<table cellspacing="0" cellpadding="0" border="0"><tr><td valign="top">Jim,<br/><br/>I've been studying the a/c and ventilation systems of the fleet boats for some years now. I plan a miniaturized version of those systems. There are several <=5K BTU marine air units on the market that are designed for small boats without gensets. Exhaust water will be expelled overboard on the surface, and diverted through a keel cooler for submerged ops. Condensed water has to be scavenged. All these systems require space and power, SeaHunter has plenty of convenient battery space in those torpedo pods. A dedicated machinery space is a must.<br/><br/>Joe<a href="http://overview.mail.yahoo.com?.src=iOS"><br/><br/>Sent from Yahoo Mail for iPad</a></td></tr></table> <div id="_origMsg_">
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<span style="font-weight:bold">From:</span>
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swaters <swaters@waters-ks.com>; <br>
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<span style="font-weight:bold">To:</span>
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Personal Submersibles General Discussion <personal_submersibles@psubs.org>; <br>
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<span style="font-weight:bold">Subject:</span>
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Re: [PSUBS-MAILIST] Air conditioning <br>
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<span style="font-weight:bold">Sent:</span>
</b>
Mon, Apr 14, 2014 4:01:35 AM <br>
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<td valign="top"><div>I never did get to see their a/c system when we toured triton. I wish I would have. </div><div>Thanks,</div><div>Scott Waters</div><div><br></div><div><br></div><div><br></div><div><br></div><div><div style="font-size:75%;color:#575757;">Sent from my U.S. Cellular© Smartphone</div></div> <br>JimToddPsub@aol.com wrote:<br><font id="role_document" color="#000000" size="2" face="Arial">
<div>Joe,</div>
<div> </div>
<div>There have been several prior threads over the past few
years regarding non-compressor, onboard A-C systems such as modified ice
chests with computer fans. The cooling medium doesn't have to be
ice. It could even be steel bricks that have been cooled in a freezer or
in a container of dry ice if you're prepared to safely handle steel that's been
cooled to less that -109 F. Obviously the dry ice doesn't go into the
sub. You'll still get humidity reduction from the condensation on the
cooling medium.</div>
<div> </div>
<div>Triton, U-Boat Worx, and some others have onboard A-C systems that might
be compressor based. Maybe those who toured Triton can answer
that. I'd certainly like to see the specs on weight, capacity, battery
draw, etc. </div>
<div> </div>
<div>I don't plan on a mechanical system myself, but will depend on surface
cooling from a system on the tender. That's very similar to what Nuytco
uses. I'll use a small passive system onboard when necessary. </div>
<div> </div>
<div>Jim. </div>
<div> </div>
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<div>In a message dated 4/13/2014 9:16:59 P.M. Central Daylight Time,
josephperkel@yahoo.com writes:</div>
<blockquote style="PADDING-LEFT:5px;MARGIN-LEFT:5px;BORDER-LEFT:blue 2px solid;"><font style="BACKGROUND-COLOR:transparent;" color="#000000" size="2" face="Arial">
<div style="FONT-SIZE:14pt;FONT-FAMILY:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;COLOR:#000;BACKGROUND-COLOR:#fff;">
<div> <font size="3" face="Times New Roman"> </font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">Jon /Sean /
Jim,</font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">If I can simplify
the motor cooling with ambient water, all the better, I prefer the simplicity
of that method. But, I must, must, have air-conditioning! I must reduce cabin
humidity and temperature to comfortable levels, this is a manned steel drum in
the tropical sun! Plus, I want my electronics dry.</font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">My intent is to
isolate the machine space with a thermal bulkhead with the required lines and
piping routed through as appropriate. That machine space then force ventilated
to the outside in the sail for extended surface transits. I was figuring that
since I’m doing all this ventilating anyway that I would feed these outside
motor pods into this environment. But I do like the idea of keeping down the
number of thru hulls if I don’t need them and just use the passing
water.</font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">That bulkhead need
not be neither structural nor watertight, simply a thermal barrier with
manhole access to the goodies beyond. The space can be monitored with sensors
and video and a fire suppression system could be discharged without impacting
the occupants???</font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri"> </font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">Joe</font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div class="yahoo_quoted" style="DISPLAY:block;">
<div style="FONT-SIZE:14pt;FONT-FAMILY:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;">
<div style="FONT-SIZE:12pt;FONT-FAMILY:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;">
<div dir="ltr"><font size="2" face="Arial">On Sunday, April 13, 2014 10:11 PM, Jon
Wallace <jonw@psubs.org> wrote:<br></font></div>
<div class="y_msg_container">
<div id="yiv1355840777">
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<div class="yiv1355840777moz-cite-prefix"><br clear="none">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 clear="none"><br clear="none"><br clear="none">On 4/13/2014 8:45 PM, Joe Perkel
wrote:<br clear="none"></div>
<blockquote type="cite">
<div id="yiv1355840777yqt77375" class="yiv1355840777yqt4331699356">
<div style="FONT-SIZE:14pt;FONT-FAMILY:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;COLOR:rgb(0,0,0);BACKGROUND-COLOR:rgb(255,255,255);">
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">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></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">In looking at my
SeeHund replica, note that the torpedo/pod(s) length exceed needed battery
capacity. <span> </span>So the idea being that the aft ends of both
will house electric motors that are isolated from the battery
compartments.</font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">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> </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> </span>main induction and exhaust vents. <span> </span>All
this for continuous surface running of course. Submerged, the motor units
would be intermittent duty.</font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">The centerline
unit would be fully enclosed and not vented, therefore not as attractive for
continuous duty due to thermal constraints.</font></div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri"></font> </div>
<div><font size="3" face="Times New Roman"></font></div>
<div style="MARGIN:0in 0in 10pt;"><font size="3" face="Calibri">Joe</font></div>
<div><font size="3" face="Times New Roman"></font><br clear="none"></div></div></div><br clear="none">
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