Energy calculation and evaluation of available heating system for a school with requirements in Miljöbyggnad

A school will be built in Upplands Väsby, north of Stockholm, Sweden. The school will be located outside the district heating area. The selected location for the school is also inside a water protection area. The available heating system for the school at the located site has been examined and compared against the set requirements in Miljöbyggnad, a Swedish environmental certification system for buildings. In addition, the available heating systems for the school have been compared in a Life Cycle Cost analysis. To address these questions, energy calculations were done in VIP Energy. For deeper understanding, a literary study was done and study visits to two different schools in Enköping. The results show that the school achieved grade GOLD for indicator 1 when the school use heat pumps as source of heating. When using a pellet boiler, the grade SILVER where achieved for indicator 1. For indicator 2, the school fulfilled the set requirement for grade SILVER regardless of heating system in the building. When eco-labeled electricity was used, the school received grade GOLD for indicator 4 regardless of heating system in the building. If no eco-labeled electricity was used, the grade GOLD was only achieved if a pellets boiler was used as heating source. Geothermal heating was recommended for the school when combining the result from requirements in Miljobyggnad and the results for the Life Cycle Cost analysis. If drilling for thermal heating would be disapproved, air/water heat pumps where recommended as heating system for the school