Avvikelser i energiprestanda

Sammanfattning: Calculated and measured energy in residential buildings is going to differ. The reason to this may be due to many factors. In this study there is a study on how these factors affect the energy use in a building. To get an insight in what defines energy, there is first a description of energy supply both worldwide and used in Sweden, followed by a description of the energy balance. In this study energy will be studied in residential buildings only. Laws are applied to the energy use in buildings and how they should be handled. There are laws regarding a maximum use of energy in buildings in different climate zones. In this study some of the factors that affect the energy use are listed and described. It takes into account both structural engineering, installation, technical and user behavioral factors. Out of these one interesting factor, which usually isn’t calculated for, will be chosen and further looked in to.The project will be carried out with different calculations on heat losses from heat water circulations in a residential building with nine floors all together, including a cellar, and 23 apartments. It will be calculated for how much energy is used with these heath losses. The first calculation is done on a standard thermal insulation with the standard gauge appropriate for each pipe size. To execute the calculation AMA 98 will be applied. In the followed study there will be a calculation on how much energy is saved if the thermal insulation is thicker. Another study will be calculated for if there is a different type of insulation used, and in this case vacuum insulation, which has a much better thermal insulation than the standard one. Due to the fact that the thermal insulation is better, there will be a study in what happens with the energy use when a different insulation thickness is used. A comparison is made with the heath losses from the hot water in the same circuit