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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">vestift</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-технических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physical-technical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8358</issn><issn pub-type="epub">2524-244X</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8358-2023-68-2-137-148</article-id><article-id custom-type="elpub" pub-id-type="custom">vestift-798</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, ТЕПЛО- И МАССООБМЕН</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING, HEAT AND MASS TRANSFER</subject></subj-group></article-categories><title-group><article-title>Теплообмен во влажных капиллярно-пористых телах различного состава при конвективном нагревании в паровоздушных средах</article-title><trans-title-group xml:lang="en"><trans-title>Heat exchange in wet capillary-porous bodies of various compositions during convective heating in vapor-air media</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>Смагина</surname><given-names>М. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Smagina</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Смагина Марина Николаевна – магистр технических наук, специалист по работе с магистрантами</p><p>пр. Шмидта, 3, 212027, Могилев, Республика Беларусь</p></bio><bio xml:lang="en"><p>Marina N. Smagina – Master of Sci. (Engineering), Specialist in Working with Undergraduates</p><p>3, Schmidt Ave., 212027, Mogilev, Republic of Belarus</p></bio><email xlink:type="simple">m.n.smagina@mail.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>Смагин</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Smagin</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Смагин Денис Алексеевич – кандидат технических наук, доцент</p><p>пр. Шмидта, 3, 212027, Могилев, Республика Беларусь</p></bio><bio xml:lang="en"><p>Denis A. Smagin – Cand. Sci. (Engineering), Assistant Professor</p><p>3, Schmidt Ave., 212027, Mogilev, Republic of Belarus</p></bio><email xlink:type="simple">denis_smagin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет пищевых и химических технологий</institution></aff><aff xml:lang="en"><institution>Belarusian State University of Food and Chemical Technologies</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>09</day><month>07</month><year>2023</year></pub-date><volume>68</volume><issue>2</issue><fpage>137</fpage><lpage>148</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Смагина М.Н., Смагин Д.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Смагина М.Н., Смагин Д.А.</copyright-holder><copyright-holder xml:lang="en">Smagina M.N., Smagin D.A.</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://vestift.belnauka.by/jour/article/view/798">https://vestift.belnauka.by/jour/article/view/798</self-uri><abstract><p>Приведены результаты исследования процесса нагревания влажных капиллярно-пористых тел различного состава (мясных изделий) при термообработке в сухом воздухе и паровоздушной смеси в условиях вынужденной циркуляции греющей среды. Исследования проводились на влажном обезжиренном образце (мясо куриного филе) и маловлажном жирном образце (лопаточная часть свинины), сформованных в виде цилиндра и пластины. Показано, что процесс нагревания мясных изделий различного состава подчиняется закономерностям теории нестационарной теплопроводности однородных тел, несмотря на многообразие сопутствующих фазовых и физико-химических преобразований. Установлено, что регулярный режим нестационарной теплопроводности наступает при Fo ≥ 0,2 для всех исследуемых вариантов. На основании обработки и анализа экспериментальных данных получены критериальные уравнения вида Θ = f(Fo,Bi) для центрального слоя исследуемых изделий в диапазоне температур 160–240 °С. Установлено, что особенности нагревания мясных изделий в среде паровоздушной смеси приводят к меньшим значениям коэффициентов μ1 и N(Bi) при регулярном режиме по сравнению с нагреванием в сухом воздухе. При этом для маловлажных жирных образцов характерны более низкие значения μ1 и N(Bi) по сравнению с влажными обезжиренными. В результате сравнения с табличными данными для твердых тел показано, что экспериментальные коэффициенты μ1 и N(Bi) характеризуются меньшими значениями для всех исследуемых вариантов. Установлено, что характер изменения N(Bi) и μ1 для твердых тел и изучаемых изделий противоположен, то есть при росте числа Bi для твердых тел характерно увеличение N(Bi) и μ1, в то время как для исследуемых изделий характерно их уменьшение. Практическая значимость исследований состоит в повышении качественных характеристик мясных рубленых изделий и оптимизации оперативного производственного планирования за счет применения методики прогнозного расчета продолжительности тепловых операций.</p></abstract><trans-abstract xml:lang="en"><p>The results of the study of the heating process of wet capillary-porous bodies of various compositions (meat products) during heat treatment in dry air and steam-air mixture under conditions of forced circulation of the heating medium are presented. The studies were carried out on a moist fat-free sample (chicken fillet meat) and a low-moisture fat sample (pork shoulder blade) formed in the form of a cylinder and a plate. It is shown that the process of heating of meat products of various compositions obeys the laws of the theory of unsteady thermal conductivity of homogeneous bodies, despite the variety of accompanying phase and physico-chemical transformations. It is established that the regular mode of non-stationary thermal conductivity occurs at Fo ≥ 0.2 for all the studied variants. Based on the processing and analysis of experimental data, criterion equations of the form Θ = f(Fo,Bi) for the central layer of the studied products in the temperature range 160–240 °C were obtained. It has been established that the peculiarities of heating of meat products in a vapor-air mixture environment lead to lower values of the coefficients μ1 and N(Bi) at regular operation compared with heating in dry air. It was found that low-moisture fatty samples are characterized by lower values of μ1 and N(Bi) in comparison with moist fat-free ones. As a result of comparison with tabular data for solids, it is shown that the experimental coefficients μ1 and N(Bi) are characterized by lower values for all the studied variants. It is established that the nature of the change in N(Bi) and μ1 for solids and the studied products is opposite, i.e., with an increase in the number of Bi, an increase in N(Bi) and μ1 is characteristic for solids, while their decrease is characteristic for the studied products. The practical significance of the research consists in improving the quality characteristics of minced meat products and optimizing operational production planning through the use of the methodology of predictive calculation of the duration of thermal operations.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>теплообмен</kwd><kwd>сухой воздух</kwd><kwd>паровоздушная смесь</kwd><kwd>влажное тело</kwd><kwd>нестационарная теплопроводность</kwd><kwd>регулярный режим</kwd><kwd>безразмерная температура</kwd><kwd>число Био</kwd><kwd>число Фурье</kwd></kwd-group><kwd-group xml:lang="en"><kwd>heat exchange</kwd><kwd>dry air</kwd><kwd>steam-air mixture</kwd><kwd>wet body</kwd><kwd>non-stationary thermal conductivity</kwd><kwd>regular mode</kwd><kwd>dimensionless temperature</kwd><kwd>the Bio criterion</kwd><kwd>the Fourier criterion</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Николаев, Н. 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