Projects

École Polytechnique in Palaiseau

Heat production for a residence: 4 buildings. 73 student homes. Borehole geothermal energy. Heating + domestic hot water.

4 800m
2
73 homes across 4 buildings

Of decarbonised floor area

Reference energy: Gas

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Background

École Polytechnique is committed to an ambitious carbon neutrality pathway. As part of this, it partnered with the project management consultant EMENDA and Accenta to reduce the CO₂ emissions of a residence on its Palaiseau campus (91), comprising 73 homes for married students and staff, spread across 4 buildings. The heating, originally gas-fired, no longer met the institution’s sustainability objectives. École Polytechnique wanted a decarbonised, renewable heating solution for these homes.

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-60%
energy
-78%
CO₂

Challenges

École Polytechnique’s main challenge was to choose an innovative heat production solution that would:

  • Significantly reduce the site’s CO₂ emissions and final energy consumption as part of its Climate Plan
  • Ensure thermal comfort for the site’s residents
  • Integrate different renewable energies through a thermal and electrical Smart Grid and innovative technologies
  • Demonstrate the effectiveness of an advanced system that could also support research activities carried out on the campus
  • Meet the requirements of a global performance contract with commitments on results

Solutions and objectives

To meet these challenges, Accenta deployed a complete solution combining renewable heat production, smart storage and optimised control:

  • Shallow geothermal energy: installation of 14 vertical boreholes, 185 metres deep, coupled with 2 geothermal heat pumps,
  • Air-source back-up: installation of 3 air-source heat pumps and a dry cooler,
  • Solar energy: installation of 2 rooftop photovoltaic plants covering 286 m²,
  • Electric mobility: installation of electric vehicle charging infrastructure (EVCI) with 12 charging points,
  • Research and innovation: creation of a living lab in the boiler plant’s technical room, made available to researchers to observe and analyse how the solution operates in real conditions

Expected results with performance commitment

  • At least 78% reduction in CO₂ emissions
  • At least 60% reduction in final energy consumption thanks to high-efficiency equipment.

The project is supported by the École Polytechnique Foundation, the Ifker Climate Fund and the Energy4Climate (E4C) centre.

Testimonial

“This project embodies our commitment to bringing this institution of excellence a new technology to test an unprecedented and sustainable energy mix, combining geothermal energy, solar energy and smart control. We are proud to support École Polytechnique on an exemplary path towards carbon neutrality.”

Fabrice Didier,

CEO of Accenta

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