Increasing use of low viscous, low sulphur blending components in order to meet commercial specifications and requirements for Marine Heavy Fuel, seems to have made an adverse impact on ignition and combustion properties of HFO. The paper presents recent findings and research results related to ignition and combustion properties of HFO and MDO fuels. The findings are based on extensive laboratory research and development as well as ship board experience from practical operations. In addition to the CCAI parameter, a standardized method for measuring actual ignition and combustion properties is now available (IP541). The project documents the limited global correlation between CCAI and actual ignition properties expressed by the Estimated Cetane Number (ECN) which is one of the parameters from IP541 combustion testing. An alternative screening method has been developed based on CCAI in combination with other easily available (low cost) analytical parameters like C, H and N. The screening method can be used to increase detection rate of potential problem fuels based on recommendations of ECN limit values from leading engine manufacturers. The method can be used to identify fuel samples that should be subject to further analysis by IP541 test method in order to verify the actual ECN values and avoid use of potential problem fuels onboard the ships. An extensive laboratory test program of Marine Distillate Fuels (DMA, DMB, DMC) has been conducted in order to get an overview of actual ignition and combustion quality of distillate fuels on the market. The results shows large variations, and indicates that current fuel specifications do not seem to secure consistent levels of ignition and combustion properties of Marine Distillate Fuels. The paper questions whether increasing demand for distillate fuels may have an adverse impact on ignition and combustion quality also for these fuels supplied to ships in the future.


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    Title :

    Ignition and combustion properties of marine fuels, potential problems and challenges will current and revised fuel specifications be able to ensure ignition and combustion characteristics will be adequately addressed?


    Contributors:


    Publication date :

    2010


    Size :

    14 Seiten, 23 Bilder, 6 Tabellen, 8 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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