A green heating network for Kirchberg, over 90% of which is supplied by renewable energy sources

Once commissioned, the plant supplied the Kirchberg heating district network of the City of Luxembourg via natural gas cogeneration installations supported by condensation boilers. The cogeneration installations, which produced not only heat but also electrical power, fed the current generated into the public electricity grid.

Due to the growth of the Kirchberg district and the general increase in heat requirements, LuxEnergie began an initial ecological conversion of the energy plant in 2016. Since then, most of the heat has been produced from biomass, specifically wood pellets. The pellets are burnt in a cogeneration installation and the heat generated covers Kirchberg’s base load. During consumption peaks, the additional activation of the cogeneration facilities and, if necessary, the condensing boilers made it possible to meet demand.

In 2023, the heating plant was converted for the second time. Peak load coverage has now been made more environmentally friendly by swapping the gas-fired cogeneration units for 2 wood dust boilers with a total output of 15 MW.

These two transformations of the energy plant make it possible to save 13.8 million m3 of gas per year, which simultaneously means a reduction of 37,000 tonnes of CO2 per year.
The heating network has become a green network. Over 90% of which is supplied by renewable heat.