<html><body bgcolor="#FFFFFF"><div>If you haven't done this already, I would suggest comparing the other annual end-uses for the models as well.</div><div><br></div><div>If cooling is the only one varying then you have some questions about specific inputs. (equip efficiency, infiltration, etc.)</div><div><br></div><div>However, if all of the end-uses are varying between the two models then you'll have a wider group of inputs to consider. (internal gains, occupancy, envelope construction, etc., plus those above.)</div><div><br>-DSE<div><br></div><div>Sent from my iPhone</div></div><div><br>On Feb 16, 2011, at 5:07 AM, Chris Yates <<a href="mailto:chris.malcolm.yates@gmail.com">chris.malcolm.yates@gmail.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>
Vaibhav <br>
<br>
Sorry to nit pick... don't you mean kWh/sq.m/year?<br>
<br>
It's difficult to say what you're discrepancy comes from without
having the models.<br>
All I can recommend is reviewing both model's results at
successively deeper levels detail. You've already covered the first
level of detail - the cooling consumption doesn't match. <br>
Your next courses of action may be: <br>
<ol>
<li>Review monthly consumption<br>
</li>
<li>I haven't used equest but assume you can review <b>hourly </b>air
temps and loads, so compare these next.</li>
<li>Solar gain</li>
</ol>
Are your figures based on zone demand or plant? You've got quite a
few layers to compare.<br>
<br>
Cheers<br>
<br>
Chris<br>
<br>
On 16/02/2011 06:49, Vaibhav Jain wrote:
<blockquote cite="mid:AANLkTi=RbRm7SfhSBVd7OQus3Q5xZc+BZumitnW3VT2D@mail.gmail.com" type="cite">Hello,
<div><br>
We are trying to compare cooling energy consumption of a typical
office building model in EnergyPlus and eQUEST. Simulation model
is a simple 5 zone model with PTAC system. Climate is New Delhi.
Heating consumption is near zero in both the models. We tried
our best to closely match models in these two software. The
result says, cooling electricity consumption/sq.m./year is
about- 35 KW/sq.m./year (in Energyplus) and 100 KW/sq.m./year
(in Equest). Some of the guidelines says that cooling
consumption should be around 100-120KW/sq.m./year. Is this
correct? Does any one has come across this phenomenon.<br>
<br>
Why EnergyPlus is giving very less consumption as compared to
Equest or references?</div>
<div><br>
</div>
<div>Thanks & regards,</div>
<div>Vaibhav Jain</div>
<div><br>
</div>
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<div>
<p>Chris Yates <span style="color: rgb(79, 98, 40);">C Eng
MCIBSE</span></p>
<p><i style="">Building Physics Consultant<o:p></o:p></i></p>
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