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A manual on energy transition for buildings and citie

The convictions and solutions of design engineers

manual only available in french
Manual only available in french

Egis’s design engineers have written this manual to explain energy-related issues in a simple and informative way, to educate our partners and clients on the simple, accessible and user-friendly solutions available. The hope is that this manual can also help develop solutions for energy rehabilitation and the fight against fuel poverty.

A manual about energy, a user guide giving everyone an insight into the science and technology

At a time of national debate on energy transition, Egis was keen to make sure that energy doesn’t remain the sole preserve of experts: first and foremost, there needs to be rapid change in our culture and overall understanding of the challenges and possible solutions. By publishing this manual, Egis also wanted to create a “workroom” for simple and sound solutions that are easy to implement.

This manual is organised around two main chapters focusing on:

  • energy “a user guide”: this chapter provides the keys to understanding what energy is as a whole, by giving simple definitions and examples to illustrate: what is primary energy, embodied energy, what units are used, what is meant by the overall energy cost, energy efficiency, etc. And finally, the manual takes a look at the various alternative solutions to oil while explaining the advantages of light, biomass, geothermal power, and more.
  • the second chapter focuses on taking action, particularly on the benefits of offering overall optimisation of solutions (instead of cumulating individual optimums), innovating and adopting strong and consistent strategies across all challenges (life cycle approach), ensuring long-term energy performance, and finally, facilitating discussion of complex issues by providing a single contact point for customers and project partners.

In the manual’s conclusion, Egis presents some of its iconic projects and offers a bibliography for all readers who want to know more about Egis’s expertise in the field of energy.

  • The French Ministry of Defence, Balard site: three-quarters of annual heating and cooling needs, as well as ventilation, are provided by high-performance systems, particularly through interaction with the surrounding environment (air, geothermal power) and the energy recovery of buildings
  • Allianz Riviera Stadium in Nice (France) : a positive energy building. The stadium’s envelope is made up of a three-dimensional mixed wood and metal structure covered with PVC and ETFE canvas and a photovoltaic system. Geothermal energy to produce hot and cold air, and implementation of a photovoltaic power system with a surface area of 8500 sqm, making this an eco-positive stadium.
  • Villages Nature (Seine et Marne/ France):  over 97% of the site’s heat supplied by a renewable geothermal source
  • The NEF (building in Tours/ France), a social rehabilitation project with high architectural and energy performance. An innovative system for producing head and cold based on geothermal power. The project management and EPCM adopted the principle of using geothermal energy and producing the least amount of cold possible. Current drilling for geothermal energy is at 60m deep. It allows for a flow rate of 22 m3/h with a water temperature of 16°C. It is then stored in a tank of 140 m3 then feeds three water-to-water heat pumps. These pumps operate either together or independently to produce water at 45°C for heating and 65°C for hot water. The system is used to heat homes, while cold is stored in the 140 m3 tank. This is used to cool offices, via radiant ceiling equipment. This principle provides satisfactory comfort without air conditioning (the offices face east). It therefore capitalises on the multi-functional nature of the building by using the heat on one side and cold on the other.