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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=blue><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dear Adam,<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'>Unless you’re very tightly connected to SEMCO, you’ll have to invent the passive dehumidification part of the Pinnacle unit. I don’t think that SEMCO has published anything like tech performance data for that wheel. It is NOT a standard energy recovery wheel.<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 align=center style='text-align:center'><b><span style='font-size:13.5pt;color:#1F497D'>The Building Performance Team<br></span></b><b><span style='color:#1F497D'>James V. Dirkes II, P.E., LEED AP<br></span></b><span style='color:#1F497D'>1631 Acacia Drive NW<br>Grand Rapids, MI 49504<br>616 450 8653<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 style='margin-left:.5in'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> bldg-sim-bounces@lists.onebuilding.org [mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>hamnmegs@ozemail.com.au<br><b>Sent:</b> Monday, January 03, 2011 4:31 PM<br><b>To:</b> bldg-sim@lists.onebuilding.org; 'Adam Niederloh'<br><b>Subject:</b> Re: [Bldg-sim] Modeling different Energy Recovery Scenarios<o:p></o:p></span></p></div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;margin-left:.5in'>We have modelled similar systems by using traditional simulation to get the off-coil and on-coil conditions. We dump these to an hourly spreadsheet and model the psychrometrics there. We use the ASHRAE toolkit if wel feel necessary to model wet coils robustly etc. Many simulation programs assume a constant bypass (or contact) factor when in fact this is dynamic. I believe this is significnt to take into account with the types of systems decribed in humid climates. I haven't seen a simulation programe that can model your systems correctly but then I have only been exposed to EQuest (DOE-2.2), IES VE, TAS, HAP. I suspect TRNSYS may allow you to model it, but if you aren't already using it would you not be better off spending the time on a robust spreadsheet template ... good luck.<br>Regards,<br>Graham<br><br><b>On Tue Jan 4 5:24 , "Adam Niederloh" sent:</b><o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>All,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Happy New Year!<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I know that I recently asked the question shown below; however I did not receive any replies so I thought I would try again seeing as how it’s a brand new year. The question as previously asked: <o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I am curious to know what programs/methodologies people have used to effectively model the following types of energy recovery systems:<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:1.0in;text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><span style='mso-list:Ignore'>1.)<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Dual Wheel Heat Recovery with a Cooling Coil between the wheels. This system is similar to the SEMCO Pinnacle system. As the outdoor air travels through the air handler it passes first through a total energy wheel, then through a cooling coil and then through a passive dehumidification wheel. The exhaust air, as it leaves the building, travels through the passive dehumidification wheel and then the total energy wheel.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.75in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:1.0in;text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'><span style='mso-list:Ignore'>2.)<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Twice through Heat Recovery with a Cooling Coil in between the first and second pass. This system is similar to a DesertAire system. The outside air passes through the heat recovery device</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>, </span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>through a cooling coil</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>,</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> and then through the other side of the same heat recovery device thus pre-cooling the outdoor air and reheating the supply air.</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Please see the attached PDF for very simple schematic sketches of each option.<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks,<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'><o:p> </o:p></span></p><div><p class=MsoNormal style='margin-left:.5in'><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Adam</span><o:p></o:p></p></div><p class=MsoNormal style='margin-left:.5in'><span style='color:windowtext'><o:p> </o:p></span></p></div></body></html>