SAFETY AND RELIABILITY OF GAS FUELLED VESSEL

Transcription

1 SAFETY AND RELIABILITY OF GAS FUELLED VESSEL Sören Karlsson, Wärtsilä WORKSHOP 01, May 20-21, 2013 A TRANS-EUROPEAN TRANSPORT NETWORKS (TEN-T) PROJECT Contract No EU S PARTNERS SUPPORTERS CO-FINANCED BY WORKING METHOD WORKSHOP 01, May 20-21, 2013 ASSOCIATED PARTNERS

2 Next generation Ro-Pax Ferry The world s most environmentally sound large ferry operating commercially from the 15 January 2013

3 Wärtsilä scope of supply Main engines 4x W8L50DF Main propulsion 2 x FPP SILENT 5 blades LOWEST INDUCED PRESSURE IMPULSE 3 Tunnel Thrusters 2 x 200 LNGPac systems Bunker stations 4 x Gas valve units (GVU) Compact Silencer system 3 Wärtsilä

4 Built Up Propeller (BUP) Chosen design was a Wärtsilä Built-Up propeller instead of a Monobloc Latest design BUP gives similar efficiency and pressure pulse levels Replacing and repairby exchanging to easy (de)mountable blades Under water repairs are possible / 24 Wärtsilä Doc.ID: DBAB Revision: - Status: Finalised

5 Final Propeller Design Tests performed at MARIN: Open water efficiency (in design J- value) 0.705, well above guaranteed value of 0.69 and very close to our prediction of 0.70 Maximum hull pressure fluctuation: 1.1 kpa (85% trial condition), guarantee was 1.8 kpa Construction in stainless steel and ice class by Wärtsilä hydrodynamic- and metallurgical- departments and Lloyd s Register / 24 Wärtsilä

6 Final result and Viking Line s comments: STX has done an excellent work, to design an optimal hull, service speed is achieved at lower power than even the most optimistic prediction : Excellent work! Wärtsilä propeller design department has done their home work, and the efficiency of the propeller is outstanding compared to existing design : Excellent work! / 24 Wärtsilä Doc.ID: DBAB Revision: - Status: Finalised

7 Meeting class redundancy requirements Major classification societies rules and IGF guidelines from IMO demand high redundancy when operating vessels on natural gas (IMO MSC86/26 ) In case of leakage in a gas supply pipe making shutdown of the gas supply necessary, a secondary independent fuel supply should be available. Alternatively, incase of multi-engine installations, independent and separate gas supply systems for each engine or group of engines may be accepted For single fuel installations (gas only) the fuel storage shall be divided between two or more LNG tanks of approximately equal size. 7 Wärtsilä 24 May 2013 Fjellstua, Ålesund

8 GVU GVU GVU Onboard installation How do you create your redundancy? 4-STROKE DUAL-FUEL 4-STROKE SINGLE GAS LNGPac LNG tank Gas processing is about 25% of gas fuel system cost DF engine Single gas engine 8 Wärtsilä 24 May 2013 DF Vs SG

9 Onboard installation How do you create your redundancy? Single LNG tank with one coldbox concept is approved by all major classification societies Single LNG tank with two coldbox concept is NOT approved by most of major classification societies 9 Wärtsilä 24 May 2013 DF Vs SG

10 Meeting class redundancy requirements For other gas engines than DF engines, the redundancy requirements can be met by either of the two following alternatives: Installing double LNG tanks and fuel supply systems Installing back-up diesel fuel generators Gas-fuelled ships (not DF) with diesel generators installed for redundancy Vessel type Gas engines [kw] Diesel engines [kw] Propulsion power [kw] Ratio diesel engine/ gas engine installed power [%] 1 2 x 2,600 2 x x x % 2 1 x x % 3 2 x x x % 4 3 x x x x % 5 2 x x x % 10 Wärtsilä 24 May 2013 Fjellstua, Ålesund

11 Wärtsilä gas application Wärtsilä Dual Fuel engines are real GAS engines with flexibility Can start in gas mode Can stop in gas mode Can operate on low load in gas mode Can idle in gas Can change between gas and liquid fuel on the go Can operate on one lube oil for all fuels Can operate on cheapest fuel available 11 Wärtsilä 24 May 2013 DF Vs SG

12 Emission comparison diesel electric propulsion 120% 100% 80% 60% 40% 20% 0% CO2 NOx SOx Particles Diesel engine with HFO Diesel engine with MDO DF engine in gas mode DF engine in diesel mode 12 Wärtsilä

13 Total Greenhouse Gases 100% Approx ~20% reduction* CH 4 as CO 2 CH4 equivalent as CO2 when equvialent CH 4 part of THC max is max 90% 50% CH 4 as CO 2 CH4 equivalent as CO2 when eqvialent CH 4 part of min THC is max 60% 0% HFO MDO DF CO2 2 Based on the ISO defined operating profile CH4 in THC is 60-90% depending on gas composition * Based on 32 / 34 bore comparison 13

14 Wärtsilä 50DF - THC 6 g/kwh 25% 50% 75% 100% Model: Model: THC consist of Methane (CH 4 ), Non methane hydrocarbons and formaldehydes Depending of the gas quality CH 4 is around 60-90% of the total THC 14

15 Dual-Fuel applications - References Power Plants Merchant Offshore Cruise and Ferry Navy Others DF Power Plant 51 installations 186 engines Online since1997 LNGC 108 vessels 429 engines Conversion 1 Chem. Tanker 2 engines conv. Complete gas train Complete design PSVs/FPSOs 20 vessels 93 engines Online from 1994 New orders: Harvey Gulf; the first 4 LNG- PSV to be operated in the Gulf of Mexico! LNG ferries 1 vessels 4 engines per vessel Complete gas train 2800 passengers In service early 2013 Coastal Patrol DF-Mechanical DF main and auxiliary engines Tug 2 vessel 2 engines each Mechanical drive Guide ship 1 vessel 6 segments ~190 installations > running hours 15 Wärtsilä

16 LNG - Storage Tanks The tanks are located in the aft end Volume of the tanks 2 x 200m3 ~ 160 tonnes LNG Gas relief mast located between the tanks Water spray cooling for protection LNG evaporation are using the DF Engine LT-heat and Heat from Air Condition-system, cold recovery (Wärtsilä patent) 16 Wärtsilä

17 LNG project definition The following requirements were set by the project: Fast LNG bunkering during 1 hour at port*) Wireless SIGGTO connection for bunker protocol *) Operation in gas mode, simultaneously bunkering LNG *) Utilize the latent heat in LNG for vessel HVAC system (air conditioning) Wärtsilä patent *) Feeding both engine rooms from one LNGPac LNG tank located above bunker station. How to drain the LNG? *) First gas fuelled RoPax Bunkering line prepared for keeping LNG in all the time. No class rules available by LR *) = First LNG fuelled vessel with these requirements 17 Wärtsilä

18 Design process of the LNGPac System design and component choosing Collecting Input of design parameters: accelerations.. Pipe 3D Design Stress analyses of the pipe system FEM analyse of the tank- and aux-room structure Bottom pipe design Bunker station design Tank design Analyses FMEA of LNGPac, GVU together with both GL and Lloyds register. Attend in ship HASOP and bunkering HASOP. Attend in certification of components. 18 Wärtsilä

19 Auxiliary room Wärtsilä has supplied the LNG tanks with tank room (cold box) also a complete auxiliary room including; Heating media pumps Heat exchangers Motor starters Solenoid cabinets Liquid expansion tanks Nitrogen buffer tank Ventilation system Pipe arrangements 20 Wärtsilä 24 May 2013 Viking Grace LNGPac

20 Transportation from Teuva to harbor in Kaskö 22 Wärtsilä 24 May 2013 Viking Grace LNGPac

21 Viking Grace Lifting of the LNGPac in to the dry dock 23 Wärtsilä 24 May 2013 Viking Grace LNGPac

22 Engine and gas valve arrangement Safe Return to Port compliant: 4 main engines Wärtsilä 8L50DF, 2 sets in each engine room Inherently safe engine rooms: Fully enclosed gas valve units, placed inside the engine rooms / 24 Wärtsilä Doc.ID: DBAB Revision: - Status: Finalised

23 Conventional design Forced ventilation Single wall fuel gas pipe Double wall fuel gas pipe Gas safe area Gas hazardous area Engine room, gas safe area GVU room, Ex Zone 1 Air in * Air out Fuel Gas Tank GVU * to double wall fuel gas feed pipe annular space 25 Wärtsilä Greentech seminar, Copenhagen, 31th May 2011, Wärtsilä

24 LNG Bunker station Two bunker stations PS and SB aft Flexible hose connected with bunker line by quick connect coupling with spill prevention CCTV monitoring of the bunker process ECR in wireless connection with the bunker barge 26 Wärtsilä

25 Viking Grace Smokeless emissions from the exhaust gas pipes and Compact Silencer system less than 50dB at 100 m.. Very...very silent More information about the vessel can be found from link: 28 Wärtsilä 24 May 2013 Viking Grace LNGPac

26 Famous investor - Sir John Templeton "Bull markets are born on pessimism, grow on skepticism, mature on optimism, and die on euphoria. 29 Wärtsilä 10 November 2010 Ship Power Technology / Sören Karlsson

27 Thank you! 30 Wärtsilä 24 May 2013 Viking Grace LNGPac