District Heating Graz Liebenau
On the roof of the skating hall of the Stadium in Graz Liebenau, a solar thermal system with 1407 m² collector surface was built on
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At our reference project in Klagenfurt, Austria, we use 8 MW from the exhaust gas condensation of a biomass CHP boiler, total power of 52 MW, at 45°C. On high temperature side, the absorption heat pump is supplied by 12 MW at 130°C. This leads to district heating feed-in temperature of 75°C at 23 MW.
As return is below 60°C in winter, a temperature spread of over 15K is reached. In winter district heating has a flow temperature of up to 120°C. So the absorption heat pump heats up from 60°C to 75°C and the biomass boiler from 75°C to 120°C.
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On the roof of the skating hall of the Stadium in Graz Liebenau, a solar thermal system with 1407 m² collector surface was built on
The installed heat storage, with a capacity of 165 m³, results in an overall efficiency increase via energy management.
Energetika Vransko, the local utility, wanted to increase their green energy supply to the district heating system. The signs were good – especially lucrative funding
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