BOG for Receiving Terminals

8/12/2019 BOG for Receiving Terminals

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Siemens AG 2010. All r ights reserved.Chart 2

Lets talk about a paradigm switch


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Lets talk about a paradigm switch

Picture Bombardier


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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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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

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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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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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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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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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Among all possiblecompressor designs,

the single-shaftconcept ensureshighest reliabilityand availability.

BOG compressor conceptSingle shaft turbocompressor with vertically split casing


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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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IGV Animation


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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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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?

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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.

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BOG for Receiving Terminals