design concepts for lng fsry
TRANSCRIPT
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Design Concepts for LNG FSRU/FPSO withLNG FSRU/FPSO with IMO type C cargo tanks
Klaus Gerdsmeyery
Carriers &Carriers &Offshore Units
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Design Concepts for LNG FSRU/FPSO with IMO type C cargo tanks
Content:– TGE‘s experience and expertise concerning this
topic D i t f LNG FSRU/FPSO– Design concept for LNG-FSRU/FPSO
Containment systemsSFSRU
FPSO– FLNG and small LNG carriers with IMO
type C cargo tanks
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TGE’s experience and expertise concerning this topicp
• EPC contracts for LNG storages and terminals (export and import)(export and import)
• Conceptual design studies for up to 300,000 m³ LNG FSRUFSRU
• EPCS contracts for cargo systems of LPG FSOs (newbuild and conversion)(newbuild and conversion)
• Market leader for ethylene carriers with IMO type C cargo tanksg
• Design and fabrication (with subcontractor) of > 140 IMO type C cargo tanks
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LNG Receiving Terminal for Reganosa
Location: Mugardos, Spain
Owner: ReganosaOwner: Reganosa
Completion: 2007
First ship unloading: 05/2007
Storage capacity: 2 x 150.000 m³
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LNG Liquefaction Plant, Shan Shan, Xinjiang, P. R. China
Location: Shan Shan, Xinjiang, P. R. China
Owner: Xinjiang GuanghuiOwner: Xinjiang Guanghui Industry andCommerce Group Co.
Completion: 2003
Natural Gas Treatment and Liquefaction Plant for 1 500 000 Nm3/dfor 1,500,000 Nm3/dLNG Storage and Distribution Plant with 30,000 cbm LNG Storage Tank
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LNG-FSRU conceptual design studies
Generic design for topsides (gas handling system) of 250,000 –300 000 m³ FSRU300,000 m FSRU
Total capacity: 250,000 m3
cargo tanks: 5 x 50 000 m³ (Type B)cargo tanks: 5 x 50,000 m (Type B)max. boil-off rate: 0.15 % per dayoperation modes: - shuttle tanker
offloading- no offloading- no send-out
send out: via turret – riser –subsea pipelinesubsea pipeline
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LNG-FSRU: Performance data
• send out capacitypeak 900 t/h (1,000 MMSCFD)base load 720 t/h (800 MMSCFD)min. (holding) 50 t/h (56 MMSCFD)
• send out pressure 60 80 bar• send out pressure 60 – 80 bar• offloading capacity max. 12,000 m³/h • max. BOG handling 12 t/hg• max. power requirem. 12 MW• max. seawater consump. 15,000 m³/h
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78.000 m3 FSO “N`KOSSA II”, A.P. Møller, DK
Shipyard: ODENSE LINDØDenmark
Completion: 1996Completion: 1996Classification: BVTGE scope: Chilling units, deck piping
system, booster pump,cargo heater, HAZOP studies
Vessel: 78 000 m³ conversion to FSOVessel: 78,000 m conversion to FSO
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95.000 m3 LPG-FSO for ConocoPhillips
• Shipyard: Samsung Heavy Industries, Korea
O C Philli• Owner: ConocoPhillips• Completion: 2003• Class: LRSClass: LRS• TGE scope: EPCS-contract,
complete gas h dli thandling system
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M k t l d f th l i ith IMOMarket leader for ethylene carriers with IMO type C cargo tanks
References:• biggest Ethylene carrier gg y(5 x 22,000 m³)• largest series of Ethylene carriers (10 xEthylene carriers (10 x 8,000 m³)
Actual order book:• 27 ethylene carriers at 5 shipyards• first combinedfirst combined LNG/Ethylene carrier with electric propulsion TGE‘s scope: gas
plant and tanksplant and tanks
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Design and fabrication (with subcontractor) of > 140 IMO type C cargo tanks
Tank material references comprise: 5% Nickel-steel, 0,5% Nickel-steel, High strength steel, Stainless steel
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TGE design concept for LNG-FSRU/FPSO
P i i l d i idPrincipal design idea:– Containment system:
• capitalize on vast experiences for type C tanks for ethylene carriers
– Equipment• Adapt the experience from LNG terminal design
to offshore environment (as far as applicable)– Competitive design avoiding monopoly situation of
building shipyard
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Typical containment systems for LNG dominating membrane tank– dominating membrane tank design for LNG-carrier may be vulnerable to sloshing loads
– spherical tanks generate enormous problems to place a process plant and is limited toprocess plant and is limited to very few fabricators
– IHI type B tanks are self ysupporting, but limited to license with very few yards
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TGE design concept for LNG-FSRU/FPSO • TGE containment systems:• TGE containment systems:
type C tanks– upgrade of type C tanks (pressure vessels)upgrade of type C tanks (pressure vessels)
from Ethylene to LNG service– material grades: for LNG service (-163 °C)
• 9% Ni-steel, Stainless steel 304L, Aluminium
– tank design pressure: abt. 4 bar gtank design pressure: abt. 4 bar g– no sloshing problems– tanks can be fabricated outside shipyard– no secondary barrier required
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TGE design concept for containment system
• Tank types– cylindrical tanks – example: 10,000 cbm capacity
per tankd i t di 18 5 l th 43 5• design parameter: dia: 18.5 m; length: 43.5 m
• design density: 0,5 t/cbm• design pressure: 4,0 barg
– Weight: approx. 550 tons (9% Ni)– Specific weight: approx. 56 kg/cbm
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TGE design concept for containment system
• Tank types– bilobe tanks – example: 20 000 cbm capacity perbilobe tanks example: 20,000 cbm capacity per
tank• design parameter: dia: 19.0 m; length: 45.5 mdesign parameter: dia: 19.0 m; length: 45.5 m• design density: 0,5 t/cbm• design pressure: 4,1 bargdesign pressure: 4,1 barg
– Weight: approx. 1350 tons (9% Ni)– Specific weight: approx 67 kg/cbmSpecific weight: approx. 67 kg/cbm
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Arrangement drawing for LNG-FSRU
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Arrangement drawing for LNG-FSRU
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TGE design concept for LNG-FSRU
60,000 m³ 80,000 m³ 180,000 m³Tank capacity 4 x 15,000 m³ 8 x 10,000 m³ 12 x 15,000 m³
Barge 153.6 x 48.4 x 258.4 x 45.8 x 280.8 x 62.4 x dimensions 26.4 m 24.8 m 30.8 mBarge steelweight
15,000 tons 20,500 tons 34,000 tonsg
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Arrangement drawing for LNG-FSRU
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Containment system for LNG-FSRU
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TGE design concept for LNG-FPSO
• Capacity: up to 1,5 Mio. tons per yearC t i t t• Containment system:– identical to LNG-FSRU concept
• Liquefaction process:• Liquefaction process:– TGE has only in-house design available for BOG-re-
liquefaction systems of up to 6 t/h capacity with nitrogen q y p p y gcycle
• specific consumption: abt. 0,75 kWh/kg
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TGE design concept for LNG-FPSO
• Liquefaction process:– For mid-size plants of up to 1,5 Mio. tons per year,
TGE need to partner
– Process under review:• Dual turbine nitrogen cycle:
– specific power requirements: abt. 0.55 kWh/kg• Cascade cycle or single mixed refrigerant
ifi i t bt 0 31 kWh/k– specific power requirements: abt. 0.31 kWh/kg
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FLNG and small LNG carriers with IMO type C cargo tanksyp g
• LNG shuttle tanker for LNG-FPSO/FSRU service– depending on total supply chain the design pressure ofdepending on total supply chain the design pressure of
type C tanks may be very advantageous (energy saving at liquefaction)
• Small LNG ships with type C tanks for short distance trading
fl ibl i d l k– flexible operation due to pressure vessel tanks– flexible vessel employment of multi cargo ships in
developing marketdeveloping market– TGE has an order from Anthony Veder Group for 7,500
m³ LNG/Ethylene-carriery
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TGE design approach for small LNG ships
• Maximising the know-how from design of ethylene carrierscarriers– TGE‘s market share for delivery of gas handling
systems and cargo tanks is more than 70%systems and cargo tanks is more than 70%• Minimising the CAPEX for small LNG carriers• Maximising the flexibility for a combined• Maximising the flexibility for a combined
LNG/Ethylene/LPG-carrier to enhance profitability
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From Ethylene to LNG
• Starting in 2005 TGE made a complete design study for 30,000 cbm LNG carrier with Bureau Veritas
• Ship design was based on previous LEG-carrier• Complete FEM analysis of cargo hold systemp y g y• An „Approval in Principle“ was achieved in 2006• As tanks are independent tank type C, the ship can p yp , p
be built in any experienced shipyard• CAPEX has been estimated as 10 – 15% above
Ethylene-carrier price level
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Cargo tanks for 22,000 m³ Ethylene-carrier5 700 m³ (4 tanks)5,700 m (4 tanks)4.7 bar g480 t5% Nickel steel
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Small LNG carrier with type C tanksT k d i l f 30 000 b it• Tank design example for 30,000 cbm capacity:– 4 Bilobe tanks each abt. 7,500 cbm capacity
• Dia: 15 2m; width: 24 6m; length: 29 9 m• Dia: 15,2m; width: 24,6m; length: 29,9 m• Design density: 0,6 t/cbm:
– partial loading for higher densitiesp g g• Min. design pressure: 2,71 barg for AISI 304L, 4,0 barg
for 9% Ni-steel (due to pressure formula in IGC-Code)T k i ht• Tank weights:
– 9% Ni-steel: abt. 485 tons– AISI 304L: abt. 525 tonsAISI 304L: abt. 525 tons
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Tank insulation for LNG
• Tank insulation for Ethylene:– Typical Polystyrene panels glued to tank surface with abt.
230 mm thickness and k-value of abt. 0,19 W/m2K
• Tank insulation for LNG application– Investigations show that same insulation type may be
applied (spherical LNG tanks use same technology)– Insulation thickness of 300 mm possible in one layer with a su at o t c ess o 300 poss b e o e aye t a
k-value of abt. 0,13-0,14 W/m2K; boil-off rate is abt. 0,21-0,23 %/dayAdditional expansion joints necessary– Additional expansion joints necessary
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30,000 m³ LNG-Carrier
lbp = 175 2 mlbp = 175.2 mb = 27.6 md = 8.8 mspeed = 17.5 knspeed 17.5 kn
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75,000 m³ LNG-Carrier
lbp = 244 5 mlbp = 244.5 mb = 38.4 md = 22.4 mspeed = 18.2 knspeed 18.2 kn
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Bilobe tank for arrangement for LNG-carrier:
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BOG handling for LNG
4,5
5
max. loading: 90,3%
3
3,5
4
ure
[bar
g]
X8 Ni9
2
2,5
3
m v
apou
r pre
ssu
Basic LNG Composition N2:2%
NV 304L max. loading: 92,3%
1
1,5
Equi
libriu CO2:0%C1:89%C2:5,5%C3:2,5%C4:1%
Tank Volume: 30.000 m³
0
0,5
0 10 20 30 40 50 60
Insulation: 300 mm PolystyreneInitial pressure: 140 mbar g
Sailing Time [d]
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Thank you for your a you o youkind attention
for further information please mail to [email protected]