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Public sector and municipalities

Luxembourg-Kirchberg, Kirchberg energy plant

Luxembourg-Kirchberg

Since its commissioning in 2001, the energy plant has been supplying the heat network of the City of Luxembourg with heat from combined heat and power units (CHP) and condensing boilers that were operated with natural gas.

Due to the growth of Kirchberg and the resulting general increase in demand for heat, LuxEnergie has carried out the last efficient and ecological expansion of its energy plant in 2016. Since the completion of this expansion phase in 2017, the majority of heat will be produced using biomass, more precisely wood pellets. The wood pellets are burned in the biomass CHP and this heat covers the base load of the Kirchberg. During peak demand periods, the CHP units, which run on natural gas, and the condensing boilers will be put into operation to meet customer demand.

Die grüne Wärme übersteigt damit die fossile Wärme um 12.000 MWh/Jahr. Mehr als 50% der Wärmeversorgung des Kirchbergs werden somit durch erneuerbare Energien gedeckt. Das Wärmenetz des Kirchbergs wird zu einem „grünen“ Netz. Des Weiteren verbessert sich die Energiebilanz der angeschlossenen Gebäude. Das Wärmenetz der Stadt Luxemburg erlaubte somit die Umstellung in einem Zug eines ganzen Stadtteiles auf grüne Energie.

Key figures

Commissioning / conversion:2001 / 2017
Heat production:before conversion:127.500 MWh/a (fossil)
after conversion:76.600 MWh/a (regenerative)
58.900 MWh/a (fossil)
Power production:before conversion:59.900 MWh/a (fossil)
after conversion:21.600 MWh/a (regenerative)
28.700 MWh/a (fossil)
Heat network:17,5 km
Use:District heating / electricity

Energy plant

Before conversion

6 CHP modules
Primary energy: natural gas

3 boilers with dual fuel burners
Primary energy: natural gas and heating oil

After conversion

1 biomass cogeneration module
Primary energy: wood pellets

5 CHP modules
Primary energy: natural gas

3 boilers with dual fuel burners
Primary energy: natural gas and heating oil