I'm sure most of us have stories about mis-understandings between the LEED reviewer and energy modeler. I must resist the urge to speak negatively about them , but I have received many comments that show lack of understanding of very basic modeling procedures. Anyone reading this forum will also note that many users have similar issues. I would expect this from beginners , but at the same time I would expect someone providing third party review to be more knowledgeable about energy simulation.<br>
<br>These type of questions are probably at the root of USGBC's reasoning for bringing the review process back in house.<br><br>Does anyone know of a list where we could post review comments and our solutions to the more common questions?<br>
<br>I found an older post from Scott at DOE2.com that explains everything. Since this is a developers explanation you could use it in your response. I wish there was a way to distribute this to every LEED review team so we can stop getting this question.<br>
<br>"<br><pre>From: Scott Criswell [mailto:<a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">scott.criswell at doe2.com</a>] <br>Sent: Tuesday, October 27, 2009 11:09 AM<br>To: Rosenberg, Michael I<br>
Cc: ashu gupta; Nick Caton; Crockett, Jim; Kendra Tupper;<br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">bldg-sim at lists.onebuilding.org</a><br>Subject: Re: [Bldg-sim] Ashrae 90.1 - Unmet hours<br>
<br> <br><br>I can confirm Mike's understanding of the DOE-2/eQUEST results. To get<br>the correct number of hours of unmet loads, people should MULTIPLY the<br>Percent hours outside throttling range from BEPS or BEPU by the total<br>
annual "hours fans on" listed in report SS-E.<br><br>One other comment re: Ashu's write-up - I believe that (for<br>DOE-2/eQUEST) a zone temperature has to be more than one degree outside<br>the throttling range for that hour to be counted as an hour outside<br>
throttling range. So for a zone with a heating thermostat setpoint of<br>72 and a 2 degree throttling range (=> 71-73 degree "throttling range"),<br>the zone temperature would have to be LESS THAN 70 in order for that<br>
hour to be counted.<br><br>related info -<br>We are contemplating a change to the Air-Side HVAC Summary view in the<br>eQUEST interface to report this total number of hours as opposed to just<br>the percent in the totals section at the bottom of the report.<br>
We have also just in the past several days (thanks to the efforts of<br>Steve Gates) added precision to the percent hours outside throttling<br>range reported on BEPS & BEPU and ALSO added separate reporting of hours<br>
any zone is either under cooled or under heated, intended for reporting<br>to LEED submission templates. Assuming no further changes (which is<br>certainly not out of the question), future releases of DOE-2/eQUEST will<br>
report the following in the BEPS & BEPU reports:<br> PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF THROTTLING RANGE =<br>4.45<br> PERCENT OF HOURS ANY PLANT LOAD NOT SATISFIED =<br>0.00<br>
HOURS ANY ZONE ABOVE COOLING THROTTLING RANGE =<br>98<br> HOURS ANY ZONE BELOW HEATING THROTTLING RANGE =<br>25<br><br>- Scott<br></pre><br clear="all">Thomas Serra<br>Project Manager<br>
EMO Energy Solutions, LLC<br>3141 Fairview Park Drive, Suite 450<br>Falls Church, VA 22042<br>voice 703-205-0445 ex-113<br>fax 703-205-0449<br><br>