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    MAN Diesel & Turbo: Surveyor's Day Gard/Norwegian Hull Club

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    ironite
    This document appears to be a presentation on fuel cleaning from MAN Diesel & Turbo given at a surveyor's day event in 2017. It discusses catalytic fines (catfines) in fuel and their impact on engine wear. It shows images of catfines embedded in engine components and recommends methods for improving fuel cleaning systems to reduce catfines, such as ensuring separators are operating at 98C. It also examines using replica services and online monitoring to analyze engine wear from catfines.

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    © All Rights Reserved
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    MAN Diesel & Turbo: Surveyor's Day Gard/Norwegian Hull Club

    Uploaded by

    ironite
    116 views29 pages
    This document appears to be a presentation on fuel cleaning from MAN Diesel & Turbo given at a surveyor's day event in 2017. It discusses catalytic fines (catfines) in fuel and their impact on engine wear. It shows images of catfines embedded in engine components and recommends methods for improving fuel cleaning systems to reduce catfines, such as ensuring separators are operating at 98C. It also examines using replica services and online monitoring to analyze engine wear from catfines.

    Original Title

    Catfines

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    This document appears to be a presentation on fuel cleaning from MAN Diesel & Turbo given at a surveyor's day event in 2017. It discusses catalytic fines (catfines) in fuel and their impact on engine wear. It shows images of catfines embedded in engine components and recommends methods for improving fuel cleaning systems to reduce catfines, such as ensuring separators are operating at 98C. It also examines using replica services and online monitoring to analyze engine wear from catfines.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    116 views29 pages

    MAN Diesel & Turbo: Surveyor's Day Gard/Norwegian Hull Club

    Uploaded by

    ironite
    This document appears to be a presentation on fuel cleaning from MAN Diesel & Turbo given at a surveyor's day event in 2017. It discusses catalytic fines (catfines) in fuel and their impact on engine wear. It shows images of catfines embedded in engine components and recommends methods for improving fuel cleaning systems to reduce catfines, such as ensuring separators are operating at 98C. It also examines using replica services and online monitoring to analyze engine wear from catfines.

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    © All Rights Reserved
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    Surveyor's day Gard/Norwegian Hull Club

    2017

    Surveyor's
    MAN Dieselday Gard/Norwegian
    & TurboHull Club
    Bergen
    October 2017
    Peter M. Christensen
    Superintendent Engineer
    MAN Diesel & Turbo  2017 < 1 >
    Fuel cleaning
    Cat-fines: New and used

    New catalytic particles Used catalytic fines: Catfines

    MAN Diesel & Turbo  2017 <


    < 22 >>
    Fuel cleaning
    Cat-fines: New and used - zoom

    New catalytic particles Used catalytic fines: Catfines

    MAN Diesel & Turbo  2017 <


    < 33 >>
    Fuel cleaning
    Cat-fines - Used

    Used catalytic
    fines: Catfines

    MAN Diesel & Turbo  2017 <


    < 44 >>
    Fuel cleaning
    Cat-fines in the 50µm automatic filter

    MAN Diesel & Turbo  2017 < 5 >


    Fuel cleaning
    Cat-fines: Small but tough

    MAN Diesel & Turbo  2017 <


    < 66 >>
    Fuel cleaning
    Cat-fines: Pressed into a piston ring running surface

    L/74251-5.0/0402 (2160/KEA)

    MAN Diesel & Turbo  2017 < 7 >


    Fuel cleaning
    Cat-fines: Pressed into a liner running surface

    MAN Diesel & Turbo  2017 < 8 >


    Fuel cleaning
    Cat-fines: Pressed into a piston ring running surface

    MAN Diesel & Turbo  2017 < 9 >


    Fuel cleaning
    Cat-fines: Pressed into a piston ring running surface

    MAN Diesel & Turbo  2017 < 10 >


    Fuel cleaning
    Embedded cat-fines

    Replica technique:
    The density of cat-fines was found
    extremely high, with up to 3,000 / cm2.
    Acceptable level is below 200 / cm2 !
    The sizes vary from 5µm to 15 µm with a
    smaller number of ”big” cat-fines in a
    range of 20 – 25 µm.
    This is a result of in-efficiently
    working centrifuges.

    MAN Diesel & Turbo  2017 < 11 >


    Fuel cleaning
    Piston ring wear

    Cat fines in fuel:

    Severe wear of liners

    Severe wear of rings

    Wear out of CL-grooves

    Scuffing

    MAN Diesel & Turbo  2017 < 12 >


    Fuel cleaning
    Overflow pipe

    REMARK:
    Overflow pipe should
    always have suction from
    the bottom

    When sailing outside ECA areas cat fines will settle in the service tank.
    To prevent wear the service tank volume must be cleaned before use
    from the tank.
    To clean the tank in service, a surplus of apx. 10 % should be allowed to
    recurculate back to the settling tank, at all times
    MAN Diesel & Turbo  2017 < 13 >
    Fuel cleaning
    LSHFO and HFO

    A fuel system on a new vessel


    prepared for operation in
    todays ECA areas should have

    • Two Seatling tanks (LSHFO &


    HFO)
    • Two Service tank
    • Possibility of splitting the
    system to insure cleaning of
    the fuel in the ECA fuel service
    tank.

    MAN Diesel & Turbo  2017 < 14 >


    Fuel cleaning
    Reduction from 80-60 ppm

    The new ISO 8217:2010 fuel spec.

    HFO Cat fines. have


    been reduced from
    80 ppm to 60 ppm

    MAN Diesel & Turbo  2017 < 15 >


    Fuel cleaning
    SL2005-452

    SL05-452

    Separator effectiveness ~ 80 %

    MAN Diesel & Turbo  2017 < 16 >


    Fuel cleaning
    A fuel problem is a likely root cause

    MAN Diesel & Turbo  2017 < 17 >


    Fuel cleaning
    Separating temperature

    98°C
    95°C
    Separator Temperature !

    Make sure the set-point is set


    to 98°C
    The temperature have a huge
    impact on the effectiveness of
    the separator

    MAN Diesel & Turbo  2017 < 18 >


    Fuel cleaning
    703 hours of operation and high cat-fines concentration

    MAN Diesel & Turbo  2017 < 19 >


    Fuel cleaning
    Replica service – onboard

    MAN Diesel & Turbo  2017 < 20 >


    Fuel cleaning
    Replica service – The guide and the paperwork

    MAN Diesel & Turbo  2017 < 21 >


    Fuel cleaning
    Replica service – Copenhagen PrimeServ

     Normal amount of cat-fines is estimated to


    100 – 200 / cm². Here it was found from
    1500 – 2500 /cm².

    MAN Diesel & Turbo  2017 < 22 >


    Fuel cleaning
    Removal of cat-fines from the engine suffering

    MAN Diesel & Turbo  2017 < 23 >


    Fuel cleaning
    Removal of cat-fines from the liner - Wavecutting

    MAN Diesel & Turbo  2017 < 24 >


    Fuel cleaning
    Online scrape down analysis

    Iron content in scrape down measured with


    online equipment type Kittiwake.

    MAN Diesel & Turbo  2017 < 25 >


    Fuel cleaning
    Online scrape down analysis

    MAN Diesel & Turbo  2017 < 26 >


    Fuel cleaning
    Liner wear is accelerated

    Liner 0.8
    wear rate in mm / 1000 hrs

    0.7
    2
     # 1.
    3
    0.6  # 5 New.
    5
     267 hrs.
    6
    0.5
    8
    9
    0.4
    10
    11
    0.3 12
    5 new
    0.2 Ref. Low
    Ref.high

    0.1 1

    0
    0 5000 10000 15000 20000 25000 30000 35000 40000

    MAN Diesel & Turbo  2017 < 27 >


    Fuel cleaning
    Fuel change over from HFO to HFOLS

     Change over point

    MAN Diesel & Turbo  2017 < 28 >


    Surveyor's day Gard/Norwegian Hull Club

    2017

    Thank you very much for your attention

    MAN Diesel & Turbo  2017 < 29 >

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