Click for Mag Bay Click for Nordhavn Click for Lurssen Click for Lurssen Click for Cross

insulation of Engines exhausts

Discussion in 'Engines' started by comship, Dec 16, 2007.

You need to be registered and signed in to view this content.
  1. comship

    comship Senior Member

    Joined:
    Jan 27, 2007
    Messages:
    174
    Location:
    Greece
    As I was looking in the market available materials for insulation of the Exhausts of Main Engines I have found the pyrogel 6671 by Aspen Aerogels. It seems to be a really fantastic product based on nanotechnolgy. The Italian vendor assured me that by applying this system, the emitted temperature of the exhausts shall be decreased from 650+ Celcius to 36-37 degrees Celcius.

    Does anyone has any experience of these products?
  2. HONGKONG

    HONGKONG Senior Member

    Joined:
    Jan 7, 2006
    Messages:
    74
    Location:
    NASSAU and now Miami
    IN YOUR 3rd SENTENCE, CHANGE EMITTED TO RADIATED. DUE TO THE THERMAL CONTAINMENT PROPERTIES OF THIS PRODUCT, "EMITTED" TEMPERATURES CAN ACTUALLY BE SEEN TO RISE, WHILE INVERSELY, "RADIATED" SHOULD BE LOWERED, BASED ON THICKNESS OR DEPTH OF LAGGING APPLIED. CAREFUL STUDY SHOULD BE APPLIED TO ANY INTERFACES BETWEEN METAL TO GRP/FRP OR METAL TO PAINTED SURFACES AS HIGHER EMITTED TEMPERATURES COULD INDUCE FAILURE OF THESE CONNECTIONS. IN A DRY STACK EXHAUST, STANDOFFS AND SUPPORT BRACKETS MAY NEED (FURTHER) INSULATION AND IN A WET EXHAUST, INJECTED WATER FLOW SHOULD BE MONITORED AND BE DETERMINED TO BE SUFFICIENT BEFORE THE PIPE/GRP, PIPE/HULL INTERFACE.

    AS FAR AS THE CLAIMS MADE BY THE BUILDER, HAVE THEM PUT IN THE SPECS
  3. comship

    comship Senior Member

    Joined:
    Jan 27, 2007
    Messages:
    174
    Location:
    Greece
    Thank you for your correction but you did not refer to the specific product
  4. CaptPKilbride

    CaptPKilbride Senior Member

    Joined:
    Mar 16, 2004
    Messages:
    592
    Location:
    On the water
    Actually, the way I read the product spec, it reduces the surface contact temperature to 36-37 degrees celsius. Pretty important in an engine room, IMHO... less chance of a burn if hman flesh comes in contact with it, less chance of a fire in the case of a petroleum product leak.

    The product looks pretty good to me, but then again I am not an engineer. :cool:
  5. comship

    comship Senior Member

    Joined:
    Jan 27, 2007
    Messages:
    174
    Location:
    Greece
  6. comship

    comship Senior Member

    Joined:
    Jan 27, 2007
    Messages:
    174
    Location:
    Greece
    Hongkong please do not use capital letters because it seems that you are shouting
  7. HONGKONG

    HONGKONG Senior Member

    Joined:
    Jan 7, 2006
    Messages:
    74
    Location:
    NASSAU and now Miami
    Not by name (the assumption being you already knew it), but by inference. (see 2nd sentence)
  8. HONGKONG

    HONGKONG Senior Member

    Joined:
    Jan 7, 2006
    Messages:
    74
    Location:
    NASSAU and now Miami
    I stand rebuked.. Too too many hours in engine rooms, I do this in person also.
  9. comship

    comship Senior Member

    Joined:
    Jan 27, 2007
    Messages:
    174
    Location:
    Greece
    You are right the correct term is not emission but radiation