The method of work is the development of theoretical foundations and practical tools for the optimal functioning of hybrid energy systems based on low-power renewable energy sources and energy storage systems, to ensure the reliability and security of electricity supply and create a technical opportunity for the further decarbonization of the Ukrainian energy sector.

The object of the study is the processes of generation, storage and consumption of energy in hybrid renewable energy systems and measures aimed at increasing the efficiency of their functioning.

The purpose of the work is an experimental study of the real operating conditions of the processes of evaporation and condensation of steam-air mixtures in the field of action of centrifugal forces at atmospheric pressure, on a rotating sieve nozzle, determination of the hydrodynamic features of the operation of the rotating nozzle.

Development of a distiller design to meet high requirements for the concentration of thermolabile substances of various initial composition.

An approach to assessing the available resources of territories and human potential in the new conditions of existence of a constant military threat has been developed.

Methods and models for assessing barrier characteristics of territories, finding priority locations for population placement, means of production, construction of new infrastructure facilities, and formation of defense structures have been developed.

Experimental samples of flat-oval thermosyphons (TS) with partial transverse rectangular and corrugated finning and samples of round TS with inner intensifiers of heat transfer in evaporation section (ES) were developed and fabricated. They are intended for functioning in heat exchangers (HE) utilizers of heat wastes in ventilation systems. It was shown, that freon R134a is the most optimal heat carrier for TS functioning in conditions close to these in ventilation systems from the point of boiling temperature and safety of application.

Methodological, mathematical, algorithmic and software maintenance and support services have been developed and improved for optimizing structure, parameters and operation modes of new and improved solutions in cooling and heating systems based on heat pumps taking into account dynamic modes and exergy analysis. A new approach for calculating avoidable parts of exergy destruction, costs and environmental impact within the components of energy conversion systems has been developed and applied without the need to define the ideal state of a component.

A novel theoretical and practical development for highly efficient traction electromechanical systems based on the induction and synchronous reluctance motors is presented, which allows to overcome the problem of permanent magnets limited availability. New nonlinear and adaptive control methods have been developed for traction electrical drives and hybrid energy storage systems based on batteries and ultra capacitors. The theory of vector control systems design was extended to class of highly saturated electric motors using their improved mathematical models.

Scientific knowledge was obtained regarding the kinetic complications of direct electrochemical oxidation of nitrogen oxide on metal modifications and the possibility of oxidation of nitrogen oxide by a homogeneous iodine-iodate mediator redox system in an aqueous solution was thermodynamically proven, the kinetic feasibility of which was experimentally proven due to the revealed exclusive selectivity of semiconducting titanium dioxide on the surface of the titanium base to halogen mediator reduction reactions.

The work is aimed on the improvement and testing of the subsystems of the university nanosatellite (NS) of Cubesat format through the development, modeling and research of service subsystems to ensure the payload - an optical-electronic scanner with the ability to image the Earth's surface in the visible light range with the resolution of 15m to 30m when operating in orbit with an altitude from 400 km to 700 km, by the efforts of students, master's students, post-graduate students and research staff of Igor Sikorsky Kyiv polytechnic institute.

An information system for monitoring changes in the land cover of the territories based on satellite data was created. The system is integrated into the Information and Analytical Situation Center of the Igor Sikorsky Kyiv Polytechnic Institute.

A complex of methods and models has been developed, based on which the degree of transformation of land cover types is evaluated, critical changes are identified, and their classification by type of transformation is carried out. Methods used to identify transformations: