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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>It make think of the sign convention used in Thermodynamics. You
have the System and its Surroundings. Let’s say that the System is the
building. <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'>In Thermo, heat received by the system from its surroundings (cooling
load) is “positive”. The heat lost by the system to its surroundings
(heating load) is “negative”.<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'>It is the inverse for work.<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'>_____________<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Demba NDIAYE<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>
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<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>Pasha
Korber-Gonzalez<br>
<b>Sent:</b> Tuesday, May 04, 2010 5:25 AM<br>
<b>To:</b> Piyush Varma<br>
<b>Cc:</b> equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] Queries<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Piyush,<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal>I can help with 01., but I do not understand the concept of
alternating solar gain factor that you are referring too, or maybe I just don't
understand the question exactly.<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>For 01. I have always known the symbols of heating energy to
be referenced as (+) for cooling and (-) for heating although I can't give you
the exact reference this nomenclature comes from. In terms of the
positive for cooling energy it is a description for heat energy being present
in the conditioned space(s)/building in terms of heat energy being gained (or
generated.) Where the negative symbol is used to represent heating energy
this is describing that heat energy from the space/zone is being
lost via....whatever the mechanism (i.e. ext. wall or window conduction
losses, to exhaust air heat energy loss from the building, to infiltration
effects, etc.) <o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal>As long as you can keep your symbols managed with in your
own simulation work don't let this little quirk stop you from reporting your
numbers in your preferred format. It is good that you are asking
these types of detail questions so that you can ensure your own foundation of
understanding for the tools you use. This is what makes a good energy
simulator. Keep asking questions, this list is a HUGE benefit from
my experience.<o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'>pasha<o:p></o:p></p>
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<p class=MsoNormal>On Tue, May 4, 2010 at 2:55 AM, Piyush Varma <<a
href="mailto:varpiyush@gmail.com">varpiyush@gmail.com</a>> wrote:<o:p></o:p></p>
<p class=MsoNormal>Hi all, <o:p></o:p></p>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>I am an eQuest newbie and had 2 small queries which
hopefully would be answered.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>01. What's the logic behind eQuest giving positive (+ve)
Cooling Loads & (-ve) negative Heating Loads. (I made an Admittance Method
Algorithm & it gives me the opposite values, eQuest i.e. negative cooling
loads & +ve heating loads, have checked all sign convention...can't figure
out why? My algorithm simulates for Delhi's (India) climate predominantly,
cooling loads.<o:p></o:p></p>
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<div>
<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>02. I have asked this before...is there any library for data
of alternating solar gain factors, especially for Delhi, India. (As far as i
believe it does'nt take into account the alternating solar gain
factor...) <o:p></o:p></p>
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<div>
<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal>hope these get resolved soon, thanks in advance.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>Regards,<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>Piyush<o:p></o:p></p>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><br>
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<p class=MsoNormal><o:p> </o:p></p>
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