DISTRICT HEATING NETWORK IN WELS, AUSTRIA

Bringing a whole new dimension to solar thermal energy

  • Year of construction: 2010 / 2011
  • Location: Wels, Austria
  • A Solar Thermal System supports the remote heating network
  • Collector area: 3,400 m²
  • Came into operation: May 2011

On 12 May 2011 the largest evacuated tube collector to date, with an area of 3,400 m² and an output of around 2 MW, came into operation on the roof of the exhibition hall in Wels, Austria. The collector feeds energy directly into a remote heating network. Due to this solar thermal system, in summer the energy providers can, at times, reduce their use of gas by 50%.

In its new application in Wels, the CPC High Performance Evacuated Tube technology has once again proved itself to be the most efficient use of solar energy. The same water is used in both the solar thermal system and the heating network, which is the sole reservoir for the solar energy. The expanded water from the solar thermal installation runs directly into the heating network.

The solar thermal system never supplies water colder than 85 °C to the heating network. An annual energy gain of around 1,300 MWh is expected from the installation. Of this, approximately only 6.5 MWh (0.5%) is used for the electrical energy required by the pumps and the valves.  

Excellent performance

Link to monitoring short report