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part of Aker
© 2009 Aker Solutions
ADBT – LNG Tank for Ship Fuel and Small Scale Distribution Developed in co-operation with DnV
Small Scale LNG 2011
Trygve Lund, Aker Solutions
to edit this text Slide 2 © 2009 Aker Solutions part of Aker
Basic Technical Principles: ADBT is a double wall LNG tank
Tank top
Tank walls
Tank bottom
Multiple configurarions with
Standard components3 extruded
components
2 forged
components
Self carrying structure – does not need to be produced on site
Double barrier design
Aluminum Double Barrier Tank (ADBT)
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LIMITED NUMBER OF STANDARD ELEMENTS
■
Friction
stir
welded
panel■
Closure
plates
■
Edge
extrusions■
Tension
stays
■
Forged
tension
stay
brackets■
Forged
corner brackets
■
Extruded
corner reinforcement■
Ø20mm bolted
fasteners
■
Dome
cylinder■
Dome
weld
neck
flange
■
Dome
blind flange■
Timber
supports
■
Thermal
insulation
panels
to edit this text Slide 4 © 2009 Aker Solutions part of Aker
New improved profiles design
■
Old Design was
based
in H profiles
■
New improved
profiles
design
●
The
new
profile
is stiffer, therefore
less metal
is required
●
The
new
profile
has backing integrated
for the
FSW process,
thereby
making the
FSW process more efficinet
■
Both
the
above
elements make the new
design more cost efficient
Tank top
Tank walls
Tank bottom
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PANEL CONSTRUCTION
■
Panels are
produced
by friction
stir
welding●
Welds
are
reinforced
by local
thickening
of
plate
■
Closure
plates are
welded
in with
MIG welding■
Edge
beam extrusion
include
a lip for backing
•VERY COST EFFECTIV PRODUCTION
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MATERIAL
■
Extruded aluminium in grade 6082●
Tensile strength 310 MPa
●
Yield strength not exceeding 85% of tensile strength
■
Pre-stressed high strength austenitic bolts in grade Bumax
109●
Tensile
strength
1000 MPa
●
Yield
strength
900 MPa
■
Laminated timber supports according to EN 1194 grade GL24h●
Compressive
strength
2.7 MPa
■
Thermal insulation in polystyrene or polyurethane panels for vessels or applied polyurethane foam for onshore applications.
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LNG STORAGE – SOME TANK CONFIGURATIONS
Tank for LNG carrier
Offshore and onshore tanks
Pressure vessel for local LNG distribution
Ship
fuel
tanks
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ADBT Tank - The principal advantages
■
Self carrying
structure –
does not need to be produced on shipyard or on site, less vulnerable for impacts on ship’s hull than membrane tanks
■
Double barrier
tank –
environmental compliance, real time tightness evidence■
Prismatic
tanks –
more efficient use of the hull space, lower centre of gravity compared with spherical tanks, enable flush main deck design for
FPSO top
side modules. ■
Marine operation at all filling levels: fit for offshore loading / unloading -
inner structures destroy sloshing waves
■
Cost effective
production –
based on extruded profiles■
Panel fabrication using Friction Stir Welding –
high productivity and material properties
compared with traditional welding
■
Shorter production time■
High strength
cryogenic material■
Flexible
Selection of tank size■
Can be built as a pressure vessel for tank sizes up to about 20 000 m3
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Pressure vessels for distribution of LNG and ship LNG fuel tanks
■
ADBT pressure vessels are a cost effective design. ●
The pressure vessel can be constructed in a yard and transported to its final location.
●
The double wall structure and the tension stays provide a very rigid structure.
●
May be skidded, trailed or lifted. ●
High resistance to dynamic loads ■
ship motions or earthquake loading for land tanks●
The structure is being fabricated from a low number of standardized parts.
■
Exposed view of 5000m3; 7 bar pressure tank (12m x 12m x 38m) showing internal tension stays.
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Typical ship fuel tank (Pressure vessel)
Tank capacity about 280 m35.8 x 8.6 x 5.6 m
The tank can be placed on deckor in the hull and can be shapedto fit the available space.
Such a LNG fuel tank can be built in any size andbe shaped to fit the individual requirements
The Cold Box and associated piping will be subcontracted to experienced vendors.
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ADBT SHIP FUEL TANKS – SOME CONFIGURATIONS
Ship fuel tank; 5000 m3 Pressure vessel
Ship fuel tank; 200 m3
Ship
fuel
tank; 230 m3Shaped
to optimise
space
utilisation
within
the
hull
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ADBT PRESSURE VESSELS
■
Pressure
vessels
may be rectangular.
■
Pressure
vessels
may also
be more
complicated
prisems.
■
Vapour
pressure
up
to 9 bar
■
Design according
to IMO IGC code
type C
■
Design as pressure vessel
according
to EN
13445 or ASME VIII, div. 2
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Advantages Pressure vessel■
Pressure
vessel
do not need
a vapour
recovery
system■
Figure
below
shows 15 days
simulation
The
figure
shows an ADBT tank with
a boil
off of
0.2 % per day. Filling temperature
of
LNG is: –
157C
The
level
increases
due to the
LNG density
decreaseswhen
the
temperature
increases
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SAFETY
■
Double barrier.●
If
one
barrier
leaks
the
load
can
be removed
and the
tank
repaired
before
recommissioning
■
Tension
stays
capable
of
redistributing
load.●
If
one
tension
stay
fails
the
load
can
be removed
and the
tension
stay
be replaced.
■
Failure
of
one
structural
element will
not allow
release
of
cryogenic gas or liquid
under pressure
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PROTECTION
■
For marine applications
thermal
insulation panels of
polyurethane
or polystyrene
will
be
used■
For onshore applications
applied
polyurethane
foam
is used. This
is clad
with
a resilent
coating of
polyurea
for weather
protection.
■
For fire protection
an external
layr
of
rock-wool may
be included.
part of Aker
© 2009 Aker Solutions
Current prototype tank
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Prototype; 200 m3 Pressure vessel (7 bar)
■ Prototype tank (6x6x6m long) showing internal tension stays
Gasnor want to test out a small prototype of the ADBT tank before they plan to order their first commercial tank
AET want in addition to have a demonstration tank to show potential customers for the different applications of the ADBT tank
■
Prototype tank 200 m3●
Jointly being built by Aker Solutions and Gasnor
●
Being installed at Gasnor’s
Snurrevarden
LNG facility (West Norway).
■
The tank will be operational in September 2011
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Prototype; Pictures of the Panel production
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Sections (thickness) used
Panels (Extruded & FSW)
t=5,6 mm
Brackets
(Forged)
t=8 mm
Tension beams
(Extruded)
t=10 mm
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TIMBER SUPPORTS
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LNG Fuel tank market■
New environment requirements will drive change of fuel or heavy modifications of ships
■
Numbers of ships:●
Baltic Sea: 10 000 ships within 5 years (forerunner)
●
North Sea: Similar (around 10 000)●
US: anticipate 15 000 ships, likely to come
●
…. And the rest –
Japan, SEA, Australia are big potential markets■
Options for old ships●
Convert to clean diesel
●
Install scrubber●
Convert to LNG
●
Find another area of operation ■
Newbuilds●
Will select most efficient –
LNG will take significant part
●
DNV: Single most important message from CEO: LNG for Ships!■
Requires also infrastructure to be built●
Coastal LNG carriers
●
Distribution terminals■
Conclusion: LNG Fuel tank and small scale distribution market is
significant
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Competitors – Small tank market, fuel LNG tanks
■
Vacuum insulated pressure tanks ■
E.g. Chart Ferox
and Cryo
AB with tanks up to 1000 m3
■
TGE (Tractebel) is selling single shell cylindrical LNG tanks with drip trays. This tank is mainly used in small LNG vessels/coasters, but is used onshore as well.
“Cold box”Tank
In existing ship installations LNG is stored in cylindrical, double-wall, insulated stainless steel tanks. Box for all valves and product
vaporizers
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Advantages of ADBT vs. competitors
■
Adaptation within a ship structure
●
The ADBT tank can be formed according to the ship structure and allows full utilization of ship hull
●
Cylindrical tanks utilize the hull space much less efficient
■
Distribution tanks: Prismatic vs. cylindrical pressure tanks
●
The prismatic ADBT distribution tank gives better utilization of congested harbor areas compared to cylindrical tanks for LNG distribution terminals
●
A pressure tank is easier to operate and gives more flexibility●
An atmospheric tank does not fit into the small tank market (so far down in the LNG chain)
■
Our main competitors on the small pressure tank market, LNG distribution and ship fuel, is the vacuum insulated and single shell cylindrical tanks.
●
ADBT is the first prismatic pressure tank for LNG storage on the market
to edit this text Slide 25 © 2009 Aker Solutions part of Aker
Summary – ADBT LNG storage tank
■
ADBT is a cost efficient
design for different LNG storage applications
■
Effective sloshing suppression
by ADBT■
Can handle any filling level
for dynamic conditions
■
Efficient utilization
of ship hull ■
Flat upper deck; space for topside process equipment
■
All parts of the tank is accessible for offshore repairs■
Very high safety
rating! Tightness and atmosphere
controlled inter-barrier space■
Cost and time savings
compared to other LNG
containment systems and pressure vessels
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Copyright
Copyright of all published material including photographs, drawings and images in this document remains vested in Aker Solutions and third party contributors as
appropriate. Accordingly, neither the whole nor any part of this document shall be reproduced in any form nor used in any manner without express prior permission and applicable acknowledgements. No trademark, copyright or other notice shall be altered or removed from any reproduction.
to edit this text Slide 27 © 2009 Aker Solutions part of Aker
Disclaimer
This Presentation includes and is based, inter alia, on forward-looking information and statements that are subject to risks and uncertainties that could cause actual results to differ. These statements and this Presentation are based on current expectations, estimates and projections about global economic conditions, the economic conditions of the regions and industries that are major markets for Aker Solutions ASA and Aker Solutions ASA’s
(including subsidiaries and affiliates) lines of business. These expectations, estimates and projections are generally identifiable by statements containing words such as “expects”, “believes”, “estimates”
or similar expressions. Important factors that could cause actual results to differ materially from those expectations include, among others, economic and market conditions in the geographic areas and industries that are or will be major markets for Aker Solutions’
businesses, oil prices, market acceptance of new products and services, changes in governmental regulations, interest rates, fluctuations in currency exchange rates and such other factors as may be discussed from time to time in the Presentation. Although Aker Solutions ASA believes that its expectations and the Presentation are based upon reasonable assumptions, it can give no assurance that those expectations will be achieved or that the actual results will be as set out in the Presentation. Aker Solutions ASA is making no representation or warranty, expressed or implied, as to the accuracy, reliability or completeness of the Presentation, and neither Aker Solutions ASA nor any of its directors, officers or employees will have any liability to you or any other persons resulting from your use.Aker Solutions consists of many legally independent entities, constituting their own separate identities. Aker Solutions is used as the common brand or trade mark for most of these entities. In this presentation we may sometimes use “Aker Solutions”, “we”
or “us”
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