Simulating energy use in multi-family dwellings with measured, non constant heat gains from household electricity

It is crucial to perform energy simulations during the building process in order to design a building that meets demands regarding low energy use. In a low energy building, internal heat gains such as excess heat from household electricity, are a large part of the heat balance of the building. The internal heat gains are depending on the occupants and not constant. Result from energy simulations with household electricity that varied during the day and the year according to a model based on measured data are presented. To make accurate energy calculations of low energy buildings, the daily and annual variations in use of household electricity should be taken into account.