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Research Papers

Numerical and Experimental Investigations of the Transient Thermal Behavior of a Steam By-Pass Valve at Steam Temperatures Beyond 700 °C

[+] Author and Article Information
Anis Haj Ayed

B&B-AGEMA GmbH,
Juelicher Str. 338,
Aachen 52070, Germany
e-mail: ayed@bub-agema.de

Martin Kemper

B&B-AGEMA GmbH,
Juelicher Str. 338,
Aachen 52070, Germany
e-mail: kemper@bub-agema.de

Karsten Kusterer

B&B-AGEMA GmbH,
Juelicher Str. 338,
Aachen 52070, Germany
e-mail: kusterer@bub-agema.de

Hailu Tadesse

Institute for Power Plant Technology,
Steam and Gas Turbines,
RWTH Aachen University,
Templergraben 55,
Aachen 52056, Germany
e-mail: tadesse@ikdg.rwth-aachen.de

Manfred Wirsum

Institute for Power Plant Technology,
Steam and Gas Turbines,
RWTH Aachen University,
Templergraben 55,
Aachen 52056, Germany
e-mail: wirsum@ikdg.rwth-aachen.de

Dierk von Nordheim

Welland & Tuxhorn AG,
Guetersloher Str. 257,
Bielefeld 33649, Germany
e-mail: dierkv.nordheim@welland-tuxhorn.de

Olaf Tebbenhoff

Welland & Tuxhorn AG,
Guetersloher Str. 257,
Bielefeld 33649, Germany
e-mail: olaf.tebbenhoff@welland-tuxhorn.de

Karl-Heinz Czychon

Grosskraftwerk Mannheim AG,
Marguerre Str. 1,
Mannheim 68199, Germany
e-mail: karl-heinz.czychon@gkm.de

Klaus Metzger

Grosskraftwerk Mannheim AG,
Marguerre Str. 1,
Mannheim 68199, Germany
e-mail: klaus.metzger@gkm.de

Dieter Bohn

RWTH Aachen University,
Templergraben 55,
Aachen 52056, Germany
e-mail: dieter.bohn@rwth-aachen.de

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received April 6, 2014; final manuscript received October 25, 2014; published online December 17, 2014. Assoc. Editor: Samuel Sami.

J. Thermal Sci. Eng. Appl 7(1), 011015 (Mar 01, 2015) (7 pages) Paper No: TSEA-14-1068; doi: 10.1115/1.4029040 History: Received April 06, 2014; Revised October 25, 2014; Online December 17, 2014

Increasing the efficiency of steam power plants is important to reduce their CO2 emissions and can be achieved by increasing steam temperatures beyond 700 °C. Within the present study, the thermal behavior of a steam by-pass valve subject to cyclic operation with 700 °C steam is investigated experimentally and numerically. An innovative numerical approach was applied to predict the valve’s thermal behavior during cyclic operation, which is essential for fatigue life assessment of such a component. Validation of the applied numerical approach has shown good agreement with measurement results, indicating the potential of its application for the valve design process.

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References

Figures

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Fig. 1

725 °C high temperature material test track

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Fig. 2

Schematic structure of the steam by-pass valve experimental configuration

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Fig. 3

Valve FEA model and major boundaries

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Fig. 4

Startup cycle ramp segmentation

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Fig. 5

Schematic simulation sequence

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Fig. 6

CHT model and calculation grid

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Fig. 7

Initial temperature distribution in valve body

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Fig. 8

Temperature distribution in valve body at steady state operation

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Fig. 9

Temperature distribution on sections through valve body at steady state operation

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Fig. 10

3D streamlines with temperatures of steam flow and valve body at steady state operation

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Fig. 11

Measured and calculated temperature trends at reference point T1

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Fig. 12

Measured and calculated temperature trends at reference point T2

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Fig. 13

Measured and calculated temperature trends at reference point T3

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Fig. 14

Measured and calculated temperature trends at reference point T4

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