<p>Thanks Melissa, will try it and let you know the result.<br>
:-)</p>
<div class="gmail_quote">On Jan 23, 2014 9:23 PM, "Melissa Crowe" <<a href="mailto:MCrowe@engsolutions.com">MCrowe@engsolutions.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hala Jaber<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I’ll bet if you reduce your supply fan static pressure (to say 1”) the error will go away…… the problem is fan heat! Make the AHU a blow thru unit! <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"BankGothic Lt BT","sans-serif";color:#00b050"><img width="92" height="48" src="cid:image001.jpg@01CF1857.017E0090" alt="Description: Description: Description: Description: Description: cid:image003.jpg@01CCFDCE.40462190"></span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-family:"Andalus","serif";color:#004620">Melissa P. Crowe</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">, </span><span style="font-size:8.0pt;font-family:"Arial","sans-serif"">LEED AP</span><span style="font-size:8.0pt"> <br>
</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">Project Engineer</span><span style="font-size:10.0pt"> <u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">Engineered Solutions, Inc.</span><span style="font-size:9.0pt;font-family:"Arial","sans-serif""> <br>
6 Union St, Natick MA 01760 <br>508.647.9200 x225 (P) l 508.652.1936 (F)</span><span style="font-size:9.0pt"> <br><span style="color:#00682f"><a href="mailto:MCrowe@EngSolutions.com" target="_blank">MCrowe@EngSolutions.com</a></span> <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<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""> Hala Jaber [mailto:<a href="mailto:halajaber82@gmail.com" target="_blank">halajaber82@gmail.com</a>] <br>
<b>Sent:</b> Wednesday, January 22, 2014 4:44 PM<br><b>To:</b> James Hansen; <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> Re: [Equest-users] Baseline Fan power calculation<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">James,<u></u><u></u></p></div><div><p class="MsoNormal">Do you think that i can set the thermostat set point to 75 for baseline only, i think the baseline and proposed design should have the same indoor temp, if i can do that this will help since i dont have problem in this small amount of saving that may differ.<u></u><u></u></p>
</div><div><p class="MsoNormal">thank you james.<u></u><u></u></p></div></div><div><p class="MsoNormal" style="margin-bottom:12.0pt"><u></u> <u></u></p><div><p class="MsoNormal">On Thu, Jan 23, 2014 at 12:38 AM, James Hansen <<a href="mailto:JHANSEN@ghtltd.com" target="_blank">JHANSEN@ghtltd.com</a>> wrote:<u></u><u></u></p>
<div><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">If it was me, I'd just set the space temperature to 75 degrees, knowing that the difference between that and 71.6 degrees probably won't make a huge difference in the savings between baseline and proposed.</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I thought I remember seeing something from Jeff Hirsch a while back that showed how to de-activate this particular alarm so that the model would run??</span><u></u><u></u></p>
<div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#4d4f53">GHT Limited</span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">James Hansen, PE, LEED AP, BEMP</span></b><u></u><u></u></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">Senior Associate</span></b><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">1110 N. Glebe Road, Suite 300</span></b><u></u><u></u></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">Arlington, VA 22201</span></b><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">703.243.1200 (main)</span></b><u></u><u></u></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">703.338.5754 (direct/cell)</span></b><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="http://www.ghtltd.com" target="_blank"><b><span style="font-size:10.0pt;color:#c4ba00;text-decoration:none">www.ghtltd.com</span></b></a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p></div><div style="border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;border-color:currentColor currentColor">
<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""> Hala Jaber [mailto:<a href="mailto:halajaber82@gmail.com" target="_blank">halajaber82@gmail.com</a>] <br>
<b>Sent:</b> Wednesday, January 22, 2014 4:30 PM<br><b>To:</b> James Hansen; <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> Re: [Equest-users] Baseline Fan power calculation</span><u></u><u></u></p>
</div><div><div><p class="MsoNormal"> <u></u><u></u></p><div><div><p class="MsoNormal">Dear James, thank you, but i have already set the warmest rest temp as required by section G3.1.3.12 supply air temerature reset, but still i have the problem in the 20 degree difference between the 71.6 and the cooling coil supply temp.<u></u><u></u></p>
</div><div><p class="MsoNormal">I hope if this clarify more my question.<u></u><u></u></p></div><div><p class="MsoNormal"> <u></u><u></u></p><p><span style="font-family:"Arial","sans-serif";color:#3333ff">Hala Jaber.</span><u></u><u></u></p>
<p><span style="font-family:"Arial","sans-serif";color:#3333ff">Sustainable Design Engineer.; LEED AP BD +C .</span><u></u><u></u></p><p><span style="font-family:"Arial","sans-serif";color:#3333ff">+962-79-7570197</span><u></u><u></u></p>
<p><span style="font-family:"Arial","sans-serif";color:#3333ff">email: </span><span style="font-family:"Arial","sans-serif";color:#222222"><a href="mailto:halajaber82@gmail.com" target="_blank"><span style="color:#3333ff">halajaber82@gmail.com</span></a></span><u></u><u></u></p>
<div><p class="MsoNormal">On Wed, Jan 22, 2014 at 11:57 PM, James Hansen <<a href="mailto:JHANSEN@ghtltd.com" target="_blank">JHANSEN@ghtltd.com</a>> wrote:<u></u><u></u></p><div><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">System 8 has a main AHU that feeds parallel fan powered VAV boxes. For your main AHU, you need to make sure your cooling reset temperature for supply air (LAT) is set to "warmest".</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#4d4f53">GHT Limited</span><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">James Hansen, PE, LEED AP, BEMP</span></b><u></u><u></u></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">Senior Associate</span></b><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">1110 N. Glebe Road, Suite 300</span></b><u></u><u></u></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">Arlington, VA 22201</span></b><u></u><u></u></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">703.243.1200 (main)</span></b><u></u><u></u></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#0c3844">703.338.5754 (direct/cell)</span></b><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="http://www.ghtltd.com" target="_blank"><b><span style="font-size:10.0pt;color:#c4ba00;text-decoration:none">www.ghtltd.com</span></b></a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span><u></u><u></u></p><div style="border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;border-color:currentColor">
<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""> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>Hala Jaber<br>
<b>Sent:</b> Wednesday, January 22, 2014 3:56 PM<br><b>To:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> [Equest-users] Baseline Fan power calculation</span><u></u><u></u></p>
</div><p class="MsoNormal"> <u></u><u></u></p><div><div><div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thanks James,but what do you mean by LAT, in addition to the fact that i<br>
have modeled the chilled water supply temperature reset as per the<br>requirement the rest based on outdoor dry bulb temp using :44 F at 80 f and<br>above, 54 f at 60 f and below, so how can i compromise this since the<br>
actual thermostat cooling set point is 71.6, and i don't have AHU in<br>baseline, its system 8.<br>Thanks alot</span><u></u><u></u></p><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#222222"> </span><u></u><u></u></p>
</div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#222222">-- </span><u></u><u></u></p><div><p><span style="font-family:"Arial","sans-serif";color:#3333ff">Hala Jaber.</span><u></u><u></u></p>
<p><span style="font-family:"Arial","sans-serif";color:#3333ff">Sustainable Design Engineer.; LEED AP BD +C .</span><u></u><u></u></p><p><span style="font-family:"Arial","sans-serif";color:#3333ff">+962-79-7570197</span><u></u><u></u></p>
<p><span style="font-family:"Arial","sans-serif";color:#3333ff">email: </span><span style="font-family:"Arial","sans-serif";color:#222222"><a href="mailto:halajaber82@gmail.com" target="_blank"><span style="color:#3333ff">halajaber82@gmail.com</span></a></span><u></u><u></u></p>
</div></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><u></u><u></u></p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">On Jan 22, 2014 8:24 PM, "James Hansen" <<a href="mailto:JHANSEN@ghtltd.com" target="_blank">JHANSEN@ghtltd.com</a>> wrote:<br>
<br>> If your CHW supply temp is 44F, and your LAT setpoint for the AHU is 51.6,<br>> then you are 6F higher. Check your reset schedules - if you allow reset<br>> for CHW without also allowing reset for the AHU (both per ASHRAE), you may<br>
> have a condition where the CHW supply is within 6 degrees of your LAT.<br>><br>><br>><br>> GHT Limited<br>></span><u></u><u></u></p></div></div><div><p class="MsoNormal">> *James Hansen, PE, LEED AP, BEMP*<br>
><br>> *Senior Associate*<br>><br>> *1110 N. Glebe Road, Suite 300*<br>><br>> *Arlington, VA 22201*<br>><u></u><u></u></p></div><p class="MsoNormal">> *<span style="font-size:10.0pt;background:white"> 703.243.1200</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> (main)*<br>
><br>> *</span><span style="font-size:10.0pt;background:white"> 703.338.5754</span><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> (direct/cell)*<br>><br>> *</span><a href="http://www.ghtltd.com/" target="_blank"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">www.ghtltd.com</span></a><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">* <</span><a href="http://www.ghtltd.com/" target="_blank"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">http://www.ghtltd.com</span></a><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">></span><u></u><u></u></p>
</div><div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#500050"> </span><u></u><u></u></p></div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#500050">> Hey eQuest users,<br>
> I have a new challanging requirement in the appendix G section G3.1.2.8,<br>> its required the supply air-to room air cooling temperature difference is<br>> 20 degrees for each HVAC system. Now my question is how can i achieve this<br>
> if my baseline is system 8 and the chilled water leaving temperature is<br>> specified 44 F with return delta t=12,at the same time that in my design<br>> the indoor thermostat temp=71.6 F , and the supply cooling temp should be<br>
> 51.6F, here when i set this value i got an error in eQuest stating that"<br>> the cooling coil leaving temperatures must be at least 6 F higher than<br>> entering water temp" and when i set the cooling supply air temp</span><u></u><u></u></p>
</div><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#500050"> </span><u></u><u></u></p></div><p class="MsoNormal"> <u></u><u></u></p></div></div></div></div>
</div><p class="MsoNormal"><br><br><br>-- <u></u><u></u></p><div><p><span style="color:#3333ff">Hala Jaber.</span><u></u><u></u></p><p><span style="color:#3333ff">Sustainable Design Engineer.; LEED AP BD +C .</span><u></u><u></u></p>
<p><span style="color:#3333ff">+962-79-7570197</span><u></u><u></u></p><p><span style="color:#3333ff">email: </span><a href="mailto:halajaber82@gmail.com" target="_blank"><span style="color:#3333ff">halajaber82@gmail.com</span></a><u></u><u></u></p>
</div></div></div></div></div></div></div></div><p class="MsoNormal"><br><br clear="all"><br>-- <u></u><u></u></p><div><p><span style="color:#3333ff">Hala Jaber.</span><u></u><u></u></p><p><span style="color:#3333ff">Sustainable Design Engineer.; LEED AP BD +C .</span><u></u><u></u></p>
<p><span style="color:#3333ff">+962-79-7570197</span><u></u><u></u></p><p><span style="color:#3333ff">email: </span><a href="mailto:halajaber82@gmail.com" target="_blank"><span style="color:#3333ff">halajaber82@gmail.com</span></a><u></u><u></u></p>
</div></div></div></div></blockquote></div>