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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'>Chris, thanks for the help! <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'>I agree with what you are saying, the REFG-ZONE-LOAD is the load the space imparts on the refrigeration case, but that is also the same load the case imparts on the space, hence the ‘free cooling’.<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'>Thanks again for confirming the negative number in this keyword! <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><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Yoni G. Pollak, PE</span><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:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>(T) 770-622-2270</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p></div><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"'> Chris Jones [mailto:cj@enersave.ca] <br><b>Sent:</b> Monday, August 06, 2012 1:52 PM<br><b>To:</b> ypollak@gtp-eng.com; equest-users@lists.onebuilding.org<br><b>Cc:</b> equest-users@lists.onebuilding.org; Curt Hepting<br><b>Subject:</b> RE: [Equest-users] Refrigeration Modeling (2) - Zone Load<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am rethinking my interpretation of the REFG-ZONE-LOAD - I know believe the manual means "the load on the case work due to heat gain from the adjacent space" - the larger ( larger in the negative direction ) the zone load, the move compressor is used. The reciprocal, heat loss in the space due to the coolness "spilling out of the cases" is not taken into account by the program. Therefore the larger the negative number, the more there is "heat" in the space and the higher the unmet cooling hours. Just a guess but if you fix the REFG-ZONE-LOAD and change the space temperature you achieve the same effect - lower the space heating temperature set point, the lower the unmet cooling hours. If that is the case, then I suspect that the space somehow sees the zone load as increase in heat in the space?<br><br>This would indicate that there are other REFG keywords that might influence the heat gain to the space due to the compressor working harder when REFG-ZONE-LOAD is larger. <br><br><br><br>At 10:33 AM 06/08/2012, Yoni Pollak wrote:<br><br><o:p></o:p></p><p class=MsoNormal>Chris,<br> <br>You might be right about that heat ending up in the space, but that doesn’t sound right to me. I was getting an error when REFG-AUK-KW was 0, so I reset it. I’ve actually played around with that number quite a bit since it seems to have a large impact on the energy consumption. I’ll revisit it again this morning. <br> <br>I’m talking aboiut umnet cooling load hours. The REFG-ZONE-LOAD keyword seems to be directly related to my space loads but in the opposite way I thought. The more REFG-ZONE-LOAD, the more system cooling the space requires. <br> <br> <br> <br>Yoni G. Pollak, PE<br>(T) 770-622-2270<br> <br><b>From:</b> Chris Jones [<a href="mailto:cj@enersave.ca"> mailto:cj@enersave.ca</a>] <br><b>Sent:</b> Saturday, August 04, 2012 12:15 PM<br><b>To:</b> <a href="mailto:ypollak@gtp-eng.com">ypollak@gtp-eng.com</a>; <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br><b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> Re: [Equest-users] Refrigeration Modeling (2) - Zone Load<br> <br>There are a number of other REFG- keywords that depend on REFG-ZONE-LOAD. For example:<br>REFG-AUK-KW - takes three entries (order corresponds to REFG-ZONE-LOAD) of the fractional rated capacity of lights, fans, anti-sweat heaters - the default is 40% of the REFG-ZONE-LOAD - I am not entirely sure but I believe this heat ends up in the space. <br><br>Also, do you mean the unmet load hours are cooling load unmet or heating load unmet?<br> <br><br><br>At 10:21 AM 03/08/2012, Yoni Pollak wrote:<br><br>Content-Type: multipart/alternative;<br> boundary="----=_NextPart_000_0096_01CD7161.C28847D0"<br>Content-Language: en-us<br><br>Hi All,<br> <br>Has anyone had experience modeling refrigeration cases? I posted a question the other day but this one is different.<br> <br>So under Air-Side HVAC Zone Parameters > Refrigeration Tab, Zone Load (REFG-ZONE-LOAD) I entered the free cooling affect from the refrigeration cases to the space (as described in the key word help). But looking at the SIM file, this parameter is increasing my zone loads rather than decreasing them, and in fact is causing my space to have more unmet load hours. Should I apply a negative number to this parameter, or is this parameter not the ‘free cooling’ affect. <br> <br> <br>That along with the Walkin Box Load under the Air-Side HVAC System Parameter. Not sure how the program is using this value.<br> <br>Thanks!<br> <br> <br><b> <br> <br>Yoni G. Pollak, P.E.<br></b>Mechanical Engineer<br> <br><b>GTP Consulting Engineers, Inc<br></b><i>4197 Pleasant Hill Rd <br>Suite 200<br>Duluth, GA 30096<br>(770) 622-2270<br></i><a href="mailto:ypollak@gtp-eng.com">ypollak@gtp-eng.com</a><br><b> <br> <br> <br></b> <br>_______________________________________________<br>Equest-users mailing list<br><a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a> <br>To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><br><br>>><br>Christopher Jones, P.Eng.<br>Suite 1801, 1 Yonge Street<br>Toronto, ON M5E1W7<br>Tel. 416-203-7465<br>Fax. 416-946-1005<br>email <a href="mailto:cj@enersave.ca">cj@enersave.ca</a><o:p></o:p></p><p>>><br>Christopher Jones, P.Eng.<br>Suite 1801, 1 Yonge Street<br>Toronto, ON M5E1W7<br>Tel. 416-203-7465<br>Fax. 416-946-1005<br>email <a href="mailto:cj@enersave.ca">cj@enersave.ca</a><o:p></o:p></p></div></body></html>