Passive school in Neckargemünd, Germany
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Abstract | This new passive educational building in Neckargemünd (Germany) has a surface of 14 100 m2 and is occupied since scholar year 2008-2009 by 1300 pupils. The investment is 24 M€ with an overcost of 7% compared to a classical new building and with about 70% energy savings. The overcost payback period is etimated to be 14 years. The architectural design, the thermal insulation and efficient windows lead to a U-value (overall heat transfer coefficient though building envelope) of 0.15 W/m2.K. The air tightness of the building envelope is lower than 0,6 vol/hr under 50 Pa (n50=0.6). Heating needs remain below 15 kWh/m2/year. Heating is provided by a 80 kW ground to water heat pump (14 vertical ground loops of 140 m depth) together with a 200 kW pellets boiler. Rooms are equipped with hot water radiators. The ventilation is based on a balanced systsem with heat recovery. Systems are controlled through temperature and CO2 sensors.
In addition, photovoltaic cells have been installed on the roofs (29.75 kWp).
Web URL(s) of the case | http://www.neckargemuend.de/servlet/PB/menu/1283987_l1/index.html, http://www.buildup.eu/publications/4104
Lessons learnt | One of the first bi passive public buildings.
Award labels | none
Case Languages | German
Submitted by François Durier (CETIAT )
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