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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">ipolytech</journal-id><journal-title-group><journal-title xml:lang="ru">iPolytech Journal</journal-title><trans-title-group xml:lang="en"><trans-title>iPolytech Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2782-4004</issn><issn pub-type="epub">2782-6341</issn><publisher><publisher-name>Irkutsk National Research Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/1814-3520-2021-4-478-487</article-id><article-id custom-type="elpub" pub-id-type="custom">ipolytech-505</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</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POWER ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Исследование зависимости расхода топлива теплофикационной газотурбинной установки от изменения тепловой нагрузки потребителей регионов, имеющих различные климатические условия, с учетом определения конструктивных характеристик теплообменного оборудования подогрева сетевой воды</article-title><trans-title-group xml:lang="en"><trans-title>A study of the dependence between fuel consumption of a heat gas turbine and variation of heat loading of regional consumers having various climatic conditions taking into account determination of structural characteristics of heat exchanging equipment for grid water heating</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>Степанова</surname><given-names>Е. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Stepanova</surname><given-names>E. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Степанова Елена Леонидовна, кандидат технических наук, доцент, старший научный сотрудник Отдела теплосиловых систем</p><p>664033, г. Иркутск, ул. Лермонтова, 130</p></bio><bio xml:lang="en"><p>Elena L. Stepanova, Cand. Sci. (Eng.), Associate Professor, Senior Researcher of the Department of Heat Power Systems</p><p>130 Lermontov St., Irkutsk 664033</p></bio><email xlink:type="simple">elstep47@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>Жарков</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zharkov</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жарков Павел Валерьевич, кандидат технических наук, старший научный сотрудник Отдела теплосиловых систем</p><p>664033, г. Иркутск, ул. Лермонтова, 130</p></bio><bio xml:lang="en"><p>Pavel V. Zharkov, Cand. Sci. (Eng.), Senior Researcher of the Department of Heat Power Systems</p><p>130 Lermontov St., Irkutsk 664033</p></bio><email xlink:type="simple">pzharkov@isem.irk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт систем энергетики им. Л.А. Мелентьева СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Melentiev Energy Systems Institute SB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>01</day><month>09</month><year>2021</year></pub-date><volume>25</volume><issue>4</issue><fpage>478</fpage><lpage>487</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Степанова Е.Л., Жарков П.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Степанова Е.Л., Жарков П.В.</copyright-holder><copyright-holder xml:lang="en">Stepanova E.L., Zharkov P.V.</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://ipolytech.elpub.ru/jour/article/view/505">https://ipolytech.elpub.ru/jour/article/view/505</self-uri><abstract><p>Цель работы – исследовать величины напряжений в инструментальном материале составных концевых фрез для того, чтобы сравнить их с допустимыми напряжениями с позиций исключения разрушения фрез. Объектом исследования являются предельные величины напряжения в инструментальном материале разработанных составных концевых твердосплавных фрез, имеющих сопряженные между собой режущую часть и хвостовик. Режущая часть выполнена из инструментального твердого сплава, хвостовик – из конструкционной стали. Для определения напряжений использовано имитационное моделирование в программной среде ANSYS и Deform. Составляющие силы резания определены экспериментально. Принято, что чем меньше величины составляющих силы резания, тем меньше величины напряжений в инструментальном материале, и тем меньше возможность разрушения инструментального материала. Рассмотрено фрезерование труднообрабатываемой нержавеющей стали 12Х18Н10Т со скоростью резания 70 м/мин, с глубиной резания 1 мм и подачей 0,1 мм/зуб. Рассмотрен инструментальный материал ВК8 без покрытий и с разными покрытиями, которые способствуют снижению составляющих сил резания. Доказано, что составной концевой фрезой диаметром 16 мм и длиной 92 мм можно обрабатывать детали с той же точностью, с какой их обрабатывают монолитной (цельной) концевой твердосплавной фрезой. С увеличением длины составных фрез точность обработки снижается, но при длинах 123 мм и 180 мм они применимы для изготовления деталей, используемых в общем машиностроении. Таким образом, составные концевые фрезы могут конкурировать с монолитными фрезами по точности изготовления и периоду стойкости, чем ограничивают существующую область применения монолитных фрез. При этом стоимость составных фрез меньше монолитных на 10–60%.</p></abstract><trans-abstract xml:lang="en"><p>The aim was to optimize the dependence between fuel consumption and heat loading of regional consumers varied due to climatic conditions, taking into account the determination of structural characteristics of heat exchanging equipment for grid water heating in a heat gas turbine. A heat gas turbine comprising two fuel combustion chambers, a waste-heat boiler and a contact heat exchanger to heat makeup grid water was investigated. Scheme and parametric optimization studies were carried out using a mathematic model of a gas turbine created using a software and hardware system developed at the Department of Heat Power Systems of the Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences. Th turbine operating conditions differing in heat loads in four suggested operating regions were studied. It was found that an increase in fuel consumption in the second combustion chamber was 29%– 84% compared to that in the first combustion chamber. This rise was recorded when the turbine heat loading was increasing in the considered regions. Data analysis of the scheme and parametric optimization studies showed that, for operating conditions with a higher heat loading, it seems reasonable to ensure the maximum possible heating of makeup grid water as the loading rises. It is also recommended to slightly increase the heat surface area of the makeup grid water heater whose structural materials are less expensive than in a waste-heat boiler. It was shown that the suggested technical solution slightly increases specific capital investments while fully providing electrical and heat power to consumers. The obtained results can be used to select optimal technical solutions ensuring competitiveness in the operation of a heat gas turbine in regions with various climatic characteristics.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>теплофикационная газотурбинная установка</kwd><kwd>математическая модель теплоэнергетической установки</kwd><kwd>расход топлива</kwd><kwd>тепловая нагрузка</kwd><kwd>конструктивные характеристики</kwd><kwd>теплообменное оборудование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cogeneration gas turbine unit</kwd><kwd>mathematical model of a heat power plant</kwd><kwd>fuel consumption</kwd><kwd>heat load</kwd><kwd>design characteristics</kwd><kwd>heat exchange equipment</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках проекта государственного задания (№ FWEU-2021-0005, рег. № АААА-А21-121012190004-5) Программы фундаментальных исследований РФ на 2021–2025 гг.</funding-statement><funding-statement xml:lang="en">The research was carried out under the State Assignment Project (no. 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