Разработка каскадной тепловой схемы турбоустановки на низкокипящих рабочих телах для сельской энергетики
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Дата
2017
ORCID
DOI
10.20998/2078-774X.2017.10.02
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
НТУ "ХПИ"
Анотація
Предложено совершенствование существующей тепловой схемы малой когенерационной турбоустановки электрической мощностью ~80 кВт путем подключения второго каскада. Приведены результаты расчетных исследований с использованием программного комплекса, разработанного в ИПМаш НАН Украины по оценке показателей мощности и экономичности замкнутых паротурбинных циклов на низкокипящих рабочих телах (НРТ) с учетом их свойств. Выполнен сравнительный анализ эффективности работы турбоустановки такого типа на когенерационном и конденсационном режимах.
The modes of operation of the appropriate cogeneration unit of a low power (~80 kW) whose closed cycle uses a low-boiling working medium have been analyzed. The engineering solution on the improvement of power plant has been suggested. Realization of the two-cascade thermal circuit would allow us to operate mini-heat and power plants (HPP) both during the winter period and in summer provided that the electric power is increased by 20 to 25 kW. The available low-boiling working media for the second cascade were analyzed and those were selected that maximally meet the requirements set to the thermodynamic efficiency, operation performances, ecological safety and the operation reliability. Using the program system developed by the IPMash of the National Academy of Ukraine the teamcarried out computation investigations of thermal circuits for two-cascade power units. Performances for the power unit operating during the summer period on low-boiling working medium with hot water supply and in the condensation mode have been obtained; the electricefficiency for such modes will be equal on average to 22 % and 27 %, respectively. The computation data for the performances of the second cascade of mini-HPP with the working medium of R-600a were given for 100 % modes and partial modes used for the hot water supply (HWS) that showed the efficiency of the unit operation in the entire loading range. For the regular electric power generation by the cogeneration unit the option of thermal circuit with the parallel mounting of the boiler and the air capacitor at the turbine exhaust duct of the second cascade was calculated that would allow for the operation of the power system in any HWS mode
The modes of operation of the appropriate cogeneration unit of a low power (~80 kW) whose closed cycle uses a low-boiling working medium have been analyzed. The engineering solution on the improvement of power plant has been suggested. Realization of the two-cascade thermal circuit would allow us to operate mini-heat and power plants (HPP) both during the winter period and in summer provided that the electric power is increased by 20 to 25 kW. The available low-boiling working media for the second cascade were analyzed and those were selected that maximally meet the requirements set to the thermodynamic efficiency, operation performances, ecological safety and the operation reliability. Using the program system developed by the IPMash of the National Academy of Ukraine the teamcarried out computation investigations of thermal circuits for two-cascade power units. Performances for the power unit operating during the summer period on low-boiling working medium with hot water supply and in the condensation mode have been obtained; the electricefficiency for such modes will be equal on average to 22 % and 27 %, respectively. The computation data for the performances of the second cascade of mini-HPP with the working medium of R-600a were given for 100 % modes and partial modes used for the hot water supply (HWS) that showed the efficiency of the unit operation in the entire loading range. For the regular electric power generation by the cogeneration unit the option of thermal circuit with the parallel mounting of the boiler and the air capacitor at the turbine exhaust duct of the second cascade was calculated that would allow for the operation of the power system in any HWS mode
Опис
Ключові слова
энергосбережение, турбина, электрическая мощность, возобновляемые источники энергии, ВИЭ, ТЭЦ, низкокипящее рабочее тело, НРТ, power supply, thermal circuit, electric power
Бібліографічний опис
Разработка каскадной тепловой схемы турбоустановки на низкокипящих рабочих телах для сельской энергетики / А. Л. Шубенко [и др.] // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Сер. : Енергетичні та теплотехнічні процеси й устаткування = Bulletin of the National Technical University "KhPI" : coll. works. Ser. : Power and Heat Engineering Processes and Equipment. – Харків : НТУ "ХПІ", 2017. – № 10 (1232). – С. 13-24.