Aker Solutions LNG

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)


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


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



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


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.


LNG STORAGE – SOME TANK CONFIGURATIONS

Tank for LNG carrier

Offshore and onshore tanks

Pressure vessel for local LNG distribution

Ship

fuel

tanks


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


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.


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.


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


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


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


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


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


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


Prototype; Pictures of the Panel production


Sections (thickness) used

Panels (Extruded & FSW)

t=5,6 mm

Brackets

(Forged)

t=8 mm

Tension beams

(Extruded)

t=10 mm


TIMBER SUPPORTS


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


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


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


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


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.


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”

when we refer to Aker Solutions companies in general or where no useful purpose is served by identifying any particular Aker Solutions company.

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