Energy efficiency measures for a culturally valuable building : An energy investigation and related suggestions for a q1,2-marked building

Sammanfattning: Valhalla is an old school building constructed in the beginning of the 20th century. Originally designed to be used as a school for girls, the building is now being used for cultural purposes and decaying. The municipality of Falun, who owns the building, wishes to restore it to the point where it meets todays modern standards and amenities, regarding indoor climate and comfort. The idea is to convert Valhalla into an office building for the employees of the municipality. Whilst doing this, a refurbishment goal set by the municipality of Falun applies where the annual amount of bought energy for the building shall be reduced by half when the refurbishment is complete. This report will evaluate the optimal solutions for Valhalla to meet the municipality’s goal. Due to the cultural protection of the building a package of appropriate suggestions will also be displayed. These suggestions are applied with the preservation of Valhalla in focus. A replica of Valhalla will be constructed in IDA ICE which is a simulation software where different energy measures can be investigated and evaluated. This is done to decide which kind of measures is profitable. By only focusing on improving the insulation to Valhalla a total energy reduction of 37.5% is achieved, which is not enough. This report will find out if the goal of reducing the annual amount of bought energy by half is achievable if geothermal heat pumps are introduced. Modern heating and ventilation systems will be installed to ensure that the indoor climate and comfort of Valhalla meets the regulations. Investigating the impact from insulation of the façade, external walls, roof, and windows and how it will improve the building. As well as applying smart controlling of the appliances and lighting, how the occupants can affect the annual electricity usage. By changing the primary heating source to a geothermal heat pump instead of the district heating already installed at Valhalla, to see the total impact in terms of both bought- and primary energy.