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Dan,<br>
<br>
Very good point! I didn't even think about this, i.e., that the
plot was against conductance and not resistance. <br>
Therefore, I would conclude that eQUEST is behaving properly.<br>
<br>
Joe<br>
<pre class="moz-signature" cols="90">Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
<a class="moz-txt-link-abbreviated" href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a>
<a class="moz-txt-link-freetext" href="http://weather.whiteboxtechnologies.com">http://weather.whiteboxtechnologies.com</a> for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"
</pre>
<div class="moz-cite-prefix">On 4/27/2015 11:12 AM, Daniel Knapp
wrote:<br>
</div>
<blockquote
cite="mid:8037401C-7E9B-4932-8C61-28D0D60E9316@arborus.ca"
type="cite">Hi Mayank,
<div class=""><br class="">
</div>
<div class="">I think on further reflection you are seeing exactly
what you should be seeing. The energy consumption should go down
linearly with the U-value. What does saturate is the energy
savings compared to insulation thickness or R-value which is
plotted as 1/U. Here is a graph of energy vs. U and energy vs R
for your building:</div>
<div class=""><br class="">
</div>
<div class="">All the best,</div>
<div class="">Dan</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""><img apple-inline="yes"
id="BF92CB2A-C210-4A66-AC36-237F522B1795" apple-width="yes"
apple-height="yes"
src="cid:part1.02020501.02080704@whiteboxtechnologies.com"
class="" height="244" width="663"></div>
<div class=""><br class="">
<div class="">—<br class="">
Daniel Knapp, PhD, PPhys, LEED® AP O+M<br class="">
<a moz-do-not-send="true" href="mailto:danielk@arborus.ca"
class="">danielk@arborus.ca</a><br class="">
<br class="">
Arborus Consulting<br class="">
Energy Strategies for the Built Environment<br class="">
<a class="moz-txt-link-abbreviated" href="http://www.arborus.ca">www.arborus.ca</a><br class="">
76 Chamberlain Avenue <br class="">
Ottawa, ON, K1S 1V9 <br class="">
Phone: (613) 234-7178 ext. 113<br class="">
Fax: (613) 234-0740<br class="">
<br class="">
<br class="">
<br class="">
</div>
<br class="">
<blockquote type="cite" class="">On Apr 27, 2015, at 6:15 AM,
Mayank Bhatnagar <<a moz-do-not-send="true"
href="mailto:mayank.23aug@gmail.com" class="">mayank.23aug@gmail.com</a>>
wrote:<br class="">
<br class="">
Thank you Joe and Daniel for your response.<br class="">
<br class="">
As you suggested, I checked LS-C report for wall conduction
variation w.r.t. U-value. It is also giving linear trend for
wall conduction. Additionally, I have done same analysis for
without internal loads (occupancy, lighting and equipment
load) as Joe indicated about the compounding effect. I
still get linear trend between the energy consumption and
U-value. <br class="">
<br class="">
For your reference, I am attaching inp, pd2 and weather file.<br
class="">
<br class="">
<br class="">
<br class="">
On Thu, Apr 23, 2015 at 8:10 PM, Joe Huang <<a
moz-do-not-send="true"
href="mailto:yjhuang@whiteboxtechnologies.com" class="">yjhuang@whiteboxtechnologies.com</a>> wrote:<br
class="">
Mayank, Daniel,<br class="">
<br class="">
I think it's a good idea to look at the component loads in the
LS-C reports, but I want to add some words of caution.<br
class="">
The loads (actually heat flows) shown in those reports are
calculated at the constant Reference Temperature, and
categorized as either heating or cooling if the total load of
the building that hour is negative or positive. These loads
are corrected when DOE-2 solves for the actual
room temperature based on simple UA-deltaT principles. If you
want the corrected wall loads, you need to get an hourly
report of the wall loads and then correct for the temperature
difference Troom - Treference.<br class="">
<br class="">
I'm not sure if this level of detail is warranted, though. I
also suspect there's some other compounding effect that's
giving you the results that you report.<br class="">
<br class="">
Joe<br class="">
<br class="">
Joe Huang <br class="">
White Box Technologies, Inc.<br class="">
346 Rheem Blvd., Suite 205A<br class="">
Moraga CA 94556<br class="">
<a class="moz-txt-link-abbreviated" href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a><br class="">
<a class="moz-txt-link-freetext" href="http://weather.whiteboxtechnologies.com">http://weather.whiteboxtechnologies.com</a> for simulation-ready
weather data<br class="">
<a class="moz-txt-link-freetext" href="http://www.whiteboxtechnologies.com">http://www.whiteboxtechnologies.com</a><br class="">
(o) (925)388-0265<br class="">
(c) (510)928-2683<br class="">
"building energy simulations at your fingertips"<br class="">
<br class="">
<br class="">
On 4/23/2015 6:18 AM, Daniel Knapp wrote:<br class="">
Hi Mayank,<br class="">
<br class="">
I recommend opening up the SIM file (you can do this by going
to Tools -> View Simulation Output) and looking at the LS-C
and LV-D reports. In the LS-C report you can find the
contribution to the peak heating and cooling loads that come
from the walls. From this you should be able to figure out how
the wall conduction is changing as a fraction of the peak
loads as you decrease the wall U-value. In the LV-D report
(scroll to the very end of it) there is a summary of the
U-values for each exterior surface. This might be a good place
to look to make sure that the effective U-values that eQUEST
is simulating are matching up with your expectations of what
the U-values should be.<br class="">
<br class="">
I would agree that the energy savings should saturate at some
point.<br class="">
<br class="">
All the best,<br class="">
Dan<br class="">
<br class="">
<br class="">
—<br class="">
Daniel Knapp, PhD, PPhys, LEED® AP O+M<br class="">
<a class="moz-txt-link-abbreviated" href="mailto:danielk@arborus.ca">danielk@arborus.ca</a><br class="">
<br class="">
Arborus Consulting<br class="">
Energy Strategies for the Built Environment<br class="">
<a class="moz-txt-link-abbreviated" href="http://www.arborus.ca">www.arborus.ca</a><br class="">
76 Chamberlain Avenue<br class="">
Ottawa, ON, K1S 1V9<br class="">
Phone: (613) 234-7178 ext. 113<br class="">
Fax: (613) 234-0740<br class="">
<br class="">
<br class="">
<br class="">
<br class="">
On Apr 23, 2015, at 5:00 AM, Mayank Bhatnagar
<a class="moz-txt-link-rfc2396E" href="mailto:mayank.23aug@gmail.com"><mayank.23aug@gmail.com></a> wrote:<br class="">
<br class="">
Hi Claire,<br class="">
<br class="">
Thanks for your response.<br class="">
<br class="">
The analysis has been done on an 8 hour operating office
building in New Delhi. The mechanical system is packaged
single zone system with electric resistance heating.<br
class="">
<br class="">
Please let me know if you need more information.<br class="">
<br class="">
Thanks<br class="">
<br class="">
Regards,<br class="">
Mayank<br class="">
<br class="">
On Thu, Apr 23, 2015 at 2:25 PM, Claire Das Bhaumik
<a class="moz-txt-link-rfc2396E" href="mailto:claire@inklingllp.com"><claire@inklingllp.com></a> wrote:<br class="">
Mayank,<br class="">
<br class="">
I think we need to know a bit more about the building:<br
class="">
- Location (some parts of India are cool, others hot!)<br
class="">
- Building usage - office, domestic, retail? Hours of use?<br
class="">
- Servicing - heating and cooling? Mechanical or natural vent?<br
class="">
<br class="">
Regards,<br class="">
<br class="">
Dr Claire Das Bhaumik CEng FCIBSE<br class="">
<br class="">
Partner - Inkling LLP<br class="">
<br class="">
<br class="">
e: <a class="moz-txt-link-abbreviated" href="mailto:claire@inklingllp.com">claire@inklingllp.com</a><br class="">
<br class="">
t: 07950 282800<br class="">
<br class="">
w: <a class="moz-txt-link-abbreviated" href="http://www.inklingllp.com">www.inklingllp.com</a><br class="">
<br class="">
Follow us on Twitter: @DasInkling<br class="">
<br class="">
Partnership No. OC367619<br class="">
<br class="">
<br class="">
On Thu, Apr 23, 2015 at 9:51 AM, Mayank Bhatnagar
<a class="moz-txt-link-rfc2396E" href="mailto:mayank.23aug@gmail.com"><mayank.23aug@gmail.com></a> wrote:<br class="">
Dear All,<br class="">
<br class="">
We are working on a national level research project in India.
A building envelope analysis is a part of this project. By
doing analysis, we have found a vague results in trend
(linearly downward) of reduction in energy consumption with
reducing wall U-value in eQUEST.<br class="">
<br class="">
Theoretically, the energy consumption should approach to
stagnant with reduction in wall U-value.<br class="">
<br class="">
Please refer figure.<br class="">
<br class="">
Appreciate if anyone put light on this.<br class="">
<br class="">
Thank you.<br class="">
<br class="">
Regards,<br class="">
<br class="">
Mayank Bhatnagar<br class="">
<br class="">
Theoretical should come like this.<br class="">
<image.png><br class="">
<br class="">
In eQuest the trend is-<br class="">
<image.png><br class="">
<br class="">
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<br class="">
<span
id="cid:320A6B87-EEB6-4B21-BE19-3B2BCACCC489@arborus.local"><Small
Office Bldg_v5_4.pd2></span><span
id="cid:7ACF7BE6-7211-46DC-BEF2-9657C626101D@arborus.local"><Small
Office Bldg_v5_4.inp></span><span
id="cid:83D30FC1-21E6-4B2F-9B68-CDD152037B4A@arborus.local"><IND_New.Delhi.421820_ISHRAE.BIN></span><br
class="">
</blockquote>
<br class="">
</div>
</blockquote>
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