Confidential. Not to be copied, distributed, or reproduced without prior approval.

Electric Motor-Driven Compression System (eLNG)

Confidential. Not to be copied, distributed, or reproduced without prior

approval.

Summary

April 5, 2017 2

• LNG plant: process and eLNG advantage solution

•Electric motor-driven compression system design

challenges

•System Test Validation

•Conclusion

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approval.

ALNG I

ALNG II&II

ALNG IV

Woodside LNG I

Woodside LNG II

Woodside LNG III

Woodside LNG IV

Woodside LNG V

Skikda LNG

Arzew LNG

Angola LNG

Segas LNG

Idku LNG I

Idku LNG IIEG LNG

MLNG DUA

MLNG TIGA 7&8

Petronas Tr 9

Oman LNG I-II

Qhalat LNG

Peru LNG

Pluto LNG

Darwin I LNG

PNG LNG 1&2

Nigeria LNG I-II

Nigeria LNG III

Nigeria LNG IV-V

Nigeria LNG VI

Tangguh LNG 1-3

Gorgon LNG 1,2,3

QC LNG 1&2GLNG 1&2

APLNG 1&2Wheatstone LNG 1&2

Ichthys 1&2

Hammerfest LNG

Sakhalin II LNG Tr 1-2

Yemen LNG

SP LNG 1&2

SP LNG 3-5 Dominion LNG

Yamal LNG 1-3

RasGas I-V

RasGas VI-VIIQatarGas Tr 1-3

QatarGas II Tr 4-5

QatarGas III Tr 6-7

PRELUDE

EXMAR

PF LNG 1&2

CCLNG 1-2

Freeport 1-3

Cameroon LNG I-II-II

Donggi LNG

GOLAR

#103 train awarded...400 mtpa equivalent LNG capacity

LNG total fleet of >850 equipment: +300GT; +500CC; +80 w Electric Motors (Helpers and Main)

~60 String Tests performed @ November 2016

GE Experience in LNG

Confidential. Not to be copied, distributed, or reproduced without prior

approval.

LNG plant process and eLNG advantage solution

April 5, 2017 4

Confidential. Not to be copied, distributed, or reproduced without prior

approval.

Freeport LNG Plant & Process

Pre-cooled mixed refrigerant process

(APCI)

• 3 LNG train

• 13.9 Mtpa of Liquefied Gas

• 2 Bcf/d of Feed Gas

C3

–P

reco

olin

g

Loop

Optimized process with:

• 4 kettle pressure levels (liquid/vapor phase

equilibrium) for pre-cooling

• Tight inter-stage pressure tolerances

• 2 kettle pressure levels (liquid/vapor phase

equilibrium) for main cooling

MR

–M

ain

Co

olin

g

APCI's C3-MR liquefaction process

(only one C3 return line is shown for simplicity)

Confidential. Not to be copied, distributed, or reproduced without prior

approval.

eLNG advantage solution

Challenges

• Machine Size & Single Body Absorbed

Power.

• 75MW electric motor

• Very rigorous validation test campaign

Advantages

• Lower emission, dimensions and weight

• ready for start-up in very short time

• operating flexibility to cover different conditions

due to speed flexibility

Scatter Plot of LNG Power

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approval.

Electrical System Design Challenges

April 5, 2017 7

Gas Insulated Swichgear

• 138KV

• SF6 type

Transformer

• 138 KV 50/60Hz

• ONAN

• #3 secondary windings

VFD

• LCI 96 MVA

• 11 KV

• N+1 Tyristors

Motor

• 75 MW Synchronous 2p

• 3000 rpm (80%-105%)

• 2x11 KV – three bearings

Ehouse

• #3 modules

• Minimal mech/ele site interconnections

• Aux panel MV SW, MCC,DCP,AC UPS

Challenges

• LCI Harmonic Filter design based on more

than 600 network and operating configurations

• New Motor Frame Design

• Rotordynamics design on wide speed range

• Electromechnical System Integration

• Modularized BOP solutions (Ehouse) to reduce

site installation

Leverage GE experience in LNG design

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approval.

Centrifugal Compressor Design Challenges

April 5, 2017 8

Propane Train

• 3MCL1605 model

• Axially Split Casing

• 5 wheels arrangement in

a single body

• 3 internal side stream flows

MR Train

• MCL1065 + 2BCL1007 models

• Axially and Radially Split Casings

• Very high volume flow rate (150000 cfm)

• Big size of removable part (68T)

Entire machine (190T)

Optimized Aerodynamic Design Optimized Casing Sizing

and Sealing

Detailed study for Bundle

Assembly/Disassembly

Real power density compressor

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approval.

Surge Modelling

April 5, 2017 9

surge occurrence and

frequency during ESD

absorbed power in reverse

flow-positive rotation (IIQ)

CC deep chock exploration

Development/Improvement of production

design tool with all physics inside

Sizing of bypass valve & Active controls

Enhance modelling capability...reduce design cost, increase robustness;

Greatly reduce use of HGB (BOP reduction)

Extend operating range on the left of SLL by more than 10%

Extend CCS DB curves beyond present chock limits down to (or close to) zero head.

Benefits

Increase operating flexibilty...maximize production

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approval.

Rotordynamics

April 5, 2017 10

Lateral Stability Test

Operational Modal Analysis:

- Logarithimc decrement measurement

- No need of magnetic exciter

- Proven back-to-back test w/ exciter

35

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

27.5

30

32.5

Frequency [Hz]

DEGLOG: 0.1113

Res. Freq :52.7Hz - Res. Speed :3159.3rpm - AF:28.2178 - Zeta:0.0177

Start: 38.7Hz (2323.2rpm) - Stop: 64.6Hz (3877.0rpm)

(04/03/2013 14:03:30) - (04/03/2013 14:05:13)

65.357631.7714 35 40 45 50 55 60

Selected

Original

Laurentian

MID_plane_BW (xrev1)

Analytical Model (OMA)Exciter

NO Exciter anymore needed...reliable way to monitor

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approval.

• Interharmonic studies

- Network resonances

- LCI harmonic Filter design to comply with

distortion limits

• Real Time Simulation platform to validate VFD control

- LCI Real control rack

- Mechanical Torsional mode

- Electrical grid model

• Sub Synchronous Torsional Interaction study

- Mechanical marginal stability...low mechanical damping

- Direct Torsional Excitation...air gap torque harmonic from VFD

- System Closed loop behaviour...ele+mech+ctrl setting

Electrical System Integration

April 5, 2017 11

Closed loop validation with LCI real control rack

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approval.

System Test Validation

April 5, 2017 12

Confidential. Not to be copied, distributed, or reproduced without prior

approval.

System Test Validation

In house O&G test bench with high available power (+100MW)

Test performed

• Compressor Mechanical Running test

• Compressor Thermodynamic Test

• Full-speed Full load Test (FSFL)

Validation

• Compressor rotordynamic

• Compressor mechnical behaviour (journal & thrust bearing)

• Motor rotordynamic/frame design

• Motor thermal design (temperature rise test)

• System operability and control

• Train torsional behaviour

• Auxiliaries functionality

Full electrical system validation

Torsional Vibrations by TVCS

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approval.

Monitoring and Diagnostics Train Damping System

• Real time advanced torsional

monitoring at train level

Plant Active Damping

Torsional Vibration Control System (TVCS digital edge)

Train closed loop & real time

control of torsional stress• Real time mitigation of

SSTI events at plant level

Ready for PREDIXTM based App Operation

Confidential. Not to be copied, distributed, or reproduced without prior approval.

Confidential. Not to be copied, distributed, or reproduced without prior

approval.

Conclusion

April 5, 2017 15

Confidential. Not to be copied, distributed, or reproduced without prior

approval.

Conclusion

• e-LNG solution is a valid alternative to traditional LNG

when there are emission, space and weight limitation.

• The technology with Voltage Source Inverter fed

induction motor can be another option.

• The validated design approach together with testing

capacity allows mitigate any technical risk even for

scaled up e-LNG trains.