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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">ntv</journal-id><journal-title-group><journal-title xml:lang="ru">Научно-технический вестник информационных технологий, механики и оптики</journal-title><trans-title-group xml:lang="en"><trans-title>Scientific and Technical Journal of Information Technologies, Mechanics and Optics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-1494</issn><issn pub-type="epub">2500-0373</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2226-1494-2023-23-2-422-429</article-id><article-id custom-type="elpub" pub-id-type="custom">ntv-388</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>МАТЕМАТИЧЕСКОЕ И КОМПЬЮТЕРНОЕ МОДЕЛИРОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MODELING AND SIMULATION</subject></subj-group></article-categories><title-group><article-title>Моделирование тепло-гидродинамических процессов в испарителях низкотемпературных систем с внутриканальным кипением хладагентов</article-title><trans-title-group xml:lang="en"><trans-title>Modeling of heat-hydrodynamic processes in evaporators of low-temperature systems with intrachannel boiling of refrigerants</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1896-2545</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Апицына</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Apitsyna</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Апицына Ольга Сергеевна — ассистентСанкт-Петербург, 197101</p><p>sc 57398309300</p></bio><bio xml:lang="en"><p>Olga S. Apitsyna — Assistant</p><p>Saint Petersburg, 197101</p><p>sc 57398309300</p></bio><email xlink:type="simple">apitsyna.olga@yandex.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/0000-0001-8845-0513</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малышев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Malyshev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Малышев Александр Александрович — кандидат технических наук, доцент, доцент</p><p>Санкт-Петербург, 197101sc 57213486021</p></bio><bio xml:lang="en"><p>Aleksandr A. Malyshev — PhD, Associate Professor, Associate Professor</p><p>Saint Petersburg, 197101</p><p>sc 57213486021</p></bio><email xlink:type="simple">malyshev46@list.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/0000-0003-0677-6320</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зайцев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaitsev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зайцев Андрей Викторович — кандидат технических наук, доцент, доцент</p><p>Санкт-Петербург, 197101</p><p>sc 57203587690</p></bio><bio xml:lang="en"><p>Andrei V. Zaitsev — PhD, Associate Professor, Associate ProfessorISaint Petersburg, 197101sc 57203587690</p></bio><email xlink:type="simple">zai_@inbox.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/0000-0002-1513-4672</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малинина</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Malinina</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Малинина Ольга Сергеевна — кандидат технических наук, доцент, доцент</p><p>Санкт-Петербург, 197101</p><p>sc 57203591145</p></bio><bio xml:lang="en"><p>Olga S. Malinina — PhD, Associate Professor, Associate Professor,Saint Petersburg, 197101sc 57203591145</p></bio><email xlink:type="simple">holodhol@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет ИТМО</institution><country>Россия</country></aff><aff xml:lang="en"><institution>ITMO University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>21</day><month>12</month><year>2024</year></pub-date><volume>23</volume><issue>2</issue><fpage>422</fpage><lpage>429</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Апицына О.С., Малышев А.А., Зайцев А.В., Малинина О.С., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Апицына О.С., Малышев А.А., Зайцев А.В., Малинина О.С.</copyright-holder><copyright-holder xml:lang="en">Apitsyna O.S., Malyshev A.A., Zaitsev A.V., Malinina O.S.</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://ntv.elpub.ru/jour/article/view/388">https://ntv.elpub.ru/jour/article/view/388</self-uri><abstract><p>Предмет исследования. Внедрение новых типов теплообменных аппаратов с фазовыми переходами и решение задач оптимизации конструктивных и эксплуатационных характеристик являются приоритетными в рамках программы энергосбережения. Известные методики расчета тепло-гидродинамических параметров потока холодильных агентов часто не учитывают специфику процессов кипения при отрицательных температурах, а также в каналах малого проходного сечения. В данной работе представлены результаты моделирования теплообмена при кипении хладагентов в каналах испарителей теплохладоэнергетических комплексов с учетом истинных параметров потока. Метод. Предложенная математическая модель кипения рабочего вещества в каналах различной формы основана на истинных параметрах потока, подразумевающих знание площадей сечений канала, занятых каждой из фаз. Значение истинного объемного паросодержания обеспечивает наиболее корректное моделирование двухфазных потоков в широком диапазоне режимных и геометрических параметров. В работе использованы уравнения материального и теплового баланса в сочетании с уравнением теплопередачи от окружающей среды к кипящему хладагенту. В качестве эмпирической составляющей применена карта режимов течения. Основные результаты. Разработана программа расчета предложенной системы уравнений, которая на каждом временном шаге решается итеративно с применением метода конечных объемов. Выполнено сопоставление результатов расчета с экспериментальными данными на моделях испарителей с каналами круглого и прямоугольного сечений с внутриканальным кипением холодильных агентов при положительной и отрицательной температурах насыщения. Показано, что погрешность расчетов не превышает 10 % для круглого и 20 % для прямоугольного проходного сечения. Результаты верификации показали возможность применения модели в рамках инженерных расчетов. Практическая значимость. Представленная математическая модель может быть положена в основу программ расчета существующих испарителей и при создании новых типов теплообменных аппаратов с внутритрубным кипением рабочего вещества. Рассмотренный метод позволяет оптимизировать как геометрические, так и тепло-гидродинамические параметры.</p></abstract><trans-abstract xml:lang="en"><p>The introduction of new types of heat exchangers with phase transitions and the solution of problems of optimizing the design and operational characteristics are a priority within the framework of the energy saving program. Known methods for calculating the heat-hydrodynamic parameters of the flow of refrigerants often do not take into account the specifics of boiling processes at low temperatures as well as in channels with a small flow area. This paper presents the results of modeling heat transfer during the boiling of refrigerants in the channels of evaporators of heat and cold energy complexes, taking into account the true flow parameters. The proposed mathematical model of the boiling of the working substance in channels of various shapes is based on the true flow parameters which imply knowledge of the channel cross-sectional areas occupied by each of the phases. The value of the true volumetric steam content provides the most correct modeling of two-phase flows in a wide range of regime and geometric parameters. The paper uses the equations of material and heat balance in combination with the equation of heat transfer from the environment to the boiling refrigerant. The map of flow regimes is used as an empirical component. A program has been developed for calculating the proposed system of equations which is solved iteratively at each time step using the finite volume method. Comparison of calculation results with experimental data on models of round and rectangular channels with intracanal boiling of refrigerants at positive and negative saturation temperatures is performed. It is shown that the calculation error does not exceed 10 % for a round and 20 % for a rectangular flow section. The verification results showed the possibility of using the model in the framework of engineering calculations. The proposed mathematical model can be used as the basis for the calculation programs for existing evaporators and for the creation of new types of heat exchangers with in-tube boiling of the working substance. The proposed method allows optimizing both geometric and thermal-hydrodynamic parameters.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>теплообмен</kwd><kwd>внутриканальное кипение</kwd><kwd>моделирование теплообмена</kwd><kwd>истинное объемное паросодержание</kwd><kwd>уравнение материального баланса</kwd><kwd>уравнение теплового баланса</kwd><kwd>уравнение теплопередачи</kwd></kwd-group><kwd-group xml:lang="en"><kwd>heat transfer</kwd><kwd>intrachannel boiling</kwd><kwd>heat transfer modeling</kwd><kwd>true volumetric vapor content</kwd><kwd>material balance equation</kwd><kwd>heat balance equation</kwd><kwd>heat transfer equation</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">Мезенцева Н.Н., Мезенцев И.В., Мухин В.А. Теплообмен при пузырьковом кипении неазеотропных смесей в горизонтальных трубах // Вестник Новосибирского государственного университета. 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