[PSUBS-MAILIST] Motor Pod Ventilation

[Sean T. Stevenson]

Airflow in constrained spaces is often difficult to model. Alternatives include water cooled motors, or simply effectively heat sinking the motor housings to the hull and using passive water cooling to the ambient seawater. Ultimately, that's where the heat is going anyway. Unless you can use it for some purpose (cabin heat, humidity control etc.) you might as well sink it as directly as possible.

Sean


On April 13, 2014 6:45:39 PM MDT, Joe Perkel <josephperkel at yahoo.com> wrote:
>I am considering a scheme for dealing with electric motor
>cooling and would like input on the viability of the idea and any pros
>or cons
>that I may be missing.
>In looking at my SeeHund replica, note that the
>torpedo/pod(s) length exceed needed battery capacity.  So the idea
>being that the aft ends of both
>will house electric motors that are isolated from the battery
>compartments.
>I’m thinking to ventilate these aft motor units into the aft
>machinery space within the main hull. Incidentally, the hull diameter
>will be
>42” and the torpedoes #14 pipe. This will leave a significant airspace
>around
>these motor units allowing me to use fan cooled motor cases.  Each
>motor pod could be connected with vent
>pipes for intake and output airflow, then the machinery space itself
>force
>vented to the outside with  main
>induction and exhaust vents.  All this
>for continuous surface running of course. Submerged, the motor units
>would be
>intermittent duty.
>The centerline unit would be fully enclosed and not vented,
>therefore not as attractive for continuous duty due to thermal
>constraints.
> 
>Joe
>
>
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-- 
Sent from Kaiten Mail. Please excuse my brevity.
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