Hi Sambhav,<br><br>I agree with Pasha's answer. When I read your email I was surprised that you have a reduction in occupancy between your base and proposed case. I don't think that's allowed, at least not by LEED, and I doubt by anyone else. What is the reason for that reduction?<br>
<br>Carol<br><br><div class="gmail_quote">On Wed, Jul 21, 2010 at 7:03 AM, Pasha Korber-Gonzalez <span dir="ltr"><<a href="mailto:pasha.pkconsulting@gmail.com">pasha.pkconsulting@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>Hi Sambhav,</div>
<div> </div>
<div>My first guess on this issue is that is has something to do with the controls that you've specified for the chilled water loop (i.e. load reset, or OA reset, etc.) Apparently you are seeing that your fans are the ones trying to satisfy the "call for cooling." But the bigger question is what are the cooling or chiller schedules that you have input for your plant systems vs. your air-side systems.</div>
<div> </div>
<div>My next guess is that with such a dramatic difference in fans, but not in cooling energy is that in one of the models you probably have a large number of hours of cooling not met (throttling hours out of range.) Have you checked your BEPS/U reports, SS-F, SS-R? Did you input your own schedules or did you use the default operation schedules from the program?</div>
<div> </div>
<div>As is always the case for simulation questions when you ask "what's going on?" the basic response is, "IT DEPENDS..." on so many variables that at this point you are the only one who knows which variables in your model you have (or have not) adjusted. </div>
<div> </div>
<div>Best way for us to try and offer insight or solutions is to upload your .pd2, .inp, and maybe even your weather file for us to run and look deeper into your model file for you. <br><br></div><div><div></div><div class="h5">
<div class="gmail_quote">On Wed, Jul 21, 2010 at 12:49 AM, sambhav tiwari <span dir="ltr"><<a href="mailto:tiwari.sambhav@gmail.com" target="_blank">tiwari.sambhav@gmail.com</a>></span> wrote:<br>
<blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;" class="gmail_quote">Hi All,<br> In on of my projects i was geeting the energy end results<br>for two cases<br>
<br> Cooling Fan<br>
Pump<br><br>1 Proposed Case 3627607 26,226,040<br> 59,369<br><br>2 Proposed Case2 3627295 12141210 59,369<br><br><br>This is a fctory hall of 72000sqft served by 2 air cooled screw chiller of 180TR<br>
<br>The difference in two cases is that in first case Proposed Case1 the<br>EPD was 38w/sqft and occupancy was 220 ,and in Proposed case2 EPD<br>was changed to 11w/sqft and Occupancy to 100, my doubt is that with<br>such a large variation in EPD and Occupancy why there is neligiable<br>
variation in cooling energy0.008% and zero variation in pump energy as<br>shown in above results although this is large variation in fan energy.<br><br>I was expecting that the energy in three of them Cooling Fan and Pump<br>
should have come down drasticaly it happened with fan but not with<br>cooling and pump.<br><br>Can anyone suggest some logic to this.<br><br>Thanks<br><font color="#888888">Sambhav Tiwari<br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Carol Gardner PE<br>
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