Utredning av potentiell installation av bergvärme

Sammanfattning: A housing society in the municipality of Umeå have under a period found interest in lowering their heating costs for the property. The property consists of 4 buildings in total with 3 of them being a multi-family residential containing 36 apartments in total and one of the buildings is an office building. The housing society was interested in knowing what a geothermal heating system would cost and how long the payback time would be. With the help of the old drawings the property was drawn in Revit and used to calculate the heat loss from different layers of the climate barrier and heat loss from the ventilation system. The internal heat generation was calculated by using standard values. When the total heat losses were calculated, and the internal heat generation was known the yearly energy needs were calculated by using a duration diagram. Then the yearly energy needs were compared to the actual yearly energy consumption of district heat and the software Nibe Dim was used to simulate three different alternatives. The investment that showed best result showed that the total cost for the investment would be 1 800 000 SEK and the annual saving 75 000 SEK/year. The payback time for the investment would however be as high as 24 years.