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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Fun question!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I believe there is definitely a degree of misinformation here, but I see some potential for improving thermal comfort (not for reducing the supplied air temperature).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Let¡¯s run with the idea of this being applied in a very hot climate where you would otherwise have open windows to facilitate natural convection, and you have a substantial amount of other solar envelope conductive loads building as the day progresses (the graphic mentions a ¡°tin hut¡±).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>To start, this measure could substantially reduce direct solar gains through the opening (while introducing indirect conductive gains)... It might be more effective/simple to install a permanent shading device (or just board up the window), but we should consider this effect as part of the whole package.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>This assembly would also clearly restrict & reduce the quantity of natural convection that would otherwise occur with a totally free opening ¨C we have much less free area to work with. How hot the interior environment temperature climbs, and how quickly it gets there is dependent on a number of fixed and variable conditions, but this net reduction in air changes per hour, all things being equal, will likely result in ¡°cooling design day¡± temperatures rising at a faster rate and to a higher maximum as far as a drybulb thermostat inside the room would be concerned. Less air changes should result in a larger delta between inside and outside peak temperatures.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Independent of drybulb temperature measurements, there¡¯s one other ¡°saving grace¡± (perhaps more cynically, a means to fool someone into buying a product): If there exists a substantial pressure differential between the indoor space and outside environment (due to mechanical or natural wind driven forces pushing/sucking air through the opening), these ¡°nozzles¡± might produce a relatively higher <u>velocity</u> for a projected area in front of the window. I expect zero measurable effects on supply air or room air temperatures from this higher velocity, but someone standing in front of this device would enjoy improved evapotranspiration rates (sweat evaporation) due to the relative increase in air movement ¨C same reason we use circulating fans to improve thermal comfort. In a similar fashion, we do not expect space circulation fans to reduce room temperatures. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Would the combination of reduced direct solar gains, decreased air changes, and increased air velocity result in lowered space temperatures? <u>I highly doubt it</u>, unless the wall opening was sorely wanting for a shading means to begin with. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Could this combination of effects improve thermal comfort? Sure, under the right conditions (likely hinging on the hourly windspeed & prevailing direction). <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I¡¯m more interested to find out if flipped around this device could function as a creative ¡°howling windchime¡± and what that might sound like¡<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>~Nick<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#3A7A46'><img width=722 height=9 id="Picture_x0020_1" src="cid:image001.png@01D1DE72.0F405F50"><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#3A7A46'>Nick Caton, P.E.</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3A7A46'><o:p></o:p></span></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=724 style='width:543.0pt;border-collapse:collapse'><tr><td width=230 valign=top style='width:172.3pt;padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Senior Energy Engineer</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Energy and Sustainability Services</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> North America Operations</span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'> Schneider Electric</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></td><td width=291 valign=top style='width:218.3pt;padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>D </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>913.564.6361 </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>M </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>785.410.3317 </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>E </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="mailto:nicholas.caton@schneider-electric.com"><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>nicholas.caton@schneider-electric.com</span></a></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><br></span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#57B069'>F </span><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>913.564.6380</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></td><td width=203 valign=top style='width:152.4pt;padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#626469'>15200 Santa Fe Trail Drive<br>Suite 204<br>Lenexa, KS 66219<br>United States</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></td></tr><tr style='height:4.0pt'><td width=724 colspan=3 valign=top style='width:543.0pt;padding:0in 0in 0in 0in;height:4.0pt'><p class=MsoNormal style='mso-line-height-alt:4.0pt'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3A7A46'><img border=0 width=722 height=49 id="Picture_x0020_3" src="cid:image002.png@01D1DE72.0F405F50" alt="cid:image001.png@01D189AB.58634A10"></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#3A7A46'><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><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"'> Equest-users [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>???? via Equest-users<br><b>Sent:</b> Thursday, July 14, 2016 9:22 PM<br><b>To:</b> Equest-users<br><b>Subject:</b> [Equest-users] How do you think about the no electricityEco-Coolers from Bangladesh<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Recently,I read the news about the zero air cooler,<span style='font-size:10.5pt;font-family:"Verdana","sans-serif";color:black;background:white'>which is made with re-purposed plastic bottles.And the new claims that it helps reduce indoor temperature by 5 degrees centigrade.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Verdana","sans-serif";color:black;background:white'>The making process is shown as following:</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Verdana","sans-serif";color:black;background:white'><img border=0 width=571 height=466 id="_x0000_i1025" src="cid:image003.jpg@01D1DE72.0F405F50"></span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Verdana","sans-serif";color:black;background:white'><img border=0 width=592 height=359 id="_x0000_i1026" src="cid:image004.jpg@01D1DE72.0F405F50"></span><o:p></o:p></p></div><div><p class=MsoNormal>I dout that very much.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>the Joule-Thomson Coefficient for air (mostly nitrogen) at 300K (27¡ãC/80¡ãF) is about 0.36K/bar. This means that at 300K a 1bar change in pressure equates to a 0.22K. The change in pressure required to get the 5¡ãC (5K) reduction would therefore be:<span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#141414'><br><br><span style='background:#FCFCFF'>5 / 0.22 = 22.7bar</span></span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#141414;background:#FCFCFF'><img border=0 width=740 height=477 id="_x0000_i1027" src="cid:image005.jpg@01D1DE72.0F405F50"></span><o:p></o:p></p></div><div><p class=MsoNormal>So I think it is impossible the temperature drop will be up to 5 degrees centigrade after the air through the bottle.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>What do you think?<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>------------------ <o:p></o:p></p><div><div><div><div><p class=MsoNormal><strong><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#3366FF'>Yongqing Zhao</span></strong><span style='font-size:10.5pt;font-family:"Verdana","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><strong><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#006600'>Changsha Green Building & Energy Saving Technology CO.,LTD</span></strong><b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#006600'><br></span></b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#3366FF'>NO.438,Shaoshan Road,Changsha,Hunan,China<br>Telephone:13574805636</span><span style='font-size:10.5pt;font-family:"Verdana","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#3366FF'>Email:zhaoyongqing1987@126.com</span><span style='font-size:10.5pt;font-family:"Verdana","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'> <a href="mailto:503271081@qq.com">503271081@qq.com</a></span><span style='font-size:10.5pt;font-family:"Verdana","sans-serif";color:black'> <o:p></o:p></span></p></div></div></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><p class=MsoNormal><br>______________________________________________________________________<br>This email has been scanned by the Symantec Email Security.cloud service.<br>______________________________________________________________________<o:p></o:p></p></div></body></html>