MULTI-CRITERIA MODELING OF PROCESSES IN A VAPORJET CONDENSATION TURBINE EJECTOR MIXING CHAMBER AND ITS DESIGN
DOI:
https://doi.org/10.14529/power200301Abstract
The paper presents recommendations on designing an efficient mixing chamber and regulating air and steam flows in the elements of a steam-jet apparatus based on the results of multi-criteria modeling of gas-dynamic processes. The paper also reveals the possibilities to provide a greater reduction in losses, air suction into the turbine and equipment repair costs compared to the cases when individual criteria for increasing the steam turbine equipment efficiency are used. The selected calculation methods, i.e. innovative (multi-criteria) and standard (standard), have been analyzed comparatively. As a result of the methods evaluation, the authors selected the following indicators: increased energy efficiency of the turbine due to the prevention of air suction in the turbine seals; increased efficiency of condensing turbines; reduced repair and maintenance costs for the turbine and ejector due to the ejector mixing chamber cross-sectional area optimization. Based on the comparison, the best results were shown with the multi-criteria modeling according to the indicated parameters, the coefficients of the flow rate, working steam consumption, size reduction and increase in service life from 20 to 40 years. The innovative method requires a larger number of optimality criteria and the regulation of process parameters and design geometry based on direct and feedback multi-criteria models. Using multi-criteria modeling, the authors determined the necessary composition of optimization parameters, i.e. the flow area of the designed mixing chamber, steam flow rate and thermodynamic flow parameters, as well as suction pressure.
Downloads
References
Spiridonov E.K., Ismagilov A.R. [Ways of optimizing the operation of a water-air jet vacuum pump in
the vacuum systems of power plants]. Izv. Samar. scientific center of Ros. Acad. Sciences, 2012, vol. 14, no. 1 (2),
pp. 689–692. (in Russ.)
Aronson K.E., Ryabchikov A.Yu., Brezgin D.V., Murmansk I.B. Ezhektory kondensatsionnykh ustanovok
parovykh turbin: uchebnoye posobiye [Ejectors of condensing units of steam turbines: a training manual].
Ekaterinburg, Ural. Fed. University Publ., 2015. 131 p.
Sazonov Yu.A., Kazakova E.S. Struynaya nasosnaya ustanovka [Jet pump installation]. Patent RF,
no. 116190, 2012.
Orlik V.G., Averkina N.V., Nosovitsky I.A. [Overexpenditure of fuel due to air suction into the vacuum
system of steam turbines]. Thermal Power Plants, 2009, no. 11, pp. 2–12. (in Russ.)
Sokolov E.Ya., Singer N.M. Struynyye apparaty [Inkjet apparatuses]. 3rd ed., Revised. Moscow,
Energoatomizdat Publ., 1989. 352 p.
Aronson K.E., Ryabchikov A.Yu., Brezgin D.V., Murmanskiy I.B. Parogazoturbinnyye ustanovki: ezhektory
kondensatsionnykh ustanovok: uchebnoye posobiye dlya vuzov [Steam-gas turbine units: ejectors of condensing
units: a textbook for universities]. Moscow, Yurait Publ., 2019. 129 p.
Reizlin V.I. Matematicheskoye modelirovaniye: uchebnoye posobiye [Mathematical modeling. Textbook].
Moscow, Yurayt Publ., 2016. 128 p.
Fedotkin I.M. Matematicheskoye modelirovaniye tekhnologicheskikh protsessov [Mathematical modeling
of technological processes]. Moscow, Lenand Publ., 2015. 416 p.
Solonina A.I. Tsifrovaya obrabotka signalov. Modelirovaniye v Simulink [Digital signal processing. Modeling in Simulink]. St. Petersburg, BHV-Petersburg, 2012. 432 p.
Brodov Yu.M., Kuptsov V.K., Ryabchikov A.Yu., Aronson K.E., Murmanskiy I.B., Zhelonkin N.V.,
Brezgin D.V., Khayet S.I. Parostruynyy trekhstupenchatyy ezhektor [Three-stage steam jet]. Patent RF,
no. 2645635, 2018.
Brodov Yu.M., Aronson K.E., Murmanskiy I.B., Khayet S.I. [Reliability of steam-jet ejectors of steam
turbine units of TPPs]. Energetik, 2016, no. 12, pp. 40–41. (in Russ.)
Murmanskiy I.B. Sovershenstvovaniye mnogostupenchatykh parostruynykh ezhektorov kondensatsionnykh
ustanovok parovykh turbin [Improvement of multi-stage steam-jet ejectors of condensing units of steam turbines.
Cand. sci. diss.]. Ekaterinburg, 2018. 176 p.
Rivkin S.L., Alexandrov A.A. Termodinamicheskiye svoystva vody i vodyanogo para. Spravochnyye
materialy dlya prakticheskikh i laboratornykh zanyatiy [Thermodynamic properties of water and water vapor.
Reference materials for practical and laboratory studies]. Moscow, Energy Publ., 2012. 84 p.
Akmen R.G., Zheltonozhenko A.P. Metodicheskiye ukazaniya k kursovomu i diplomnomu proyektirovaniyu “Raschet ezhektora” dlya studentov spetsial’nostey 7.090510 “Teploenergetika” i 7.000008 “Energeticheskiy
menedzhment” [Guidelines for the course and diploma design “Calculation of the ejector” for students of specialties 7.090510 “Heat energy” and 7.000008 “Energy management”]. Kharkov, NTU “KhPI” Publ., 2007. 20 p.
Butenko A.G., Smyk S.Yu. [Increasing the efficiency of the central ejectors]. Energy Technologies and
Resource Saving, 2013, no. 2, pp. 62–65. (in Russ.)
Downloads
Published
How to Cite
Issue
Section
