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D I Y Gas Sep Wet Exhaust for Gen-Sets

Discussion in 'Technical Discussion' started by Capt Ralph, Dec 28, 2018.

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  1. Capt Ralph, Dec 28, 2018
    #1
    Capt Ralph

    Capt Ralph Senior Member

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    Satsuma, FL
    Installing new 20 & 12kw diesel NL gen-sets.
    Because of limited room in my customers forward machinery space, I would like to build custom glass muffler-gas-Sep units.
    This would be a combo wet muffler with a next stage gas sep.
    Here the water drains below the hull and the cooled exhaust gasses blow overboard. Super quiet.

    In searching the web for models to compare to, I think I can figure water depth (weight) vs in-let and out-let.
    I just could use some reinforcement on the internal plumbing.

    Centec and others make them, just not accommodating to my area to install

    I want to make my own to fit the area I have. Could use a peek inside one to ensure I'm on a correct path.

    Anybody been here before?
  2. wdrzal, Dec 29, 2018
    #2
    wdrzal

    wdrzal Senior Member

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    Location:
    Allegheny Mountains of Western Pa
    Want to go hi tech...…..use Aluminum Foam.

  3. Capt Ralph, Dec 29, 2018
    #3
    Capt Ralph

    Capt Ralph Senior Member

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    Location:
    Satsuma, FL
    Interesting stuff but I don't see how it connects with a glass wet exhaust system?
  4. SeaEric, Dec 30, 2018
    #4
    SeaEric

    SeaEric YF Historian

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    out on the dock
    I wanted a "gensep" when my new gen went in a few seasons back. Tech told me that I didn't have enough height in the engineroom for it to work. It's a consideration that I had not thought of. It's one more thing to be aware of.
  5. wdrzal, Dec 30, 2018
    #5
    wdrzal

    wdrzal Senior Member

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    Location:
    Allegheny Mountains of Western Pa
    Lets hypothesize; you are going to use one of Marmots exhaust soot eliminators, they add heat to the exhaust ,even if you don't, there is still waste heat available to scavenge. You could:
    1: Use aluminum foam as a heat exchanger recovering heat for domestic hot water or to keep the hot tub warm.
    2: Removing heat lowers exhaust pressure & temperature, potentially a quieter, cooler exhaust.
    3: The random porosity of the aluminum foam will absorb and change exhaust frequency waves, no glass needed, again quieter exhaust.

    The above ideas would be more suited for a new build than a R&R job .
    Just note; I don't know Marmot , only read what he posted & published in the forum, actually on second thought, if you would use his device, you should consult with him about removing heat downstream, lower temps and pressures may affect its operation. Hope he chimes in on the subject. Also I'm not affiliated in any way the manufactures of aluminum foam.
  6. Capt Ralph, Dec 30, 2018
    #6
    Capt Ralph

    Capt Ralph Senior Member

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    Location:
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    Lets try this again, expanded.

    I have installed the basic gas sep box. it is installed after the usual water lift muffler. I have a grasp on how it works. These customers are happy. A two part system that eats engine room space.

    I have installed one vertical combo muffler and gas sep unit. It muffles and then separates the exhaust gas from the water. It worked very well. I have not a clue how it is internally plumbed. I can guess, probably close but not to depend a build on. However, I do not have the height for these.

    Then, there is a horizontal combo muffler and gas sep. I have never installed one, further no clue how it's plumbed internally. This is what I need to build in what confines I have.
    Need more data or internal plumbing lay-out to confirm my theory before I build the first prototype.

    Attached Files:

    Last edited: Dec 30, 2018