Wyniki wyszukiwania - BazTech

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Steam turbine stage modernisation in front of the extraction point

Szymaniak M.

Polish Maritime Research

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2018

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nr 2

116--122

EN

The paper presents modernisation of the steam turbine stage situated in front of the turbine extraction point, based on a 225 MW turbine LP stage as an example. The modernised design is intended to better control the steam flow in this area. In the presented design a special ring is used to drive the steam leakage flow directly to the heat exchanger. The performed experiments and numerical analyses confirmed measurable exploitation and efficiency advantages of the introduced modernisation. So far, it has been successfully applied in a number of turbines working in inland power plants, but its use can be easily extended, without need for further modification and without advantage loss, to marine turbines, especially those used as main propulsion in sea-going vessels.

2

Zastosowanie techniki numerycznej CFD do modernizacji stopni turbin parowych części NP w obrębie upustów regeneracyjnych

Szymaniak M.

Mechanik

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2016

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R. 89, nr 7

840--841

PL

W artykule przedstawiono sposób poprawy pracy stopnia turbinowego wraz z wymiennikiem regeneracyjnym poprzez wprowadzenie pierścienia zgarniającego parę z przecieku nad niebandażowaną łopatką wirnikową bezpośrednio do komory upustowej. Przedstawiono porównanie wyników obliczeń numerycznych dotyczących konstrukcji z zamontowanym pierścieniem i oryginalnej. Obliczenia numeryczne niezmodernizowanej konstrukcji zostały wykalibrowane na podstawie pomiarów wykonanych na rzeczywistym obiekcie pracującym w jednej z polskich elektrowni.

EN

The article presents a methodology which has led to the improvement of turbine stage performance in the area of the regenerative steam extraction chamber by introducing a ring which collects the leakage flow from over unshrouded rotor blade tips and directs it to the extraction chamber. Comparison is made between the results obtained for the initial design (without a ring) and that with the mounted ring. The results obtained for the initial construction were calibrated on the data measured on a real turbine in a Polish power plant.

3

Performance analysis of a new LP stage located upstream of the extraction point in a 225 MW turbine

Gardzilewicz A., Szymaniak M., Głuch J.

Journal of Power Technologies

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2012

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Vol. 92, nr 4

241--248

EN

A new design of steam turbine stages upstream an extraction point is presented. In this solution a special ring guides the steam leakage flow directly to the heat exchanger. The experiments and calculations have confirmed advantages of the new design as manifested by turbine operating features and efficiency. The design has been applied in 30 old turbines with Baumann stages. Recently, the patent was used in the LP exit ND-41A of modernised 225 MW turbines in the Polaniec and Kozienice power plants.

4

Modernisation of Steam Turbine Construction at Regenerative Steam Extraction Point

Szymaniak M., Gardzilewicz A.

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

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2010

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Vol. 14, No 4

319-327

EN

The paper presents a methodology which has led to improvement of the turbine stage performance in the regenerative steam extraction chamber area by introducing a ring which collects the leakage flow from the gaps over unshrouded rotor blade tips and directs it to the extraction chamber. A comparison is made between the results obtained for the initial design (without a ring) and the design with the ring mounted. The results obtained for the construction were calibrated using the data measured on a real turbine in a Polish power plant.