Utveckling av arketypbyggnader i Visby : Kategorisering med hjälp av energideklarationer

Sammanfattning: This project aims to contribute to the energy mapping of Visby’s building stock. Using energy performance certificates data, the building stock can be categorized after defining energy related parameters. From every category, an archetype building is developed from the mean value of interesting parameters in each group. The goal is to create distinct categories which as well as possible represents the building stock. This study commences with an inventory of Visby’s building stock to create an overall picture. Thereafter categories of the building stock are examined on the basis of interesting parameters that supposedly have an impact on the building’s energy consumption. The purpose is to examine which parameters that together catches the most representative picture of Visby’s building stock. The energy performance of the buildings is the main factor for comparison. Parameters that are used in the categorization process are: Building type, location of the buildings, building volume, type code, year of construction, heating system and number of floors. From the determined categorizations, archetypes are developed and type buildings can be represented. This study only examines residential buildings. Two times during the study, abnormal values were removed from the used material. The cleaning of abnormal values prevents that a few values which are considered as abnormal gives a wrong picture of the building stocks characteristics. The first analysis of the parameters leads to 6 examined categorizations where two are selected, one for single family housing and one for multi-family housing. Parameters that best defines single family housing are year of construction, heating system and building volume. Parameters that best defines multi-family housing are year of construction and building volume.  The established categorization covers 92% of the building stock and 205 buildings are erased by the purge. The standard deviation on the mean value of energy performance has the average value of 30 kWh/m2 in the categorization for single family housing. For multi-family housing the standard deviation of the mean value is on average 17 kWh/m2 in the categorization. The high value of standard deviation for single family housing is affected by the wide range of energy performances values. These values could be caused by buildings that have had renovations or that other parameters that has not been taken into consideration in this study could have been better in the categorization.