Austria’s largest Solar District Heating plant is actually enlarged from 5000 m² to 7000 m².
The new collector area serves as a field test for 4 different Large Scale Solar Thermal Collectors from 3 different manufacturers.
The Large scale Solar Thermal plant at the district heating plant in Graz is actually enlarged by SOLID by another 2000 m² collector area. The harvested energy will be used to 100% in the city’s district heating grid and satisfy the hot water demand of approx. 7000 citizens.
The existing 5000 m² array on the roofs of AEVG was installed in 2007 and operates successfully since. The new collectors will be placed in the north of the existing array directly on the premises of the district heating plant.
In addition to the energy harvest, this new installation is used for a “real life” field test of different Large Scale collectors in one single installation. Decisions for new installations in the future will therefore not only be taken by simulations but being backed up by the results of this field test.
In the planning phase, SOLID had invited a larger number of European and Asian collector manufacturers for participation in this comparison and finally could sign contracts with 3 different European brands. The comparison was based on cost of the harvested energy over the lifetime of the plant and was open to Evacuated Tube collectors as well as Large Scale Flat Plate collectors.