| Abstract [eng] |
Global warming is having an increasing impact on the environment and on the energy, construction, and other sectors, making the energy consumption of buildings one of the most important factors in reducing negative consequences for the environment and the economy. Since buildings account for a significant proportion of total energy consumption, particularly in the areas of heating and cooling, it is necessary to strive for greater energy efficiency. In response to the climate crisis, the European Union has introduced the European Green Deal, which aims to make the EU a climate-neutral region. Approximatly three-quarters of buildings use energy inefficiently and wastefully. Controlling and optimizing energy demand is therefore one of the most important measures enabling that will enable the European Union to influence the global energy market. The objective of this study is to perform a comparative analysis of the effectiveness of window-wall linear thermal bridges. Tasks: 1. To analyze publications by Lithuanian and foreign researchers, as well as and regulatory requirements related to window-wall thermal bridges. 2. To present the COPRAS multi-criteria evaluation algorithm and describe the tools and methods used in the study. 3. To investigate the longitudinal thermal bridges of three different window installation methods in walls, assess their impact on the energy efficiency of buildings, to determine the most effective window installation location in relation to the wall, and to select the most rational window installation system option using the COPRAS evaluation method. The first part of the master's thesis presents a review of scientific literature, which demonstrates that, in the context of climate change and considering the impact of buildings on energy consumption, it is particularly important to improve the energy efficiency of buildings, thereby reducing their environmental impact. The second part describes the methodology for calculating longitudinal thermal bridges and thermal resistance, and examines and describes the COPRAS multi-criteria evaluation method. The third part of thesis investigates three different window installation methods, evaluates six possible window installation locations, and determines the most effective wall-window installation solution. The evaluation criteria include the value of the longitudinal thermal bridge, thermal energy demand for heating and cooling the building, the CO2 emissions of the building, and the complexity of installing the wall-window junction. The master‘s thesis consists of: a summary in Lithuanian and English, three chapters, conclusions, a list of references and appendices. The project is 74 pages long, with a 3-page appendix. The list of references consists of 50 sources. |
