HARDENING OF PARTS OF TURBINE ENGINE AXIAL-FLOW COMPRESSOR ROTOR

Investigation on the hardening of parts of the axial-flow compressor rotor

К вопросу определения показателей топливоиспользования парогазовых установок

The paper analyzes general principles of the developed methodology for determination of fuel consumption indices of the plants which are using high-temperature gas and steam power cycles in any their combination for generation of power energy and heat.Проанализированы общие положения разработанной методики определения показателей топливоиспользования установок, использующих для выработки электроэнергии и теплоты высокотемпературный газовый и паросиловой циклы в любом их сочетании

Some Methodological Aspects of Selection Serials to Be Included in the Information Environment for Researchers in a Technical or Natural Science (by Example of Optoelectronics and Optical Systems)

A comprehensive citation analysis-based methodology for selecting the world scientific serials to be included in information environment for researchers in a specific natural or technical science is featured. The case study was fulfilled for serials to be included in information environment for researchers in optoelectronics and optical systems (OOS) with the use of Journal Citation Reports (JCR) data. The indices taken for serials evaluation were: total citedness of a serial in the selected journals specialized in OOS; the “discipline impact factor” (Hirst 1978) i.e. the impact factor which numerator is the magnitude of a serial citedness not by all the JCR-indexed journals, but by the ones specialized in OOS, the denominator being the number of papers in a cited serial; the magnitude of total citedness of the journals specialized in OOS in a serial under evaluation; the “discipline susceptibility factor” of a serial (Lazarev and Skalaban 2016; Lazarev et al. 2017), i.e. the number of citations to the mentioned specialized journals made in a serial being evaluated divided by the number of papers in a citing serial. The citation window is one year, the publication window is “5+1” years (i.e. 5 previous years plus the year of citing). With the application of the outlined methodology, the selection of serials believed to be necessary to implement research in OOS has been accomplished, and after application of threshold values, merging and elimination some of the data, the list of 538 serials has been determined. The second pair of indices reflects the susceptibility of the serials being evaluated to the research field represented by cited specialized journals

Вісник Харківського національного університету

The adsorption of reduced forms of molybdo-phosphoric, molybdo-antimono-phosphoric and molybdosilicic heteropoly acids with few anion-exchanger on the base of tetradecylammonium nitrate absorbed onto amorphous silica was investigated. The interaction of heteropoly acids with immobilized quaternary ammonium salts was investigated via UV/VIS and solid-phase spectrophotometric methods. The significant influence of the surface groups on the chromophorous system of adsorbed heteropoly anions was shown. Unexpected strong fixing of HPA on the surface was found to be a result of formation of ion associates between heteropoly acids and immobilized tetradecylammonium nitrate and HPA interaction with active groups of the nonmodified silica surface

К вопросу оценки эффективности использования детандер-генераторных установок на ТЭС

The paper considers methods for determination of gas-expansion and generator unit indices when they are applied at a thermal power station. It is shown, that while relating the effect of additional power-and-heat generation output due to heat taking-off from steam turbines to gas-expansion and generator unit to the operation of this unit a specific fuel consumption of power supply from gas-expansion and generator unit can be lower than fuel equivalent of kilowatt-hour.Рассматриваются способы определения показателей детандер-генераторных установок (ДГУ) для случая их использования на ТЭС. Показывается, что при отнесении эффекта от дополнительной теплофикационной выработки вследствие отбора теплоты от паровых турбин на ДГУ на работу непосредственно детандер-генераторной установки удельный расход топлива на отпуск электроэнергии от ДГУ может быть ниже топливного эквивалента киловатт-часа

К вопросу ограничения нагрузки отопительных отборов для получения резервной мощности теплофикационных турбоагрегатов

The paper considers problems pertaining to limitation of heating extraction load of power-and-heat supply turbo-generators with the purpose to obtain a reserve power.Graphical dependences for determination of time period within which an indoor temperature is decreased by 1 оС according to relative heat expenditure for heating and a value of outdoor temperature. The paper reveals the possibility to limit a heating load by 20% within some hours time while observing comfortable indoor conditions.Рассматриваются вопросы ограничения нагрузки отопительных отборов теплофикационных турбоагрегатов для получения резервной мощности.Приводятся графические зависимости для определения времени, в течение которого температура внутри помещения снижается на 1 оС в зависимости от относительного расхода теплоты на отопление и температуры наружного воздуха. Показывается возможность ограничения отопительной нагрузки примерно на 20 % в течение нескольких часов при соблюдении комфортных условий в помещении

Опыт освоения ПГУ Оршанской ТЭЦ

Some data on technical characteristics and running-in of the steam and gas unit at the Orsha Thermal Power Station are given in the paper. The paper contains results of the regime optimization and research in respect of higher operational efficiency of steam and gas unit under partial thermal loadings.Приведены краткие данные о технических характеристиках и освоении ПГУ Оршанской ТЭЦ. Даны результаты выполненных исследований по оптимизации режимов и повышению эффективности работы ПГУ при частичных тепловых нагрузках

Повышение маневренных возможностей теплофикационных парогазовых установок за счет применения электрокотлов

The paper contains the results of efficiency evaluation  of using the electric boilers to improve maneuver capabilities of the cogeneration combined cycle power plants (as an example, 230 MW combined cycle unit of Minsk CHP-3) in comparison with the traditional steam-turbine units of cogeneration power plants.Приведены результаты расчета эффективности применения электрокотлов для повышения маневренных возможностей теплофикационных парогазовых установок (на примере ПГУ-230 Минской ТЭЦ-3) в сравнении с традиционными паротурбинными установками ТЭЦ