Typehus svarende til BR-2005-energikrav: Del 1: Optimering af konstruktioner/systemer : Del 1: Optimering af konstruktioner/systemer

This report concludes the first phase of the project 'Optimisation of the building envelope as well as heating and ventilation system in a one family house with respect to energy consumption, indoor climate and economy'. The report heads of with a short description of the background and purpose of the project.

In order to perform an optimisation of an insulation thickness in a building envelope component, it is necessary to first calculate the heat transfer coefficients for the component. In the report these calculations are described in detail for all components. Calculations were performed for building envelope components as they were before and after the optimisation.

The building envelope components are described, and together with the detailed drawings given in the appendix, this presents a good overview of the constructions in their optimised state. The calculations are performed using PC-programs HEAT2 and HEAT3 for 2- and 3-dimensional heat flow, i.e. line and point heat loss coefficients, and the rules given in DS418 for 1-dimensional heat flow, i.e.

U-values. The results of the calculations are summarised and the expected dimensioning heat loss is calculated. Results for the house as it was before the optimisation are also given for comparison. The optimal insulation thicknesses are calculated for each building envelope component (external wall, slab floor and roof), and with this background the chosen insulation thicknesses are discussed.

In order to be able to evaluate whether or not the optimised house will fulfil the purpose of the project, i.e. reducing the energy consumption by 33 % and 50 % compared to the present frame for energy consumption, a series of simulations are performed. The simulations are performed using the PC-program tsbi3.