossil fuels for thermal production in 2017 was in line with that recorded in 2016. The energy intensity of the Group, which provides a measure of its operational efficiency, amounted to 6.8 MJ/kWheq in 2017.
In view of almost stable total fuel consumption compared to 2016, energy intensity was up due to the decrease in Group production.
Consumption of fossil fuels for simple and combined thermal production 2017 (%)
IEnergy intensity (MJ/kWheq)
The table below shows 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.
|COUNTRY||INTERVENTION AREA||INTERVENTION DESCRIPTION|
|Russia||Thermal production||Nevinnomyskaya: several initiatives were implemented in 2017, which have enabled total savings of around 95 thousand GJ; these included the use of energy-efficient equipment with the resulting reduction in fuel consumption, the use of LED lights and various technical interventions on the equipment.
Reftinskaya: the reorganization of the lighting system, involving the replacement of normal light bulbs with LEDs, saved about 18 thousand GJ.
Konakovskaya: about 33 thousand GJ were saved in total from some interventions on unit 6 (rebuilding the boiler insulation system, maintenance of the heating systems, cleaning the heating surfaces, maintenance of the turbine).
|Spain||Thermal production||More than 400 GJ was saved by the replacement of 2 mills in Group I, with a more efficient model at the Teruel plant and by the replacement of some old equipment in the Alcúdia plant.|
|Romania||Electricity grid distribution||A total of around 11 thousand GJ was saved thanks to the increase in maintenance activities, in particular the phase load balancing of the grid and the replacement of power transformers/voltage control.|
|Market||In 2017, Enel Romania offered 148 energy saving bulbs (7.5 W) and 35 extensions with switches to the Ferentari district of Bucharest, as part of a wider initiative to improve access to energy in the area and promote more efficient consumption of electricity.|
|Italy||Electricity grid distribution||Around 222 thousand GJ were saved in total thanks to the installation of new lowloss transformers, the optimization of the MV network layout, the installation of new substations and the 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.|
|Colombia||Electricity grid distribution||About 4 thousand GJ were saved thanks to a project for the installation of LED equipment and the replacement of sodium and metal halide (MH) luminaries.|