Energianvändning i badhus : Simulering och jämförelse av gamla och nya system

Sammanfattning: Every year new premises are built in Sweden, and even if they are made as energy efficient as possible, this will not reduce the energy demands, but the rate of the increase of the energy use will be reduced. One type of facility in Sweden that is a major energy user is public baths, and this makes public baths an interesting facility to study more closely. There are around 500 public baths in Sweden and about 75 % of those can be seen as older baths with large need of renovation, and they all require a high level of energy efficiency measures. To show how the energy demand increase or decrease depending on the changes chosen to be made, the simulation application IDA Indoor Climate and Energy was used. Simulations were made and compared for several cases, with two extreme cases as starting points. The cases were older and newer ventilation systems, with and without return air flow, older and newer building envelopes and how the indoor climate and the energy demand is affected by the swimming pool covered or not covered during the night. The biggest difference in heat demand was found to be in the two extreme cases, and the use of recirculated air has the highest impact.