Wärtsilä LNGPac

Wärtsilä LNGPac™ is a complete fuel gas handling system for LNG fuelled ships and includes the bunkering station, LNG tank and related process equipment as well as the control and monitoring system.

The LNG fuel system can be offered as a standalone product, as well as a part of a complete propulsion system. Wärtsilä can deliver LNG systems for propulsion and power generation for any applicable types of ship or engine.

    Technical data
    • Type C pressure vessel. Design pressure 6-9 bar.
    • Pressurised or cryogenic pump based gas feed solution.
    • Vacuum (MLI and Perlite) or polyurethane insulation.
    • Horizontal, vertical, longitudinal and transversal placing.
    • LNG process equipment locatedinside built-on tank connection space or deck mounted vaporising skid.
    • Class approved safety and control system.
    • Remote actuated and manually operated cryogenic valves.
    • Dedicated control and monitoring system.

    The Wärtsilä LNGPac™ system is based on IMO type C LNG storage tank with either double walled vacuum or single walled polyurethane insulation. Bunkering takes place from the bunkering station to the LNG tank via an insulated pipe. All necessary process equipment is installed in a separate unit which can be either mounted directly to the LNG tank or placed remotely from the LNG tank. The main process equipment ensures correct gas temperature and pressure for the engines and other gas consumers.

    The LNGPac system can be customised to the needs of each project on a case to case basis. Dedicated engineering is conducted from the beginning of the project to match the specific operational requirements, safety- and classification society requirements.

    Applications

    Wärtsilä can deliver LNG systems for propulsion and power generation for any applicable types of ship or engine, either as a standalone product or as a part of a complete propulsion system.

    Current references include the following ship types:

    • Product tanker
    • Cruise ferry
    • RoRo
    • RoPax
    • Small ferry
    • PSV
    • Tug
    Key benefits

    Our innovative features have made the LNGPacTM a simple plug and play solution with the following benefits:

    INTEGRATED AIRLOCK
    The Airlock can be integrated with the LNGPac™. This reduces the floor foot print, increases safety aspects and makes the installation for the yard much easier.

    INTEGRATED CONTROL CABINET
    The Control Cabinet can be integrated with the LNGPac™. This innovation results in a dramatic reduction of interfaces since the electrical cabling from the LNGPac™ to the external switchboards can be reduced to only a few cables. LNGPac automation can be connected to the Wärtsilä engine digital ecosystem for global maintenance support during complete vessel life cycle. One supplier for automation design, project execution, commissioning work and services - reducing project risk and minimizing delays in communication.

    INTEGRATED GAS VALVE UNIT (GVU)
    The functional components of the GVU can be integrated as part of the LNGPac™. By combining the LNGPac™ and the GVU into a single system, considerable space can be saved. The solution will also save installation time and costs for the yard.

    REMOVAL OF THE HEATING MEDIA SKID
    New evaporator type allows the engine LT-water to be directly connected to LNGPac without the need of an intermediated heating media circuit. This leads to fewer interfaces and installation work is required.

    MAINTENANCE ORIENTED DESIGN
    LNGPac™ design focuses on enabling safe service and maintenance of all core equipment related to the operational functionality of LNG bunkering and gas consumption without emptying the tank.

    Methane Number

    Wärtsilä Methane Number Calculator

    We have developed this tool for ship owners and operators to calculate the Methane Number of the fuel gas.
    The calculation result indicates whether or not the given gas quality is suitable for use in Wärtsilä dual-fuel engines.

    Methane CH4
    mol%
    EthaneC2H6
    mol%
    PropaneC3H8
    mol%
    Iso-butane (2-Methylpropane)i-C4H10
    mol%
    N-butanen-C4H10
    mol%
    Iso-pentane (2-Methylbutane)i-C5H12
    mol%
    N-pentanen-C5H12
    mol%
    EthyleneC2H4
    mol%
    PropyleneC3H6
    mol%
    Neo-pentane (2,2-Dimethylpropane) neo-C5H12
    mol%
    Mix-hexaneMix C6H14
    mol%
    Mix-heptaneMix C7H16
    mol%
    N-Octanen-C8H18
    mol%
    Carbondioxide C02
    mol%
    CarbonmonoxideC0
    mol%
    HydrogenH2
    mol%
    Nitrogen N2
    mol%
    Hydrogen sulfideH2S
    mol%
    Total mol%
    Wärtsilä Methane number (WMN)
    Propane Knock Index (PKI)
    The calculation tool is owned by Wärtsilä and is made for customer use and is for guidance only. Changes in the tool is reserved at any time.
    • JS INEOS Insight
      The first in a series of 27,500 cbm ‘Dragon’ class vessels ordered by Evergas, a world renowned owner and operator of seaborne petrochemical and liquid gas transport vessels, has been delivered from the Sinopacific Offshore & Engineering (SOE) shipyard in China.

      JS INEOS Insight

    • Bit Viking
      The 25,000 dwt product tanker Bit Viking was the first vessel ever to undergo a conversion by Wärtsilä from Heavy Fuel Oil (HFO) to Liquefied Natural Gas (LNG) operation.

      Bit Viking

    • LNG fuelled drilling rig
      Wärtsilä has the technology and the expertise to make a switch to LNG fuel both technically feasible and economically appealing.

      LNG fuelled drilling rig

    • Viking Grace
      Wärtsilä supplied the propulsion machinery for the ‘Viking Grace’, the world’s first LNG powered passenger vessel.

      Viking Grace

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