| Abstract [eng] |
The goal of this master's thesis is to examine how log residential houses and their constructions can meet the requirements of the A++ energy efficiency class. A review of scientific literature was conducted, covering the concept of zero-energy buildings, energy efficiency in buildings, the features of log house constructions, and their technical challenges. Additionally, studies on the airtightness and thermographic analysis of log buildings were reviewed, along with solutions to improve building airtightness and insulation. The research involved performing in-situ airtightness and thermographic tests to identify problematic areas in a log house. Using the THERM software, an analysis of linear thermal bridges in problematic areas was carried out to reduce heat losses. The Ubakus program was used to model three different wall constructions that meet the requirements of the A++ energy efficiency class, showing that external insulation is the most effective solution. The NRG 7 program was utilized to evaluate the energy performance of the building, considering the impact of different heating systems. Wood pellets used with a solid fuel boiler were the only system to achieve the A++ class without additional systems. Ventilation systems with heat recovery and photovoltaic modules significantly improved the efficiency of other heating systems, allowing A++ class performance to be achieved with electric heating, natural gas, and heat pumps. |
