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7/23/2019 ICE Class Arctic Tanker
http://slidepdf.com/reader/full/ice-class-arctic-tanker 1/24
Arctic Tanker Design for Extreme ConditionsKey Considerations
Kirsi Tikka – ABS
Vladimir Evenko - RS
Pavel Shikhov – RS
Mun-Keun Ha – SHI
Jae-Woon !hoi -SHI
Arctic ShippingConference
27 September 2006Hamburg, Germany
7/23/2019 ICE Class Arctic Tanker
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Drivers in Ep!oitation of "i! an# Gas
• Political, social and economic changes
• Increased global energy demand driven byChina and India
• Political instability in the Middle East
• Environmental protection
7/23/2019 ICE Class Arctic Tanker
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Cha!!enges for Energy $ransportation
• Suez Crisis: VCC and!CC
• E""on Valdez accident:Mandatory double hull
re#uirements• Sa$ety, Security and
Environmental Protection:ISM, ISPS, %MS&
• Mar'et $or (atural )as:arge () carriers
• *il $rom +ussia: arger icestrengthened tan'ers
Indus"r# Res$onse
7/23/2019 ICE Class Arctic Tanker
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Arctic Cha!!enge
• ac' o$ e"perience ith largervessels
• +emoteness and lac' o$
in$rastructure
• Impact on the cre
– Cold temperatures – ac' o$ light and visibility
• Sa$ety e#uipment $it $or the
conditions
• ac' o$ operational e"perience
• oads on the hull andappendices
• -irst year and multiyear ice
• .esign o$ e#uipment $or lo
temperatures
– -reezing conditions
– Icing and ice bloc'age
Sa%e"#
7/23/2019 ICE Class Arctic Tanker
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Arctic Cha!!enge
• %emperature
• Ice Conditions
• Visibility
• /ind• /aves
Environmen"al !ondi"ions
7/23/2019 ICE Class Arctic Tanker
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%interi&ation of an Arctic $an'er
• 0ull construction and e#uipment – Material selection
– %an' arrangement and heating
– .e1icing
• Systems and machinery – +eliability and redundancy
– .ec' machinery
– Piping
• Sa$ety systems – i$e saving appliances
– (avigational systems
• Ergonomic considerations – Enclosed or' spaces
– Protective gear
– Insulation o$ accommodation spaces• %raining and manning
• Environmental protection
Gui#ance for ship o(ners
an# shipyar#s on specia!consi#erations for harsh
environments
7/23/2019 ICE Class Arctic Tanker
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%interi&ation of an Arctic $an'er
Prevention of Ballast Tanks from Freezing
• &rrangement $or preventing $reezing in ballast tan'sat higher service temperatures
• 0eating calculations re#uired $or loer designservice temperatures
7/23/2019 ICE Class Arctic Tanker
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%interi&ation of An Arctic $an'er
• )eneral procedures based on overall heat trans$ercoe$$icients – *verly conservative
– ac's the in$ormation on sur$ace temperatures
• (e developed procedure based on the variable heattrans$er coe$$icient representing variable convectivecoe$$icient related to temperature and ind conditions – &pplied to the determination o$ heating capacity in a ballast tan' $or
the arctic shuttle tan'er2
Pro&edure %or Es"ima"in Re'uired Hea"in !a$a&i"# in Tanks
7/23/2019 ICE Class Arctic Tanker
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%interi&ation of An Arctic $an'er
Pro&edure %or Es"ima"in Re'uired Hea"in !a$a&i"# in Tanks
7/23/2019 ICE Class Arctic Tanker
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%interi&ation of An Arctic $an'er
Pro&edure %or Es"ima"in Re'uired Hea"in !a$a&i"# in Tanks
7/23/2019 ICE Class Arctic Tanker
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%interi&ation of An Arctic $an'er
Pro&edure %or Es"ima"in Re'uired Hea"in !a$a&i"# in Tanks
7/23/2019 ICE Class Arctic Tanker
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App!ication of )ce C!ass *e+uirements
• Classi$ication
• Ice Strengthening
• Main Engine *utput
• Propulsion System
RS Ice Rules - Content
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App!ication of )ce C!ass *e+uirements
• Ice Strength Characteristics• Ice thic'ness variable in &rctic 3 distribution la
determination
• .esign ice loads hen operating under 4ase .angerous
Conditions• 5ualitative description 3 Permissible Service Conditions
• 5uantitative description 3 Ice Classes
RS Ice Rules – Design Principles
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App!ication of )ce C!ass *e+uirements
6i7 /hen a ship is under permissible iceconditions, the hull3ice interaction should notlead to damages o$ the structuresdeteriorating the structural sa$ety o$ a ship2
6ii7 %he re#uired ship sa$ety level in ice duringvarious maneuvers and operations isprovided by the re#uirements to the minimalengine output2
Service Conditions – eneral Description
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Permissi!le Service Conditions
App!ication of )ce C!ass *e+uirements
App!ication of )ce C!ass *e+uirements
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App!ication of )ce C!ass *e+uirements
• ! 8• /inter1Spring (avigation
• Independent *peration
• 4arents Sea
– E"treme navigation 3 high ris' o$ hull damage – 0eavy, Medium, Easy (avigation 3 operation alloed
• 9ara Sea – E"treme, 0eavy, Medium (avigation 3 operation prohibited
– Easy (avigation 3 operation alloed
Permissi!le Service Conditions - "#ample
App!ication of )ce C!ass *e+uirements
7/23/2019 ICE Class Arctic Tanker
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App!ication of )ce C!ass *e+uirements
• ! 8• /inter1Spring (avigation
• Icebrea'er Pilotage
• 4arents Sea
– E"treme, 0eavy, Medium, Easy (avigation 3 operation alloed
• 9ara Sea – E"treme, 0eavy (avigation 3 high ris' o$ hull damage
– Medium, Easy (avigation 3 operation alloed
Permissi!le Service Conditions - "#ample
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App!ication of )ce C!ass *e+uirements
• Ice hull damage is to be considered as result o$ singleaction o$ ice load
• .esign ice load corresponds to the ultimate hull structuralstrength at restricted plastic de$ormation
• & single ice damage ith probability ;< is to be consideredas normal operating practice
• %he ice load is to be assigned based on an e#ual damageprobability $or di$$erent ice strengthening zones2
• !ltimate strength criterion 1 .esign ice load not e"ceedingultimate load on structure
Structural Strengt$ Criteria
7/23/2019 ICE Class Arctic Tanker
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App!ication of )ce C!ass *e+uirements
%ull form and ice !elt area
7/23/2019 ICE Class Arctic Tanker
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App!ication of )ce C!ass *e+uirements
Side Structure )rillage
Plas"i& de%orma"ion o% side s"ru&"ure under i&e load (l"ima"e load &urve
<imate 'imit State
7/23/2019 ICE Class Arctic Tanker
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"ngine (utput
evel ice capability $or modern ice going vessels according to (e +S +ules and
Model and -ull scale tests
App!ication of )ce C!ass *e+uirements
)orilsk-II* +ou,le a&"in Shi$
I&e &a"eor# – .(/
+is$la&emen" –01111"
Enine Po2er 3435111 kW
.are &a$a&i"# "anker 6Varande#7
I&e &a"eor# .(8+is$la&emen" 9:1111"
Enine Po2er 04;<111 kW
Mode Traditional mode
improved icebreaking
bow
DAT mode
Traditional mode
Astern mode
Model and full
scaletest 93-<m a" VS=0 93-<m a" VS=5 93-8m a" VS=0 93-8m a" VS=0
RS Ice Rules
3-<>m a" VS=0
3-<<m a" VS=5
3<<m a" VS=0 3-<m a" VS=0
7/23/2019 ICE Class Arctic Tanker
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App!ication of )ce C!ass *e+uirements
Propeller 4lade
• .esign ice loads
• .esign stress
• Permissible stress
• Scantlings
Propulsion S)stem
bi!i f $ ' i )
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aneuverabi!ity of -arge $an'ers in )ce
• 0ull shape $or ice brea'ing in ahead and astern modes• Podded propulsion
• Stopping ability
• Path stability
• Initial turning and ya chec'ing abilities• %urning ability
• Importance o$ model test $or chec'ing maneuverability
$han' you for your attention
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$han' you for your attention