[PSUBS-MAILIST] Motor Pod Ventilation

[Jon Wallace]

A good part of the year in your climate the outside air is likely to be 
hotter than the sea.  I'm not convinced there's a clear benefit 
outweighing the sea as a heat sink.


On 4/13/2014 8:45 PM, Joe Perkel 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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