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Saving energy through energy efficiency, the key to high performance

According to the central scenario of the American Energy Agency1, worldwide energy consumption will rise 28% between 2015 and 2040. It has become urgent to reduce and improve our energy consumption. Energy efficiency aims to minimize energy consumption for an equivalent, if not superior, performance. The challenges with which we are confronted are producing more and better, using fewer resources or using the most suitable resource, or better yet, achieving consumption that is greener, more sustainable, more efficient and better spread.

Energy efficiency is both the biggest challenge and the biggest driver of the energy transition.

ENGIE is committed to the set of targets sponsored by the French government under the National Low Carbon Strategy, believing that final energy demand could be halved by 2050 to 957 TWh, largely thanks to the potential for gain representing by building (40%) and transport (60%). Building alone accounts for around one half of energy consumed in France and about one quarter of its greenhouse gas emissions.

Achieving these aims will call for the best of each of these solutions:

  • In the residential sector, with improved performance of heating solutions and the renovation of homes,
  • In the mobility sector, with battery electric vehicles for light vehicles and with biomethane in the short term, to be progressively replaced by hydrogen, for heavy vehicles,
  • In industry and agriculture, with reductions in consumption of 40% and 50% respectively.

Speeding up energy efficiency for buildings

Energy savings are a key lever in the fight against global warming, particularly in the building sector, which alone accounts for around one half of energy consumed in France. Residential and tertiary buildings constitute significant sources of greenhouse gas emissions. Energy efficiency is therefore crucial for both environmental and social reasons: it will reduce energy consumption and the winter peak.

Existing tools:

  • Energy Performance Contracts for offices and apartment blocks,
  • Energy Saving Certificates.

Energy Performance Contracts are vital for the success of the energy transition. They are tools that concern collective buildings of all types, whether public or private (social housing, condominiums, schools, swimming pools, offices, etc.).

The Group has signed several hundred of them since 2009.

In the framework of its energy saving actions, ENGIE commits itself to performance guarantees with respect to its customers’ energy bills and to the comfort of the occupants of the building.

The aim is to raise the profile of Energy Performance Contracts, simplifying and standardizing them and to multiply the new energy saving actions that can benefit from Energy Saving Certificates.

Saving energy through energy efficiency

Accurate management of our production and our consumptions thanks to digital

Management systems also play a crucial part in overall energy efficiency.

Smart solutions, such as centralized technical management and computer-aided maintenance management, combine sensors and IT tools, making it possible to monitor the consumption of electricity, water and gas in real time and to take action quickly and easily to optimize them. BIM (Building Information Modeling) is used to create a digital 3D representation of the building. This helps optimize the design to limit energy needs, ensure the comfort of the occupants and anticipate future actions to renovate it. It is a tool that complements the Internet of things (IoT), making it possible to install sensors all around the building to ensure centralized management.

Back in 2012, ENGIE developed Vertuoz, a web solution for analyzing the energy consumption of a building, to optimize energy performance. The platform now handles all the data that can make buildings more economical, easy to manage and comfortable.

Renovating old buildings

Effective measures have to be taken to renovate 500,000 homes per year, particularly those with the worst insulation. This means acting on the structure and/or the production and distribution of heating and managing the associated systems. With regard to the building, it entails installing efficient doors and windows (with double if not triple glazing) or improving insulation, for example by opting for external thermal insulation, taking care to maintain indoor air quality with efficient controlled mechanical ventilation systems.

(1) IEO, International Energy Outlook 2017

“You can find a series of articles, interviews and key figures on ENGIE’s view of the energy mix on our dedicated page.”

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