瓦锡兰50DF发动机

旨在提供高输出、燃料灵活性、低排放、效率和可靠性

瓦锡兰50DF发动机可以使用天然气、轻质燃料油(LFO)或重质燃料油(HFO),并且可以在运行过程中平稳地切换燃料,而且无论使用哪种燃料,都能提供相同的输出。

瓦锡兰50DF发动机依靠的是稀薄燃烧的工作原理。稀薄燃烧实现了高压缩比,从而提高了发动机效率,降低了峰值温度,因此也减少了氮氧化物的排放。

进气和先导燃料喷射都采用电子控制。发动机功能由一个先进的自动化系统控制,可以设置最佳运行条件,不受环境条件或燃料类型的影响。

 
    Advantages

    Fuel flexibility

    The technology enables the engine to be operated on either natural gas, light fuel oil (LFO), or heavy fuel oil (HFO), and switching between fuels can take place seamlessly during operation, without loss of power or speed. This ensures safety and continuous installation operability. The Wärtsilä 50DF engine is designed to have the same output regardless of the fuel used.

    One of the reasons for the strong success of this particular engine over the alternatives is its superior propulsion efficiency. The clear environmental advantages that operating on gas allows, is another factor in the success of this technology. When operating in gas mode, the nitrogen oxide (NOx) emissions are at least 85 percent below those specified in the current IMO regulations, and CO2 emissions are some 25 percent less than those of a conventional marine engine running on diesel fuel. Additionally, the sulphur oxide (SOx) and particle emissions are negligible at almost zero percent.

    Technical data
    Wärtsilä 50DF IMO Tier III
    Cylinder bore 500 mm Fuel specification: Fuel oil
    Piston stroke 580 mm 700 cSt/50°C     7200 sR1/100°F
    Cylinder output 950, 975 kW/cyl
    Speed 500, 514 rpm ISO 8217
    Mean effective pressure 20.0 bar ISO-F-DMX, DMA & DMB
    Piston speed 9.7, 9.9 m/s BSEC 7150 kJ/kWh at ISO cond.
    BSGC 7110 kJ/kWh at ISO cond.
    Dimensions (mm) and weights (tonnes)
    Engine type A B C D F Weight
    6L50DF 8115 3 475 3 270 4 000 1 455 96
    8L50DF 10 230 3 920 3 505 4 000 1 455 128
    9L50DF 11 140 3 920 3 505 4 000 1 455 148
    12V50DF 10 410 4 055 3 810 3 600 1 500 175
    16V50DF 13 085 4 400 4 730 3 600 1 500 220
    18V50DF 14 180 4 400 4 730 3 600 1 500 240

    50df


    Rated power
    Engine type Engine kW (50Hz) Gen. kW (50Hz) Engine kW (60Hz) Gen. kW (60Hz)
    6L50DF 5700 5500 5850 5650
    8L50DF 7600 7330 7800 7530
    9L50DF 8550 8250 8775 8470
    12V50DF 11400 11000 11700 11290
    16V50DF 15200 14670 15600 15050
    18V50DF 17100 16500 17550 16940
    Generator output based on a generator efficiency of 96.50 %
    Applications

    Wärtsilä’s advanced dual-fuel technology was first launched in the early 1990s for use in land-based power plant applications. The first marine installation of the 50DF engine came a decade later.

    The fitting of Wärtsilä 50DF engines onboard the first LNG Carriers in 2006 set a trend in the industry. Since that introduction, 65 percent of all new LNG Carriers have been fitted with Wärtsilä dual-fuel engines.

    In addition to its success in the LNG Carrier market, the Wärtsilä 50DF engine is increasingly being considered by owners and operators throughout the shipping industry. For example, in the cruise and ferry sector, where it is often necessary to operate in Emission Control Areas (ECAs), there is growing awareness of the advantages of operating on gas.

    Similarly, vessels serving the offshore oil and gas industry are increasingly being fitted with Wärtsilä dual-fuel engines. The need for flexibility, fuel efficiency, and compliance with stricter environmental regulations, are the drivers behind this trend.

    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.

    References

     

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