Global Energy

MIS RUS 7-21 Liu C. Carbon nanotubes . . https://engtech.spbstu.ru/article/2024.128.1/ CHan-Lyu.pdf

RAR RUS 22-34 Kadi-Ogly Evgeny 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

CALCULATION METHOD OF MAGNETIC FIELD, CURRENTS AND LOSSES IN THE ARMATURE WINDING OF AC ELECTRICAL MACHINE BASED ON FIELD-CIRCUIT FORMULATION This paper describes a calculation method of distribution of the magnetic field, currents and losses in the slot parts of AC machines armature winding bars. The method is based on modeling of AC magnetic field by finite element method in 2D formulation with linked electrical circuit and taking into account the transposition of strands along the length of the bar slot part, the curvature of magnetic core, the location of the bars in the stator slot, the features of the machine slot geometry and the diagram of armature winding connections. The method allows simulating different conditions of the winding operation. A comparative analysis of the calculation results based on a generalized AC electric machine shows the acceptability of the proposed method. This method could be recommended for calculating of the losses of transposed AC windings in the design and analysis of electrical machines. https://doi.org/10.18721/JEST.30201 621.313.322 Electrical machine magnetic field armature winding strands transposition losses in winding https://engtech.spbstu.ru/article/2024.128.2/ Kadi-Ogli%2C-Korovkin.pdf

RAR RUS 35-48 KALASHNIKOV Aleksandr CHERNOV German EVDOKIMOV Vladimir MATHEMATICAL MODEL OF THE WASTE HEAT RECOVERY SYSTEM OF A MOBILE COMPRESSOR STATION BASED ON A REFRIGERATION UNIT This paper analyzes the influence of the main parameters of the waste heat recovery system (WHRS) of a mobile compressor station (MCS) on its efficiency. The paper presents a WHRS chart of MCS based on the use of a refrigeration unit for pre-cooling of the compressed gas. Additionally, a mathematical model has been developed to determine the efficiency of the system and to calculate the devices and units that are part of the system. Based on the developed mathematical model, an analysis of the dependence of the fuel efficiency coefficient on the efficiency of the WHRS devices and units was conducted. The results obtained showed that the primary contribution to the operation of the WHRS based on the refrigeration unit is made by the heat discharged from the engine – the compressor drive, and it was demonstrated that an increase in the efficiency of the WHRS devices led to an increase in the fuel efficiency ratio, which can reach 25%. https://doi.org/10.18721/JEST.30202 621.43 + 621.51 mobile compressor station Rankine cycle waste heat recovery system refrigeration unit mathematical model https://engtech.spbstu.ru/article/2024.128.3/ Kalashnikov%2C-CHernov%2C-Evdokimov.pdf

RAR RUS 49-73 Kalyutik Alexandr Treshchev Dmitriy Kravchenko Sofia USE OF RDF TO GENERATE ELECTRICITY IN A COMBINED CYCLE GAS TURBINE PLANT AT A CHP PLANT IN ST. PETERSBURG The study is devoted to the substantiation of a technology that promotes the involvement of municipal solid waste (MSW) in the production of electric and thermal energy through gasification. The purpose of the study is to select the technology of gasification of RDF for the subsequent use of producer gas in the production of electric and thermal energy in the combined cycle at a CHP plant for the conditions of St. Petersburg city. During the research, the approximate composition and potential yield of RDF are evaluated. The possible types of gasifier, the type of gasifying agent and the amount of producer gas produced per unit of RDF are determined. The energy potential of the combined cycle per unit of RDF is identified. The potential output of RDF for the conditions of St. Petersburg is 311 thousand tons of standard fuel per year. The highest output of producer gas is obtained with steam-air blasting at atmospheric pressure – 2,994 m3/kg of RDF. At the same time, the highest energy potential of producer gas is obtained with steam-oxygen gasification. The achievable electric power of a combined cycle gas turbine (CCGT) plant using producer gas obtained by gasification of RDF in the conditions of St. Petersburg is estimated at 70 ÷ 150 MW. https://doi.org/10.18721/JEST.30203 662.76;662.6 gasification municipal solid waste RDF producer gas steam-gas cycle https://engtech.spbstu.ru/article/2024.128.4/ Kalyutik%2C-Treshchyov%2C-Kravchenko.pdf

RAR RUS 74-87 MOZZHEGOROVA Yulia ILINYKH Galina KOROTAEV Vladimir LIFE CYCLE ASSESSMENT OF A GAS TURBINE INSTALLATION IN THE RUSSIAN FEDERATION Gas turbine installations (GTIs) are widely used for the generation of electrical and thermal energy, mainly by burning gaseous fuels, i.e. natural gas. Of particular interest at present is the use of GTIs to burn hydrogen as part of the development of hydrogen energy technology. To assess the prospects of using GTIs in this way, it is necessary to understand the carbon footprint of GTI as part of the carbon footprint of the entire hydrogen life cycle. Life cycle assessment (LCA) is widely used to analyze the environmental performance of products and has many compelling advantages. This article provides an overview of the results from previously published LCA studies of GTIs, an analysis of the accepted system boundaries, functional units, and other aspects of LCA. The characteristics of the stages considered and the resources used in assessing the stages of the GTI life cycle are given, including an analysis of the amount of materials used in production and construction. The subject of the analysis was a set of GTIs located in Russia with a capacity of 16 MW. An assessment of greenhouse gas (GHG) emissions per MWh of electricity produced showed that at different stages of the life cycle of GTI, the total carbon footprint was 198.1–604.3 kg CO2-eq, of which more than 99% came from the GTI operation. The carbon footprint of GTI production stages was found to be significantly lower than other alternative power generation equipment. https://doi.org/10.18721/JEST.30204 504.75/620.9 gas turbine installation life cycle assessment carbon footprint hydrogen energy https://engtech.spbstu.ru/article/2024.128.5/ Mozzhegorova%2C-Ilinih%2C-Korotaev.pdf

RAR RUS 88-95 JSC "Atomproekt" Rogozhkin Vladimir Gorynin Vladimir z1dehy97@mail.wplus.net Zhitomirskiy Maxim ANALYTICAL SOLUTION OF THE GINZBURG–LANDAU EQUATIONS FOR THE ABRIKOSOV VORTEX IN SUPERCONDUCTORS WITH AN ARBITRARY VALUE OF THE PARAMETER æ > 0.707 Until now, there is no exact analytical solution to the equations of the Ginzburg–Landau theory of superconductivity for any value of the parameter æ > 0.707, satisfying the boundary conditions for the Abrikosov vortex and the magnetic flux quantization condition, as well as the classical asymptotics (for the value æ >> 1) of the London and Abrikosov formulas. In this regard, the goal of this computational and analytical research was to find a satisfactorily accurate analytical solution to the equation of the Ginzburg–Landau theory for the Abrikosov vortex in superconductors with an arbitrary value æ > 0.707. By analytically solving the equations of the phenomenological theory of Ginzburg–Landau superconductivity for a single Abrikosov vortex in a massive type II superconductor with an arbitrary value of the parameter æ, we found: magnetic field strength h(ρ), current density j(ρ) and order parameter f(ρ), satisfying the boundary conditions, the quantization condition and the classical asymptotics of London and Abrikosov. The first critical magnetic field Hc1 and the ratio of absolute values Hc1/Hc2 in superconductors with æ > 0.707 are determined. https://doi.org/10.18721/JEST.30205 669.2:538.945:543.123 superconductivity superconducting materials electromagnetic properties Ginzburg–Landau theory vortex theory https://engtech.spbstu.ru/article/2024.128.6/ Rogozhkin%2C-Gorinin%2C-Zhitomirskiy.pdf

RAR RUS 96-105 GRACHEVA Anna POLOZOV Igor BORISOV Artem Sufiiarov Vadim Popovich Anatoliy popovicha@mail.ru INVESTIGATION OF INTERMETALLIC TITANIUM ALLOY WITH COPPER ADDITION MADE BY BINDER JETTING WITH SUBSEQUENT SINTERING This article examines intermetallic titanium alloys based on TiAl, fabricated using binder jetting additive manufacturing technology with the addition of copper. TiAl-based alloy powder was mixed with copper powder in various concentrations (0, 2, 4, and 6 wt.%). Samples were fabricated from the powder mixture using binder jetting followed by sintering. The addition of copper significantly improved the density of the sintered samples (from 3.65 g/cm3 for TiAl samples without copper addition to 3.99 g/cm3 for TiAl samples with 2% copper). Metallographic analysis showed a reduction in porosity from 23% to 2.5% with the addition of 2% copper. An analysis of the microhardness of the samples and their tensile properties was also conducted. https://doi.org/10.18721/JEST.30206 621.762 binder jetting additive manufacturing intermetallic alloy titanium aluminide. https://engtech.spbstu.ru/article/2024.128.7/ Gracheva%2C-Polozov%2C-Borisov.pdf