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Ship to Ship LNG Transfer Technology

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Presentation on theme: "Ship to Ship LNG Transfer Technology"— Presentation transcript:

1 Ship to Ship LNG Transfer Technology

2 Excelsior Class EBRV 138,000 m3

3 LNG STS Transfer Double Banked at Anchor

4 LNG STS Configurations
LNG transferred from LNG Carrier to EBRV down the dock Gas Delivered from EBRV to facility via HP Gas Arm LNG transferred across dock from LNG Carrier Gas Delivered from EBRV to facility via HP Gas Arm LNG Gas LNG Gas LNG Transferred via Ship to Ship Transfer Gas Delivered from EBRV to facility via HP Gas Arm LNG Gas

5 LNG Lightering

6 Double-Banked at Bahia Blanca

7 Bahía Blanca GasPort (Argentina)
Dockside LNG regasification Utilizes ship-to-ship LNG transfer with continuous natural gas send out Capable of 400 mmscfd throughput (closed-loop mode) Provides seasonal service during Argentine winter Short development time and low cost Final investment decision to in-service in less than 6 months Fixed facilities cost <5% of a land-based LNG terminal Project partners are YPF and Repsol-Gas Natural Gas offloading arm Bahía Blanca GasPort Excelsior docked at the Bahía Blanca GasPort

8 LNG STS Transfer Risk Management
means Let’s Not Guess

9 LNG STS Transfer Partners / Development Basis
Developed with partners Exmar NV / Exmar Offshore USA Skaugen PetroTrans STS Operation must meet applicable standards IMO - Gas code Class approvals by BV for LNG-RV’s, focus unrestricted liquid levels / all shipboard systems. IACS rules for LNGC: - Liquid level restrictions due to sloshing loads OCIMF / SIGTTO Ship to Ship Transfer Guide (Liquefied Gases) Second Edition / Draft LNG STS Transfer Guidelines SIGTTO LNG specific STS Transfer Considerations USCG: 33 CFR 156 Subpart B and C EN standards for cryogenic transfer systems

10 LNG STS Transfer Initial Engineering & Feasibility
By BUREAU VERITAS Target: assess measurable operational criteria to avoid sloshing damage in LNG-C due to any level of partial filling during LNG transfer Conclusion: LNG-C maximum roll angle 2° ; keep heading +/-30° into direction of significant waves Hs < 2.0 m BY GTT Target: determine the maximum LNG transfer flow rate compatible with the treatment capacity of the increased Boil-Off Gas (BOG) Conclusion: Up to 6,000 m3/h with 60 mbar cargo tank pressure difference between LNG-RV and LNG-C HAZID / HAZOP : Original STS design Lloyds Register / BMT

11 LNG STS Transfer Risk Based Assessments
Computer Motion Simulation Exmar Offshore / Yokohama Rubber Co. Ltd. Maneuvering Simulations Ship Maneuvering Simulator Training Center – Trondheim / Antwerp Maritime Academy / Lloyds Register / South Tyneside Technical College / SIPORT – Madrid STS Operations Plan Skaugen PetroTrans Dynamic Mooring Analysis Tension Technologies International Operation Manuals for rigging STS equipment Developed based on extensive practical tests on board HAZID / HAZOP : final review Including operation manuals, training and procedures (Lloyds Register)

12 LNG STS Transfer Manifold Configuration 3 liquid lines 6 hoses
Blank flange 1 vapour line 2 hoses Feeder ship LNGRV Spool pieces Saddles Flexible hoses Dry-Break ERC Water curtain & bath

13 LNG STS Transfer Gear General Arrangement

14 LNG STS Transfer Equipment Class Approvals
Reducing ‘Y’ Spool Pieces Class approval (BV) Emergency Release Couplings Type approval (BV) LNG Cargo Transfer Hoses Type approval (DNV) Manifold platform structural verification Hose Support Saddle verification

15 LNG STS Transfer Cargo Transfer Hose
Stainless Steel End Fittings Epoxy Filled & Swaged Standard ANSI 8” Flange Type Approved by Class for STS Transfer of LNG EN 1474 Compliant

16 LNG STS Transfer Cargo Transfer Hose
57 Layers of Polyethylene Film and Fabric Inner / Outer Stainless Mandrel Electrically Continuous Failure Mode Leak before fail 400,000 Cryogenic Cycles Comprehensive testing by TNO Flow tests at Nikisso w/ up to 1500 m3/hr

17 LNG STS Transfer Cargo Transfer Hose
Composite Hose 8” Diameter 15 m Length 0.65 m Min. Bend Radius 300 Liter Volume per Hose DNV Type Approved Fit for Purpose Light and Flexible

18 LNG STS Transfer Cargo Hose Storage
Hose Storage on EBRV Test Blinds on Hose Ends Internal Nitrogen Blanket Test, Inspection, Records

19 LNG STS Transfer Cryogenic Hose Impact Test
224 kg x 1.5 m 3 bar LN2 No Leakage

20 LNG STS Transfer Sudden Impact!

21 LNG STS Transfer Cryogenic Hose Impact Test

22 LNG STS Transfer Cryogenic Hose Crush Test
200 mm Crush Plate 270 kN 3 bar LN2 106 bar Pressure Test Severe Leakage – No Burst

23 LNG STS Transfer Cryogenic Hose Crush Test

24 LNG STS Transfer Cryogenic Hose Pressure Test

25 LNG STS Transfer Cryogenic Hose Integrity
50% Damage of Outer SUS Wire 6 bar – No Leakage 34 bar – Burst Pressure – No Jetting

26 LNG STS Transfer Cryogenic Hose Cycling
400,000 Cycles 2 Meter Stroke Certified by TNO

27 LNG STS Transfer Hose Support Saddle
One per Hose Pair – Total Four Saddles on Each Vessel Provides Protection and Support in Way of Hand Rails Maintains Adequate Bend Radius of Hose Transfer Loads from Hoses to Manifold Deck Chafe Protection for Hoses 8 mm Marine Aluminum FMEA on saddle

28 LNG STS Transfer Hose Support Saddle

29 LNG STS Transfer Reducing Wye Spool Pieces
16 “ x 12” x 8” (2) Standard ANSI 150# Flanges BV Class Approved Handled by Crane Horizontally

30 LNG STS Transfer Specific Controls and Safety
Emergency Shut Down (ESD) Pneumatic ESD systems connecting LNGC with EBRV Electric and / or Fiber Optic umbilical available Additional Water Curtain System at both manifold areas Protect ships’ trunk deck / cargo tank covers from accidental LNG release Includes ‘water bath’ on main deck under manifold area

31 LNG STS Transfer Water Curtains & Bath
Additional water curtain rigged under each manifold Water bath installed on deck under manifold using dams

32 LNG STS Transfer Emergency Release Couplings
Emergency Release Couplings (ERC) KLAW quick release couplings => quick disconnect of hoses in emergency situations Remote operation ‘Dry Break’ Extensive test in cryogenic conditions for STS type approval Actuator reinforced for cryogenic operations

33 LNG STS Transfer ‘Dry-Break’ Emergency Release Coupling

34 LNG STS Transfer Emergency Release Coupling
BV Class Approved Function Tested w/ 1” ‘Hard’ Ice Liquid 10 bar

35 LNG STS Transfer ERC Actuated
0.8 Liter Volume Between The Disks

36 LNG STS Transfer Hose Brake System

37 LNG STS Transfer Equipment, Controls and Safety
Emergency Shut Down (ESD) Pneumatic ESD systems connecting LNGC with EBRV Electric and Fiber Optic umbilical available Additional Water Curtain System at both manifold areas Protect ships’ trunk deck / cargo tank covers from accidental LNG release Includes ‘water bath’ on main deck under manifold area Emergency Release Couplings KLAW quick release couplings offer quick disconnect of hoses in emergency situations Remote operation ‘Dry Break’

38 LNG STS Transfer Fender Arrangement

39 LNG STS Transfer Approach Maneuver

40 LNG STS Transfer Coming Alongside

41 LNG STS TRANSFER Mooring Operation

42 LNG STS Transfer Cargo Hoses Rigged

43 LNG STS Transfer Gear Placement

44 LNG STS Transfer Hose Connection

45 LNG STS Transfer Line Cooldown

46 LNG STS Transfer Projected Time Line
Rigging Fenders hr Approach Maneuver hr Mooring hrs Pre-Transfer Meeting / Gauging 1 hr Connect Hoses hrs Line Cooldown ½ hr ESD / ERC Tests ½ hr Cargo Transfer (130, m3/hr) 26 hrs Hose Drain / Purge / Disconnect 4 hrs Unmooring / Vessel Separation 1 hr Fender Recovery hr Total Projected Time hrs

47 1st Commercial STS Transfer Scapa Flow – 8-9 February 2007

48 LNG STS Transfer Site Specific Assessments
Simulator training with Scapa Flow Pilots and EBRV senior staff at South Shields Technical College (UK) Ballast Water Management issues regarding environmental preservation Waterway management risk assesment with Orkney Harbor Authority, Scotish National Heritage and BMT-Isis Simulator training with Bahia Blanca Pilots and EBRV senior staff at SiPort Risk assessment of non-standard conditions prior to STS operation Primarily for weather considerations and forecasted conditions

49 LNG STS Transfer Full Rate Cargo Transfer (5,950 m3/hr)

50 LNG STS Transfer Routine Inspections

51 LNG STS Transfer Drain & Purge Hoses

52 LNG STS Transfer CTMS EXCALIBUR EXCELSIOR Opening Volume (m3) 132,379
1,197 Volume Transferred (m3) 132,296 131,830 Closing Volume (m3) 83 133,027 BOG Consumed (m3) 215 273

53 LNG STS Transfer Statistics

54 LNG STS Transfer


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