Within the framework of Sol’AURA project, in which the RES-DHC project partner AURA-EE is involved, the town of Voreppe integrated solar thermal energy into its second heating network. Voreppe’s objective was to use this technology since 2013 and the town finally did it in 2020, which allows it to avoid 12 tonnes of CO2 equivalent per year.

Voreppe’s heating network now uses solar thermal energy and supplies clean and renewable energy to the municipal swimming pool, two schools, an elderly care centre, buildings and individual houses. It is 800 metres long and is being extended to 1.2 kilometres.

The solar thermal plant with 160m² has an average productivity of 500 kWh/m² per year, with a renewable energy coverage rate of 92.5% and is based on wood and solar supply. This heating network is based on solar thermal energy, which heats the cold water coming back from the various connected buildings. If the energy produced by the solar thermal plant is insufficient, the wood and gas boilers provide the rest.

The installation consists of 11 collector rows placed in the area between the boiler room and the swimming pool, which are inclined at 10° and face south.

Further information about the project (in French) can be found here.

Text: Auvergne-Rhône-Alpes Energy Environment Agency (AURA-EE)

Photo credit: CEA Ines