Trophée GazoSphère: Efficacity wins the jury “special mention”

Efficacity receives a special mention from the jury for the integration of innovative micro-CHP technology into halfway house l’Autre Toit in Besançon, the result of collaboration with CRIGEN (Engie Lab) and Swiss consultant engineers Planair.

At the Trophées GAZosphère awards ceremony, GRDF presented Efficacity and its partners with the “Jury Special Mention” award in recognition of their innovative collaborative work in installing micro-CHP in a halfway house, l’Autre Toît in Besançon. The trophy is awarded every year to an energy efficient building project using innovative systems and based on outstanding collaboration, for which one of the energies used is natural gas.

Innovative technology tested under real conditions

Efficacity joined forces with Engie LAB and Swiss consultant engineers Planair to incorporate innovative micro-CHP (µCHP) technology into halfway house L’Autre Toît in Besançon (a residential building consisting of 25 housing units and communal areas designed primarily for the ageing or those suffering from severe isolation or exclusion). The results of the simulation study based on Efficacity’s research work were presented to the project holders (Grand Besançon Habitat and GRDF), and the equipment was subsequently installed by the firm of Nouveau and came on stream on 7 February   2017.

Heating is provided by CHP powered by a natural gas microturbine designed and manufactured by a Dutch startup (MTT) affiliated to the University of Eindhoven. The digital simulation studies conducted by Efficacity served to optimise the technical integration of the µCHP solution into the existing heating system – consisting of two condensing boilers – using a 500L thermal storage tank and a novel regulation system devised by Efficacity and Planair. The system is programmed to coordinate the boilers and µCHP, optimising the operation of the microturbine to improve output and encourage its use to generate energy.

The electrical output (3 kW) and thermal output (15 kW) of the CHP plant will be used on site on a self-consumption basis, so as to reduce residents’ heating and electricity bills and the building’s greenhouse gas emissions. The power produced by the system also reduces the building’s needs at peak demand periods for the national grid.