12th International Symposium on District Heating and Cooling

The <strong>12th</strong> <strong>International</strong> <strong>Symposium</strong> on District Heating and Cooling,September 5 th to September 7 th , 2010, Tallinn, Estonia3. SDH for combined room heating and districtheating with buffer and heat pump – plantWasserwerk AndritzAs solar thermal systems can‘t always generate thehigh temperatures as required for the district heatinggrid, other applications were found for temperaturelevels below 75 °C (Fig. 4).Solar heat at low temperature level is stored into a60 m³ buffer tank and later used for room heating of anoffice building (low temperature floor heating). Thebuffer is also fed by district heating and thus decreasesthe required connected load of the office building.Even lower temperature levels in shoulder seasons andin winter can be raised by a heat pump. The installationis planned for the end of 2010. COPs above 4 areexpected, i.e. when heat from the collectors of 26 °C isheated up to 55 °C for room heating.ACKNOWLEDGEMENTThis work is supported by the EU in the project―SDHtake-off‖ (IEE - Intelligent Energy Europe).REFERENCES[1] ongoing EU-funded project ―SDHtake-off‖[2] Bucar, G., Schweyer, K., Fink, Ch., Riva, R.,Neuhäuser, M., Meissner, E., Streicher, W.,Halmdienst, Ch. (2005), FEEt – Bestehende fossileoder teilfossile Fernwärmenetze – Einbindung vondezentraler Energie aus ErneuerbarenEnergieträgern – Chancen und Hemmnisse,Endbericht zu „Energie der Zukunft―Forschungsprojekt No 807718 im Auftrag desBMVIT, publisher: Grazer EnergieagenturGes.m.b.h.Fig. 4: solar thermal plant Wasserwerk Andritz142