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Siemens AG 2010. All r ights reserved.Chart 2
Lets talk about a paradigm switch
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Siemens AG 2010. All r ights reserved.Chart 3
Lets talk about a paradigm switch
Picture Bombardier
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Siemens AG 2010. All r ights reserved.Chart 4
Worlwide increase in LNG demand leading to:LNG tanker sizes are increasing this results in an
increased maximum BOG volume rate at LNG ReceivingTerminals during SHIP UNLOADING .
LNG send out rates are increasing and often totallycompensate BOG volume during HOLDING the GAP
between max. and min. BOG flow is becoming larger.Todays LNG storage tanks are most often of full contain-ment design which allow for pressure fluctuations insidetanks.
Todays BOG single shaft centrifugal compressor designare customized for start/stop operation featuring variableInlet Guide Vanes (IGV) and heated seal carriers.
The combination of above facts implementing a change ofcompressor concept.
LNG Receiving TerminalsSituation have changed plus Progress in Advanced Technology
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Siemens AG 2010. All r ights reserved.Chart 5
Over 30 years experience with BOG handling atLNG export plants as a market-leader
Siemens has developed an innovative concept forLNG import terminals.
This concept features a single-body, single-shaft, multi-stage, centrifugal compressor optimized for small and
medium BOG volume flows and capable of automaticstart/stop operation from ambient as well as from coldconditions with no cool-down required.
This concept opens the door for the paradigm switch to
maintenance-free, safe, economic and environmentallyfriendly BOG handling within Liquefied Natural Gas (LNG)import terminals (onshore as well as offshore), improvingsignificantly the Total Cost of Ownership (TCoO)
LNG Receiving TerminalsSiemens opens the door for the paradigm switch
Picture Bombardier
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Siemens AG 2010. All r ights reserved.Chart 6
Simplyfied BOG Generation Profilealong the LNG chain
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
BOG Volume /Massflow
LNG ChainTransportProduction Regas
LOADING Mode
UNLOADING Mode
HOLDING Mode HOLDING Mode
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Siemens AG 2010. All r ights reserved.Chart 7
Todays LNG Plants
E
LP HP
1 bar -160 C 22 41 bar g
Fuel Gas
System
7 10 bar
Early LNG Plants andTodays LNG Receiving
Terminals
E
LP
6 10 bar Recondenser or Fuel Gas System
1 bar -160 C
BOG Turbocompressors(two casing vs. single casing)
Export Plant (tandem)
Start / Stop Operation
8000 to 39000 m3/h- 163 to - 120 C1.00 to 1.15 bar 2200 to 7500 kW
Import Terminal (single)
Start / Stop Operation
5000 to 33000 m3/h- 163 to - 100 C1.00 to 1.25 bar 2200 to 7500 kW800 to 3500 kW
Siemens worldmarket leader for
cryogenictemperature BOGapplications for LNGLoading Plants
New market for LNGReceiving Terminals
(onshore andoffshore) applyingsame technology asfor LNG Loading
(Export) Plants
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Siemens AG 2010. All r ights reserved.Chart 8
TC
IGV setting-10 to +75
FC
2nd stageHP Pumps
To Vaporizer andGas Pipeline
Recondenser
SuctionDrum
BOGCompressor
Desuperheater
BOG at 1 bar BOG at 8 bar
LNG at 8 bar-162 C (-260 F)
LNG StorageTank
1st stage LPPumps
Simplified Flow SchematicThe onboard BOG recondensing concept
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Siemens AG 2010. All r ights reserved.Chart 9
Compressor selection for import terminalsBOG handling concepts
Concept B
1 x 100%Concept A
2 x 50% or 3 x 33%
Concept D
Concept C
2 x 50%
Increasing LNG sendout / ship size
B O G
v o
l u m e
f l o w
UNLOADINGMode
HOLDINGMode
1 x 100 % hybrid concept
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Siemens AG 2010. All r ights reserved.Chart 11
Among all possiblecompressor designs,
the single-shaftconcept ensureshighest reliabilityand availability.
BOG compressor conceptSingle shaft turbocompressor with vertically split casing
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Siemens AG 2010. All r ights reserved.Chart 12
Single shaft BOG compressor cross sectional drawing
Oil heated Seal Carrier
3D Impeller
Dry Gas Seal
Inlet Guide Vane Unit (IGV)
Special Design FeaturesSingle shaft turbo compressor for cryogenic temperature BOG
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Siemens AG 2010. All r ights reserved.Chart 13
IGV Animation
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Siemens AG 2010. All r ights reserved.Chart 14
L x W x H [mm]: 9,500 X 3,000 X 3,000
weight [kg]: 55,000
BOG single shaft Turbocompressor LayoutCompact single lift package concept
step-up gear
compressor
seal gas panel
oil unit
single liftbaseplate
electric drive
motor
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Siemens AG 2010. All r ights reserved.Chart 15
Single shaft turbo compressor guaranteeshighest reliability and availability plus
maximum safetyNo spare units required
Virtually maintenance free
Lowest weight, minimum footprint (ideal foroffshore)
No gas to atmosphere low noise 85 bD(A)
Easy erection and installation due to fullypiped, wired and teates singel lift compressorpackages
Improving significantly the Total Cost of
Ownership
ConclusionWhy optimize the compressor concept?
Picture Bombardier
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Siemens AG 2010. All r ights reserved.
Our competencedrives your profit
Sven-Erik BrinkFeed Team (BOG Market Specialist)Energy Sector, Oil & Gas Division
Wolfgang Reuter PlatzP.O. Box.10 15 0747053 Duisburg, Germany
E-mail: [email protected]
cell phone +49 172 250 9405
Copyright Siemens AG 2010. All rights reserved.