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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">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">24650</article-id><article-id pub-id-type="doi">10.22363/2312-8143-2020-21-1-27-35</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Mechanical engineering and machine science</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Машиностроение и машиноведение</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">Modeling an effective method to utilize secondary energy resources of a combined cycle gas turbine based on the CCGT-420T</article-title><trans-title-group xml:lang="ru"><trans-title>Моделирование эффективного решения утилизации вторичных энергоресурсов ПГУ на примере ПГУ-420Т</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Antipov</surname><given-names>Yuri A.</given-names></name><name xml:lang="ru"><surname>Антипов</surname><given-names>Юрий Александрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Associate Professor at the Department of Mechanical and Instrumental Engineering of Engineering Academy of RUDN University, Ph.D.</p></bio><bio xml:lang="ru"><p>доцент департамента машиностроения и приборостроения Инженерной академии РУДН, кандидат технических наук, доцент</p></bio><email>rudn-tit@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shatalov</surname><given-names>Ivan K.</given-names></name><name xml:lang="ru"><surname>Шаталов</surname><given-names>Иван Касьянович</given-names></name></name-alternatives><bio xml:lang="en"><p>Professor at the Department of Mechanical and Instrumental Engineering of Engineering Academy of RUDN University, Ph.D.</p></bio><bio xml:lang="ru"><p>доцент департамента машиностроения и приборостроения Инженерной академии РУДН, кандидат технических наук, профессор, доцент</p></bio><email>rudn-tit@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shkarin</surname><given-names>Kirill V.</given-names></name><name xml:lang="ru"><surname>Шкарин</surname><given-names>Кирилл Владимирович</given-names></name></name-alternatives><bio xml:lang="en"><p>Assistant at the Department of Mechanical and Instrumental Engineering of Engineering Academy of RUDN University</p></bio><bio xml:lang="ru"><p>ассистент департамента машиностроения и приборостроения Инженерной академии РУДН</p></bio><email>rudn-tit@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Barybina</surname><given-names>Anna S.</given-names></name><name xml:lang="ru"><surname>Барыбина</surname><given-names>Анна Сергеевна</given-names></name></name-alternatives><bio xml:lang="en"><p>2nd year master student in the field of “Power Engineering” at the Department of Mechanical and Instrumental Engineering of Engineering Academy of RUDN University.</p></bio><bio xml:lang="ru"><p>студентка 2-го курса по направлению «Энергетическое машиностроение» департамента машиностроения и приборостроения Инженерной академии РУДН.</p></bio><email>rudn-tit@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ogneva</surname><given-names>Yana A.</given-names></name><name xml:lang="ru"><surname>Огнева</surname><given-names>Яна Александровна</given-names></name></name-alternatives><bio xml:lang="en"><p>2nd year master student in the field of “Power Engineering” at the Department of Mechanical and Instrumental Engineering of Engineering Academy of RUDN University.</p></bio><bio xml:lang="ru"><p>студентка 2-го курса по направлению «Энергетическое машиностроение» департамента машиностроения и приборостроения Инженерной академии РУДН.</p></bio><email>rudn-tit@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Morozov</surname><given-names>Pavel D.</given-names></name><name xml:lang="ru"><surname>Морозов</surname><given-names>Павел Дмитриевич</given-names></name></name-alternatives><bio xml:lang="en"><p>2nd year master student in the field of “Power Engineering” at the Department of Mechanical and Instrumental Engineering of Engineering Academy of RUDN University.</p></bio><bio xml:lang="ru"><p>студент 2-го курса по направлению «Энергетическое машиностроение» департамента машиностроения и приборостроения Инженерной академии РУДН.</p></bio><email>rudn-tit@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2020</year></pub-date><volume>21</volume><issue>1</issue><issue-title xml:lang="en">VOL 21, NO1 (2020)</issue-title><issue-title xml:lang="ru">ТОМ 21, №1 (2020)</issue-title><fpage>27</fpage><lpage>35</lpage><history><date date-type="received" iso-8601-date="2020-09-23"><day>23</day><month>09</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Antipov Y.A., Shatalov I.K., Shkarin K.V., Barybina A.S., Ogneva Y.A., Morozov P.D.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Антипов Ю.А., Шаталов И.К., Шкарин К.В., Барыбина А.С., Огнева Я.А., Морозов П.Д.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Antipov Y.A., Shatalov I.K., Shkarin K.V., Barybina A.S., Ogneva Y.A., Morozov P.D.</copyright-holder><copyright-holder xml:lang="ru">Антипов Ю.А., Шаталов И.К., Шкарин К.В., Барыбина А.С., Огнева Я.А., Морозов П.Д.</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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/24650">https://journals.rudn.ru/engineering-researches/article/view/24650</self-uri><abstract xml:lang="en"><p>Nowadays, improving the efficiency of power plants by utilizing secondary energy resources is gaining more attention in the energy sector. In this paper, the combined cycle gas turbine (CCGT-420T) was considered, where exhaust heat from the main and auxiliary equipment is utilized, and sent to a water supply system through a closed-circuit heat exchanger, as a result, the heat transferred ( Q ≈ 6.4 MW) is rejected into the environment through a cooling tower. Moreover, an effective modelling method for utilizing heat in a closed cycle, using a steam compressing heat pump unit (HPU) is proposed. In addition, a calculation of the effectiveness of utilizing secondary energy resources depending on the number of HPU stages. In addition, the calculation of the effectiveness of the use of secondary energy resources depending on the number of stages of HPU was carried out. Several options of the model were discussed in this work, such as, two-, three-, and four-stage HPU and the coefficient of performance was calculated. Moreover, the work of these compressors for each option of the model was discussed in this work. Finally, the economic benefits of using of a multi-stage HPU instead of a traditional one-stage HPU during the annual operation of the CCGT-420T was discussed.</p></abstract><trans-abstract xml:lang="ru"><p>В настоящее время большое внимание уделяется повышению эффективности работы энергетических установок путем использования вторичных энергоресурсов (ВЭР). В качестве базовой энергетической установки рассмотрен энергоблок ПГУ-420Т, где отвод тепла от основного и вспомогательного оборудования происходит в охладителях и направляется в систему циркуляционного водоснабжения через теплообменники замкнутого контура (ТЗК). В результате переданное тепло в количестве Q тзк ≈ 6,4 МВт утилизируется через градирню в окружающую среду. Предложено моделирование эффективного решения способа утилизации тепла замкнутого контура посредством применения многоступенчатой парокомпрессионной теплонасосной установки (ТНУ). Кроме того, проведен расчет эффективности использования ВЭР в зависимости от количества ступеней ТНУ. Рассматривались несколько вариантов модели, например с двух-, трех- и четырехступенчатой ТНУ, были получены коэффициенты преобразования. Более того, установлены необходимые мощности для каждого варианта модели. Наконец, обсуждены экономические преимущества использования многоступенчатой ТНУ вместо традиционной одноступенчатой в течение годовой эксплуатации энергоблока ПГУ-420Т.</p></trans-abstract><kwd-group xml:lang="en"><kwd>heat pump units</kwd><kwd>HPU</kwd><kwd>combined cycle gas turbine</kwd><kwd>CCGT</kwd><kwd>utilization</kwd><kwd>secondary energy resources</kwd><kwd>energy efficiency</kwd><kwd>modeling</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>теплонасосная установка</kwd><kwd>парогазотур- бинная установка</kwd><kwd>утилизация</kwd><kwd>вторичные энергоресурсы</kwd><kwd>энергетическая эффективность</kwd><kwd>моделирование</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">Istoriya parogazovogo tsikla v Rossii [History of the combined cycle in Russia]. 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