energy efficiency

Macromodeling of electrical grids with renewable energy sources for assessing their energy efficiency

In the article it is proposed to use macro-modeling of electrical grids for assessing the quality of their operation in the form of an integrated readiness characteristic of electrical grids with RES. It has been done on the basis of the analysis of the problems of providing high-quality electrical supply under conditions of the intensive development of renewable energy sources (RES) and characteristics of electrical grids determined by means of qualimetry that are essential for providing high-quality electricity.


The influence of structural and thermal parameters of window structures on energy consumption in a house of a residential type is analyzed in this article from the standpoint of providing the required level of natural lighting and minimizing of transmission losses. It was shown, that modern buildings are characterized by a much larger proportion of the area of window structures, which requires a special analysis of the effect of translucent enclosures on the energy performance of buildings.


The article analyzes the problem of carbon dioxide emissions in the construction industry and calculates the energy efficiency of an multicomfort house. The potential for energy savings and CO2 emission reductions remains largely untapped due to the removal of technologies from new construction, the lack of effective environmental policies and insignificant investments in energy efficient buildings.

Power-efficient Direct Torque Control in a Two-zone Pmsm Drive for Electric Vehicle

This work presents the electric control system for electric vehicle drive based on the strategy of direct torque control of a synchronous machine with permanent magnets. In order to provide energy efficiency in the first zone of angular speed regulation, the reference of the armature flux is formed depending on the current value of the electromagnetic torque of the machine.

High Density Highperformance Computing Systems Cooling

The paper deals with the cooling approaches and aims at using solutions for the energy efficient and economically viable high density computing system construction and usage. Power consumption of the standalone high density computing systems and supercomputing clusters with different types of cooling has been considered and their characteristics have been estimated. The influence on the overall budget of the system construction and exploitation for 5 years of life time has been analyzed.


Energy conservation is becoming increasingly more relevant for Ukraine and the world, and architectural education must meet one of the most significant challenges of our time. The article analyzes the existing laws and regulations of our country and points out to the lack of a number of national standards necessary for architectural design. It focuses on the problems of real design and ways to solve them within the framework of architectural training.

Архітектура багаторівневої системи управління енергоефективністю регіону

The list of problems that can be solved by multilevel system of energy efficiency of the region were determined. Requirements for the implementation of each system component were formulated. It was shown that the technological process control’s components should provide processing of intensive data streams in real time. Also components have to satisfy limitations on size, power consumption and cost.

Adaptive Radio Resources Management Considering Noiseimmunity Conditions

Operation of radio communication systems for special purposes (FSA SP) in practice is random in terms of various factors, some of which are codified in standards, and some — previously known. Specificity of modern shipyard JV determines the need to manage their operations in terms of parametric uncertainty as facility management and signaling uncertainty of external influences. So the challenge is the analysis and consideration of uncertainty arising from the operation of such a complex hierarchical system as the FSA SP.

Energy Efficiency of Refrigerating Ejector Systems for the Condensation of Oil Product Liquid Hydrocarbons

The oil processing enterprises are the largest consumers of fuel and energy resources, heat and electrical energy. Efficiency, rationality of their use in oil refining processes in many respects is defined by overall performance of processing equipment. Feature of processes for processing a hydrocarbon raw material is that technology processes are imperfect. One of the priority directions of increase in efficiency of energy saving of oil processing productions is the maximum use of recuperation of warmth and optimization of operating modes of technology installations.

Determination of Energy Efficiency Acoustic Devices in the Optical Transport Network Using 3D-Analysis of Electromechanical Coupling

In this paper we investigate electromechanical coupling coefficient. We show the investigation importance of spatial distribution coefficient of electromechanical coupling. This parameter characterizes the energy efficiency of piezoelectric transducer that in turn affects the acousto-optic devices in optical transport networks. We present basic definitions and types of electromechanical coupling coefficient. We also show the formula for determining the coefficient of electromechanical coupling that facilitates study of the spatial distribution of this coefficient.