This study provides an overview of new trends in the development cooling systems for electric motors. It includes a summary academic research and patents implemented by leading motor manufacturers at TRL9. New management air liquid are discussed analyzed with focus on temperature distribution its influence power-to-dimension ratio The prevailing method synchronous asynchronous motors is using external fins, circulation ducts, gaps, fan impellers to enhance efficiency reliability. Internal...

An increase in gas turbine efficiency is possible by inlet air cooling chillers converting a heat of exhaust into refrigeration. In traditional absorption lithium-bromide simple cycle an can be cooled to 15°С. More decrease temperature and greater fuel saving accordingly refrigerant ejector chiller as design cheap. The innovative (TIC) system with high-temperature low-temperature stages for 7 or 10 °C proposed. Its application temperate climate provides annual 1.5 2 times higher compared 15...

Contact cooling using thermopressor technologies is a promising direction for the development of energy-efficient technologies. This technology based on implementation thermo-gas-dynamic compression effect in special contact heat exchangers that consists increasing pressure while decreasing temperature during evaporation finely dispersed liquid injected into gas flow moving at speed close to sound. Upon application charge air engine, following result was obtained: an increase after...

When using modern highly efficient internal combustion engines with lowered potential of exhaust heat the recovery systems receive increasing attention. The efficiency at low level can be enhanced by deep cooling products below a dew point temperature, which is practically only possibility for reducing temperature boiler gas, while ensuring reliability, environmental friendliness and economy power plant. aim research to investigate influence multiplicity circulation difference exit gas...

One of the promising trends to increase fuel and energy efficiency gas turbines is contact cooling cyclic air by using a twophase jet apparatus – an aerothermopressor. The rational parameters work processes aerothermopressor were studied. experimental setup was designed simulate operation in cycle turbine determine pressure losses flow part. Based on obtained data, empirical equation proposed hydraulic resistance coefficient part, depending initial amount water injected. deviation calculated...

The fuel efficiency of marine diesel engine as any combustion falls with raising the temperature air at suction its turbocharger. Therefore, cooling turbocharger intake by recovering exhaust gas heat to refrigeration capacity is a very perspective trend in enhancing engines. application water-fuel emulsion (WFE) enables reduction low-temperature corrosion, and, result, provides deeper utilization boiler (EGB) much lower 90–110 °C during WFE instead 150–170 when combusting conventional oil....

Complex gas turbine schemes with air intercooling are usually used to bring the compression process of working fluid in compressor closer isothermal one. A promising way realize it is use an aerothermopressor. The aerothermopressor a two-phase jet apparatus, which highly dispersed liquid (water) injected into superheated (air) stream accelerated speed closed sound value (Mach number from 0.8 0.9). pressure at outlet (after diffuser) higher than inlet due instantaneous evaporation practically...

One of the promising ways to increase fuel and modern gas turbine energy efficiency is using cyclic air intercooling between stages high- low-pressure compressors. For intercooling, it possible use cooling in surface heat exchanger contact method when water injected into compressor path. In presented research on method, proposed a thermopressor that implements thermo-gas-dynamic compression process, i.e., increasing airflow pressure by evaporation liquid flow, which moves at near-sonic...

This article presents modeling results and a comprehensive analysis of evaporative cooling systems designed for electric motors using the refrigerants R744 (trans-critical), R134a, R600a, R290. study aims to determine most suitable refrigerant use in system, optimize system design, calculate maximum achievable motor power while adhering specified temperature constraints. The was validated by an experimental setup, which had system’s configuration featuring three circuits housing, stator,...

As the analysis of research results has shown, use a thermopressor makes it possible to increase fuel and energy efficiency ship power plant in wide range operation parameters. It can be achieved by cooling charge air before engine inlet receiver reducing compression work turbocharger. A scheme with application system low-speed main for utilizing exhaust gases heat recovery boiler one two pressures was proposed. The thermopressors led decrease compressor consumption, therefore turbine...

One of the most effective methods aimed to improving environmental safety is fuel oil combustion in form specially prepared water-fuel emulsions. The emulsion internal engines makes it possible reduce a rate low-temperature corrosion at wall temperatures below dew point temperature sulfuric acid vapor, install condensing lowtemperature heating surface exhaust gas boiler that leads increase efficiency boiler. Therefore, great importance assess effect presence condensate (water, acid) and...

Multi-server loss queueing system with random volume customers, non-identical serversand a limited sectorized memory buffer Marcin Ziółkowski e145763Model predictive ship trajectory tracking based on line of sight method

This study investigates a low-temperature three-circuit cooling system for 55 kW industrial electric motor. The provides an increase of the power-to-dimension ratio by 63%, together with improvement in motor performance. includes water housing and stator air-cooling motor’s interior. test results show that efficiency was maintained range between 92.5 94.5%, respect to power. With power increases up 90 kW, winding temperature 67 °C observed during three hours operation. advancement is...

This research explores the hydrodynamic processes within flow section of a low-flow thermopressor as jet-type heat exchanger that utilizes instantaneous evaporation highly dispersed liquid in accelerated superheated gas resulting reducing temperature with minimum resistance losses contrast to conventional surface exchanger. The efficiency thermopressor, contact exchanger, is dependent on design and water injection nozzle. Geometric characteristics perform crucial role shaping gas-dynamic...