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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'>Without looking at the .inp file, the basic things that will increase your maximum load on a cooling coil in this case are (and vice versa for the heating coil); <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>lower supply air temperature set-point <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>higher entering mixed air enthalpy<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>or higher airflow across the coil if it is auto-sized<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'>The basic things that can increase your mixed air conditions are; <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l2 level1 lfo2'><![if !supportLists]><span style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>higher outside air enthalpy or return air enthalpy<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l2 level1 lfo2'><![if !supportLists]><span style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>higher quantity of outside air <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l2 level1 lfo2'><![if !supportLists]><span style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>higher space temperature (leading to a higher return 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'>And the basic things that can lower the supply air temperature in eQuest are (aside from just lowering it manually);<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo3'><![if !supportLists]><span style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Different control scheme selected (for cooling and heating coils, like SAT reset)<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo3'><![if !supportLists]><span style='font-size:11.0pt;font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Different unit operation (eQuest has a basic control scheme for each unit type that you can view in the help file)<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'>So, this leaves us with, most likely, different <u>unit operations</u> as the cause for the coil load increase. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The 4 pipe system would either cool or heat, but not both. Whereas the VAV system is maintaining a constant SAT of around 55 degF at all times, and reheating this air in the zones that need heat. This could explain why the heating load is much higher, because the system is heating 55 degree air (assuming no SA reset), instead of heating space air mixed with a little outdoor air. As for the cooling load being 20% higher, maybe the auto sized airflow rate of the system increased. Or the static pressure increased significantly causing a large heat gain across the fan and making the system have to cool to 52 degrees in order to get a 55 degree leaving air temp. Finally , perhaps the absence of a non-coincidental load is causing a higher peak, the fan coils may have not been on all at once at any time whereas the VAV system is at least cooling the minimum airflows to 55 degF at all times occupied.<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'>Hopes this helps you troubleshoot. Good luck!<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><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Joe Fleming<o:p></o:p></span></b></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#333333'>E.I., LEED AP BD+C, BEMP<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#333333'>Mechanical Engineer II<o:p></o:p></span></i></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#006363'>TLC Engineering for Architecture<br></span></b><b><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#006363'>Your 2030 Challenge Partner</span></b><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#006363'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>800 Fairway Drive, Suite 250<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Deerfield Beach, FL 33441-1816<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>phone: </span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>954-418-9096</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>fax: </span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>954-418-9296</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>direct: </span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>954-418-4591</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>website: </span><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.tlc-engineers.com/">www.tlc-engineers.com</a><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><a href="http://www.tlc-engineers.com/"><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";text-decoration:none'><img border=0 width=700 height=49 id="_x0000_i1027" src="cid:image001.gif@01CBC480.437DFFA0" alt="http://www.tlc-engineers.com/images/TLC_Sig_Loc_Block.gif"></span></a><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><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"'> Edward Kucirek [mailto:kucirekengineering@hotmail.com] <br><b>Sent:</b> Friday, February 04, 2011 3:25 PM<br><b>To:</b> Fleming, Joe; equest-users@lists.onebuilding.org<br><b>Subject:</b> RE: [BULK] [Equest-users] 4-Pipe Fan Coil vs. VAV<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>The load is that much higher. I am not looking at consumption. I am looking at SS-D.<br><br>Kevin Hupf, LEED AP<br><br></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>K</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>ucirek </span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>E</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>ngineering, </span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>I</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>nc.<br>7587 Main St.<br>Omaha, NE 68127<br>Ph: (402)951-0022<br>Fax: (402)951-0023<br>kucirekengineering@hotmail.com<br>www.kucirekengineering.com<br><br><br><br><o:p></o:p></span></p><div class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><hr size=2 width="100%" align=center id=stopSpelling></span></div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From: joe.fleming@tlc-eng.com<br>To: kucirekengineering@hotmail.com; equest-users@lists.onebuilding.org<br>Date: Fri, 4 Feb 2011 14:16:35 -0500<br>Subject: RE: [BULK] [Equest-users] 4-Pipe Fan Coil vs. VAV<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The cooling/heating "load" is that much higher or the "energy" is higher.</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><div><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Joe Fleming</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#333333'>E.I., LEED AP BD+C, BEMP</span></i><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#333333'>Mechanical Engineer II</span></i><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#006363'>TLC Engineering for Architecture<br></span></b><b><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#006363'>Your 2030 Challenge Partner</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>800 Fairway Drive, Suite 250</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Deerfield Beach, FL 33441-1816</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p></div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>phone: </span><o:p></o:p></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>954-418-9096</span><o:p></o:p></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>fax: </span><o:p></o:p></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>954-418-9296</span><o:p></o:p></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>direct: </span><o:p></o:p></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>954-418-4591</span><o:p></o:p></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;font-family:"Calibri","sans-serif";color:#333333'>website: </span><o:p></o:p></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.tlc-engineers.com/" target="_blank">www.tlc-engineers.com</a></span><o:p></o:p></p></td></tr></table><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><a href="http://www.tlc-engineers.com/" target="_blank"><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";text-decoration:none'><img border=0 width=700 height=49 id="ecx_x005f_x0000_i1025" src="cid:image001.gif@01CBC480.437DFFA0" alt="http://www.tlc-engineers.com/images/TLC_Sig_Loc_Block.gif"></span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><div><div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;border-color:-moz-use-text-color -moz-use-text-color'><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-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Edward Kucirek<br><b>Sent:</b> Friday, February 04, 2011 1:25 PM<br><b>To:</b> equest-users@lists.onebuilding.org<br><b>Subject:</b> [BULK] [Equest-users] 4-Pipe Fan Coil vs. VAV<br><b>Importance:</b> Low<o:p></o:p></span></p></div></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>I am running a simulation to compare various systems. When I run the 4-pipe fan coil and I look at SS-D I get a building load for heating and cooling with what it should be but when I use the same building and change the system to Standard VAV with HW and CW the building cooling load is 20% higher and the building heating load is 65% higher. Does anyone have any suggestions as why this would be happening?<br><br>Kevin Hupf, LEED AP <br><br></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>K</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>ucirek </span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>E</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>ngineering, </span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>I</span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>nc.<br>7587 Main St.<br>Omaha, NE 68127<br>Ph: (402)951-0022<br>Fax: (402)951-0023<br>kucirekengineering@hotmail.com<br>www.kucirekengineering.com<o:p></o:p></span></p></div></div></body></html>