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Wilfried B. Kraetzig, Ulrich Eckstein, Reinhard
Harte, Ralf Woermann
New German Natural Draft Cooling Towers for
High-efficient Power Generation
1. Introduction
2. Structural elements of NDCTs
3. Loads and design conditions
4. Response behavior
5. Service - life determination
6. Summary
ASCE SEI Structures Congress ' 09 April 29
May 2, 2009 Austin, Texas
Krätzig Partners Engineering Consultants
Bochum / Germany
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50 years of continuity of German high-rise NDCTs
1945-1955 Repair of war-damaged
PPs 1955-1980 New Coal / Lignite PPs 1965
NDCT Ibbenbüren H104m 1970-1985 Nuclear
PPs Several NDCTs with
Hgt160m 1990-2000 New PPs in Germany-East 1997-
today New Coal/Lignite PPs in Germany NDCT
Niederaussem H200m
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH Bochum
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Efficiency effects of NDCTs
Efficiency increase in Power Generation Saving
of natural resources Grid Stabilization Power
generation due to demand during all
seasons Environmental Protection Soft
discharge of residual process heat directly
into air
7
Wilfried B. Kraetzig, Ulrich Eckstein, Reinhard
Harte, Ralf Woermann
New German Natural Draft Cooling Towers for
High-efficient Power Generation
1. Introduction
2. Structural elements of NDCTs
3. Loads and design conditions
4. Response behavior
5. Service - life determination
6. Summary
ASCE SEI Structures Congress ' 09 April 29
May 2, 2009 Austin, Texas
Krätzig Partner Bochum Ingenieurgesellschaft
für Bautechnik mbH
8
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NDCT RWE Lignite Power Plant Neurath 2007
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH Bochum
K P 08/4-19
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NDCT RWE Lignite Power Plant Neurath 2007
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH Bochum
K P 08/4-15
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NDCT Hard Coal Power Plant Datteln 2008
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH Bochum
K P 08/4-10
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NDCT Vattenfall Lignite Power Plant Boxberg 2008
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH Bochum
K P 08/4-3
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NDCT RWE Lignite Power Plant Neurath 2007
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH Bochum
K P 08/4-16
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Composition of Cooling Tower Concrete KT- 60/75
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Actual cooling tower projects made of
high-performance concrete in Germany
20
Wilfried B. Kraetzig, Ulrich Eckstein, Reinhard
Harte, Ralf Woermann
New German Natural Draft Cooling Towers for
High-efficient Power Generation
1. Introduction
2. Structural elements of NDCTs
3. Loads and design conditions
4. Response behavior
5. Service - life determination
6. Summary
ASCE SEI Structures Congress ' 09 April 29
May 2, 2009 Austin, Texas
Krätzig Partner Bochum Ingenieurgesellschaft
für Bautechnik mbH
21
Natural Draft Cooling Towers Response
Classification
Loadings Dead weight D Wind action
W Service temperatures T Settlements,
Seismic, Construction, Responses Linear-elast
ic / materially in-elastic Instabilities
(Static buckling, Imperfection-sensitivity,
Dynamic instabilities) Wind vibrations
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NDCT RWE Lignite Power Plant Neurath 2007
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH Bochum
K P 08/4-23
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Lignite power plant Neurath in boundary layer
wind tunnel
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
K P 08/3-29
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Gust modeling in the wind tunnel
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Bautechnik mbH
K P 08/3-29
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NDCTs Neurath Soil deformation from coal bunker
construction
KP 09/04 - 6
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
30
NDCTs Neurath Finite element models
cooling tower F
cooling tower G
KP 09/04 - 4
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
31
Design Concept for NDCTs due to VGB-610 U (2005)
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NDCTs RWE Lignite Power Plant Neurath 2007
KP 09/04 -1
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH Bochum
33
NDCTs Neurath Main dimensions
KP 09/04 - 2
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
34
NDCTs Neurath Geometry and material data
KP 09/04 - 3
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35
NDCT Neurath G Distribution of shell
reinforcement
minimum reinforcement acc. to BTR
minimum reinforcement acc. to BTR
height m
height m
ring reinforcement cm²/m
meridional reinforcement cm²/m
KP 09/04 - 5
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
36
Wilfried B. Kraetzig, Ulrich Eckstein, Reinhard
Harte, Ralf Woermann
New German Natural Draft Cooling Towers for
High-efficient Power Generation
1. Introduction
2. Structural elements of NDCTs
3. Loads and design conditions
4. Response behavior
5. Service - life determination
6. Summary
ASCE SEI Structures Congress ' 09 April 29
May 2, 2009 Austin, Texas
Krätzig Partner Bochum Ingenieurgesellschaft
für Bautechnik mbH
37
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NDCT Westfalen D Instability modes for D W S
1st instability mode l1 5.90
KP 09/04 - 7
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
46
NDCT Westfalen D Instability modes for D W S
5th instability mode
3rd instability mode
1st instability mode
KP 09/04 - 7
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
47
Measured Concrete Compression Strength and
Youngs Modulus M. Rühl, Der E-modul von Beton,
DAfStb.-Kolloquium 10/2000, 135 -148
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NDCT Westfalen D Natural vibration modes
1st vibration mode f1 0.879 Hz
KP 09/04 - 8
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
50
NDCT Westfalen D Natural vibration modes
3rd vibration mode
5th vibration mode
1st vibration mode
KP 09/04 - 8
Krätzig Partner Ingenieurgesellschaft für
Bautechnik mbH
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Wilfried B. Kraetzig, Ulrich Eckstein, Reinhard
Harte, Ralf Woermann
New German Natural Draft Cooling Towers for
High-efficient Power Generation
1. Introduction
2. Structural elements of NDCTs
3. Loads and design conditions
4. Response behavior
5. Service - life determination
6. Summary
ASCE SEI Structures Congress ' 09 April 29
May 2, 2009 Austin, Texas
Krätzig Partner Bochum Ingenieurgesellschaft
für Bautechnik mbH
57
(No Transcript)
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NDCT Goesgen Arial view
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Wilfried B. Kraetzig, Ulrich Eckstein, Reinhard
Harte, Ralf Woermann
New German Natural Draft Cooling Towers for
High-efficient Power Generation
1. Introduction
2. Structural elements of NDCTs
3. Loads and design conditions
4. Response behavior
5. Service - life determination
6. Summary
ASCE SEI Structures Congress ' 09 April 29
May 2, 2009 Austin, Texas
Krätzig Partners Engineering Consultants
Bochum / Germany
70
Thank you for your attention!
KRÄTZIG PARTNER Bochum Ingenieurgesellschaft
für Bautechnik mbH