Renovation of the primary school Bad Eisenkappel
Bad Eisenkappel, Province of Carinthia, Austria
The "Immobilienverwaltung Schulgemeindeverband Völkermarkt KG" carries out a thermal renovation of the secondary school in Bad Eisenkappel. Due to demographic developments, the number of pupils has fallen sharply in recent years. In order to preserve the regional infrastructure, it was decided to carry out a general renovation. The future utilisation concept provides for the accommodation of the Neue Mittelschule and the Volksschule Bad Eisenkappel. The music school, the local afternoon care and a library will also be integrated.
The building shell will be thermally improved by 18 cm of mineral wool plaster boards (U-value from 0.78 W/(m²K) to 0.16 W/(m²K)). Also the earth-facing ground will be insulated with 13 cm XPS or EPS (U-value from 2.82 W/(m²K) to 0.25 W/(m²K)). The existing windows with an average U-value of 2.56 W/(m²K) will be replaced by new aluminium windows with a U-value of 1.21 W/(m²K). Shading is provided by centrally controlled external Venetian blinds.
Heating will continue to be provided via the local local heating network. Only the configuration must be changed due to the measures (mechanical ventilation and exhaust system for the lounges with 85% heat recovery; reduction of the building heating load) to nine heating groups with demand-oriented control. Hot water is produced decentrally.
Due to the new full thermal insulation and the ventilation system with heat recovery, as well as the zone-related heating regulation, the specific heating demand (HWB*) drops from 31.57 kWh/(m³a) to 5.95 kWh/(m³a).
To increase electrical energy efficiency, the lighting system is optimised by using LEDs and efficient fluorescent lamps. By changing the lighting, 5 MWh of energy can be saved annually. However, due to the installation of the controlled aeration and ventilation system, the energy requirement hardly changes.
Benefits
Due to demographic developments, the number of pupils has fallen sharply in recent years. In order to preserve the regional infrastructure, it was decided to carry out a general renovation.
Since the number of pupils has currently fallen below 90, the use of synergies was a prerequisite for retaining the location as a school location.
The current utilisation concept provides for the accommodation of the secondary school and the primary school Bad Eisenkappel.
The music school, the local afternoon care and a school library were also integrated.
Energy cost reduction and accessibility were also requirements for the planning. It was the client's wish not to have to make any major changes after the sample renovation for the next 30-40 years.
Mechanical ventilation was a major topic in the target definition, whether centralised or decentralised. The negative experience of a ventilation system in a school that had just been implemented at that time had a strong influence on this discussion.