ENERGY EFFICIENT BUILDINGS - DESIGN AND ENERGY CALCULATIONS IN VARIANTS

The paper deals with calculating assessment of thermal behaviour of energy efficient buildings and its approaching to real building operation. It summarizes aspects influencing energy balance and points out the uncertainty of some input data which affects a calculation result error and decreases its information capability. One of the possible solution methods to treat with this uncertainty is to work with variants, or a spread of input data that allows to gain a notion of possible result spread in dependence on entered inputs and its sensitivity to selected parameters. The very design that should consider and assess different variants by various criteria is not less important. In the extended paper on the DVD there is an example of variant solution and assessment of sports complex study from the point of view of energy need for heating and summer overheating risk in the initial stage of the project, when with respect to the documentation stage there was not enough information available and therefore lack of the input data. Furthermore, it allowed the results to influence decisions in subsequent stages of design.