Walvis Bay GasPort FSRU Feasibility Report
XARIS
Confidential Information
Document No.: WBGP-FR-001 Submission Date: 2 January 2014
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Document No.: WBGP-FR-001
Submission Date: 2 January 2014
Neither this report nor the materials submitted with it constitute an offer to provide any good or service, to enter into a contract to provide any good or service or a binding commitment, offer or indication of terms. The making of any such offer or the creation of any contractual or other obligation binding on Excelerate Energy Limited Partnership (“Excelerate”) shall be effected only through a definitive written agreement approved by the Supervisory Board of Excelerate. Although Excelerate has made a reasonable effort to ensure the accuracy of information contained in this document, it makes no representation or warranty concerning the completeness, accuracy or timeliness of any such information. Any such representation or warranty would only be made by Excelerate in a definitive written agreement approved by the Supervisory Board of Excelerate. In addition, certain information contained in this report represent estimates, forecasts, projections, expectations, beliefs or similar expressions (collectively, “estimates”). These estimates are subject to known and unknown risks, uncertainties and other factors which could cause actual results, performance or achievements to differ from the estimates, and Excelerate makes no representation or warranty concerning any such estimate.
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Table of Contents 1.0 EXCELERATE’S OVERVIEW ................................................................................................................................ 4
1.1 Excelerate Energy L.P. (“Excelerate”) ........................................................................................................... 4
1.2 Excelerate Past Project Details ..................................................................................................................... 6
1.3 Operating Experience ................................................................................................................................. 22
1.3.1 Ship to Ship Transfer .............................................................................................................................. 22
1.3.2 Terminal/Vessel Operations .................................................................................................................. 23
2.0 FSRU TECHNICAL CHARACTERISTICS .............................................................................................................. 24
2.1 FSRU Fleet Characteristics .......................................................................................................................... 24
2.2 LNG Containment System .......................................................................................................................... 25
2.3 Description of Vaporizers and Regasification System ................................................................................ 25
2.3.1 Vaporization Modes ............................................................................................................................... 25
2.3.2 LNG Regasification Process .................................................................................................................... 25
2.3.3 High Pressure Gas Delivery .................................................................................................................... 27
2.3.4 Operation and Control of the Regasification System ............................................................................ 28
2.3.5 Baseload Regasification Rates ............................................................................................................... 29
2.3.6 Delivery Rates during LNG Loading Normal Operations ........................................................................ 29
2.4 Boil-Off Gas (“BOG”) Overview .................................................................................................................. 30
2.4.1 BOG Rate ................................................................................................................................................ 30
2.4.2 BOG Management ................................................................................................................................. 30
2.4.3 BOG Generation/Consumption .............................................................................................................. 30
2.5 Expected Hull Maintenance Intervals ........................................................................................................ 31
2.6 Anticipated FSRU Availability ..................................................................................................................... 31
3.0 PROJECT BACKGROUND ................................................................................................................................. 32
3.1 Walvis Bay FSRU Project............................................................................................................................. 32
3.2 Site Access and Location Overview ............................................................................................................ 32
3.3 High Pressure Gas Delivery and LNG Transfer ........................................................................................... 35
3.4 STS LNG Transfer and Flexible Cryogenic Hoses ........................................................................................ 37
3.5 Metocean conditions ................................................................................................................................. 37
3.6 Water Quality and Temperature ................................................................................................................ 37
3.7 Local Permits and Regulations ................................................................................................................... 37
4.0 APPENDICES .................................................................................................................................................... 38
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1.0 EXCELERATE’S OVERVIEW
1.1 Excelerate Energy L.P. (“Excelerate”)
Excelerate is a provider of liquefied natural gas (LNG) storage and regasification services, an importer of LNG, and a
developer of unique market access points around the world (Figure 1). In 2001, Excelerate placed the first shipyard
order to incorporate regasification equipment into the design of a new type of LNG vessel that would be referred
to as Energy Bridge Floating Storage Regasification Unit (“FSRU”). As of 2013, Excelerate operates a fleet of eight
purpose-built FSRUs, three with an LNG cargo capacity of 138,000m³ and five with a capacity of 150,900m³.
Excelerate has also taken the conventional LNG carrier (“LNGC”) Excalibur under long term charter to support our
global efforts and is currently developing the largest FSRU in the industry for Petrobras in Guanabara Bay,
expected to enter into service May 2014. This FSRU will have storage capacity of 173,400m3 and installed
regasification capacity of 24 MMSm3/day.
Figure 1: Excelerate Presence
Since taking delivery of the first FSRU in January 2005, Excelerate has been at the forefront of technical innovation
in the LNG industry, achieving several ‘World Firsts’ in the process. These include Excelerate being the first
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company in the world to design, build, and operate offshore and dockside LNG regasification terminals
(Gateways™ and GasPorts® respectively). In addition, Excelerate was the first to utilize its own fleet of LNG
regasification vessels to service these facilities, and the first in the industry in developing STS LNG transfer
capabilities to maximize the efficiency of our fleet.
Figure 2: Company History
Excelerate developed, owns and operates one offshore LNG regasification terminal, Northeast Gateway® (NEG)
Deepwater Port in Massachusetts, as well as the Teesside GasPort (TGP) dockside regasification terminal at
Teesside in the UK. Internationally, Excelerate developed, operates, and provides LNG storage and regasification
services at three GasPorts, the Bahia Blanca (BBGP) and GNL Escobar (GNLE) GasPorts in Argentina and at the Mina
Al Ahmadi GasPort (MAAGP) in Kuwait; additionally Excelerate is also providing floating storage and regasification
service off the coast of Israel in a Gateway type facility.
In the course of developing and operating these terminals, Excelerate has amassed a highly experienced group of
project management and operations professionals to design, permit, construct, commission, and operate the port
facilities and associated vessels. Excelerate brings this experience, as well as excellent long standing relationships
with critical equipment manufacturers, design consultants, installation contractors, and operations and
maintenance contractors to each project we develop.
With eight FSRUs currently in service and one under construction, Excelerate is the unquestioned world leader in
floating offshore and dockside regasification solutions. This, in conjunction with unique design, construction and
operational experience derived from the completion of six such facilities worldwide, leaves Excelerate uniquely
suited to manage the challenges involved with the timely implementation and safe, efficient operation of LNG
importation infrastructure. Furthermore, Excelerate’s global reputation for utilizing available local resources in the
development of our terminals will allow the seamless integration of many qualified local businesses and personnel.
“Israel’s First LNG Importation
Facility” Hadera Gateway
Commissioned
“World’s First Commercial
LNG Ship-to-Ship Transfer”
February 2007
“World’s First Regas Vessel”
Excelsior Delivered
January 2005
ExcelerateEnergy
Formed
July 2003
“First LNG Facility on the US East Coast in 30
Years” Northeast Gateway Commissioned
May 2008
“World’s First Deepwater LNG
Port” Gulf Gateway
Commissioned
March 2005
“100th Ship-to-Ship Transfer of LNG”
Over 12,600,000 m3
of LNG transferred
April 2011
“World’s First At-the-Dock
LNG STS Transfer”Bahía Blanca
GasPort
June 2008
“Middle East’s First LNG Importation Facility”
Mina Al Ahmadi GasPort
Commissioned
August 2009
“Argentina’s Second LNG Importation
Facility” Escobar GasPort Commissioned
June 2011
“World’s Largest FSRU”
VT3*Contract Executed
August 2011
“South America’s First LNG Import Facility”
Bahía BlancaGasPort Commissioned
June 2008
“World’s First GasPort”
Teesside GasPortCompleted
February 2007
“15-year FSRU / FSU for Emirates
LNG”Abu Dhabi*
Contract Awarded
December 2012 January2013
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1.2 Excelerate Past Project Details
Excelerate has developed eight LNG regasification vessels, six floating LNG importation terminals and currently has
one new project specific vessel under construction. Each of these unique projects include mooring systems,
transfer systems, pipelines and receiving facilities as part of the project. An overview of each of these projects is
described in the following pages:
Project Energy Bridge Regasification Vessels
Excelerate developed and has taken delivery of eight new build FSRUs. Excelerate’s
FSRUs operate across the world to facilitate our trading activities. In addition,
Excelerate provides LNG storage and regasification services for third parties utilizing
the FSRUs currently operating in its fleet.
Contract Type (Lump Sum
Design and Build,
others...)
Lump sum
Scope of Work As the owner of the project Excelerate was directly responsible for the execution of
the project.
Work Site(s) Daewoo Shipbuilding & Marine Engineering
Geoje Island
Okpo, South Korea
Award Value The eight vessels were ordered at different times and therefore the values of the
contracts differ. Typical contract values were between US$250 million and US$300
million.
Procurement Value As above
Total Storage Capacity Three (3)Vessels – 138,000m3; Five (5) Vessels – 151,000m
3
Award Date Various dates between 2003 and 2008
Project Duration in Years Various, typically 2 to 3 years.
Progress Percentage of
Work and Cost (for on
going project)
No ongoing vessel contracts. Excelerate took delivery of its eighth FSRU in September
2010.
Completion date Various dates between 2005 and 2010.
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Figure 3: FSRU Excelsior
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Project Gulf Gateway Energy Bridge – Gulf of Mexico
GGEB was located 116 miles offshore Louisiana in the Gulf of Mexico, and developed
by Excelerate for its own trading activities. GGEB was owned by Excelerate and
provided the company with access to the highly liquid Henry Hub Market.
Contract Type (Lump Sum
Design and Build,
others...)
Project consisted of multiple design, fabrication and installation contracts all managed
by Excelerate.
Scope of Work GGEB consisted of a submerged turret loading (STL) buoy, provided by Advanced
Production and Loading, and a metering platform that provided connection to
multiple downstream pipelines.
As the owner of the project, Excelerate was directly responsible for the execution of
the project. Excelerate acted as the project manager from the concept through FEED
stage and directly contracted for all outside engineering, detail design, fabrication and
logistics services. Additionally, Excelerate’s project group undertook all procurement
of Owners Furnished Equipment, contracted for all offshore installation services, and
directly managed all aspects from concept to commissioning.
Work Site(s) Various fabrication sites. Installation site in Gulf of Mexico, USA
Award Value US$80 million
Procurement Value US$80 million
Total Project Man-hours 215,000
Award Date October 2003 (Concept development), October 2004 (Construction commenced)
Project Duration in
Months 24 months
In-service date/Status March 2005/ Decommissioned Spring 2012
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Project Northeast Gateway – Massachusetts Bay, Boston, USA
NEG located 13 miles offshore Boston, USA, was developed by Excelerate for its own
trading activities. NEG is owned by Excelerate and provides the company with access
to the Northeast US markets.
Contract Type (Lump Sum
Design and Build,
others...)
Project consisted of multiple design, fabrication and installation contracts all managed
by Excelerate.
Scope of Work NEG consists of two STL buoys and approximately 16 miles of subsea pipeline
connecting into the existing HubLine pipeline.
As the owner of the project, Excelerate was directly responsible for the execution of
the project. Excelerate acted as the project manager from the concept through FEED
stage and directly contracted for all outside engineering, detail design, fabrication and
logistics services. Additionally, Excelerate’s project group undertook all procurement
of Owners Furnished Equipment, contracted for all offshore installation services, and
directly managed all aspects from concept to commissioning. Excelerate currently
manages, operates and maintains the facility and utilizes its FSRUs to supply gas at the
facility.
Work Site(s) Various fabrication sites. Installation site in Massachusetts Bay, USA
Award Value US$210 million
Procurement Value US$210 million
Total Project Man-hours 420,000
Award Date September 2006 (Concept development), June 2007 (Construction commenced)
Project Duration in
Months 24 months
In-service date/Status December 2007/Active
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Project Teesside GasPort – Teesside, UK
TGP is in northeast England and was developed by Excelerate for its own trading
activities. TGP is owned by Excelerate and provides the company with access to the
UK NBP market.
Contract Type (Lump Sum
Design and Build,
others...)
Project consisted of multiple design, fabrication and installation contracts all managed
by Excelerate..
Scope of Work TGP includes a jetty-mounted articulated high pressure gas offloading arm, an onshore
metering system and a nitrogen injection facility. The scope of work included the
upgrading and modification of an existing jetty to allow GasPort operations.
As the owner of the project, Excelerate acted as the project manager from the concept
through FEED stage and directly contracted for all outside engineering, detail design,
fabrication and logistics services relating to the jetty, onshore receiving facility and
onshore pipeline. In addition to the above, Excelerate’s project group undertook all
procurement of Owners Furnished Equipment, contracted for all offshore installation
services, and directly managed all aspects from concept to commissioning. Excelerate
currently manages, operates and maintains the facility and utilizes its FSRUs to supply
gas at the facility.
Work Site(s) Various fabrication sites. Installation site in Teesside, UK
Award Value US$90 million
Procurement Value US$90 million
Total Project Man-hours 150,000
Award Date February 2006 (Concept development), August 2006 (Construction commenced)
Project Duration in
Months 12 months
In-service date/Status Feb 2007/Active
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Figure 4: Teesside GasPort
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Project Bahia Blanca GasPort – Bahia Blanca, Argentina
Client: Repsol-YPF
Contract Type (Lump Sum
Design and Build,
others...)
Owner’s Engineer
LNG Storage and Regasification Services
Scope of Work As the project developer, Excelerate was responsible for concept development,
engineering, procurement, construction and commissioning of the facility and directly
contracted for all outside engineering, detail design, fabrication and logistics services.
Excelerate currently provides management services at the facility.
Excelerate’s responsibilities included the floating terminal, onshore receiving facility
and onshore pipeline engineering, design, procurement, construction and
commissioning. Excelerate contracted with Mouchel Parkman for the engineering and
design of the onshore facilities. The Installation and construction was completed by
Repsol-YPF.
Excelerate utilizes its FSRUs to provide LNG storage and regasification services at the
terminal.
Work Site(s) Various fabrication sites. Installation site at Bahia Blanca, Argentina
Award Value US$35 million (Does not include LNG storage and regasification costs)
Procurement Value US$35 million (Does not include LNG storage and regasification costs)
Total Project Man-hours 45,000
Award Date March 2008 (Contract Award), June 2007 (Concept Development)
Project Duration in
Months
11 months
In-service date/Status May 2008/Active
Customer contact Information
David Tezanos Macacha Guemes 515, piso 24 Puerto Madero, Buenos Aires C1106BKK, Argentina Telephone Number : +54 11 5441 3964
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Figure 5: Bahia Blanca
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Project Mina Al Ahmadi GasPort – Mina Al Ahmadi, Kuwait
Client: Kuwait National Petroleum Company
Contract Type (Lump Sum
Design and Build,
others...)
Excelerate acted as the EPC contractor for the project. All EPC costs from
subcontractors were passed through to the client on a cost plus basis.
Scope of Work As the EPC contractor for the project, Excelerate was responsible for all engineering,
procurement, construction, commissioning and project management activities.
Excelerate managed all outside engineering, detail design, fabrication, and logistics
services through its subcontractors. Excelerate directed all aspects of the project from
conceptual design, detailed design, mechanical, Civil, and E&I construction, through to
commissioning. Excelerate currently operates the facility.
Excelerate’s responsibilities included the floating terminal, onshore receiving facility
and onshore pipeline engineering, design, procurement, construction and
commissioning. Excelerate contracted with Mouchel Parkman and Hyundai for the
engineering and design of the onshore facilities. Installation and construction
contractors included Hyundai and H.O.T Contractors.
Excelerate utilizes its FSRUs to provide LNG storage and regasification services at the
terminal.
Work Site(s) Various fabrication sites. Installation site at Mina Al Ahmadi, Kuwait
Award Value US$240 million (Does not include LNG storage and regasification costs)
Procurement Value US$240 million (Does not include LNG storage and regasification costs)
Total Project Man-hours 3,300,000
Award Date March 2008 (Contract Award), August 2007 (Concept Development)
Project Duration in
Months
24 months
In-service date/Status August 2009/Active
Customer Contact
Information
Hatem AI-Awadhi, Deputy Managing Director – Projects Kuwait National Petroleum Company P.O. Box 69, Safat 13001, Kuwait Telephone Number : +965 3260003
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Figure 6: Mina Al Ahmadi GasPort – Mina Al Ahmadi, Kuwait
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Project GNL GasPort – Escobar, Argentina Client: Repsol-YPF
Contract Type (Lump Sum Design and Build, others...)
Owner’s Engineer LNG Storage and Regasification Services
Scope of Work As the project developer, Excelerate was responsible for concept development, engineering, procurement, construction and commissioning of the facility and directly contracted for all outside engineering, detail design, fabrication and logistics services. Excelerate currently provides management services at the facility. Excelerate’s responsibilities included the floating terminal, onshore receiving facility, design, procurement, construction and commissioning. Excelerate contracted with Technica for the engineering and design of the onshore facilities. The Installation and construction was completed by Repsol-YPF. Excelerate utilizes the FSRU Exemplar to provide LNG storage and regasification services at the terminal.
Work Site(s) Various fabrication sites. Installation site at Escobar, Argentina
Award Date September 2010 (Term Sheet Execution)
Project Duration in Months
10 months
In-service date/Status June 2011/Active
Customer Contact Information
David Tezanos Macacha Guemes 515, piso 24 Puerto Madero, Buenos Aires C1106BKK, Argentina Telephone Number : +54 11 5441 3964
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Figure 7: Escobar GasPort
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Project Aguirre GasPort – Puerto Rico
Client: Puerto Rico Electric Power Authority (PREPA)
Contract Type (Lump Sum
Design and Build, others...)
Project involves the development of a fully integrated LNG storage and regasification
terminal comprised of an existing FSRU from Excelerate’s fleet along with fixed
infrastructure. Excelerate will act as EPC contractor for the project with all EPC costs
from subcontractors being passed through to the client on a cost plus basis.
Scope of Work
As the EPC contractor for the project, Excelerate is responsible for all FERC permitting,
engineering, procurement, construction, commissioning and project management
activities. Excelerate manages all outside engineering, detail design, fabrication, and
logistics services through its subcontractors. Excelerate directs all aspects of the
project from conceptual design, detailed design, mechanical, Civil, and E&I
construction, through to commissioning.
Excelerate’s responsibilities include the FSRU, offshore terminal, pipeline, onshore
receiving facility, and integration with the existing power plant. Excelerate will
manage all design, procurement, construction, installation and commissioning.
Excelerate has contracted with Technica for the engineering and design of the onshore
facilities with installation and construction contractors to be selected upon receipt of
construction permits from the Federal Energy Regulatory Commission (FERC).
Excelerate will utilize an FSRU from its existing fleet to provide LNG storage and
regasification services at the terminal.
Work Site(s) Offshore Aguirre, Puerto Rico
Award Value Contract Value - $450MM (FSRU and Infrastructure)
Procurement Value $174MM (Excluding FSRU)
Total Storage Capacity 151,000 m3
Award Date March 2010
Project Duration in Months Regulatory – 24 months, Construction 12 months
Completion date 3rd
Q 2014
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Figure 8: Rendering of Proposed Aguirre GasPort
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Project VT3
Excelerate is building the world’s premier floating regasification project for Petrobras
Gas & Energia (Brazil), which includes the construction of the first project specific LNG
FSRU newbuild. The vessel will have the largest LNG capacity in the industry at
173,400m3 and the highest peak regasification capability at 24mil m
3/day.
Contract Type (Lump Sum
Design and Build,
others...)
Lump sum
Scope of Work Excelerate is directly responsible for the execution of the project. However, since the
vessel is being built for a specific project, collaboration with counterparty is occuring
on a regular basis.
Work Site(s) Daewoo Shipbuilding & Marine Engineering
Geoje Island
Okpo, South Korea
Award Value Contract value US$280 - $300 million
Procurement Value As above
Total Storage Capacity 173,400m3
Award Date August 2011
Project Duration in
Months
33 months
Progress Percentage of
Work and Cost (for on
going project)
Currently in construction phase, launched on May 11 2013 and scheduled delivery in
March 2014. Excelerate is currently providing floating storage and regasification
services in Petrobras Guanabara Terminal with the Exquisite until the VT3 is delivered
(Figure 9).
Completion date May 2014 in Guanabara, Brazil
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Figure 9: Exquisite and Excelsior at the Guanabara Terminal
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1.3 Operating Experience
1.3.1 Ship to Ship Transfer
Excelerate pioneered the commercial use of STS transfer of LNG from conventional transport vessels to FSRUs
acting as terminals. In more than 7 years of operations, Excelerate has transferred more than 500 LNG cargoes
consisting of almost 58 million cubic meters of LNG safely, efficiently, and without incident. The specially
developed STS transfer equipment and procedures employed by Excelerate have been instrumental in maintaining
this standard of excellence and safety. Until recently, Excelerate was the only company in the world utilizing
double-banked STS commercially. This pioneering approach has now led to an industry accepted operation that
others are now independently performing. Double banking, or side-by-side, in its simple terms is two ships
alongside each other separated by mooring fenders which can vary in number and size depending upon ship size
and weather conditions. Both vessels share in providing mooring lines the configuration of which is dependent
upon ship size, mooring layout and weather. Double banking can be used alongside a dock or even in open water.
This capability is an efficient, cost effective operation for either an offshore terminal, Gateway, or a GasPort
facility.
The STS System is capable of transferring up to 1,000 m3/hr per line on each of six liquid lines, and two vapor lines
to manage vapor transfer between the two vessels involved in the STS transfer. The maximum transfer rate of
6,000 m3/hr is the design rate of the system, due in part to the assumption two (2) cargo tanks with four (4) cargo
tank pumps in operation at 1,500 cubic meters per hour each. The transfer rate has proven to be the most optimal
rate while maintaining a safety margin to manage tank pressures and management of the BOG generated.
Industry Approval – Excelerate stands apart from others in the floating regasification market. It is the number of
global LNG companies that have worked with Excelerate and have vetted and approved Excelerate‘s operations
and performance that makes Excelerate the leading floating regasification provider in the world. The following LNG
shippers and suppliers have vetted and approved Excelerate’s STS operations for their vessels.1
Approved by Shippers, Suppliers and Industry Organizations BP Maersk QatarGas *
ConocoPhillips MOL Repsol
Dynagas Morgan Stanley SIGTTO
El Cano NLNG Statoil
GDF Suez OCIMF Teekay
Golar Osaka Gas / NYK* Trafigura
K-Line Petrobras Vitol
Knutsen Petronas
*Currently undergoing due diligence review process
Table 1: Shippers, Suppliers and Industry Organizations Approval
___________________________ 1 It is the shipping companies/owners that must approve the STS operations, not the LNG suppliers. Some major LNG suppliers do have their
own vessels as part of their LNG fleet portfolio, however some LNG suppliers only charter in tonnage, hence not included on the list.
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The table below highlights the number of operations and volumes of LNG transferred, as well as the number of
third party vessels that have participated in STS transfer operations with Excelerate as the operator of the transfer.
This operational experience is simply unmatched within the industry.
Table 2 - STS Summary
1.3.2 Terminal/Vessel Operations
Excelerate maintains procedures for the operation and maintenance of its facilities. These procedures are designed
to assure the effective conduct of operations as well as to assure reliability and availability of our assets.
In terms of the Quality and Environmental Management Systems applicable for regasification vessel operations,
Excelerate’s existing regasification vessels are operated in partnership with Exmar Shipmanagement. Exmar
Shipmanagement’s Quality Management System has been certified by Det Norske Veritas (“DNV”) as conforming
to ISO 9001 standards, and currently implements an Environmental Management System to ISO 14001 standards.
Additionally, Exmar Shipmanagement’s Safety Management System has been certified by DNV as complying with
the requirements of the International Management Code for the Safe Operation of Ships and for Pollution
Prevention (ISM code).
STS - Summary as of: 12/27/13
Operation Count Total (CuM)
Open Water 15 1,624,521
Gas In / Cool Down 3 25,572
In Port
Double Banking 302 28,866,360
Tandem - Along Dock 142 18,791,668
Across Dock 74 7,787,216
Total 536 57,095,338
Operator Count Total (CuM)
EE Vessels 79 7,981,615
3rd Party Vessels 457 49,113,722
Total 536 57,095,338
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2.0 FSRU TECHNICAL CHARACTERISTICS
2.1 FSRU Fleet Characteristics
Excelerate operates a fleet of eight new, specially designed, and purpose built FSRUs: Excelsior, Excellence,
Excelerate, Explorer, Express; Exemplar; Expedient; and Exquisite. These FSRUs have the following Classification:
Bureau Veritas (BV nb: 03161N) I + HULL + MACH, liquefied gas carrier / LNG-RV (membrane tank 0.25 bar, -163C,
500 kg/m3), Unrestricted navigation, + AUT-UMS, + SYS-NEQ-1, MON-SHAFT, + VeriSTAR-HULL 40 years, STL-SPM,
IN WATER SURVEY.
Table 3 - Vessel’s Characteristics
Vessels Characteristics 138,000m3
FSRU 150,900m3 FSRU
LOA (Length Overall) 277.00 m 291.00 m
LBP (Length Between Perpendiculars) 266.00 m 280.00 m
Beam 43.40 m 43.40 m
Depth Molded 26.00 m 26.00 m
Summer Draft 12.32 m 12.40 m
Design Draft 11.52 m 11.60 m
Summer Deadweight 77,263 MT 83,163 MT
Light Ship 31,546 MT 34,189 MT
GRT (Gross Rated Weight) 93,901 MT 100,361 MT
NRT (Net Rated Weight) 28,170 MT 30,108 MT
KTM (Keel to Mast) 54.16 m 54.10 m
100% Cargo tanks volume 138,101 m3 150,990 m
3
98.5% Cargo tank volume 136,003 m3 148,725 m
3
Bow Thrusters 2 x 4079 BHP 2 x 4077 BHP
Stern Thrusters 1 x 2719 BHP 1 x 2717 BHP
Main Engine NCR 32400 BHP at 85 RPM NCR 32400 BHP at 85 RPM
Main Boilers 2 x 71 TPH 2 x 71 TPH
Aux Boiler for regasification NONE 1 x 50 TPH
HP Regasification Connections 1 x Port and 1 x STBD Upper Deck, and 1 x STL (Submerged Turret Loading).
1 x Port and 1 x STBD Upper Deck, and 1 x STL (Submerged Turret Loading).
Nominal Regasification capacity in Open Loop 500 MMSCFD 500 MMSCFD
Nominal Regasification capacity in Closed Loop 450 MMSCFD 500 MMSCFD
Peak Regasification capacity in Open Loop with heating water greater than 15.5
0C
690 MMSCFD 690 MMSCFD
Ramp up/down MMSCFD/hr 100 MMSCFD/hr 100 MMSCFD/hr
High Pressure Pumps for regasification 6 x 205 m3/hr + 2 x 20 m
3/hr 6 x 205 m
3/hr + 2 x 20 m
3/hr
Main cargo pumps 8 x 1700 m3/hr 8 x 1700 m
3/hr
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For further details, Gas Form C and the General Arrangement plans for the Excellence and Explorer are included as
Appendices 1-4 to this document.
2.2 LNG Containment System
The cargo containment system for Excelerate’s FSRUs is a strengthened version of the Gaz Transport Technigaz’s
(GTT) NO96 membrane Cargo Containment System.
The membrane cargo containment system includes two membrane barriers to ensure cargo integrity in the event
of leakage of the primary barrier. The GTT type NO 96 system is fitted to most of the existing membrane type
ships. The primary and secondary barriers are identical, which provides 100% redundancy. These layers are
constructed of a 0.7 mm thick invar skin and a layer of perlite-filled structural boxes that act as insulation. Invar is
a stainless steel alloy of 36% nickel and is chosen for the membrane, as it has a negligible coefficient of thermal
expansion.
2.3 Description of Vaporizers and Regasification System
2.3.1 Vaporization Modes
The FSRU is capable of three (3) modes of LNG vaporization, closed-loop, open-loop, and combined mode. In the
closed-loop mode, steam from the FSRU regasification steam boilers is used to heat fresh water circulated through
the shell-and-tube vaporizers to regasify the LNG. There is no seawater intake or discharge used specifically for
the regasification process in the closed-loop mode. In open-loop mode, the basic process is much the same as
closed loop, with the exception that warm ambient seawater is drawn in through the FSRU’s sea chests and
circulated directly through the vaporizers eliminating the need to heat the circulating water.
In open loop mode, this seawater is used as a heat source and passes through the shell of the vaporizers. LNG is
fed through the tubes of the vaporizer where it contacts the inner surface of the tubes and the heat required for
vaporization is transferred. The temperature of the seawater is lowered in this process by approximately 9.5
degrees Centigrade maximum, and this cooler water is discharged overboard the FSRU. For this reason, the FSRU
is constrained from operating in the Open-Loop mode when water temperatures are below 14.7 degrees
Centigrade to minimize the risk of icing within the vaporizers. In Combined Mode, seawater at temperatures
between 7 and 14.7 degrees Centigrade can be used and the sea water is further heated using steam from the
FSRU’s boilers to provide sufficient heat for the vaporization of the LNG. Closed-loop mode is used whenever the
seawater temperature is below 7 degrees Centigrade.
2.3.2 LNG Regasification Process
The regasification system comprises a suction drum, high-pressure (HP) pumps, HP vaporizers, metering system,
discharge manifold with associated low and high pressure pipe work and valves. LNG is stored in the cargo tanks
at a pressure slightly above atmospheric, and is pumped by low pressure (LP) feed pumps to the suction drum
which serves as an accumulator and surge vessel for the HP LNG pumps.
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Figure 10 - FSRU Regasification Process Schematic
From the suction drum, the liquid pressure to the vaporizers is increased by the HP pumps. The regasification
system includes two Small High Pressure (SHP) pumps. The SHP pumps, with a capacity of approximately 20 m3/hr,
are used for pressurization of the system during start up and may be used for continuous discharge during very low
discharge flow requirements. These pumps increase the system pressure gradually during start up without
excessive generation of boil off gas. Once a regasification flow rate of 10 mmcfd (11,800 sm3/h) has been
achieved, the LNG vaporizer outlet control valves are set to control the vaporization process at a pressure of not
less than 75 barg.
A single HP pump is utilized to increase the LNG flow rate to the minimum operating flow rate of 50 mmcfd
(59,000 sm3/h). The flow rate can then be increased up to 100 mmcfd (118,000 sm
3/h) with a single pump. Flow
rates up to the contractual flow rate can be met by progressively starting additional vaporizer and HP pump
streams. The HP pump raises the pressure of the LNG to match the export pipeline pressure (75 to 100 barg) and
sends the cold LNG to the LNG Vaporizer. There are six 205 m3/h capacity HP pumps on an FSRU. Five pumps are
utilized to deliver gas at a rate of 500 mmcfd. Therefore, there is sufficient spare capacity on the FSRU to ensure
high availability and reliability of the terminal. The sixth pump is used for peak (120%) capacity operation.
The FSRUs incorporate six LNG vaporizers. The vaporizer is a shell-and-tube heat exchanger where the LNG is
vaporized to natural gas and heated to approximately 1° C (35° F) minimum by the seawater (open loop) or by the
vessels internal heating system (closed loop). The normal natural gas flow rate through the vaporizer is between
50 and 100 mmcfd (59,000 and 118,000 sm3/h), with a maximum flow rate of 119 mmcfd (135,700 sm
3/h). The
temperature and pressure are measured at each vaporizer outlet line in order to calculate the re-gas flow rate
using the recorded actual pressure drop at a flow measuring orifice. The signal is then sent to each vaporizer flow
controller.
On leaving the LNG Vaporizer, natural gas flows through a Pressure Regulating Station that maintains a minimum
pressure of approximately 75 barg in the regasification system, through a metering station and into the export
pipeline and finally either through the STL connection or one of two HP Arm connections.
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2.3.3 High Pressure Gas Delivery
2.3.3.1 High Pressure Gas Connections
Each of Excelerate’s FSRUs is fitted with two 12” High Pressure gas connections for delivery of high pressure gas.
One is fitted port and the other starboard. These manifolds are located approximately 30 meters from the
centreline of the LNG loading/unloading manifold. Upstream of each manifold connection is an ESD valve.
Figure 11 - FSRU High Pressure Gas Manifold
2.3.3.2 Submerged Turret Unloading Compartment
Each of Excelerate’s FSRUs is also fitted with the capability to delivery high pressure gas through a submerged
turret offloading system. The submerged turret compartment on board the FSRU is in way of the forward end of
the vessel. All associated connection/disconnection, pull in, mooring connection, gas delivery, control, safety, and
utility system are part of the FSRU’s design.
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Figure 12 - FSRU STL Compartment and Equipment
2.3.4 Operation and Control of the Regasification System
The regasification and gas delivery operation is continuously manned and controlled utilizing the Integrated
Automation System (IAS). The regasification system is protected by utilizing a designed system that incorporates
high pressure trips, low temperature trips, and relief valves. The FSRU Emergency Shut Down (ESD) system will
activate to shut down the regasification process in the event a ship or shore side ESD condition is present. The
FSRU’s IAS ensures the safe operation of the regasification plant within the system design parameters.
For each regasification nomination or change in nomination, the FSRU operator will utilize the IAS configuration
screen to input the correct flow required rate ensuring the nomination is achieved by the end of the gas day.
Additional vaporizer capacity may be started / stopped to achieve the required rate.
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Figure 13: High Pressure LNG Pumps Figure 14: Shell and Tube Vaporizer
2.3.5 Baseload Regasification Rates
The FSRU capabilities will be able to provide regasification baseload rates up to 500 mmscfd in open loop mode
depending on downstream pipeline entry requirements at a pressure of up to 100 barg. The FSRU will have six (6)
independent LNG vaporizers and associated high pressure pumps. Each of these trains is rated for a nominal send-
out capacity of 100 mmscfd, providing a high level of redundancy for this project.
2.3.6 Delivery Rates during LNG Loading Normal Operations
The FSRU can operate in continuous send-out at maximum rates whether or not there is an LNGC delivering an
LNG cargo. The unloading of an LNGC does not impact the FSRU or terminal deliverability; therefore, the facility
does not need to reduce its send-out rate.
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2.4 Boil-Off Gas (“BOG”) Overview
2.4.1 BOG Rate
The expected natural BOG rate during FSRU normal operation is expected to be as designed for the membrane
tank containment system at 0.155% per day of the total volume of the cargo tanks containing LNG at the time.
However, this does not mean that at all times during the operation of the FSRU BOG will only be 0.155%, because
during the LNG transfer operation the BOG rate will increase and vary significantly over a given cargo based on the
saturation vapor pressure and liquid temperature of the cargo transferred, the environmental conditions and rate
of transfer. The BOG is consumed in the boilers to power the regasification plant and vessel.
The FSRU does not require fuel oil as long as the vessel has LNG onboard to use for power production through
consumption of natural and forced BOG. If the FSRU does not have sufficient LNG onboard beyond any heel
retention that may be required, it consumes around 40 metric tons of fuel oil per day. Heel is the minimum
quantity of LNG retained in an LNG vessel after unloading at the facility to maintain temperature, pressure, and/or
prudent operations. Generally a quantity of LNG less than 5% of the vessels capacity is presumed to be heel.
2.4.2 BOG Management
When operating in closed loop mode at send-out rates in excess of approximately 200 mmscfd any BOG generated
onboard is used as fuel gas for the vaporization system and therefore there is no excess BOG. The optimal BOG
recovery and management system required for the terminal is dependent on the operating profile of the terminal
(base-load, peaking, seasonal).
BOG arising from the transfer of LNG will be managed by both the FSRU and the LNGC with vapor being returned
at flow rates up to 12,000 kg/h to the LNGC via flexible cryogenic hoses.
2.4.3 BOG Generation/Consumption
By design, in open loop mode and at rates above approximately 200 mmscfd, fuel consumption is equivalent to
approximately 2% of send-out. In close loop mode and at rates above 200 mmscfd the fuel consumption is
equivalent to approximately 3.5% of send-out. In practice, Excelerate can operate the vessels even more efficiently
and fuel consumption rates can be lower than outlined above. Fuel consumption is dependent on a number of
factors including operational conditions, temperature of the LNG received, mode of operation, send-out rates, etc.
At delivery of 200 mmscfd and above efficiency is highest and the proportion of fuel used as a percentage of send-
out is lowest.
For lower than 200 mmscfd send-out rates, a BOG Compressor System would help the project be more fuel
efficient by recovering all the gas that is not used for power generation, compressing and delivering it to the
downstream gas pipeline accordingly.
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2.5 Expected Hull Maintenance Intervals
The FSRUs, as presently classed, require dry-docking every 5 years, and annual maintenance requirements are
similar to a land based facility.
As an alternative, it is possible to add an additional Class note to the FSRUs that would allow them extended
periods of stationary service (10 to 20 years) without the need for dry-docking. The implementation of this
additional Class note can be elected upon award and the finalization of terminal requirements.
2.6 Anticipated FSRU Availability
Actual realized overall availability for Excelerate’s FSRUs at the operational ports of BBGP (Bahia Blanca GasPort),
MAAGP (Mina Al Ahmadi GasPort), GNL ESCOBAR, and Guanabara Bay is shown in the following table:
Gasport Year Availability
Bahía Blanca GasPort, Argentina 2012 99.61%
2013 99.48%
GNL Escobar GasPort, Argentina 2012 99.40%
2013 100.12%
Mina Al-ahmadi GasPort, Kuwait 2012 100.60%
2013 100.80%
Guanabara Bay, Rio de Janeiro, Brazil 2012 100.64%
2013 99.19%
Table 4: Availability
Availability is calculated as follows:
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3.0 PROJECT BACKGROUND
3.1 Walvis Bay FSRU Project
Xaris, based in Australia, is a leading independent power producer developing infrastructure power solutions
throughout Africa. Xaris is interested in developing a new 200MW gas fired power plant in Walvis Bay, Namibia.
The project is being developed in close cooperation with Namibian Power Utility (“NamPower”).
Natural gas will be imported as LNG and regasified for usage by the FSRU, providing a more efficient and
competitive LNG import solution to the project. The purpose of this document is for Excelerate to determine on a
preliminary basis the feasibility of utilizing an Excelerate’s FSRU in Walvis Bay.
In order for Excelerate to properly evaluate this opportunity, Excelerate will have to rely on various input
information such as the location’s marine access, bathymetric information of the site, metocean data and
preliminary general layout of the marine terminal. In the event that the input information changes as the project
progresses, there may be a corresponding effect on the results of Excelerate’s evaluation.
The final configuration of the Walvis Bay LNG Import Terminal will be determined by Xaris with due consideration
of Excelerate’s recommendations.
The natural gas quality specification has a direct impact on additional processing facilities required on the LNG
Import Terminal or immediately downstream but prior to the delivery point. The effects of the natural gas
composition required for entry into the pipeline system will be determined during the detailed design phase of the
project.
3.2 Site Access and Location Overview
The required marine facilities could be developed (EPC) by Excelerate if required; the infrastructure should be
designed compatible with Excelerate’s existing FSRU sizes as described in the Gas Forms C provided as appendices.
The most up-to-date bathymetric, metocean, geophysical and geotechnical information needs to be analyzed in
order to evaluate the feasibility of placing an FSRU at Walvis Bay as tentatively proposed by Xaris and Namibian
Ports Authorities.
In order to maximize the LNG intake capacity of the incoming vessels, it is recommended that entrance channel, the berthing pocket as well as the turning basin should have a minimum MLLW (mean lower low water) depth requirement of 14m in order to allow Excelerate’s FSRU operations throughout the navigational and turning areas of the port. The suggested site is within the Walvis Bay in proximity to the existing port entrance ship channel (see Figure 15).
There might be a need to slightly dredge the berthing pockets and turning circles with enough draft for the FSRU
and the LNGC. A subsea gas pipeline would be installed between the FSRU and shore. The main criteria for the
selection of the site are water depth (to minimize any dredging requirements), proximity to the ship channel, and
proximity to the harbor. The type of facility will also dictate what would be the preferred site for an FSRU in Walvis
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Bay. Also, proper geotechnical studies of the area will have to be performed to better determine the estimated
cost of such port facilities and the associated gas pipeline.
Figure 15 - Tentative FSRU Site Location in Walvis Bay, Namibia
FSRU Tentative Site
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Figure 16 illustrates a size proportion of the FSRU and an LNGC during a STS operation as well as the subsea gas
pipeline connecting the FSRU to the dual-fuel power plant.
Figure 16 - Tentative FSRU and LNGC Location (STS) and a Subsea Pipeline in Walvis Bay, Namibia
FSRU Tentative Site
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3.3 High Pressure Gas Delivery and LNG Transfer
The facility would employ a single FSRU on a continuous basis, and would provide approximately 3 or 3.2 billion
cubic feet (Bcf) of storage on either a 138,100 m3 or a 151,000 m
3 vessel. The FSRU would remain connected to
the GasPort in the Single Berth or Buoy configuration and function as a floating storage and regasification terminal
with conventional LNG carriers providing LNG supplies as needed. The LNG Terminal would be capable of providing
up to 500 mmcfd of regasified LNG in open loop.
Figure 17: Ship to Ship (STS) Tentative Layout
The design of the Single Berth/Double Banked facility (Figure 17) has a High Pressure Gas Arm on the berth to
accept gas from the Excelerate FSRU at the nominal send-out rate. Provided that the local weather and metocean
conditions allow a safe and reliable continuous STS LNG Transfer operation, the Double Banked terminal above will
be capable of receiving LNG via STS transfer through flexible cryogenic hoses while regasification operations
continue on the dock. Excelerate has pioneered the STS transfer of LNG, and can implement the transfer of LNG
cargos from a traditional LNGC to Excelerate’s FSRU utilizing this proprietary STS transfer process (Figure 18).
It is worth noting that Excelerate has an existing inventory of HP Arms, one of the key long-lead items, that enables
it to provide fast track solutions to Excelerate’s customers.
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Figure 18: STS LNG Transfer Equipment
The design of the APL Shallow Water Buoy system uses a buoy and flexible riser to convey natural gas from the
FSRU to the gas import pipeline via the PLEM. The ID of the riser will allow the FSRU to deliver the full peak
regasification capacity of the FSRU. Mooring of the FSRU is achieved by 8 evenly spread mooring lines anchored to
the ocean floor. Resupply of LNG to the FSRU will be achieved with the use of the same STS transfer system as
described above.
The design of the APL shallow water buoy system shown below (Figure 19) is comprised of the following
components:
Anchor
Mooring Line
Riser and Umbilical System
Pipeline End Manifold (PLEM)
STL Buoy
Figure 19: Shallow Water Buoy Configuration
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3.4 STS LNG Transfer and Flexible Cryogenic Hoses
The design anticipates the transfer of LNG from an LNGC to the FSRU at transfer rates up to 6,000 m3/h via flexible
cryogenic hoses, with BOG arising from the transfer of LNG, managed by both the FSRU and the LNGC. Specialized
8-inch cryogenic hoses are utilized to transfer the LNG between the FSRU and the LNGC.
3.5 Metocean conditions
Reliable Metocean data of Walvis Bay will have to be gathered in order to provide an accurate evaluation of the
proposed locations for the LNG Import Terminal. For STS LNG Transfer Operations the threshold for the LNG safely
staying moored to the FSRU is 2m wave height and 8s wave period.
Based on the metocean and bathymetric data provided, Excelerate will be able to effectively establish operational
parameters associated with LNG transfer at the selected location. Additionally, a review of existing marine support
infrastructure including tugs, pilots and support vessels will be required and performed in conjunction with the
port authorities.
3.6 Water Quality and Temperature
As mentioned above throughout this document, the minimum seawater temperature required to operate in open
loop without steam supplement is 14.7oC. Local regulation and the port authorities will determine the viability of
operating with this type of regasification mode. With regards to the quality of the seawater, further analysis will
have to be performed to confirm if the seawater quality at the site will be acceptable to use for the regasification
process onboard the FSRU.
If fresh water production onboard may not be possible due to unsuitable seawater quality, it would be necessary
that Xaris ensures that bunkering of both potable and distilled (boiler make-up) water is made available at the final
port location.
3.7 Local Permits and Regulations
Excelerate confirms that all its vessels comply with current international and classification society regulations.
Excelerate has of yet not undertaken a detailed review of Namibia’s permitting regime due to the timing of this
proposal. However, as part of any definitive agreements, Excelerate anticipates that the parties will follow market
requirements for this type of regasification projects with Xaris bearing responsibility to obtain and maintain all
local permits and licenses in Namibia necessary in order to operate Excelerate’s FSRU. Such permits and licenses
would include, but not be limited to the vessel’s flag waiver and temporary or permanent importation, as required
in Namibia. Excelerate will provide all necessary assistance and cooperation for the fulfillment of Xaris’ permitting
obligations.
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4.0 APPENDICES
I Gas Form C – Excellence II General Arrangement – Excellence III Gas Form C – Explorer IV General Arrangement – Explorer