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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">probener</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. ПРОБЛЕМЫ ЭНЕРГЕТИКИ</journal-title><trans-title-group xml:lang="en"><trans-title>Power engineering: research, equipment, technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-9903</issn><issn pub-type="epub">2658-5456</issn><publisher><publisher-name>Kazan State Power Engineering  University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30724/1998-9903-2022-24-1-86-98</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-2156</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЭНЕРГЕТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Численное исследование теплопроводности композитного теплоизоляционного материала с микрогранулами</article-title><trans-title-group xml:lang="en"><trans-title>Numerical investigation of the thermal conductivity of a composite heat-insulating material with microgranules</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соловьев</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Solovev</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Соловьев Сергей Анатольевич – кандидат физико-математических наук, доцент кафедры «Инженерная кибернетика» (ИК)</p></bio><bio xml:lang="en"><p>Sergei A. Solovev</p></bio><email xlink:type="simple">solovev.sa@kgeu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соловьева</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Soloveva</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Соловьева Ольга Викторовна – кандидат физико-математических наук, доцент кафедры «Энергообеспечение предприятий, строительство зданий и сооружений» (ЭОС)</p></bio><bio xml:lang="en"><p>Olga V. Soloveva</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ахметова</surname><given-names>И. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhmetova</surname><given-names>I. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ахметова Ирина Гареевна – доктор технических наук, заведующий кафедрой «Экономика и организация производства» (ЭОП)</p></bio><bio xml:lang="en"><p>Irina G. Akhmetova</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ваньков</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vankov</surname><given-names>Y. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ваньков Юрий Витальевич – доктор технических наук, заведующий кафедрой «Промышленная теплоэнергетика и системы теплоснабжения» (ПТЭ), Казанский государственный энергетический университет</p></bio><bio xml:lang="en"><p>Yury V. Vankov</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шакурова</surname><given-names>Р. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Shakurova</surname><given-names>R. Z.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шакурова Розалина Зуфаровна – аспирант кафедры «Промышленная теплоэнергетика и системы теплоснабжения» (ПТЭ)</p></bio><bio xml:lang="en"><p>Rozalina Z. Shakurova</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский государственный энергетический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Power Engineering University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>24</day><month>05</month><year>2022</year></pub-date><volume>24</volume><issue>1</issue><fpage>86</fpage><lpage>98</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Соловьев С.А., Соловьева О.В., Ахметова И.Г., Ваньков Ю.В., Шакурова Р.З., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Соловьев С.А., Соловьева О.В., Ахметова И.Г., Ваньков Ю.В., Шакурова Р.З.</copyright-holder><copyright-holder xml:lang="en">Solovev S.A., Soloveva O.V., Akhmetova I.G., Vankov Y.V., Shakurova R.Z.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.energyret.ru/jour/article/view/2156">https://www.energyret.ru/jour/article/view/2156</self-uri><abstract><sec><title>ЦЕЛЬ</title><p>ЦЕЛЬ. Рассмотреть проблемы, возникающие при создании композитного теплоизоляционного материала, включающего слой микросферических гранул. Провести численное моделирование композитного материала с различным объемным содержанием микросфер и различными вариантами образования пустот. Оценить влияние наличия зон, не занятых микрогранулами, на изоляционные свойства композитного материала. Определить влияние объемного содержания микросферических гранул на тепловой поток через композитный материал.</p></sec><sec><title>МЕТОДЫ</title><p>МЕТОДЫ. Численное моделирование проводилось путем создания моделей элементарных кубических ячеек композита с упаковкой из 27 микросфер в программном комплексе ANSYS Fluent 19.2. Оценка изоляционных свойств проводилась путем измерения коэффициента теплопроводности.</p></sec><sec><title>РЕЗУЛЬТАТЫ</title><p>РЕЗУЛЬТАТЫ. В статье исследовано влияние наличия зон, не занятых микросферическими гранулами, на теплоизоляционные свойства композитного материала. Построены модели элементарных кубических ячеек с различным объемным содержанием микрогранул. Построены модели элементарных ячеек с различными вариантами образования пустот, такими как удаление вертикального или горизонтального ряда гранул и уплотнение гранул по вертикали или горизонтали.</p></sec><sec><title>ЗАКЛЮЧЕНИЕ</title><p>ЗАКЛЮЧЕНИЕ. Удаление микрогранул оказывает значительное влияние на изоляционные свойства композита. Наименьший коэффициент теплопроводности получен для простой кубической ячейки при объемном содержании микрогранул φ = 40 %. Наличие пустот в материале способствует большим тепловым потерям, причем в случае вертикального сквозного канала тепловые потери больше, чем для горизонтального сквозного канала. В случае уплотнения сфер тепловые потери в зоне, не занятой микрогранулами, компенсируются уменьшением теплового потока в области с уплотнением сфер.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>THE PURPOSE</title><p>THE PURPOSE. To consider the problems that arise when creating a composite heatinsulating material, including a layer of microspherical granules. Numerical modeling of a composite material with different volume content of microspheres and different options for the formation of voids. Determination of the influence of the presence of zones not occupied by microgranules on the insulating properties of the composite material. Determination of the influence of the volume content of microspherical granules on the heat flux through the composite material.</p></sec><sec><title>METHODS</title><p>METHODS. Numerical simulation was carried out by creating models of elementary cubic cells of a composite with a package of 27 microspheres in the ANSYS Fluent 19.2 software package. The evaluation of the insulating properties was carried out by measuring the thermal conductivity coefficient.</p></sec><sec><title>RESULTS</title><p>RESULTS. The article investigates the influence of the presence of zones not occupied by microspherical granules on the thermal insulation properties of a composite material. Models of elementary cubic cells with different volume content of microgranules are constructed. Models of elementary cells are built with various options for the formation of voids, such as the removal of a vertical or horizontal row of granules and the compaction of granules vertically or horizontally.</p></sec><sec><title>CONCLUSION</title><p>CONCLUSION. The removal of microgranules has a significant effect on the insulating properties of the composite. The lowest thermal conductivity coefficient was obtained for a simple cubic cell with a volume content of microgranules φ = 40%. The presence of voids in the material contributes to large heat losses, and in the case of a vertical through channel, the heat losses are greater than for a horizontal through channel. In the case of densification of spheres, heat losses in the zone not occupied by microgranules are compensated by a decrease in the heat flux in the area with densification of spheres. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>теплоизоляция</kwd><kwd>композитный материал</kwd><kwd>сферические микрогранулы</kwd><kwd>теплопроводность</kwd><kwd>численное моделирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>thermal insulation</kwd><kwd>composite material</kwd><kwd>spherical microgranules</kwd><kwd>thermal conductivity</kwd><kwd>numerical simulation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Министерства науки и высшего образования Российской Федерации в рамках государственного задания № 075-03-2021-175/3 от 30.09.2021 г.</funding-statement><funding-statement xml:lang="en">This research was funded by Ministry of Science and Higher Education of the Russian Federation within the framework of the state assignment № 075-03-2021-175/3 from 30.09.2021</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Гапоненко С. 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