Аssessment of the influence of the efficiency of heat conversion in the regenerative system of turbo installations of power plants on indicators of the quality of their work.
Abstract
DOI: https://doi.org/10.32820/2079-1747-2023-31-80-86
The article provides an improved method for calculating the parameters of the thermal part of
steam vapors, which makes it possible to quickly and with sufficient accuracy evaluate the change in
the efficiency of heat conversion in a turbine depending on a change in the operating mode or a
change in the design of individual circuit elements. The improvement makes it possible to significantly reduce the volume of calculation operations for determining the element that deviated from the calculated mode of operation and losses as a result of this. The essence of the improvement is that the
turbo installation is divided into separate regenerative stages, the number of which is determined by
the number of regenerative selections. At the same time, the re-generative stage consists of a series of
sequentially (pairwise) included elements. The heat balance equation for the sequence of the technological process in the regenerative stage is given, as well as the heat balance equation, taking into account the fact that in the elements of the regenerative stage heat is not consumed equally for the flow
part, the chamber and steam pipeline of the selection, the regenerative heater and the drainage systems. A system of equations is presented that describes the relative values of heat flow distribution in
each element of the regenerative stage. The obtained criteria characterize the efficiency of heat conversion in the elements of the regenerative stage and determine the quality indicators of the turbine
operation, namely: the coefficient of the useful effect of the conversion of heat into work, the coefficient of energy losses in the elements of the regenerative stage, and the coefficients of heat return. The
method of determining energy overspending as a result of a technological failure (partial or complete)
by comparing the actual heat consumption with the reference one is given. The equation for determining the internal efficiency of a turbo installation is presented in order to assess the effect of changes in
the regenerative degree on the operation of the turbo installation. The improved technique allows analyzing the condition of the elements of the turbine installations of power plants both during operation
and when choosing the optimal modernization options and, depending on this, taking measures to
eliminate technological failures in the power unit and improving the indicators of the quality of the
power units, namely the indicators of reliability and energy efficiency
Downloads
References
Shelepov, IG & Mihajskij, DV 2005, ‘Issledovanie vliyaniya rezhimov raboty NPK na effektivnost raboty energobloka’ [Studying the impact of NPC operating modes on the efficiency of a power unit], Vostochno-Evropejskij zhurnal peredovyh tehnologij, no 3(2), Pp. 122-125.
Kabinet Ministriv Ykrainy 2017, Nova energetichna strategiya Ukrayini do 2035 roku: «Bezpeka, energoefektivnist, konkurentospro-mozhnist» [New Energy Strategy of Ukraine until 2035: "Security, energy efficiency, competitiveness"], viewed <http://mpe.kmu.gov.ua/ minugol/doccatalog/document?id=244996332>.
Vajs, D, Kalenborn, V, Brandl, G & Vajsa, D (ed) 2014, Ocinka energetichnoyi politiki Ukrayini u porivnyanni z krashimi yevropejskimi praktikamirealizaciyi politiki v sferi energoefektivnosti ta vidnovlyuvanoyi energetiki [Assessing Ukraine's energy policy in comparison with the best European practices of energy efficiency and renewable energy policy implementation], viewed /http://journal.esco.co.ua/esco/2015_3_4/log/art45.pdf>.
Halatov, AA 2016, ‘Energetika Ukrayini: suchasnij stan i najblizhchi perspektivi’ [Ukraine's energy sector: current state and immediate prospects], Visnik NAN Ukrayini, no 6, Pp. 53-61.
Bojko, AV, Usatyj, AP & Rudenko, AS 2014, Mnogokriterial'naja mnogoparametricheskaja optimizacija protochnoj chasti osevyh turbin s uchetom rezhimov jekspluatacii [Multicriteria multi-parametric optimization of axial turbines with regard to operating conditions], NTU «HPІ», Har'kov.
Subotin, VG, Levchenko, YeV, Shvecov, VL, Shubenko, OL, Tarelin, AO & Subotovich, VP 2009, Stvorennya parovih turbin novogo pokolinnya potuzhnistyu 325 MVt [Developing a new generation of 325 MW steam turbines], Folio, Harkiv.
Chernovolenko, VA & Ryabinin, VN 2008, ‘Kogeneracionnye parovye turbiny’ [Cogeneration steam turbines], Tehnogenna bezpeka. Naukovi praci, iss 64, vol. 77, Pp.126-130.
Verhovna Rada Ykrainy 2005, ‘Zakon Ukrayini “Pro kombinovane virobnictvo teplovoyi ta elektrichnoyi energiyi ta vikoristannya skidnogo potencialu”’ [On combined heat and power generation and using waste heat potential], Vidomosti Verhovnoyi Radi, no 20, Pp. 275–285.
Duel, MA, Duel, TL & Shelepov, IG 2000, Optimalnoe upravlenie teploenergeticheskimi ustanovkami elektrostancij [Optimal management of thermal power plants], ChP "KiK", Harkov.
Duel, MA 2006, Avtomatizirovannye sistemy upravleniya energoblokami teplovyh i atomnyh stancij [Automated control systems for thermal and nuclear power units], ChP "KiK", Harkov.
Artyuh, SF, Duel, MA & Shelepov, IG 2000, Avtomatizirovannye sistemy upravleniya energogeneriruyushimi ustanovkami elektro-stancij [Automated control systems for power generation units in power plants], Harkov.
Kanyuk, GI, Bliznichenko, EN, Mezerya, AYu, Melnikov, VE & Babenko, IA 2015, Precizionnye sistemy energosberegayushego avtomaticheskogo regulirovaniya turbogenera-tornyh ustanovok elektricheskih stancij [Precision energy-saving automatic control systems for turbine generator sets in power plants], Tochka, Harkov.
Kanyuk, GI, Babenko, IA, Mezerya, AYu, Kozlova, ML & Suk, IV 2016, ‘Unificirovannaya struktura precizionnyh bystrodejstvuyushih sistem energo- i resurso-sberegayushego avtomaticheskogo upravleniya i regulirovaniya’ [A unified structure for high-precision, high-speed, energy- and resource-saving automatic control and regulation systems], Problemy mashinostroeniya, no 2, vol. 19, Pp. 58-67.
Shelepov, IG & Mihajskij, DV 2006, ‘O nekotoryh problemah ocenki energosberezheniya pri ekspluatacii ustarevshego oboru-dovaniya TES’ [On some problems in assessing energy savings in the operation of obsolete TPP equipment], Vostochno-evropejskij zhurnal peredovyh tehnologij, no 1/2(19), Pp. 173-175.
Kostrykin, VA, Shelepov, IG, Shubenko, AL, Kazak, IA & Sherbenok, YuA 2003, ‘Prodlenie resursa teploenergeticheskogo oborudovaniya energoblokov AES’ [Extending the service life of thermal power equipment in nuclear power units], Sovershenstvovanie turboustanovok metodami matematicheskogo i fizicheskogo modelirovaniya, vol. 2. Pp. 431-434.
