Engine room ventilation

Discussion in 'Boat Design' started by Gayashan, Oct 12, 2017.

  1. Gayashan
    Joined: Oct 2017
    Posts: 2
    Likes: 0, Points: 1
    Location: Sri lanka

    Gayashan New Member

    Hi,
    I have to design engine room ventilation system.The machineries are as follows,
    1. 300kW diesel engine
    2. 30kw diesel generator
    Kindly tel me how to do the calculation for this.
     
  2. TANSL
    Joined: Sep 2011
    Posts: 4,626
    Likes: 85, Points: 58, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    I always calculate for 60 air renewals per hour plus the volume of air consumed by the engines. Only the net volume of the engine room should be taken into account.
    I do not know if there is a fixed standard for this so you will find many opinions.
     
  3. Gayashan
    Joined: Oct 2017
    Posts: 2
    Likes: 0, Points: 1
    Location: Sri lanka

    Gayashan New Member

    Thank you ,
    I have taken that in to my design .Using this,It gives 5500m3/hr flow rate. but engine emit 27kW heat to the engine room ,I use q=mc(t1-t2) eqn to find the flow rate .It gives 8000m3/hr flow rate (with the consumed Air). Kindly give me some advice .
     

  4. TANSL
    Joined: Sep 2011
    Posts: 4,626
    Likes: 85, Points: 58, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    I have never calculated the heat emitted by the engine. It is assumed that, whatever the value, renewing the air 1 time per minute will cause the temperature not to reach exaggerated values. For outdoor air temperatures between 20-32 degrees, that number of renovations should be sufficient.
     
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