Onex Renove: Typological and energy analysis of multifamily buildings in an urban suburb of Geneva

Pierre Hollmuller Head of Systèmes Energétiques Group

Abstract
Built in the 60's -70's, the new City Onex is about 600'000 m2 of residential buildings with an annual heat consumption of 80 GWh. Aware of the urgent need to increase the energy efficiency in these buildings, the City of Onex and the State of Geneva have recently decided to launch a pilot project, entitled « Onex Renove », that aims to facilitate the participation of building owners and managers in a large-scale energy renovation program. A five-step approach was developed in collaboration with private and public partners, providing building owners involved in this process project support as well as facilitated administrative procedure for renovation.
In this context, the main purpose of this study is to provide methodological support for this project, including a building typology study and an overview of the energy consumption of the Onex building stock. The results can be used to better analyze optimized building retrofit strategies per family. The study concludes with a discussion regarding the impact of massive energy renovation of the Onex buildings on the mix heat delivered after the connection of the two main district heating networks CADIOM and CADSIG in Geneva.

Authors: Khoury, Jad; Lachal, Bernard Marie; Hollmuller, Pierre.

Note: This result was developed outside of the Renowave project.