Персона: Стручалин, Павел Геннадьевич
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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- ПубликацияТолько метаданныеSolar steam generation enabled by iron oxide nanoparticles: Prototype experiments and theoretical model(2020) Thon, H.; Kosinski, P.; Struchalin, P. G.; Kuzmenkov, D. M.; Kutsenko, K. V.; Balakin, B. V.; Стручалин, Павел Геннадьевич; Кузьменков, Дмитрий Михайлович; Куценко, Кирилл Владленович© 2020Photo-thermal evaporation of nanofluids has potential applications in solar desalination, micro-CHP (combined heat and power) and domestic off-grid disinfection. In this research, we reproduced the process experimentally using 110-nm iron oxide particles dispersed in water. At an initial lab-scale stage, under the artificial radiation of 6.9 suns, we observed that the boiling nanofluid destabilizes to a suspension of 6µm agglomerates of nanoparticles and that up to 30% of the particles escape the system with the steam. At the prototype stage, we boiled the fluid in a solar concentrator producing 35 g/min steam with an efficiency of around 60%, which is sufficient to drive a small turbine. The optimum concentration of the nanoparticles was 3 wt%. To supplement the experiments, we developed a simplified model for engineering calculations of the solar steam generation rate. The model corresponds well to the experiments deviating by only 8%.
- ПубликацияТолько метаданныеElective course “nuclear physics” for high school students – Synthesis of traditional textbook with the modern computer tools(2019) Belaga, V.; Dolgy, E.; Klygina, K.; Kochnev, P.; Delov, M.; Kondakov, V.; Struchalin, P.; Tikhomirov, G.; Делов, Максим Игоревич; Стручалин, Павел Геннадьевич; Тихомиров, Георгий ВалентиновичCopyright © 2019 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0).An elective course “Nuclear Physics” was developed for high school students, including a traditional textbook, a computer application and various interactive educational materials and 3D models available on mobile devices using QR codes. The main idea of the course can be formulated as “From Nuclear Physics to Nuclear Technologies”. The elective course includes not only basic laws of nuclear physics, but also the application of these laws in nuclear astrophysics, in the synthesis of new elements, nuclear energy, nuclear medicine, ecology and radiobiology. Each chapter in the textbook provides links to additional digital materials: video lectures, examples of problem solving and additional materials for advanced study. At the end of the textbook, you can also find the references to a virtual practicum on nuclear physics, final tests, and approximate research and project works. The textbook pays special attention to the modern achievements of nuclear physics. It contains information of modern international experiments, conducted at JINR and other international scientific centers.
- ПубликацияТолько метаданныеSolar steam generation in fine dispersions of graphite particles(2020) Alyaev, S.; He, Y.; Kuzmenkov, D. M.; Delov, M. I.; Zeynalyan, K.; Struchalin, P. G.; Kutsenko, K. V.; B. V. Balakin.; Кузьменков, Дмитрий Михайлович; Делов, Максим Игоревич; Стручалин, Павел Геннадьевич; Куценко, Кирилл Владленович© 2020 Elsevier LtdThe direct photothermal boiling in suspensions of nano- and microscopic particles finds multiple applications in concentrated solar power: turbine-based combined heat and power (CHP) generation, solar distillation, energy storage, and chemical synthesis. However, the most promising application is solar desalination. There have been multiple studies aimed at the evaporation of suspensions using simulated solar light, but there is neither a theory describing the process nor a well-documented prototype study. This article aims at the development of an experiment and a theory, that describe the photothermal boiling in aqueous suspensions of graphite. We develop a laboratory scale steam-fluid loop with continuous condensation that recycles the water back to the process. We clarify how the concentration and incident radiant heat influence the steam generation. The optimum concentration of graphite particles - 1 wt% - was found experimentally at 17.4 suns. We studied the granulometry of the suspension and dynamics of steam bubbles. We document how the particle size distribution and bubbles evolve in boiling suspension. The theoretical description of the process is based on a heat balance analysis for an individual steam bubble. The developed model is validated against three independent experimental datasets, exhibiting accuracy with the lowest average discrepancy of 10%.
- ПубликацияТолько метаданныеComparative analysis of photothermal boiling of water enhanced by nano- and micro-particles of carbon black(2021) Ulset, E. T.; Kosinski, P.; He, Y.; Struchalin, P. G.; Karazhanov, S. Z.; Balakin, B. V.; Стручалин, Павел Геннадьевич; Каражанов, Смагул Жангабергенович© 2020 Elsevier B.V.The paper describes the effect of sodium dodecyl sulfate (SDS) on the steam generation during photothermal boiling of carbon nanofluids. The considered process finds promising applications for e.g. solar desalination where SDS may boost steam generation. Our study was carried out in a lab system boiling aqueous suspensions of carbon by means of artificial thermal radiation. The experiments demonstrate that the newly-produced nanofluids turn into suspension when no SDS is present in the fluid. The agglomeration of nanoparticles reduces the stability of the system yet degrades the steam generation by no more than 8.2%. The optimum particle concentration was about 2% wt. independently of whether SDS was present in samples. The steam was superheated by up to 12 K when using the surfactant which was 5–7 K higher than without SDS. The experimental data was supported by a theoretical analysis.
- ПубликацияТолько метаданныеPerformance of a tubular direct absorption solar collector with a carbon-based nanofluid(2021) Nikolaev, O. V.; Vologzhannikova, A. A.; Shevelyova, M. P.; Gorbacheva, O. S.; Struchalin, P. G.; Yunin, V. S.; Kutsenko, K. V.; Balakin, B. V.; Стручалин, Павел Геннадьевич; Куценко, Кирилл Владленович© 2021 Elsevier LtdDirect absorption solar collectors (DASC) with nanofluid represent a new direction in solar thermal technology that is simpler yet more efficient than conventional equipment. In this work, we report details of performance for a custom tubular DASC with a carbon-based nanofluid. The collector was tested experimentally following a standard procedure and using a multiphase CFD-model of the device. The experiments were carried out in a range of flow rates 2. 10 l/min, nanoparticle concentrations 0.0015. 0.082%wt., temperature differences (up to 29.3 degrees), and radiant heat fluxes. We found that, at a particle concentration of 0.01%, the collector demonstrated the average thermal efficiency of 80%. For the comparable temperature differences, the efficiency of DASC was 5.8. 37.9% higher than a collector with similar geometry but a surface absorption of light energy. The CFD-model, validated against our experiments, depicts flow patterns in the DASC focusing on nanoparticles’ deposition. Less than 5% of particles deposit under local flow restrictions at flows above 6 l/min. The deposition patterns from the CFD-model correlate to the experimental observations.
- ПубликацияОткрытый доступТеплофизические характеристики ТВЭЛов с плотным топливом реакторов с тяжелым жидкометаллическим теплоносителем(2019) Стручалин, П. Г.; Стручалин, Павел Геннадьевич; Харитонов, В. С.
- ПубликацияТолько метаданныеInfluence of Particle Size Distribution on the Optical Properties of Fine-Dispersed Suspensions(2022) Kuzmenkov, D.; Struchalin, P.; Litvintsova, Y.; Delov, M.; Skrytnyy, V.; Kutsenko, K.; Кузьменков, Дмитрий Михайлович; Стручалин, Павел Геннадьевич; Делов, Максим Игоревич; Скрытный, Владимир Ильич; Куценко, Кирилл ВладленовичNanofluids have great potential for solar energy harvesting due to their suitable optical and thermophysical properties. One of the promising applications of nanofluids is utilization in solar collectors with the direct absorption of light (DASC). The design of a DASC requires detailed knowledge of the optical properties of nanofluids, which can be significantly affected by the particle size distribution. The paper presents the method to take into account the particle size distribution when calculating nanofluid extinction spectra. To validate the proposed model, the particle size distribution and spectral absorbance were measured for aqueous suspension with multi-walled graphite nanotubes; the minimum size of primary nanoparticles was 49 nm. The proposed model is compared with experiments demonstrating the concentration averaged and maximum discrepancies of 6.6% and 32.2% against 12.6% and 77.7% for a model assuming a monosized suspension.