One of the measures in France’s Energy Transition for Sustainable Growth Act is to “improve the energy and environmental performance of new buildings with the overriding goal of promoting energy-plus buildings starting in 2020.” The legislation also recommends reducing the energy consumption of existing buildings by a third.
Is the “recommendation” just another example of greenwashing, or is it a challenge that can be overcome by technology and more environmentally-sustainable user behavior? The Myriade project opted to take the challenge! When it comes to energy, there is a lot of talk about buildings, and for good reason. In France, buildings alone account for 24% of greenhouse gas emissions and 45.1% of total energy consumption.
Myriade is now a modular domestic hot water and heating production system for new commercial and multi-family residential buildings. The system’s real-time capabilities allow it to “choose” the building’s three sources of recoverable waste energy (extracted air, gray water, and solar, which can be used separately or together) before resorting to gas or electricity. Another benefit of Myriade is that it is easy to expand with new modules without interrupting operations and to modify in the event of new environmental regulations.
The Waldhorn residential building in an eco-neighborhood in Strasbourg was recently completed. The building is equipped with geothermal heating system that collects heat from the Rhine River’s water table and the Myriade heat harvesting system for extracted air and gray water. The building obtained energy-plus and low-carbon certifications.
Building stakeholders are seeking increasingly innovative, high-performance solutions to help reach these targets without dramatically increasing construction costs. Project partner France Air has been designing and selling air treatment, HVAC, and domestic hot water systems for nearly 60 years. Very early on, this innovative company turned its attention to solutions operating off of alternative energy sources like solar, gray water (from showers, washing machines, and dishwashers), or extracted air from HVAC systems.
- Collaboration with INES on thermal solar collection technology; INES also completed semi-virtual performance testing on the complete system using all three energy sources (air from extractors, gray water, and thermal solar)
- Contract with engineering firm Tribu Energies to confirm the feasibility of the system with regard to regulatory requirements; as France’s RT 2012 building performance legislation does not address how to calculate the energy performance of France Air’s system, the company had to apply for “Title V” certificate (approved, official announcement pending)
- Management and prediction algorithms that will ensure detailed and optimized regulation of the system
- Contract to equip a property development project with the new system (with property developer Boulle Promotion based in Strasbourg) signed
- Collaboration with engineering firm GLM on the theoretical calculations necessary to dimensioning the system and the 3D BIM-format drawings to facilitate installation.