| Abstract [eng] |
The construction sector is crucial for satisfy the requirements of the European Union's energy and environmental rules. Energy - efficient buildings increase people's standarts of living and bring added value to the economy and society [3]. One of the simplest and most effective ways to save energy is to insulate buildings. The main task when heating a building is to choose such an insulation material that would increase the thermal resistance of the building envelopes [6]. Faults occur for a variety of reasons [35], one of which is the improper installation of the floor, rain and contaminants on the plinth finish. In this way, moisture with contaminants penetrates through random locations and into the thermal insulation of the plinth and basement walls and increases the likelihood of irreparable damage [35]. In the first part of the master's final project, Lithuanian and foreign scientific articles are examined and analyzed. The second part describes the multi-criteria evaluation methods, examines the algorithms of the TOPSIS and COPRAS methods, and provides the formulas and calculations required to verify the consistency of the expert survey responses. In the third part, the research model was chosen for the multi-criteria evaluation using TOPSIS and COPRAS methods and for the calculation of the final results - the plinth unit and 3 different plinth insulation materials were evaluated: polystyrene foam boards ETNA EPS 100, extruded polystyrene foam Finnfoam XPS FL-300, silosor Based on the analysis of scientific articles, the selected indicators were used to evaluate the efficiency: the cost of the insulation material, the heat transfer coefficient, the compressive strength, long-term water absorption. The aim of the work is to perform a multi-criteria evaluation of the efficiency improvement of the materials of the modernized multi-apartment house for the insulation of the plinth of the house. Work tasks: 1. To examine the need to increase the energy efficiency of modernized multi-apartment buildings, methods and the most commonly used insulation materials for partitions in Lithuania and abroad. 2. To examine the multi-criteria evaluation methods of TOPSIS and COPRAS and to determine the significance of the indicators of basement wall insulation materials with the help of an expert survey. 3. Carry out the study of basement wall insulation materials by TOPSIS and COPRAS methods and select the most effective basement wall insulation material. 8 Research methods: Analysis of Lithuanian and foreign scientific literature, technical documentation and construction technical regulations, TOPSIS and COPRAS multi-criteria evaluation methods, survey of experts. The main results and conclusions of the research: After a multi-criteria evaluation of the basement wall insulation materials, the TOPSIS and COPRAS methods showed that, despite the method used, the most rational material is Finnfoam XPS FL-300 extruded foam, this material scored the highest in the applied methods. ETNA EPS 100 polystyrene foam boards received the lowest score and are the least efficient material of the evaluated materials. The master‘s final project consists of: summaries in Lithuanian and English, introduction, 3 chapters, conclusions, references. The work consists of 64 pages, 23 tables, 23 figures, appendix. |
