In Mürzzuschlag is Austria’s second largest solar thermal system
Mürzzuschlag is a town of 8,500 inhabitants in a mountain region between Vienna and Graz. It’s district heating system used to be fired by natural gas and biomass boilers. As both are scarce ressources, the integration of solar thermal was very much appreciated.


Technical Specifi­cations & Special Features

  • Collector area
    5,043 m²
  • Buffer storage
    3 x 60 m³
  • CO2-savings
    930 t/a

Solar district heating for a middle town

The customer Stadtwerke Mürzzuschlag wanted to keep its high share of renewable energies in the district heating grid at low emissions. And the utility didn’t want to invest on its own, so they preferred an ESCo deal.

After a suitable area close to the heating grid was found, SOLID developed a solution with a large collector field and 3 heat storages of 180 m³ in total. The ESCo company SolarWärme MZ GmbH was founded. This company owns the solar plant and sells the produced solar heat to the utility.

The customer has advantages due to a higher renewable share than before and due to peak load management by the storage. The possibility of extension was already integrated by installation of larger pumps and pipes.

 click to enlarge
 click to enlarge

„Being a utility, sustainable and secure heat supply is very important for us. In SOLID we found an enthusiastic partner with the right know-how with whom we could implement our project according to our desires.“

Reinhard Welser & Hubert Neureuter
CEOs of utility
Stadtwerke Mürzzuschlag

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