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Table 1 Capacities and temperatures of available heating/cooling sources

From: Smart energy systems for smart city districts: case study Reininghaus District

Source Max. capacity [MWh/year] Temperature at source [°C] Comments
Marienhütte Stahlwerk medium temperature industrial waste heat 18,000 78 Steel plant with upright waste heat input to district heat and additional potential for more input
Marienhütte Stahlwerk low temperature industrial waste heat 100,000 30 Steel plant with upright waste heat input to district heat and additional potential for more input
STAMAG Malzfabrik low temperature industrial waste heat 1,000 22 Malthouse producing waste heat which may be used for input to heat pumps as well as for cooling
Linde Gas low temperature industrial waste heat 33,000 22 Industrial gases firm producing waste heat which may be used for input to heat pumps as well as for cooling
Cold water well on estates of investor Erber 8,700 10 May be used for input to heat pumps as well as for cooling
PV collectors 1,938 var. In competition with solar heat for roof space
Solar heat collectors 815 var. In competition with PV for roof space
District heating system of Graz no limit defined var. District heat provided by the existing heating system of Graz