Analysis of erosion hazards in turbines due to power units operating in low load conditions

• Autorzy: Rusin A. , Łukowicz H. , Bieniek M.
• Języki publikacji: EN

Abstrakty

EN

Coal fired power units are having to operate with higher operational flexibility due to changes in the structure of energy systems brought about by the increased production of electric energy from renewable sources. The flexibility at issue relates to frequent changes of generated power and long-running operation at minimum load. By operating in this mode coal fired power units compensate for the stochastic character of energy generated from renewable sources and ensure a desirable reliability level for energy systems, but at the same time it has various impacts on the durability and failure frequency of their component parts. One of the problems which can arise during the operation of turbines working at low loads is increased erosion of the last stage blades of the LP part. This paper presents an analysis of turbine operation conditions which may lead to increased erosion hazards for the blades of the LP part. We address the problem of temperature drop of the re-superheated steam during low load operation of the unit and investigate the impact of erosion losses on the change of dynamic state of the turbine’s last stage blades.

Słowa kluczowe

EN

erosion hazards; turbine blades erosion; erosion; low load conditions

PL

zagrożenia erozją; erozja łopatek turbiny; erozja; warunki obciążenia

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2017
• Tom: Vol. 97, nr 5
• Strony: 366--372
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Rusin A.

• Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Konarskiego 18, 44-100 Gliwice, Poland

autor

Łukowicz H.

• Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Konarskiego 18, 44-100 Gliwice, Poland

autor

Bieniek M.

• Institute of Power Engineering and Turbomachinery, Silesian University of Technology, Konarskiego 18, 44-100 Gliwice, Poland

Bibliografia

• [1] A. Górecka-Zbrońska, Aspekty wytwarzania energii ze źródeł odnawialnych w polskiej energetyce zawodowej, Rynek Energii 1 (122).
• [2] W. Kosman, Matching of a gas turbine and an upgraded supercritical steam turbine in o-design operation, Journal of Power Technologies 95 (1) (2015) 90–96.
• [3] A. Mirandola, A. Stoppato, E. L. Casto, Evaluation of the effects of the operation strategy of a steam power plant on the residual life of its devices, Energy 35 (2) (2010) 1024–1032.
• [4] P. Keatley, A. Shibli, N. Hewitt, Estimating power plant start costs in cyclic operation, Applied energy 111 (2013) 550–557.
• [5] A. Stoppato, A. Mirandola, G. Meneghetti, E. L. Casto, On the operation strategy of steam power plants working at variable load: Technical and economic issues, Energy 37 (1) (2012) 228–236.
• [6] A. Rusin, M. Bieniek, M. Lipka, Assessment of the rise in the turbine operation risk due to increased cyclicity of the power unit operation, Energy 96 (2016) 394–403.
• [7] J. Krzyżanowski, Erozja łopatek turbinowych [Erosion of steam turbine blades], Ossolineum, Wrocław, 1991.
• [8] S. Perycz, Turbiny parowe i gazowe [Steam and gas turbines], Ossolineum, Wrocław, 1992.
• [9] W. Wróblewski, S. Dykas, A. Gepert, Modelowanie przepływu pary wodnej z kondensacją heterogeniczną [Modelling the flow of water steam with heterogenic condensation], Vol. 95, Zeszyty Naukowe Politechniki Śląskiej, Gliwice, 2006.
• [10] H. Keller, Korrosions- und Erosionsprobleme bei Sattdampfturbinen, KWU, 15468 PA 0579, Kraftwerk Union A.G. (1979).

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).