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I've just heard bad things about any active slab cooling. If the humidity is high enough and your slab is cool enough, you will hit the dew point and have condensation. <div><div>If you have even throw rugs, you will start growing mold.</div><div>Air Conditioning is not just cooling, its dehumidification too.</div><div>Maybe the solar chillers could be used to supplement a heat pump system on a residential system?</div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: 12.0px Helvetica">www.osti.gov/bridge/servlets/purl/840264-Jp30yy/native/840264.pdf</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I just thought of something to add to the previous list of ways to help cool a home:</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Share walls & cooling systems (like apartments, duplexs, etc)</div></div><div><br></div><div> </div><div><br></div><div>Ray</div><div><br></div><div><br><div><div>On Aug 20, 2008, at 4:53 PM, Dana wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div class="Section1"><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I moved away from the humidity [ to SW Colorado] and yes we open up at night and close down during the day. <o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">OK how about a small chiller that cools the slab during the day. <o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">There are solar absorption chillers in the UL stage that I have heard about [not seen or used] recently.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><o:p> </o:p></span></p> <div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Thanks -<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Dana Orzel<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif""><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Great Solar Works, Inc<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">www.solarwork.com<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">E - <a href="mailto:dana@solarwork.com">dana@solarwork.com</a><o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">V - 970.626.5253<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">F - 970.626.4140<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">C - 970.209.4076<o:p></o:p></span></p> </div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><o:p> </o:p></span></p> <div> <div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal" style="margin-left:.5in"><b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt; font-family:"Tahoma","sans-serif""> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a> [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>R. Walters<br> <b>Sent:</b> Wednesday, August 20, 2008 4:33 PM<br> <b>To:</b> RE-wrenches<br> <b>Subject:</b> Re: [RE-wrenches] Summer cooling<o:p></o:p></span></p> </div> </div><p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p><p class="MsoNormal" style="margin-left:.5in">Hi Dana;<o:p></o:p></p> <div><p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">In-floor heating of a super insulated building is a great idea. In-floor cooling however, has some serious condensation problems and is not a good idea. <o:p></o:p></p> <div><p class="MsoNormal" style="margin-left:.5in">In earth Air duct systems can harbor mold and Legionaries' disease.<o:p></o:p></p> <div><p class="MsoNormal" style="margin-left:.5in">Here in Northern New Mexico we use adobes (lots of thermal mass) and open up to the cool night air. When I lived through Texas summers, you either ponied up for AC, went to your mountain home, or suffered.<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">You stated the first 2 steps: <o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">super insulate & increase thermal mass.<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Next ?? : <o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Reduce your cubic footage of air conditioned space.<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Reduce east & west glazing<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Grow overhanging deciduous trees on the East & West<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Use Fans<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Use some evaporative cooling if possible<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Use small High efficiency AC units (Sanjo?)<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Raise thermostat<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Use geothermal heat pumps<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Migrate?<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">?........<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in">Ray Walters<o:p></o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p> </div> <div><p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p> <div> <div><p class="MsoNormal" style="margin-left:.5in">On Aug 20, 2008, at 4:03 PM, Dana wrote:<o:p></o:p></p> </div><p class="MsoNormal" style="margin-left:.5in"><br> <br> <o:p></o:p></p> <div><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto; margin-left:.5in"><span style="font-family:"Arial","sans-serif"">I have always wanted to do a super insulated house design that had a large central masonry mass or floor slab with heat tubing that you could cool in the summer during the nighttime and solar heat in the winter with solar. Or an earth tube air duct system that you could pull cool night air through that would cool the slab. I built a Passive Annual Heat Storage home 16 years ago that kept the house at 68 F during the summer in western Washington. I was very comfortable. Any thoughts ?</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto; margin-left:.5in"><span style="font-family:"Arial","sans-serif""> </span><o:p></o:p></p> <div><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto; margin-left:.5in"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Thanks -</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto; margin-left:.5in"><span style="font-size:11.0pt;font-family:"Arial","sans-serif""> </span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto; margin-left:.5in"><span style="font-size:11.0pt;font-family:"Arial","sans-serif"">Dana Orzel</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto; margin-left:.5in"><o:p> </o:p></p> </div> </div> </div> </div> </div> </div> </div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">List sponsored by Home Power magazine</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">List rules & etiquette:</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="http://www.re-wrenches.org/etiquette.htm">http://www.re-wrenches.org/etiquette.htm</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Check out participant bios:</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">www.members.re-wrenches.org</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> </blockquote></div><br><div> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>R. Walters</div><div>Solarray.com<span class="Apple-tab-span" style="white-space:pre"></span></div><div>NABCEP # 04170442<span class="Apple-tab-span" style="white-space:pre"><span class="Apple-style-span" style="white-space: pre; "> </span></span></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span> </div><br></div></div></body></html>