Evaluating the efficiency of low pressure part of steam turbines based on probing measurements

• Autorzy: Gardzilewicz A.
• Języki publikacji: EN

Abstrakty

EN

A methodology oflow pressure part turbine efficiency evaluation based on measurements of the steam flow parameters in the interspaces between neighbouring stages is described. Specially manufactured probes have been applied carry out such measurements. The efficiencies of the stages operating in the superheated steam zone result directly from experimental values of pressures, temperatures, and flow angles. To complete the efficiency evaluation for the stages operating in the wet steam region, a relevant estimation of blading system losses has been proposed and validated. This evaluation of losses is compatible with the measurement results. Adaptation of a comparative error analysis makes it possible to show the advantages of the methodology over the thermal balance applied during performance tests. The low pressure turbine efficiency evaluation methodology has been applied to numerous steam turbine power units of 200–500 MW output.

Słowa kluczowe

EN

wet steam; steam turbines; measurements; numerical calculations

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN
• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 2017
• Tom: nr 135
• Strony: 41--56
• Opis fizyczny: Bibliogr. 25 poz., rys.

Twórcy

autor

Gardzilewicz A.

• Institute of Fluid-Flow Machinery Polish Academy of Sciences, Fiszera 14, 80-231 Gdańsk, Poland

Bibliografia

• [1] ASME Standards, 2005. Steam Turbines – Performance Test Code. ANSI, ASME, PTC 6.1.
• [2] Baumann K.: Recent developments in steam turbine practice. J. Instn. Elec. Engnrs. 48(1912), 768–842.
• [3] Blazko E., Marcinkowski S., Gardzilewicz A.: An algorithm for the estimation of working parameters in steam turbine stages on the basis of measurement data. Diagnostyka Maszyn Ltd. Int. Rep. 3/94, Gdańsk 1994 (in Polish).
• [4] Gardzilewicz A., Kolovratnik M., Wroblewski W., Marcinkowski S., Petr V., Dykas S.: Experimental and theoretical investigations of steam condensation in LP part of large power turbine. In: Proc. 7th Conf. European Conference on Turbomachinery, Athens 2007, 849– 860.
• [5] Gardzilewicz A., Marcinkowski S.: Diagnosis of LP steam turbines, prospects of measuring technique. In: Proc. ASME Joint Power Generation Conf. (PWR) 28(1995), 3, 627–638.
• [6] Gardzilewicz A., Marcinkowski S., Karwacki J., Kurant B.: Results of measurements of condensing steam flow in LP part of turbine 18K in Belchatow Power Plant. IMP PAN, Rep. 5681, Gdansk 2006 (in Polish).
• [7] Gardzilewicz A., Marcinkowski S., Kurant B.: Thermal and flow investigation in LP part turbine. In: Proc. XXI Turbomachinery Workshop, Krzeszna, Gdansk 2006, paper 12.
• [8] Gardzilewicz A., Marcinkowski S., Gluch J.: Evaluating the efficiency of the low-pressure stages of steam turbine based on probing measurements. The Baumann rules is still valid, Proc. Baumann Contenary Wet Steam Conference, Cambridge, Sept. 2012.
• [9] Gluch J.: The advantages of off-line thermal and flow diagnostics in power industry. In: Proc. 7th Conf. European Conf. on Turbomachinery, Athens 2007, 543–552.
• [10] Gyarmathy G.: Grundlagen einer Theorie das Nassdampfturbine. Juris Verlag, Zürich 1962.
• [11] Kirsh A.K., Abramenko O.B.: Wet steam coefficient influence on the efficiency of LP turbine parts. Teploenergetika 68(1968), 10, 28–30 (in Russian).
• [12] Kleitz Z., Dorey J-M.: Instrumentation for Wet Steam. Proc. Instn. Mech. Engnrs., Part C. J. Mech. Eng. Sci., Spec. Iss. on Wet Steam, Part 1, 218(C8)2004, 811–842.
• [13] Kolovratnik M., Bartos A.: Measuring concentration and sizes of data droplets in steam flow in 18K 360 turbine blade system. Turbomachinery Workshop, Inst. Fluid Flow Mach. IMP PAN, Gdańsk 2007.
• [14] Krzyżanowski J.: On efficiency measurements for large steam turbine LP stages. In: Proc. IMECHE, Part A, 211(1997), London 1997.
• [15] Marcinkowski S.: Instrumentation and the method of experimental tests on steam flow through the last stages of condensing turbines. Theor. Appl. Mech. 24(1976), 1/2, 25–36 (in Polish).
• [16] Moore M.J.: Two Phase Steam Flow in Turbines and Separators. Hemisphere Publ. Corp., Washington-London 1976.
• [17] Moore M.J., Jackson R., Wood N.B., Langford N.W., Walters P.T., Keeley K.R:.A method of measuring stage efficiency in operational wet steam turbines. Proc. Inst. Mech. Engrs., C179(1979), 267–280.
• [18] Namiesnik K., Gardzilewicz A.: Error analysis concerning efficiency evaluation of steam turbines LP parts. Int. Rep. Diagnostyka Maszyn Ltd. 18, 1996 (in Polish).
• [19] Szymaniak M., Gardzilewicz A.: Circumferential asymmetry in flow through steam turbines. In: Proc. 9th European Conf. on Turbomachinery Fluid Dynamics and Thermodynamics, vol. II, Istanbul 2011, 1435–1444.
• [20] Troyanovsky B.M.: Influence of wetness for turbine energy losses. Teploenergetika 10(1978), 28–32 (in Russian).
• [21] Walters P.T.: Wetness and efficiency measurements in LP turbines with an optical probe as an aid to improving performance. Trans. ASME J. Eng. Gas Turbines Power 109(1987), 1, 85–91.
• [22] Wang N.: Nässemessungen in Niederdruckturbinen mit Lichtsonden. Mitt. Inst. Thermishe Strömgungsmachinen 3/82 Issue of the ITSM Uni-Stuttgart (in German).
• [23] Wroblewski W., Dykas S., Gepert A.: Calculation of the steam flow using 3D methods including heterogeneous and homogenous condensation. Numerical Program TRA-Co-Flow. Int. Rep. IMP PAN 5705, Gdansk 2005 (in Polish).
• [24] Yershow S., Rusanov A., Gardzilewicz A., Lampart P., Swirydczuk J.: Numerical simulation of 3D flow in axial Turbomachines. TASK Quart. 2(1998), 2, 319–347.
• [25] Young J.B., Yau K.K., Walters P.T.: Droplet deposition and coarse water formation in low-pressure steam turbines. Trans. ASME J. Turbomachinery 110(1989), 2, 163–172.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)