Global Energy

RAR RUS 7-21 DOLBIN Kirill B-7916-2013 6601971248 0000-0002-1173-8727 Peter the Great St. Petersburg Polytechnic University, Russia Korovkin Nikolay nikolay.korovkin@gmail.com

Russia, 195251, St.Petersburg, Polytechnicheskaya, 29

VORONIN Ilia DETERMINATION OF OPTIMAL PARAMETERS OF ACTIVE ADAPTIVE DEVICES FOR LARGE-SCALE POWER SYSTEM MODELS A key direction in optimizing the operating modes of electric power systems (EPS) is the introduction of series compensation devices (SCDs). The paper addresses the problem of determining the optimal parameters of active-adaptive devices in large-scale EPS. The parameters are determined for a pre-known set of prospective SCD installation sites, represented as a Pareto front and obtained using a multithreaded genetic algorithm. A method for formulating optimization objective functions based on the theory of sensitivity of electrical circuits is presented. The objective functions are formulated using criteria of static and dynamic stability, as well as an analysis of steady-state operating modes of the EPS, which is aimed at comprehensively improving the reliability of the EPS. The practical significance of the approach is demonstrated by the calculation example for a typical IEEE network with 300 nodes. The results are presented in the form of sets of Pareto-optimal solutions for various options for the placement of SCD in the network. Preliminary work requires solving the problem of arranging devices in the EPS, which was previously addressed by the authors. 10.18721/JEST.32101 621.31 electric power system multicriteria optimization genetic algorithm series compensa-tion devices optimal parameters of active adaptive devices bilinear theorem https://engtech.spbstu.ru/article/2026.135.1/ dolbin_korovkin_voronin.pdf

RAR RUS 22-34 POLITAEVA Natalia SHINKEVICH Polina OPARINA Anna BIOFILTRATION OF THERMAL POWER PLANT FLUE GASES USING MICROALGAE BIOMASS The article discusses the method of capturing carbon dioxide from the emissions of thermal power plants (TPP). Various methods for carbon dioxide absorption, catalytic purification, cryogenic purification, etc. are considered. Their advantages and disadvantages are studied. As an alternative method for capturing carbon dioxide from flue gases, a method of biofiltration of TPP flue gases with microalgae biomass is proposed. This method allows capturing carbon dioxide and at the same time obtaining microalgae biomass, which can be used as animal feed, as a fertilizer, as a raw material for the production of biodiesel and other valuable components and products. The paper presents the results of a study of carbon dioxide absorption from flue gases of a TPP in St. Petersburg. It is shown that the rate of carbon dioxide absorption by a microalgae suspension was 0.312 g CO2 L–1 day–1. A block diagram of TPP flue gas purification using biofiltration with microalgae biomass is proposed. 10.18721/JEST.32102 628.539:582.263 flue gases purification biofiltration microalgae biomass decarbonization https://engtech.spbstu.ru/article/2026.135.2/ politaeva_shinkevich_oparina.pdf

RAR RUS 35-43 AGAFONOV Dmitry NOVICHKOV Maksim GURIN Sergey PECHERSKAYA Ekaterina SHEPELEVA Anastasiya ELECTROCHEMICAL ACTIVITY AND USE OF BIMETALLIC CATALYTIC STRUCTURES WITH DIFFERENT NI CONTENTS This paper presents the results of a study of the effect of nickel particles on the properties of a bimetallic PtNi catalyst for membrane-electrode assemblies in hydrogen fuel cells. A series of samples with controlled Ni particles ranging in size from 6.0 to 15 nm were synthesized using magnetron sputtering with process time ranging from 30 to 120 s. It was found that fluxes obtained with sputtering times of 60–90 s (Ni particle size ranging from 6 to 8 nm) provide a balanced combination of differential characteristics: developed dendritic structure, active electrochemical surface area, catalytic activity and stability during stress testing. It is shown that deviations from the optimal synthesis parameters, either in the direction or by increasing the sputtering time, lead to degradation of either the catalytic activity or the stability of the system. 10.18721/JEST.32103 541.138 catalyst electrochemical activity ion-exchange membrane hydrogen fuel cell https://engtech.spbstu.ru/article/2026.135.3/ novichkov_gurin_pecherskaya_i_dr__(na_angl_).pdf

RAR RUS 44-52 Imroz M. Basith M. MXenes: an emerging wonder material . . https://engtech.spbstu.ru/article/2026.135.4/ (na_russ_)_imroz_basit.pdf

RAR RUS 53-65 BLINOV Sviatoslav LEVITSKY Alexey. Zotov Oleg zog-58@mail.ru GOLUBKOV Nikita COMPARATIVE CORROSION RESISTANCE TESTS OF NICKEL AND ZINK POWDER COATINGS APPLIED BY COLD GAS DYNAMIC SPRAYING The study conducted comparative tests of coatings deposited on St3sp steel plates using Cold Gas Dynamic Spraying (CGDS) method. The experiments were carried out using a “Dimet – 405” system. Ready-made powder mixtures were chosen as the material for spraying: nickel N3-00-02 and zinc Z-00-11. After deposition, the samples were subjected to mechanical and corrosion tests. As a result of visual inspection, metallographic examination, analysis of corrosion rates and mechanical tests, zinc-based coatings demonstrated superior to nickel-based coatings corrosion properties, while nickel-based coatings have shown higher resistance to cracking during bending. 10.18721/JEST.32104 620.193 corrosion nickel zinc Cold Gas Dynamic Spraying corrosion-resistant coating. https://engtech.spbstu.ru/article/2026.135.5/ blinov_levitskiy_zotov_golubkov_(nikel__i_tsink__poroshkovie_pokritiya).pdf

RAR RUS 66-74 Voevodenko Daniil Starikov Kirill Popovich Anatoliy popovicha@mail.ru INVESTIGATION OF THE EFFECT OF SLM PARAMETERS ON THE MICROSTRUCTURE OF A HEAT-RESISTANT NICKEL ALLOY The influence of the parameters of selective laser melting (SLP) with high-temperature heating of the platform to 1000 °C on the formation of the microstructure of heat-resistant nickel alloy GTD-111 has been studied. It was found that varying the scanning parameters (linear and volumetric energy density) has not significantly affect the size of the γ'-phase secretions. However, a regular spatial heterogeneity of the microstructure was revealed: in the lower layers of all samples exposed to prolonged high-temperature exposure, the initial stage of formation of the raft structure (elongated particles of the γ'-phase) was observed. It was shown that this process was a consequence of particle coagulation under the influence of platform heating temperature and internal stresses, which was similar to the initial stage of alloy degradation under creep conditions. The results of the work are important for the development of SLP modes for monocrystalline products, such as gas turbine blades, in order to control their structure and operational properties. 10.18721/JEST.32105 621.762 heat-resistant nickel alloy selective laser melting microstructure parameters https://engtech.spbstu.ru/article/2026.135.6/ voevodenko_starikov_popovich__issledovanie.pdf

RAR RUS 75-83 Voevodenko Daniil Starikov Kirill Popovich Anatoliy popovicha@mail.ru EFFECT OF SELECTIVE LASER MELTING PARAMETERS ON CRACKING IN HEAT-RESISTANT NICKEL ALLOY The effect of the parameters of selective laser melting (SLM) on the formation of cracks in a monocrystalline nickel heat-resistant alloy with preheating of the substrate to 1200 °C. It was found that an increase in linear and volumetric energy density suppresses cracking, reducing the number of defects, and it is also shown that cracks originate mainly along the boundaries of dendrites in the zones of segregation of alloying elements and the release of carbides Ta and Mo. It is concluded that increasing the energy parameters of SLM reduces the rate of crystallization, ensures more uniform solidification and contributes to a significant reduction in the number of cracks. 10.18721/JEST.32106 621.762 heat-resistant nickel alloy selective laser melting defects cracks parameters https://engtech.spbstu.ru/article/2026.135.7/ voevodenko_starikov_popovich.pdf

RAR RUS 84-94 Ermakov Boris ERMAKOV Sergey Shvecov Oleg shvec_off@mail.ru PRODUCTION OF POWDERS FOR THE MANUFACTURE OF A CORROSION LAYER OF BIMETALLIC PIPES IN ARCTIC OIL AND GAS FIELDS The increased corrosive aggressiveness of the pumped media is one of the modern challenges in oil production and primary fluid processing. One of the ways to increase the equipment resistance to corrosion damage is the use of stainless steels or bimetallic materials in devices that come into contact with aggressive liquids. The aim of this work was to study the effect of the technological parameters of spraying on the granulometric composition and properties of powders 08Cr18Ni15, 07Cr16Ni6 and 08Cr17Ni22 for spraying bimetallic materials onto the welds. According to the research results, the possibility of using stainless steel powders for applying protective anti-corrosion coatings by plasma spraying onto welded joints of components and structures of technological equipment at oil producing enterprises was confirmed. 10.18721/JEST.32107 621.762, 621.774 additive technologies plasma atomizer bimetallic pipes powder steel 08Cr18Ni15 07Cr16Ni6 08Cr17Ni22 weld Arctic https://engtech.spbstu.ru/article/2026.135.8/ ermakov_ermakov_shvetsov.pdf