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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]

Purpose. The main purpose of the study is to create energy-efficient solutions when designing the lighting of the entrance group for the case when the object must provide round-the-clock operation Methodology. To achieve this goal, a method for multi-level connection of light sources of different intensities has been developed. The control of the processes of level regulation is carried out using motion sensors. Results. The modern level of LED products makes it possible to use LED lighting sources as universal ones, allowing you to implement any design solution. The introduction of motion sensors as elements for regulating the intensity of light allows to obtain more than 50% energy savings. Interesting design solutions help create light accents without creating too much lighting on certain objects. Scientific novelty. The work combines multilevel lighting systems using motion sensors as switches operating at night. The authors proposed a sequence of connecting the levels of the system to create the most comfortable stay and a good first impression of the institution. Such a system makes it possible to use lighting not only for practical purposes, but also for the most attractive visual appearance. Practical significance. The versatility of this methodology allows it to be applied to objects of various purposes, including round-the-clock service. However, it is important to plan for such a lighting system even at the design stage of the building in order to obtain the maximum economic benefit. [ABSTRACT FROM AUTHOR]

Purpose. Development and analysis of the main indicators of the investment project of the thermo-modernization of the student campus KPI and energy consumption management for the development of monitoring and integration in the educational process. Method. The technical and economic analysis with use of engineering methods of calculation, experimental measurements with use of the laboratory equipment is executed. General scientific methods of analysis and synthesis, specific methods (grouping, comparison, generalization), statistical data processing, modeling in specialized software products are used. Results. Reduction of total consumption of energy resources, as well as monetary costs for their payment; creation of conditions and tool base for research works; improving the quality of educational services, involving students in energy audits; software development and creation of an automated energy consumption monitoring system. Scientific novelty. A comprehensive approach to the development of investment projects to improve the energy efficiency of campuses, taking into account technical, economic and environmental indicators with in-depth engineering analysis of the characteristics of buildings and their engineering systems. New approaches to the development of an automated workplace of an energy manager with structural elements of the software of the energy monitoring system are proposed. Practical significance. An investment project of complex thermal modernization of student campus buildings and modernization of engineering networks of individual buildings with a choice of equipment and development of placement schemes has been developed. The main technical, economic and environmental indicators of the project are determined. An important educational direction is to involve students in the process of developing investment projects using modern technologies on the example of campus facilities, which will create an environment for comfortable learning conditions and research. The implementation of the investment project will allow to create a modern energy-efficient site with the use of innovative solutions on the basis of the existing old building stock. [ABSTRACT FROM AUTHOR]

Purpose. Development of electronic monitoring and control system for achieving an effective ratio between electrical energy generation and consumption in the local object power supply system. Methodology. The theory of electrical circuits and electronic circuits were used. Obtaned results. The electronic system for monitoring and controlling power supply in the local object power system was developed. The system comprises three modules: central processor, module for monitoring environment parameters and executive module which consists of measuring (current, voltage) and relay blocks. The central processor processes signals from monitoring and measuring blocks and forms executive commands on relay block in order to switch on/off consumer loads and electric generators. Developed systems alowes both maximal power take-off from distributed (renewable) energy sources and flexible implementation of power consumption regulation for achieving an effective ratio between the generation of electrical energy provided by renewable energy sources and the general distribution network, and the total load device consumption in the local object power system. Orginality. The electronic monitoring and controlling system in the local object power system alows providing generated and consumed loads monitoring in the real time. The system provides an ability to form real time energy profiles based on which the control algorithm for executive block control is formed in order to achieve an effective ratio between generation and consumption of electricity in the power system of the local facility. for in power consumption control system has been developed, which consists of a central processor, monitoring and executive units. The monitoring unit allows you to create energy profiles in real time, on the basis of which the control algorithm in the executive unit is formed in order to achieve an effective ratio between the electricity generation and consumption in the local object power system. Practical value. As a result of the presented work, an electronic system for monitoring and controling electricity supply in the local object power system with the defined formation of distributed energy sources generation and required consumption profiles in the real time was developed to provide efficient energy consumption according to the concepts of distributed electrical networks with renewable energy sources and Smart House. [ABSTRACT FROM AUTHOR]

Purpose. Consider ways to stimulate heat and energy conservation in Ukraine and other countries, based on an analysis of the legal framework and practical experience. Methodology. Review and analysis of the Energy Strategy of Ukraine for the period up to 2035 “Security, Energy Efficiency, Competitiveness”, Laws of Ukraine “On Energy Saving”, “On Energy Efficiency Fund”. Review and analysis of the practical experience of applying different ways of stimulating energy saving, improving the efficiency of use of fuel and energy resources by economic entities, consumers in the housing sector in Ukraine and other countries. Findings. The ways of stimulation of heat and energy conservation in Ukraine are proposed, which envisage both the system of financing of projects of resource saving and ways of informing consumers about the energy efficiency of new equipment (through marking), buildings, households. Originality. The main directions to be developed for efficient management of energy efficiency projects, in particular, the efficient functioning of district heating; combined production of thermal and electric energy; use of local renewable energy resources; introduction of resource-saving eco-friendly technologies. Practical value. The legislation, which provides financial and informational ways of stimulating energy and heat conservation, as well as ways of financially filling the energy efficiency fund in Ukraine and the corresponding funds in other countries, is considered. The operation of the Energy Efficiency Fund is necessary for the provision of tax benefits, subsidies (targeted state and others), irrevocable appropriations for various types of energy conservation works, for the introduction of new types of energy saving equipment and technologies. [ABSTRACT FROM AUTHOR]

Purpose. Creation and development of organizational structure for managing campus energy consumption and enhancing responsible consumer behavior through their involvement in operational activities. Methods. The engineering aspects of an energy management system formation for various types of end consumers are considered. General scientific methods of analysis and synthesis are used, specific methods (grouping, comparison, generalization), technical and economic analysis, experimental methods. Results. Reducing the total consumption of energy resources, as well as cash costs for their payment; creation of a tool base for research work; improving the quality of educational services, engaging students in energy audits. Scientific novelty. An integrated approach to in-depth analysis and planning of energy consumption was developed, the procedure for assessing the energy efficiency of buildings taking into account temperature, weather and operational factors was improved. The practical significance. Proposals for creating an energy-efficient campus using modern technologies and innovative solutions for energy supply, energy monitoring, energy management are presented. The educational goal of the project is to attract students to the process of creating and implementing real innovative energy supply projects using the example of the campus where they study. This will create an environment with comfortable conditions for research, education and life. Realization of the complex project "Smart Network" will show how it is possible to create a modern energy efficient platform based on the existing old building stock using modern technologies and innovative solutions of energy supply, energy monitoring, energy management. [ABSTRACT FROM AUTHOR]

Purpose. Development of a software complex for increasing energy efficiency of the city district due to implementation of optimal energy saving measures. The article considers the problem of increasing the efficiency of use of fuel and energy resources in Ukraine, rational use of energy in energy resources is justified, because the existing energy saving potential is quite large. Methodology. The article uses the system-structural approach to solving the energy efficiency problem of a separate energy consumption area of the city. As a mathematical apparatus, a rank analysis is used, which refers to the method of researching the technocenosis of energy consumption, which implies further optimization based on the criteria of the form of hyperbolic H-distributions. Results. The program "Smart Technocenosis" is presented for optimization of technocenosis energy consumption of the city district on the example of Solomyansky district of Kyiv, which is intended for analysis and increase of energy efficiency of energy consumption of objects of the budget sphere. Also, an example of calculations on the electricity consumption parameter made on the basis of the software system is considered. Originality. It was developed and proposed to use the software complex "Smart Technocenosis" to calculate the potential of energy saving and detect abnormal objects for the consumption of electric energy, thermal energy and gas. Practical significance. When using the "Smart Technocenosis" software program in the areas of energy saving in the city of Kyiv it is possible to achieve reduction of consumption of energy resources by objects of the budgetary sphere, reduction of expenses for fuel and energy resources and increase of comfort level in buildings of budgetary sphere with observance of sanitary-hygienic norms. [ABSTRACT FROM AUTHOR]

Purpose. Explore the possibilities of management programs usage to control electricity demand in Ukraine. To develop an optimization mathematical model of the power consumption regime based on key indicators of the consumption schedule estimation and equipment flexibility factors. Methodology. Proved that as a result of demand side management programs for electricity are benefit of only for consumers and energy companies, but also for a whole society. Classification of demand management programs for electricity according to spheres of action presented. The article deals with the method for electricity consumption daily schedule optimization while implementing electricity demand management programs. Findings. The effects of demand management programs implementation and reducing consumption schedule unevenness problems based on optimization task with the schedule coefficient and the cost of electric energy reduction have been analyzed. The conducted variants research of demand side management programs influence on possibilities of electric energy consumption schedule modification confirmed the possibilities of increasing power systems functioning efficiency. Originality. Optimized energy consumption graphs are obtained based on key indicators for a group of the same type consumers, considering consumer interests, which enables to assess the effect demand side management programs implementation. Consumers peculiarities are considered by coefficient of their demand flexibility kг. Practical value. The mechanism for the DSM innovation programs for optimizing power consumption regimes introduction possibility evaluation has been obtained. Established that domestic electric energy consumers have a significant potential for peak consumption reduction by usage of demand side management programs aimed at costs reduction for consumers and increasing the electrical consumption schedule filling ratio for energy companies. [ABSTRACT FROM AUTHOR]

Purpose. Application of complex approach to the creation of holistic educational platform of project activities in the field of energy efficiency. Methodology. The well-known personal-oriented methods of quality assurance of educational services are used as the basic factors of creating a complex set of skills, knowledge and competencies in the sphere of energy efficiency and an innovative process of obtaining them for students with different basic professional level. Findings. The realization of project-oriented educational platform involves the use of personalized learning technologies with the use of base of engineering and scientific projects to increase energy efficiency; allows forming elastically the content of the modules of multi-level training of students with a unique set of practical skills, knowledge and competences for each using the innovative process of obtaining them. Originality. The basic principles of educational platform for project activities in the field of energy efficiency creating are formed, the components of which have a multi-level structure for training and advanced training, implemented in the form of interconnected modules, courses, trainings that allowing to choose an individual educational trajectory for the hearer, taking into account the direction of specialization and professional interests. Practical value. Research results can be used in the creation of educational and research centers of energy efficiency to support the development of energy efficiency and renewable energy sectors, comprehensive training of business representatives, public institutions, trade unions and research institutes wishing to receive knowledge about the development and implementation of energy efficient projects and also when organizing program activities and initiatives with international representatives who are involved in their implementation. [ABSTRACT FROM AUTHOR]

Goal. Develop energy-efficient machines with a complex movement of working tanks for the finishing of parts and obtain dependencies to determine the power they consume. Method. The development and research of constructive and kinematic parameters of the machine was carried out using the SolidWorks 2012 automated design system, and experimental research was carried out on a specially designed experimental installation with a complex spatial movement of the working capacity. Results. The designs of machines with complex spatial movement of working tanks are developed, which provide high-performance finishing of parts in mass. The analytical study of the power consumed on the driving shaft of the machine with the complex spatial movement of the working tanks has been carried out. An equation is obtained which allows to calculate the maximum value of the power consumed on the driving shaft of the machine. It is shown that the proposed equipment and methods of processing are more energy efficient (in 2 - 3 times) than traditional ones. Scientific novelty. An interconnection between the angular speed of the drive shaft, the dimensions of the working tank, the mass of the machine links and the working medium loaded to the capacity and the power consumed on the driving shaft of the machine for machining parts in mass are established. Practical significance. An equation is obtained which allows to calculate the maximum value of the power consumed on the driving shaft of the machine, and also new designs of machines with complex spatial motion are developed in which drives are used that allow to realize the necessary law of change of angular velocity. [ABSTRACT FROM AUTHOR]

Purpose. Improvement of the approaches to the creation and processes of the functioning of electrotechnological sewage treatment systems for industrial facilities in accordance with the requirements of environmental safety and rational use of energy resources. Method. By means of the analysis of modern methods of water purification of industrial facilities, intelligent control over the removal of pollutants of effluents is proposed on the basis of the synthesis of control algorithms and the implementation of object-oriented technological regulations for the operation of combined electrotechnical water treatment systems, taking into account the requirements of ecological safety and reducing energy consumption levels. Results. The work substantiates and practically realizes the approaches for the development of object-oriented technological regulations of combined electrotechnical water treatment systems for industrial facilities. Originality. The method of synthesis of algorithms for control and development of object-oriented technological regulations of combined electrotechnological systems for water purification of industrial facilities with increased energy efficiency was developed, taking into account the operation of abnormal situations of technogenic and natural origin. The practical significance. On the basis of specialized software, algorithms for managing the electrotechnological plant for water treatment have been developed, and object-oriented technological regulations for managing the operation of combined electrotechnological sewage treatment systems for industrial facilities have been developed to reduce power consumption. [ABSTRACT FROM AUTHOR]

Purpose. Power factor improvement and the corresponding values of the efficiency index through shunt active filter for three-phase power system. Methodology. Energy efficiency of the electrical engineering complex "shunt active filter Cables for Power Systems" is estimated by ratio of Energy loss from inverters to power cables. It's proved the analytical usefulness of shunt active power filter in terms of energy efficiency. Results. This paper surely contains solutions to extremal problems for parameters that determine the output performance of three-phase power system in the Nonsinusoidal Operation Modes: the full power of a ratio four-resistances of the power cable determination; power loss minimization and maximizing power factor. Scientific novelty. For the first time the method for upgrades to improve efficiency through the use of shunt active filtering for energy efficiency estimation of three-phase four-wire system was proposed and it can improve the load power factor with account of filter's intrinsic losses. Practical significance. The new analytical dependence applicability of shunt active filter for increasing energy efficiency of four-wire major power system was obtained. These correlation functions are capable to substantiate the selection of hardware components and switching frequency of power inverters for shunt active filters at design. [ABSTRACT FROM AUTHOR]

Purpose. To consider the traditional and new methods of energy generation, as well as problems of power industry and improving energy efficiency of technological objects. Methodology. Review and analysis of conventional and non-conventional energy sources and the use of the structural model for the analysis of energy efficiency of technological objects. Findings. Alternative types of power, improved methods for their preparation and methods for improving energy efficiency of technological objects are considered. Originality. An analysis of major energy losses that occur in technological objects. Practical value. It has been introduced that In order to reduce energy losses in electromechanical systems , it Is important to improve the quality of processes and efficiency of electrical devices and appliances. [ABSTRACT FROM AUTHOR]

Purpose. Energy efficiency public sector schools. Analysis of energy efficiency, development of strategies for their implementation. Methodology. The applied systematic approach to the analysis of energy systems as a whole on real objects of the university. Findings. It was developed, comprehensive technical and economic calculations and implemented energy efficiency measures, which are used in the educational process, scientific work of teachers and students. The analysis of energy efficiency measures and strategy of their development and implementation. A business plan implementation of certain measures and the university as a whole. Originality. It was proved that ensuring energy-efficient operation of public sector institutions is possible only if a systematic approach to the measures implemented. A rating action on various grounds. Practical value. Implemented a number of energy efficiency measures that significantly reduce the cost of funds to pay for heat. [ABSTRACT FROM AUTHOR]

Purpose. Automatized and energy effective control system is developed for a block type hall of residence lighting. Methodology. Application of AVR microcontrollers and program realization of lighting control for energy saving. Findings. Energy effective control system is developed and manufactured for energy saving. Originality. Development of engineering methods for automatic systems of control lighting systems design and calculation. Practical value. The developed control system can be used in a block type hall of residence lighting for energy saving. [ABSTRACT FROM AUTHOR]

Purpose. Development and technic-economic comparison of energy efficient solutions for a typical 5-storey residential building project, exterior envelope resistance to heat of which does not meet modern requirements. Methodology. To determine the energy performance of the building the methodology of building energy passport drafting according to ДСТУ-Н Б А.2.2-5:2007 was used. Findings. Thermomodernization of buildings leads to significant cost savings for heating. Thus, the introduction of energy-efficient solutions for the building test type design can lead to the following achievements: replacement of windows by more energy efficient ones leads to a reduction of energy consumption for heating by 14,7%; insulation of external walls with bringing heat resistance to the normative values reduces heat losses by 40.4%; the most quantity of heat energy conservation (76,8%) is achieved by the integrated approach (external building envelope insulation, installation of energy efficient windows, the introduction of automation control unit for one-pipe heating system and auto-heat auto-regulation of heat transfer of heating radiators). Knowing the value of investments in energy saving measures, we can calculate the payback period of these measures and determine the optimal energy-saving solution. Originality. The options for improving energy efficiency of a typical residential building project were investigated and analyzed and the structure of the heat losses of the building prior to and after the thermomodernization was determined. Practical value. The analysis and comparison of variants of thermal energy saving solutions of the building can be used to determine the best option and identify ways to further improvements the energy efficiency of buildings. [ABSTRACT FROM AUTHOR]

Kirovograd National Technical University Purpose. Reducing the cost of funds for the purchases of the energy resources by increasing the level of the energy efficiency. Methodology. The methods of comprehensive complex energy audit and analysis of the synthetic fuel and energy balance are used. Findings. The possibilities of the energy saving are found and their ranking in order of priority of their implementation is conducted. Originality. Taking into account the specificity of the object of the energy audit and the peculiarities of the regimes of the energy usage allowed to improve the model of the energy management system, which is to perform oversight functions concerning compliance of the norms and regimes of the energy usage and allows to systematize the priority tendencies and projects to increase the energy efficiency. Practical value. Results of the energy research allowed finding out the reserves of the energy saving and reducing costs on the payment for the energy carriers. [ABSTRACT FROM AUTHOR]

Purpose. Identification of problems associated with inefficient energy use in educational institutions and analysis of methods for increasing levels of energy efficiency at Ukrainian HEIs. Methodology. Method of analysis is used for comparative analysis of the information field of the university and its competitors and identification of strengths and weaknesses of the HEI information policy. Findings. The study revealed main causes of excessive energy expenditures in public sector and ways of solving issues related to inefficient energy use in educational institutions. We performed analysis of existing evaluation methods of energy efficiency, energy audits of buildings, development and implementation of effective programs for energy efficiency increase. Originality. We studied energy efficiency benchmarking as one of the instruments to support and continuously improve performance in energy saving of universities. Practical value. A coefficient of energy efficiency (KEE) for comparison of facilities` energy efficiency according to the methodology of energy efficiency benchmarking is proposed. [ABSTRACT FROM AUTHOR]

Purpose. Notation and analysis of energy efficiency criteria for subsequent budget buildings creating an information system to support decision-making on the initiation energy saving projects. Methodology. Used the well-known methods of analysis, synthesis, system integration to create in the future of information decision support system for implementation in energy efficiency projects. Findings. During the implementation of the following criteria identified energy efficiency as thermal imaging diagnostics and monitoring, which will allow the further formation of the factors influencing the energy efficiency of buildings in the budget. Originality. The character of the influence of television filming, as part of the budget monitoring systems express buildings. Practical value. According to the established laws of defined tasks thermal diagnostics and monitoring, as criteria for energy efficiency. [ABSTRACT FROM AUTHOR]

Purpose. The energy security level increase at higher educational institutions by means of effective use of energy efficiency potential. Methods. The following general scientific methods were used: expert analysis (from the problems of effective use of the energy resources), analytical and system method (for guidelines detection for implementation of the energy efficiency potential), economic analysis and diagnostics (for grouping, generalization of the energy saving measures) Results. The opportunities for energy saving at higher educational institutions were examined, measures for implementation of the energy efficiency potential at higher educational institutions were proposed. Scientific novelty: The problems of energy saving were examined, the energy efficiency potential as a priority direction of the energy security level increase at higher educational institutions was defined. [ABSTRACT FROM AUTHOR]