Summary
The factory building, built in 1959, was first used for the production of television sets, then as a large printing plant and finally as a car park for a forwarding agency. Since 2000 the hall was empty and could have been demolished if AS Solar had not started the renovation in 2010.
The following contents were considered during the concept development:
- Review of the static construction,
- spatial usage concept,
- integrated and sustainable energy concept,
- energy balance energy-plus building,
- optimised architectural design and
- building physics investigations (catalogue of components).
Passive house standards were implemented for the office area on the upper floor. The production area on the ground floor meets the German Energy Saving Ordinance requirements of 2009 and the storage area, also on the ground floor, is not heated.
150 m² of the east, south and west facades were equipped with solar thermal vacuum tube collectors. A sprinkler pressure tank from the existing building from 1971 was converted into a buffer storage with a volume of 30 m³. The remaining heat requirement is covered by pellet boilers.
Two 19 kW absorption refrigerators, which are operated with solar heat in summer, and a conventional compression refrigerator are available for the required cooling.
A 268 kWp photovoltaic system was installed on the roof. This means that the solar coverage for electricity fluctuates from less than 20% in winter to 200% in summer. Between 16 % and 19 % of the total electricity consumption is required for the operation of the air conditioning systems. For lighting, 10-12% of the total electricity consumption is required in summer and 13-14% in winter.
The guidelines created can be found in the appendix of the final report.
