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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">10.30724/1998-9903-2025-27-5-153-167</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-3572</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>ТЕОРЕТИЧЕСКАЯ И ПРИКЛАДНАЯ ТЕПЛОТЕХНИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THEORETICAL AND APPLIED HEAT ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Численное и экспериментальное исследование теплопереноса от цилиндрической трубы в грунте тепличного хозяйства</article-title><trans-title-group xml:lang="en"><trans-title>Numerical and experimental study of heat transfer from a cylindrical pipe in greenhouse soil</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9743-7107</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Уткин</surname><given-names>М. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Utkin</surname><given-names>M. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Уткин Максим Олегович – аспирант</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Maksim O. Utkin</p><p>Kazan</p></bio><email xlink:type="simple">209maks@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8979-4457</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дмитриев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Dmitriev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитриев Андрей Владимирович – д-р. техн. наук, профессор, зав. кафедрой «Автоматизация технологических процессов и производств» (АТПП) </p><p>г. Казань</p></bio><bio xml:lang="en"><p>Andrey V. Dmitriev</p><p>Kazan</p></bio><email xlink:type="simple">ieremiada@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1380-4433</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зинуров</surname><given-names>В. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Zinurov</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зинуров Вадим Эдуардович – канд. техн. наук, и.о. зав. кафедрой «Инженерная графика» (ИГ) </p><p>г. Казань</p></bio><bio xml:lang="en"><p>Vadim E. Zinurov</p><p>Kazan</p></bio><email xlink:type="simple">vadd_93@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский государственный энергетический университет (КГЭУ)</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>2025</year></pub-date><pub-date pub-type="epub"><day>19</day><month>11</month><year>2025</year></pub-date><volume>27</volume><issue>5</issue><fpage>153</fpage><lpage>167</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Уткин М.О., Дмитриев А.В., Зинуров В.Э., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Уткин М.О., Дмитриев А.В., Зинуров В.Э.</copyright-holder><copyright-holder xml:lang="en">Utkin M.O., Dmitriev A.V., Zinurov V.E.</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/3572">https://www.energyret.ru/jour/article/view/3572</self-uri><abstract><p>АКТУАЛЬНОСТЬ. Отопление тепличного пространства в зимнее время было и остается одной из самых энергоемких статей затрат при эксплуатации тепличного хозяйства. Комбинирование возобновляемых источников энергии с высокотемпературными тепловыми накопителями позволяет сгладить дисбаланс генерации и потребления, однако данный подход требует верифицированных моделей теплообмена грунта для надежного проектирования подземных систем обогрева. ЦЕЛЬ. Численное моделирование и верификация процессов теплопередачи от трубы, размещенной в грунте, с учетом его влажности, для последующего применения в системах локального обогрева тепличного грунта. МЕТОДЫ. Проведены две серии лабораторных опытов: с высушенным (влажность менее 10%) и увлажненным (влажность около 45%) суглинком. Температуры регистрировались 20 датчиками DS18B20 и тепловизором UTi260B. Создана двумерная модель, построена сеточная модель. Выполнены нестационарные численные расчеты в ANSYS Fluent. В программе решалось уравнение нестационарной теплопроводности методом конечных объемов, учтены реальные теплофизические свойства грунта. РЕЗУЛЬТАТЫ. Средняя относительная погрешность между расчетными и экспериментальными температурами составила менее 6% для высушенного и около 4% для увлажненного грунта, что подтверждает адекватность модели. Увлажненный грунт прогревается на 15-20% быстрее и достигает на 2-3ºC более высоких температур в зоне 2-4 см, что связано с уменьшением термического сопротивления насыщенной поровой структуры. Термограммы показали, что эффективная ширина прогрева одиночной трубы ограничена 1-2 см, ввиду этого необходимо использовать пучок труб или змеевик для равномерного воздействия на корнеобитаемый слой. ЗАКЛЮЧЕНИЕ. Верифицированная модель служит инструментом для оптимизации геометрии трубного контура с учетом влагосодержания почвы.</p></abstract><trans-abstract xml:lang="en"><p>THE RELEVANCE. Heating of greenhouse spaces during the winter season has been and remains one of the most energy-intensive cost items in greenhouse operation. The integration of renewable energy sources with high-temperature thermal storage systems helps to mitigate the imbalance between energy generation and consumption; however, this approach requires validated ground heat transfer models for the reliable design of subsurface heating systems. THE PURPOSE. To perform numerical modeling and experimental validation of heat transfer from a buried pipe, considering soil moisture content, for subsequent application in localized greenhouse soil heating systems. METHODS. Two series of laboratory experiments were conducted using dried (moisture &lt; 10%) and moistened (moisture ≈ 45%) loamy soil. Soil temperature was monitored using 20 DS18B20 sensors and a UTi260B thermal imager. A two-dimensional computational domain was developed, and a mesh grid was constructed. Transient numerical simulations were performed in ANSYS Fluent. The unsteady-state heat conduction equation was solved using the finite volume method, incorporating actual thermophysical properties of the soil. RESULTS. The average relative deviation between simulated and experimental temperatures was below 6% for dried soil and around 4% for moistened soil, confirming model accuracy. Moistened soil exhibited 15-20% faster heating and achieved 2-3 °C higher temperatures in the 2-4 cm depth range due to reduced thermal resistance in the saturated pore structure. Thermographic imaging showed that the effective heating width of a single pipe was limited to 1-2 cm, indicating the need for a pipe bundle or coil arrangement to ensure uniform heating of the root zone. CONCLUSION. The validated model serves as a tool for optimizing the geometry of subsurface pipe layouts based on soil moisture content.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>тепловой накопитель энергии</kwd><kwd>тепловые трубы</kwd><kwd>тепличное хозяйство</kwd><kwd>теплоперенос в грунте</kwd><kwd>влажность почвы</kwd><kwd>верификация эксперимента</kwd><kwd>подземный обогрев.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>thermal energy storage</kwd><kwd>heat pipes</kwd><kwd>greenhouse heating</kwd><kwd>soil heat transfer</kwd><kwd>soil moisture</kwd><kwd>experimental validation</kwd><kwd>subsurface heating</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">работа выполнена за счет гранта Российского научного фонда № 24- 29-20061.</funding-statement><funding-statement xml:lang="en">the study was carried out with the financial support of the grant of the Russian Science Foundation No. 24-29-20061.</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">Soussi A., Zero E., Ouammi A., et al. 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