Energy and energy efficiency

Aluminum two-phase heat transfer systems with steam and liquid separation for energy efficient technologies

Comparison of designs of heat exchangers with smooth-walled aluminum grooved heat pipes (AGHP) with a diameter of 8 mm and finned AGHP with an outer diameter of 43 mm. The use of smooth-walled AGHPs, on the one hand, results in a larger number of them in the heat exchanger compared to the finned AGHPs, but, on the other hand, results in a smaller pressure drop in the channels. On the basis of the experimental data, dependences were obtained for the calculation of the coefficients of heat exchange and aerodynamic resistance for a heat exchanger with smooth-walled AGHPs.

Development of efficient electrobus electromechanical system based on adaptive vector- controlled induction motor drive with accumulator-ultracapacitor power source

An experimental electrical drive for electric buses and traks is developed and experimentally tested. Developed power converter for induction motor based electrical drive provides 100 kW of output power. Flux-torque (speed) control algorithms for induction motor are developed, implemented and experimentally verified. Developed nonlinear controller take into consideration motor's magnetizing curve provides asymptotic flux-torque (speed) tracking, torque per Ampere maximization (MTA) as well adaptation to stator and rotor resistances.

Management of municipal facilities energy consumption

The main structural schemes of interrelations between the subjects of the thermal energy market are determined and the corresponding models of the thermal energy market are proposed depending on the localization level of the heat supply system. Effectiveness of the system was analyzed for two alternatives: monopoly and competition. Modeling the interaction of market participants was done using different technologies for the production of heat energy, in a competitive environment.

Thermomolecular accumulator with the new working medium based on heteregenious liophobic system.

The new results were obtained on the principles of thermomolecular energetics (TME) as a new theory of the use of potential energy of intermolecular interaction on developed surfaces in applied applications of accumulators with high specific (volumetric) energy capacity, with less consumption of structural materials. Three samples of the new type of accumulator with a high specific energy capacity have been created, which work on the principles of thermomolecular energetics using heterogeneous lyophobic systems as a new working media.

Improving energy and resource efficiencies parameters on basis power electronics for highly reliable technology for welded joints of heterogeneous materials

The object of research work is electromagnetic processes in the system "power grid - power converter - non-stationary load". The aim of the work is to increase energy efficiency and resource saving by means of power electronics for the technology of obtaining highly reliable welding joints of heterogeneous materials.

Development of resource saving system of power supply of cubeSat nano-satellites with thermal control solar cells

As a result of the work, an energy saving power supply system was created for the university space vehicle - nanosatellite (NS) PolyITAN-2 of the 2U CubeSat format when solving an important applied task - full-scale nanosatellite measurements of the parameters of the lower Earth thermosphere in the international project "QB50". Energy saving is a necessary condition of long period of functioning of NS.

Methods and tools for structural and parametric identification of electrical systems, processing line for the production of domestic cable with polymer-insulated extra-high voltage

In order to improve the quality of cable products, the idea of a multi-level system of structural and parametric identification of objects of the electrical complex of the technological line for the production of domestic cable with polymeric insulation on ultrahigh voltage is aimed at the main task. Systems guarantee correct, optimal for the main indicator of the quality of the solution of the problem under real conditions of structural, parametric and signal uncertainty and space-time limited data.

Heat transfer and gas dynamics of surface-vortex film cooling configurations of high- performance gas turbine engine blades

The novel technology was developed of heat transfer, gasdynamics, and film cooling efficiency prediction of high-performance gas turbine blades providing high accuracy of calculations.This technology takes into consideration stationary conditions and rotation of of cooled surface, blowing ratio, external flow speed, surface geometric shape (flat, concave, or convex), surface indentations configuration (spherical or rectangular), multi-row of coolant supply.

Expansion of the fuel base and improvement of environmental indicators of stationary and self-propelled systems with diesel engines through the use of gas diesel cycle

A universal gas diesel fuel supply system with microprocessor control (MPSS) for the conversion of diesels of stationary and transport facilities of average power, including military engines, to work on the gas-diesel cycle, which allows to improve the energy and environmental performance of the engine, reduce the consumption of diesel engines more expensive diesel fuel and attract cheap fuel for environmentally friendly gas to the fuel fund.

The increasing of efficiency and economy of the operation of the energetic equipment under different kinds of fuel and conditions of the load control

The experimental curves of the creep and the long-term strength of 25Kh1M1FA steel have been scientifically substantiated and proved by studying of the rotor of power unit No. 9 on the Luganskaya TES which had worked 275 thousand hours and reproduced all aging processes for the entire period of operation. The experimental curve of the long-term strength is supplemented taking into account the creep, which was limited a range of 175 thousands hours, up to 375 thousands hours.