The influence of external cooling system on the performance of supercritical steam turbine cycles

• Autorzy: Kosman W.
• Języki publikacji: EN

Abstrakty

EN

The problem presented in this paper refers to the concepts applied to the design of supercritical steam turbines. The issue under the investigation is the presence of a cooling system. Cooling systems aim to protect the main components of the turbines against overheating. However the cooling flows mix with the main flow and modify the expansion line in the steam path. This affects the expansion process in the turbine and changes the performance when compared to the uncooled turbine. The analysis described here investigates the range of the influence of the cooling system on the turbine cycle. This influence is measured mainly through the change of the power generation efficiency. The paper explains the approach towards the assessment of the cooling effects and presents results of the modeling for three supercritical steam cycles.

Słowa kluczowe

EN

cooling; efficiency; steam turbine; supercritical steam

PL

para nadkrytyczna; schładzanie; turbina parowa; wydajność

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2010
• Tom: Vol. 31, no. 3
• Strony: 131--144
• Opis fizyczny: Bibliogr. 9 poz.,Rys., tab., wykr.,

Twórcy

autor

Kosman W.

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

Bibliografia

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• [3] Susta M.R.: Latest development in Supercritical Steam Technology. PowerGen Asia 2008.
• [4] Beer J.M.: Higher Efficiency Power Generation Reduces Emissions. US National Coal Council, Issue Paper 2009.
• [5] Zachary J., Kochis P., Narula R.: Steam Turbine Design Considerations for Supercritical Cycles. CoalGen, Milwaukee 2007.
• [6] Chmielniak T., Kosman W., Kosman G.: Simulation modules of thermal processes for performance control of combined heat and power plant with a gas turbine unit. Applied Thermal Engineering 27(2007), Issue 12.
• [7] Chmielniak T., Kosman W.: Expansion line modeling and strength diagnostics of internally cooled gas turbines. ASME paper GT2004-53550, ASME TURBO EXPO 2004.
• [8] Kosman W.: The possibilities to reduce thermal loads in the casing of the supercritical steam turbines. Archives of Thermodynamics 30(2009), No. 4.
• [9] Kosman W.: Thermal analysis of cooled supercritical steam turbine components. Energy 35(2010), Issue 2.