SZAG WindEnergy K-Tower A4 EN 20180702
6
K-Tower Onshore With standardized tubular products toward the new onshore tower age An effective approach to greater hub heights
Transcript of SZAG WindEnergy K-Tower A4 EN 20180702
K-Tower OnshoreWith standardized tubular products toward the new onshore tower age
An effective approach to greater hub heights
Scope of delivery
D1 FoundationK-JacketTransition pieceTubular tower
Turbine 2.0 to 4.5 MWHub height 90 - 150 m and more
Tubular tower Ø = 2.5 to 4.3 m
Transition pieceK-Jacket 4 legs Ø = 610 to 813 mm
Braces: UPE sections ≤ 360 mm or tubes with Ø = 273 to 382 mmJacket weight up to 250 t
Foundation 4 footings
The concept has been developed together with Peter Kelemen (Salzgitter) and W2E Wind to Energy GmbH (Rostock) and JBO (Hamburg)
Interface
Tubu
lar t
ower
Exte
rnal
del
iver
y
Various foundation levels possible
TP
Deliv
ery
by S
alzg
itter
140
130
120
110
100
90
80
70
60
50
40
30
20
10
K-Ja
cket
(4 le
gs)
Deliv
ery
by S
alzg
itter
Transition piece K-node
Secondary SteelAccording to the customer’s demand: ladder, hoist, cable tray etc. All common systems are available.
K-Jacket with tubular tower K-Jacket with lattice towerAction 1 3 8 10 12 15 16 18 20 22 23 day 1 3 8 10 12 15 18 20 22 23 24 26 27 28
Site preparation
Excavation
Precast found. parts
Cast found. parts
Backfi lling
Assembly K-Jacket
Preparation TP
Assembly lattice tower
Erection
Finish
Site clean up
Final check
Comparison of K-Tower concept to market products
Main structural details
The concept has been developed together with Peter Kelemen (Salzgitter) and W2E Wind to Energy GmbH (Rostock)
Comparison of K-Tower weight with market products and publications (Vindforsk Project (Sweden) and WindPACT (NREL USA))
Construction time on sitefastest possible performance under optimal conditions
B
B
B-B
B
B
B-B
05.0E+050.0E+00 1.0E+06 1.5E+06 2.0E+06
200
400
600
800
Tow
er m
ass
[tons
]
Hub height x swept area [m3]
K-Tower
Vindforsk project (Conv.)
Vindforsk project (Segment)
WindPACT baseline design
WindPACT fi nal design
Footing system
Each jacket leg has its own single footing
Soil replacementSuffi cient bearing capacity about 1 to 1.5 m below footing bottom
Pile foundationSoil conditions allow the pile foundation
Raft footingSuffi cient bearing capacity
Section 1-1
Vibro (if possible)Suffi cient bearing capacity about 1.5 to 7 m below footing bottom
The concept has been developed together with Peter Kelemen (Salzgitter)
Plan
Single footings
Dimension limits (depends on external impacts / effects)
16 to 21 m
5 · 5 to 7 · 7 m
Jacket leg
Brace
1 1
K-Ja
cket
Vibr
o co
lum
n
Sand / gravel
Subsoil
Appr
ox. 2
.5 m
Prefab piles
Pile capBackfi ll
Backfi ll
Jacket leg Brace
Shaft
Slab
The concept has been developed together with Peter Kelemen (Salzgitter) and W2E Wind to Energy GmbH (Rostock)
Features
• No enormously large concrete foundations required, as each jacket leg has its own footing.
• The tower can also be installed in soils with lower bearing capacity. Simple soil tests are suffi cient.
• The jacket design is optimally adapted to the (mainly axial) forces acting on it. All jacket parts are prefabricated.
• The jacket structure is made up of standard sections and tubes in steel grade S355.
• All the jacket components can be transported by standard trucks.
• Easy on-site assembly (bolted connections) allows for a high level of local content.
• The use of lock bolts means there is no need for checking/
maintenance of the connections during the operating period.
• Dismantling at the end of the tower’s service life is just as easy. Even the footings can be completely removed.
Cost comparision of common hybrid towers and K-Towers (hub height > 110 m)
Cost reduction
Hybr
id
norm
al s
ubso
il
poor
sub
soil
com
plet
e in
stal
latio
nno
rmal
sub
soil
com
plet
e in
stal
latio
npo
or s
ubso
il
com
plet
e in
stal
latio
nan
d di
sman
tling
K-To
wer
100 %
25 %
33 %
40 %
0 %
The main cost-saving factors are the simple foundation, the material-saving design, easy transportation and quick assembly / dismantling.
Dismantling
Transportation Assembly
Fabrication
Foundation
SZ /
K-To
wer
Ons
hore
/ E
/ 07
2018
he
sels
vom
berg
.de
Salzgitter AGEisenhüttenstraße 9938239 SalzgitterGermany
Salzgitter AGSalzgitter Mannesmann RenewablesBeisenstraße 5345964 GladbeckPhone: +49 2043 407-914Fax: +49 2043 407-990
