Analýza stavebně energetické koncepce sanace vybraných bytových domů

Abstract

The thesis focuses on analyzing the building energy concept of rehabilitation of selected residential buildings which were implemented in the second half of the last century. Seven residential buildings of different design solutions (type and a-type) were selected for the analysis. A description of the existing state of structures, including a description of rehabilitations associated with a reduction in energy intensity (the insulation structures at the building system limit and replacement of opening fillings - windows, doors and glass walls - in peripheral casing) was developed for the selected residential buildings. Thermal technical characteristics of structures at the building system limit were calculated for the chosen residential buildings through the coefficient of heat transfer and structure heat resistance. Further, there was also processed their energy performance according to applicable legislation. The value of the total energy supplied, the specific energy supplied, the value of the average heat transfer coefficient and the value of non-renewable primary energy were determined. The selected residential buildings were rated. Calculations of energy performance were primarily focused mainly on energy consumption for heating. Calculated values of energy consumption for heating were assessed with the actual energy consumption measured at selected residential buildings over the last ten years, for the period 2004 - 2013. In these periods there were significant changes in energy consumption due to structural modifications of existing buildings associated with a reduction in energy intensity. Calculations of energy performance of selected buildings were modelled during changing of marginal conditions. Marginal conditions were changed in four cases. Marginal conditions were modelled to change the assignment of intensity of natural ventilation selected buildings to change the assignment of thermal storage of structures of selected buildings, to change the assignment of influence of thermal bonds in selected buildings and to change the assignment of internal temperatures of selected buildings. Subsequently deviations of the calculated values were statistically evaluated.