<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt"><div id="yiv0876764487"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-size: 10pt; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;"><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636" style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;">Hi Psubbers,</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">Has anyone looked at thermoelectric coolers (peltier devices) for air conditioning / dehumidifying & heating.</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">I'm hopeful someone might be able to save me a bit of research.</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636"><a
href="http://en.wikipedia.org/wiki/Thermoelectric_cooling">http://en.wikipedia.org/wiki/Thermoelectric_cooling</a></div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">For those who aren't familiar, t<span style="font-size: 10pt;">hey are normally used to cool small units like computers, electrical cabinets & chili bins.</span></div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">They are about 1&1/2" square & 1/8" thick with two wires coming off them. </div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">The unit I have is 60W & operates off 12-15V. When powered up, one side gets hot & the other cold.</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">The cooling effectiveness is regulated by how well you can dissipate the heat from the hot side.</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">In the submersible application the hull can act as the heat sink. By
switching polarity you have a heater.</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">The down side is that you use about 3 times more power for cooling than traditional refrigeration units, </div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">however an air conditioning unit is bulky, & it would be a trade off between the additional battery size & expense</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">to run the peltier cooler as apposed to the bulk & expense of an air conditioning unit & it's associated through</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">hull heat exchange unit .</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">The heating faze is more economical. </div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">G.L. require air conditioning & humidity control in submersibles.</div><div
id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">Thanks</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636">Alan</div><div id="yiv0876764487yui_3_13_0_ym1_1_1394052030902_6636" style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif;"></div></div></div></div></div></body></html>