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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Vestnik of Samara State Technical University. Technical Sciences Series</journal-id><journal-title-group><journal-title xml:lang="en">Vestnik of Samara State Technical University. Technical Sciences Series</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Самарского государственного технического университета. Серия «Технические науки»</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1991-8542</issn><issn publication-format="electronic">2712-8938</issn><publisher><publisher-name xml:lang="en">Samara State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">586449</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Information Technology and Communications</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Информационные технологии и коммуникации</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Optimization of combined thermal circuits gas turbine expander power plants</article-title><trans-title-group xml:lang="ru"><trans-title>Оптимизация тепловых схем комбинированных газотурбодетандерных энергетических установок</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gulina</surname><given-names>Svetlana A.</given-names></name><name xml:lang="ru"><surname>Гулина</surname><given-names>Светлана Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>(Ph.D. (Techn.)), Associate Professor</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры «Трубопроводный транспорт»</p></bio><email>kr_oeg@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sheludko</surname><given-names>Leonid P.</given-names></name><name xml:lang="ru"><surname>Шелудько</surname><given-names>Леонид Павлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>(Ph.D. (Techn.)), Associate Professor</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры «Управление и системный анализ теплоэнергетических и социотехнических комплексов»</p></bio><email>chel_lp@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Samara State Technical University</institution></aff><aff><institution xml:lang="ru">Самарский государственный технический университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-12-20" publication-format="electronic"><day>20</day><month>12</month><year>2023</year></pub-date><volume>31</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>22</fpage><lpage>42</lpage><history><date date-type="received" iso-8601-date="2023-09-20"><day>20</day><month>09</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-12-12"><day>12</day><month>12</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Gulina S.A., Sheludko L.P.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Гулина С.А., Шелудько Л.П.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Gulina S.A., Sheludko L.P.</copyright-holder><copyright-holder xml:lang="ru">Гулина С.А., Шелудько Л.П.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/1991-8542/article/view/586449">https://journals.eco-vector.com/1991-8542/article/view/586449</self-uri><abstract xml:lang="en"><p>In this paper, thermal schemes are proposed and the principle of operation of combined power plants of a new type for a thermal power plant is given. Thermodynamic analysis of parameters of thermal circuits of combined power gas turbine expander plants was carried out depending on the outside air temperature, electric and thermal loads of the thermal power plant, as well as the flow rate of natural gas through the gas distribution point consumed by the thermal power plant. Based on the results of the calculation, optimization of the power plant cycle parameters was carried out, providing the specified electric power and efficiency of the gas power turbine. It has been found that its electric power and efficiency depend on the flow rate of natural gas supplied to the thermal power plant in different months of the year and the corresponding air temperatures. The most efficient combined plant is a system in which turbo expanders are connected to the turbocharger shaft of a typical GTU or complementary to a typical GTU by a turbo expander compressor unit. The use of a new type of combined gas turbine expander power plants seems to be the most effective solution for increasing the generation of electric energy and increasing the thermal efficiency of thermal power plants.</p></abstract><trans-abstract xml:lang="ru"><p>Предложен новый тип комбинированных газотурбодетандерных энергетических установок как эффективное системное решение для увеличения выработки электрической энергии и повышения тепловой экономичности ТЭЦ. Разработаны тепловые схемы и приведен принцип работы комбинированных энергетических установок нового типа для тепловой электростанции. Проведен термодинамический анализ параметров тепловых схем комбинированных энергетических газотурбодетандерных установок в зависимости от температуры наружного воздуха, электрической и тепловой нагрузок ТЭЦ, а также расхода природного газа, потребляемого ТЭЦ, через газораспределительный пункт. По результатам расчета проведена оптимизация параметров цикла энергетических установок, обеспечивающая заданную электрическую мощность и КПД газовой энергетической турбины. Установлено, что ее электрическая мощность и КПД зависят от величины расхода природного газа, подаваемого на ТЭЦ в разные месяцы года, и соответствующих температур воздуха. Наиболее эффективная комбинированная установка представляет собой систему, в которой турбодетандеры связаны с турбокомпрессорным валом типовой ГТУ или дополняющей типовую ГТУ турбодетандерным компрессорным блоком.</p></trans-abstract><kwd-group xml:lang="en"><kwd>thermal power station</kwd><kwd>compressor station gas turbine plant</kwd><kwd>turbo expander</kwd><kwd>natural gas</kwd><kwd>gas distribution point</kwd><kwd>gas turbine power station</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>тепловая электростанция</kwd><kwd>компрессорная станция</kwd><kwd>газотурбинная установка</kwd><kwd>турбодетандер</kwd><kwd>природный газ</kwd><kwd>газораспределительный пункт</kwd><kwd>газотурбинная электростанция</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Strebkov A.N., Osipov A.V., Zhyvronsky S.K. 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