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Purpose. The research aims to analyze dynamic energy modeling of buildings using EnergyPlus and DesignBuilder software. The primary goal is to assess the energy efficiency, indoor air quality, and energy balance of buildings, taking into account various aspects such as ventilation and dynamic changes in temperature and humidity. Methodology. EnergyPlus and DesignBuilder software were utilized to create detailed dynamic models of buildings. Special attention was given to modeling ventilation and studying the energy balance. Various ventilation modeling algorithms were compared to determine their impact on energy efficiency. Findings. Energy flows in buildings based on dynamic energy balances for the heating period were investigated. A detailed analysis of the influence of ventilation on dynamic energy balances in the studied residential building room was conducted. Originality. This research offers a new perspective on dynamic energy modeling of buildings, expanding knowledge in this field by focusing on ventilation and energy balance aspects. The results contribute significantly to the development of approaches to improve energy efficiency, creating new opportunities for practical applications in engineering design and building operation. Practical value. The obtained results are an important contribution for engineers and designers developing strategies to reduce energy consumption and optimize energy use in buildings. The research can serve as a guide for the practical implementation of dynamic modeling in the planning and operation of buildings to achieve optimal energy efficiency. [ABSTRACT FROM AUTHOR]

Purpose. The aim of the work is to study various aspects of the implementation of the nZEB - concept of buildings in European countries and to identify the main problems and obstacles to the scaling and development of buildings with near zero energy consumption and the use of this experience for Ukraine. Methodology. Analysis of regulatory documents, scientific papers and practices on the use of the nZEB concept in European countries. Findings. A review of legal documents, scientific papers and practices on the implementation and consolidation of the definition of the concept of buildings with almost zero energy consumption in European countries as a complement of a highly energy efficient building and renewable energy sources, energy efficient materials and technologies was carried out. Options for a detailed assessment of the new construction of the nZEB residential sector were considered. The impact of possible climate change on the characteristics of nZEB during the life cycle, including heating and cooling needs, is analyzed. Examples of the implementation of the nZEB concept in the renovation of buildings for various purposes are given. The emphasis is on the possible inconsistency and harmonization of nZEB standards with the best financial solutions and the sequence of implementation of approaches to ensure near zero energy consumption by buildings for various purposes for different climatic regions of Europe, the main challenges and obstacles in increasing the share of use of such buildings are analyzed. Originality. Various aspects of the implementation of the nZEB concept are grouped and analyzed, from regulatory documents, government incentives, balance in the concept of energy efficient solutions and the share of renewable energy sources, to technical and cultural-behavioral barriers. Practical Value of the work lies in the use of the above approaches and the experience of European countries for scaling the houses of the nZEB concept in the conditions of Ukraine. [ABSTRACT FROM AUTHOR]

Purpose. The purpose of the study is an experimental analysis of the behavior and changes in thermophysical properties of the most widely used thermal insulation systems during their entire operational life. Method. In order to study the thermophysical properties of various options for the thermal insulation of wall-enclosing structures, measures were taken to modernize the administrative building and a complex for the study of heat losses was developed. A comparison of experimental data obtained during the operation of heat-insulating structures over a long period of operation is carried out. Results Experimental data on temperature fluctuations and the distribution of heat flow density of a thermomodernized section of a wall-enclosing structure insulated by various methods were obtained from February 16-17, 2013 and January 16-17, 2022, and a comparison of the values of the actual coefficients of thermal conductivity of various heat-insulating materials in the first approximation was carried out. Scientific novelty. The need to assess the influence of the service life on the thermal and physical properties of heat-insulating materials used in thermomodernization of buildings of various purposes is experimentally substantiated. Practical significance. An important factor that is not taken into account when designing heatinsulating shells is presented and constructed, and the way of its research is indicated. [ABSTRACT FROM AUTHOR]