[Equest-users] Equest-users Digest, Vol 85, Issue 18

[Sharad Kumar]

Hi Mayank,

Just try to figure this out.
As you would be knowing Q= U* A * delta T
Also this can be tasted as Q= (1/R) * A * delta T
So by considering these two formulas one can get the following results.I
have taken some assumptions.

[image: Inline image 2]

No the following charts may be obtained

[image: Inline image 4]
I think that these basic formulas rules simulation soft wares.
I have done these kind of analyses and i used to get very straight
proportional lines for the charts of energy consumption and U values so
,may be these are the formulas that rules eQUEST also.
Hence Dan can be also right from my point of view.
As of now i am considering these basic formulas and from my experience on
two projects energy consumption is directly proportional to U values. For
more help you can have a try on other advises given  to you in this forum.


Thanks,
Sharad.
Green Horizon Consulting LLP.
Gurgaon
India.

On Tue, Apr 28, 2015 at 1:32 AM, <equest-users-request at lists.onebuilding.org
> wrote:

> Send Equest-users mailing list submissions to
>         equest-users at lists.onebuilding.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
>
> or, via email, send a message with subject or body 'help' to
>         equest-users-request at lists.onebuilding.org
>
> You can reach the person managing the list at
>         equest-users-owner at lists.onebuilding.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Equest-users digest..."
>
> Today's Topics:
>
>    1. Re: [Bldg-sim] Expert advice on Wall Insulation   study in
>       eQuest (Daniel Knapp)
>
>
> ---------- Forwarded message ----------
> From: Daniel Knapp <danielk at arborus.ca>
> To: Mayank Bhatnagar <mayank.23aug at gmail.com>
> Cc: eQUEST Users List <equest-users at lists.onebuilding.org>
> Date: Mon, 27 Apr 2015 14:12:11 -0400
> Subject: Re: [Equest-users] [Bldg-sim] Expert advice on Wall Insulation
> study in eQuest
> Hi Mayank,
>
> 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:
>
> All the best,
> Dan
>
>
>
> —
> Daniel Knapp, PhD, PPhys, LEED® AP O+M
> danielk at arborus.ca
>
> Arborus Consulting
> Energy Strategies for the Built Environment
> www.arborus.ca
> 76 Chamberlain Avenue
> Ottawa, ON, K1S 1V9
> Phone: (613) 234-7178 ext. 113
> Fax: (613) 234-0740
>
>
>
>
> On Apr 27, 2015, at 6:15 AM, Mayank Bhatnagar <mayank.23aug at gmail.com>
> wrote:
>
> Thank you Joe and Daniel for your response.
>
> 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.
>
> For your reference, I am attaching inp, pd2 and weather file.
>
>
>
> On Thu, Apr 23, 2015 at 8:10 PM, Joe Huang <
> yjhuang at whiteboxtechnologies.com> wrote:
> Mayank, Daniel,
>
> 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.
> 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.
>
> 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.
>
> Joe
>
> Joe Huang
> White Box Technologies, Inc.
> 346 Rheem Blvd., Suite 205A
> Moraga CA 94556
> yjhuang at whiteboxtechnologies.com
> http://weather.whiteboxtechnologies.com for simulation-ready weather data
> http://www.whiteboxtechnologies.com
> (o) (925)388-0265
> (c) (510)928-2683
> "building energy simulations at your fingertips"
>
>
> On 4/23/2015 6:18 AM, Daniel Knapp wrote:
> Hi Mayank,
>
> 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.
>
> I would agree that the energy savings should saturate at some point.
>
> All the best,
> Dan
>
>
> —
> Daniel Knapp, PhD, PPhys, LEED® AP O+M
> danielk at arborus.ca
>
> Arborus Consulting
> Energy Strategies for the Built Environment
> www.arborus.ca
> 76 Chamberlain Avenue
> Ottawa, ON, K1S 1V9
> Phone: (613) 234-7178 ext. 113
> Fax: (613) 234-0740
>
>
>
>
> On Apr 23, 2015, at 5:00 AM, Mayank Bhatnagar <mayank.23aug at gmail.com>
> wrote:
>
> Hi Claire,
>
> Thanks for your response.
>
> 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.
>
> Please let me know if you need more information.
>
> Thanks
>
> Regards,
> Mayank
>
> On Thu, Apr 23, 2015 at 2:25 PM, Claire Das Bhaumik <claire at inklingllp.com>
> wrote:
> Mayank,
>
> I think we need to know a bit more about the building:
> - Location (some parts of India are cool, others hot!)
> - Building usage - office, domestic, retail? Hours of use?
> - Servicing - heating and cooling? Mechanical or natural vent?
>
> Regards,
>
> Dr Claire Das Bhaumik CEng FCIBSE
>
> Partner - Inkling LLP
>
>
> e: claire at inklingllp.com
>
> t:  07950 282800
>
> w: www.inklingllp.com
>
> Follow us on Twitter: @DasInkling
>
> Partnership No. OC367619
>
>
> On Thu, Apr 23, 2015 at 9:51 AM, Mayank Bhatnagar <mayank.23aug at gmail.com>
> wrote:
> Dear All,
>
> 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.
>
> Theoretically, the energy consumption should approach to stagnant with
> reduction in wall U-value.
>
> Please refer figure.
>
> Appreciate if anyone put light on this.
>
> Thank you.
>
> Regards,
>
> Mayank Bhatnagar
>
> Theoretical should come like this.
> <image.png>
>
> In eQuest the trend is-
> <image.png>
>
> _______________________________________________
> Bldg-sim mailing list
> http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to
> BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG
>
>
>
> _______________________________________________
> Equest-users mailing list
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to
> EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
> _______________________________________________
> Equest-users mailing list
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to
> EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
>
>
>
> _______________________________________________
> Equest-users mailing list
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to
> EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
>
> <Small Office Bldg_v5_4.pd2><Small Office Bldg_v5_4.inp>
> <IND_New.Delhi.421820_ISHRAE.BIN>
>
>
>
> _______________________________________________
> Equest-users mailing list
> Equest-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20150428/822c2991/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screen Shot 2015-04-27 at 2.11.17 PM.png
Type: image/png
Size: 26422 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20150428/822c2991/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 47103 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20150428/822c2991/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 13206 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20150428/822c2991/attachment-0002.png>