Analysis of design solutions to improve the energy efficiency of buildings
Students Name: Bondarenko Bohdan Vitaliiovych
Qualification Level: magister
Speciality: Urban Construction and Economy
Institute: Institute of Civil Engineering and Building Systems
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Bondarenko B.V., Marushchak U.D. (supervisor). Analysis of design solutions to improve the energy efficiency of buildings. Master’s thesis. – Lviv Polytechnic National University, Lviv, 2020. Extended abstract. The housing and communal sector is the most energy-intensive in the structure of Ukraine national economy. The main reason for excessively high costs for housing and communal services is its low energy efficiency, which primarily concerns the fund of the first mass construction, which owns the bulk of the total housing stock [1, 2]. Only recently time has developers paid attention to energy-efficient buildings and the use of modern construction methods that can significantly reduce energy consumption in the house, improve living conditions, reduce utility bills and reduce the harmful effects on the environment [3]. Important in the construction of buildings with low energy consumption is the use of efficient building materials, the effectiveness of which is determined at the stage of manufacture, installation (erection) and operation. Precast sandwich panels are a modern energy-efficient building material [4]. Reinforced precast sandwich panel - a structure consisting of two layers of concrete - outer reinforced and inner, between which contains extruded polystyrene, as well as the outer decorative brick finishing layer [5]. The use of these sandwich panels will significantly reduce the cost of construction by reducing the duration of construction processes, the lack of finishing and insulation work, as well as increase the energy efficiency of buildings [6]. The object of research is the efficiency of using modern materials, modeling methods and determining the energy efficiency of building structures. The subject of research is the construction of reinforced precast sandwich panel and brickwork. The purpose of the study: to analyze the design solutions to improve the energy efficiency of buildings, using the comparative characteristics of the external insulated enclosing structures, namely the reinforced precast sandwich wall and brickwork. Structural solutions for improving the energy efficiency of buildings are analyzed, using the comparative characteristics of external insulated enclosing structures, namely reinforced precast sandwich walls with brickwork. A structural comparison of external insulated fencing structures, namely a reinforced precast sandwich wall with brickwork. The calculation of thermal characteristics of structures, heat transfer indicators by transmission, energy consumption and energy efficiency class is carried out. The ecological indicators of the house are determined and the comparative analysis of energy efficient indicators of the public house is carried out by the methodology of modeling of wall constructions with using of PC "Tekla Structures". The evaluation of the efficiency of using a reinforced precast sandwich wall in the construction of buildings is performed. The technological maps of installation of a reinforced precast sandwich wall with a bricklaying are compared. The analysis of the received experimental researches is made and to draw a conclusion concerning possibilities of increase of energy efficiency of the building, using external warmed enclosing designs, namely a reinforced precast sandwich panel, and also the analysis of economic efficiency of the offered technical decisions. Wall structures meet the requirements of the moisture regime regarding the impossibility of condensation of water vapor in the thickness of the structure. The use of efficient sandwich panels for the construction of wall structures of the house with a heat transfer resistance of 5.9 m2K / W, leads to an increase in energy efficiency with the achievement of energy efficiency class of the house for energy consumption - D. Specific primary energy costs times compared to a house with a facade insulation system. At the same time, the share of greenhouse gas emissions decreases from 38.1 kg / m2 to 23.4 kg / m2, which contributes to the ecological situation of the region. Modeling not only the wall panels, but also the entire project using a 3D model in the software package Tekla Structures significantly reduces the time spent on design, but also helps to increase the energy efficiency of the project. Installation of sandwich panels reduces installation time, the use of less labor, which increases the energy efficiency of construction. Key words: energy efficiency, sandwich panel, brickwork, insulation, Tekla Structures, thermal insulation. List of used literature sources. 1. Farenyuk, GG & Tishkovets, A.V. (2017). Global trends in energy efficiency of buildings Science and construction. 2. Sanitsky, MA, Poznyak, OR & Marushchak, U.D. (2012). Energy saving technologies in construction: textbook. Manual. Lviv: Lviv Polytechnic Publishing House. 3. A policy framework for climate and energy in the period from 2020 to 2030 - 22.1.2014 COM (2014), 15 final Communication From The Commission To The European Parliament, The Council, The European Economic And Social Committee And The Committee Of The Regions. 4. Reliable and environmentally friendly materials for construction. [Electronic resource]. Resource access mode: https://euroton.ua/knowledges/vigotovlennya-ta-mater%D1%96ali.html. 5. Henin, E., Morcous, G. & Tadros, M. K. (2014). Precast / Prestressed Concrete Sandwich Panels for Thermally Efficient Floor / Roof Applications. Practice Periodical on Structural Design and Construction. Vol. 19 (3). 6. 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