TEMA LNG-FSRU PROJECT Why Ghana needs Gas(LNG) Demand for Gas in Ghana The demand for Gas in Ghana has been driven by the needs of Power Generation Companies which culminated in the construction of the West Africa Gas Pipeline. The discovery of Gas in the Jubilee Fields was expected to plug the national supply deficit hole. The contrary has been true as the country’s demand in the next decade will far out strip supply from both the West Africa Gas Pipe Line and Jubilee Fields at full production Table 1 below shows national demand of Gas for power generation and table 2 shows Industrial demand. Gas(LNG) Demand – Power Plants Owner Gas Quan/ty Plant MMscf/d Plants Ready for Gas Takoradi Thermal Power Plant (TAPCO) VRA 60 Takoradi InternaConal Power Company (TICO/ VRA 60 TAQA) Mines Reserve Plant (MRP) VRA 30 Tema Thermal 1 Power Plant (TT1PP) VRA 30 Sunon Asogli Power Plant (SAPL) IPP 35 Tema Thermal 2 Power Plant (TT2PP) VRA 15 Total Gas Required Immediately 230 Table 1 Source VRA Gas(LNG) Demand – Power Plants Owner Gas Quan/ty Plant MMscf/d Plants Under Construc4on Tema Osono Power Ltd (TOPL) IPP/VRA 30 Magellan Plant (T3) -‐ Takoradi VRA 30 Osagyefo Power Barge GoG 24 Total Gas for Plants under Construc4on 84 Plants Wai4ng to be Constructed VRA/JV 60 VRA_Alstom (Domini) IPP 60 Cen Power Plant IPP 90 Kumasi Power Plant Total Gas for Plants to be Constructed Table 1 Source VRA 210 GAS DEMAND FOR NON-POWER COMPANIES COMPANIES MMscf/d VALCO 0.705 COMPANIES MMscf/d Aluworks Gh. Ltd 0.621 Takoradi Industrial 15.0 Unilever 0.931 Tarkwa, Manganese 9.0 P Z Cussons, Ghana Ltd 0.152 Barry Callebaut 0.062 Nyinahin, Bauxite 46.0 Cocoa Processing 0.307 Buipe, Limestone 16.0 GTP Co. 0.641 Other Major CiCes 12.0 Pioneer Foods 0.310 TOTAL 98.0 Nestle, Ghana Ltd 0.455 Western Steel and Forging Ltd 0.513 Tema Steel Co 0.402 Ghana Paper PrinCng & Pkg 0.059 Super Paper Products 0.083 WAHOME 0.447 Tema TexCles 0.485 Gafco 0.421 Others/GTMC 0.462 Accra Area 0.863 TOTAL 7.980 Table 2 Source VRA The Project The Project involves the deployment of a Floating Storage Regasification Unit ( FSRU) off the Port of Tema to supply LNG to feed power plants and industry in the Tema Area The project is being undertaken by a diverse and experienced group including: § HML Marine Power & Energy Ltd § GOLAR § LEIGHTON § BLUEWATER WHY FSRU? Key Beneﬁts of an FSRU § FSRU is a more cost-effective way to meet low demand or to “grow into” LNG than traditional land based terminals § Flexible location selection § Can be relocated § Quicker to develop than land-based facilities § Cost competitive with land-based facilities § Suitable for location offshore § Improved navigational safety as LNG carriers stay offshore § Side-by-side ofﬂoading How FSRU WORKS Floating Storage and Regasification Unit (FSRU) is based on conversion of an existing LNG carrier. The FSRU is to be permanently moored offshore and export gas to shore through a sub sea pipeline. The vessel is permanently moored to the seabed with a turret mooring arrangement, and the gas send-out line is arranged through the turret down to the seabed and to shore via a seabed pipeline. The LNG tankers offloading to the floating terminal will be moored in a side-by side configuration. LNG is sent from the tanks to the regasification skid situated forward. The regasification skid essentially comprises booster pumps and steam heated vaporizers. The booster pumps will increase the pressure to about 90 bar, before the high pressure LNG is vaporized, after which the gas passes through a fiscal metering unit and is sent to the sub sea pipeline via the gas swivel and flexible risers. How FSRU WORKS An Example of the RegasiﬁcaCon Process Vessel § Name: Hoegh Gandria § Built: 1977 § Cargo Capacity: 127, 104 m3 § Mooring LocaCon: Oﬀshore § LNG Transfer: Side by Side § Mooring: Internal Turret § Status: Pending Conversion MOORING-‐ Turret Mooring Systems Internal Turrets Source: Bluewater Source: Golar LNG MOORING-‐ Turret Mooring Systems Internal Turrets The internal turret mooring system is Bluewater’s most frequently supplied turret mooring system. It can be used in medium and deep water applications. This type of mooring system is widely used on FPSOs, FSOs and FSRUs. Its design has been proven time and time again in the harshest North Sea conditions. Source: Bluewater MOORING-‐Internal Turrets Principal components: § Turret and spider § Anchor arrangement § Product transfer system § Turret casing § Turntable Turret and Turret Casing The mooring system consists of a (geo)static part, connected to the seabed, called the “turret” and a rotating part, integrated within the FSRU hull, called the “turret casing”. These two parts are connected via a bearing arrangement. This bearing arrangement allows the rotating and geostatic part of the system to rotate, thus allowing the FSRU to freely weathervane around the turret to a stable position such that the loads on the FSRU are Source: Bluewater minimal. MOORING-‐Internal Turrets Anchor Arrangement. An anchor arrangement is applied to connect the FSRU to the seabed. Dynamic behaviour calculations are made for each internal turret mooring system to predict the behaviour of the FSRU for various wind, wave, and current conditions. These calculations determine the optimal anchor leg arrangement, and the size of the various anchor leg components. Soil data at the site location will be examined, by Bluewater Geotechnical Engineers to determine type and size of anchors. Basic anchor leg components are: Anchors or piles, depending on the soil data, to connect the anchor legs to the seabed Anchor line (chain, steel wire, polyester rope or combination of these) Chain stoppers to connect the chain to the spider MOORING-‐Internal Turrets Product Transfer System The heart of each turret mooring system is the product transfer system. From or to a geostatic location, e.g. a Pipe Line End Manifold (PLEM), riser base which is fixed to the seabed, this system transfers product to the FSRU, weather vanning around the turret. The basic product transfer system components are: Flexible subsea hoses, generally referred to as “Risers” Swivel stack On board process piping Risers The risers connect the subsea piping to the FSRU. These risers are flexible hoses coming from the seabed or from a nearby loading tanker. The configuration of these risers can vary, depending on water-depth, sea state, FSRU motions, etc. MOORING-‐Internal Turrets Bluewater Engineers thoroughly determine FSRU motions caused by weather conditions, sea state and water depth in computer models in order to predict the dynamic behaviour of the risers and determine the optimal riser configuration. The design of the turret mooring system allows for the connection of over 50 risers and associated umbilicals, providing paths for gas and water as well as the associated paths for hydraulics, chemical injection, power, control and optical signals. Swivel Stack Since turret-mooring systems usually accommodate a large number of paths, these systems are equipped with a swivel stack rather than a single product swivel. This swivel stack is the connection between the geostatic risers and the FSRUs piping and is located above the turntable. LNG Transfer/Loading Side by Side Loading Source: Bluewater Source: Bluewater LocaCon Map -‐Landfall LocaCon Map –Mooring & Transfer LocaCon Map –Mooring & Transfer Partners Vessel Owners GOLAR LNG & Bluewater Golar is one of the world’s largest independent owners of LNG carriers. www.golarlng.com LNG Supplier Sonangol Gas will supply the LNG to the FSRU Financial & Transaction Advisors INVESTEC www.investec.com Partners Mooring and O&M BLUEWATER Bluewater is a leading technological company specializing in the design development lease and operation of Tanker Based Storage Systems and a leading provider of Mooring Technology. Bluewater will be responsible for the mooring, operation and management of the FSRU www.bluewater.com Project Developer HML Marine Energy & Power Ltd HML is a consultancy company providing a one stop solution to the oil gas and power sectors in West Africa www.hmlmpe.com Bluewater -‐ ExperCse Bluewater have been designing, installing and operating Turret Mooring Systems since 1993. Many of the world’s leading Operators employ Bluewater’s turret and swivel technology in their assets around the world, including the North Sea, Far East, South Africa and Brazil. Applications and operating challenges are broad and diverse, with water depths ranging from 70m to over 1000m and tankers from 26,000 to 280,000 (DWT). While each of Bluewater’s turret systems is individually adapted and tailored to specific project requirements. All Bluewater Turret Mooring systems incorporate innovative design, investment in research, development and years of operational feedback resulting in: § Low maintenance and high reliability § Safety and integrity of a passive design § Ease of accessibility § Designs that minimize loss of storage capacity but retain riser capacity § Structural designs focused on reduced fatigue and wear § Continuous improvement through the operational feedback and lessons learned from Bluewater operated FPSO turrets Examples of Vessels using the Bluewater Internal Mooring System. Source: Bluewater Contact Details. HML Marine Energy & Power Ltd 5 Clokey Walk, North Labone -‐ Accra. P.O.Box SR67, Spintex Road, Ghana. Email:email@example.com Phone:(+233) 26 5767 820 hkp://www.hmlmpe.com/ Appendix.
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