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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.<br>
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On 4/13/2014 8:45 PM, Joe Perkel wrote:<br>
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<div style="margin: 0in 0in 10pt;"><font face="Calibri" size="3">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.</font><!--?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /--><o:p></o:p></div>
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<div style="margin: 0in 0in 10pt;"><font face="Calibri" size="3">In
looking at my SeeHund replica, note that the
torpedo/pod(s) length exceed needed battery capacity. <span
style="mso-spacerun: yes;"> </span>So the idea being that
the aft ends of both
will house electric motors that are isolated from the
battery compartments.</font><o:p></o:p></div>
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<div style="margin: 0in 0in 10pt;"><font face="Calibri" size="3">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.<span
style="mso-spacerun: yes;"> </span>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 <span style="mso-spacerun: yes;"> </span>main
induction
and exhaust vents. <span style="mso-spacerun: yes;"> </span>All
this
for continuous surface running of course. Submerged, the
motor units would be
intermittent duty.</font><o:p></o:p></div>
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<div style="margin: 0in 0in 10pt;"><font face="Calibri" size="3">The
centerline unit would be fully enclosed and not vented,
therefore not as attractive for continuous duty due to
thermal constraints.</font><o:p></o:p></div>
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<div style="margin: 0in 0in 10pt;"><font face="Calibri" size="3">Joe</font><o:p></o:p></div>
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