[Equest-users] Ground temperatures

[Simge Andolsun]

Kapil hi! :) Great to hear from you!
Dear Joe and Nick,

Thanks for all your responses.

I actually know what's happening to the ground temperatures in DOE-2, how
they are used in ground heat transfer calculations and their effect on
overall building energy consumption. I just wanted to know how to make
eQuest plot these temperatures for me. Thanks to y'all, I managed to do it.
But, thank you so much for responding with this much detail!

Best Regards,
Simge Andolsun, PhD.


On Thu, Oct 24, 2013 at 5:34 PM, Kapil Upadhyaya <KapilU at kirksey.com> wrote:

>  Simge,****
>
> Do keep in mind that in DOE2 these are fixed monthly averages used for all
> hours of the month; these are derived by the ground reaching
> monthly-average outside air temperature at a lag of 3 months.****
>
> ** **
>
> Ground Temperature will have little effect on loads/energy in Houston for
> typical buildings. If you are simulating geothermal heat exchange or
> radiant heating (thru slab-on-grade),  then the investigation will be time
> worth spent.****
>
> ** **
>
> Best, ****
>
> ** **
>
> *Kapil Upadhyaya, LEED AP*
> Associate****
>
> *Kirksey* | Architecture
> 6909 Portwest Drive  |  Houston Texas 77024  |  www.kirksey.com
> o  713 426 7508  |  f  713 850 7308  |  kapilu at kirksey.com****
>
> *2012-2013 Firm of the Year *
> Texas Society of Architects****
>
> ** **
>
> *From:* Nick Caton [mailto:ncaton at smithboucher.com]
> *Sent:* Thursday, October 24, 2013 2:55 PM
> *To:* Joe Huang; equest-users at lists.onebuilding.org
>
> *Subject:* Re: [Equest-users] Ground temperatures****
>
>  ** **
>
> I haven’t tried Joe’s suggested tool (yet), but here’s the hourly report
> variable you’re looking for:****
>
> ****
>
> (Rankine conversion reference)<http://en.wikipedia.org/wiki/Rankine_scale>
> ****
>
> ** **
>
> You get here double clicking one of the hourly report items in the
> component tree under the “project and site” tab.  You can view the results
> by running the simulation then either opening the resulting .csv in the
> project directory or clicking the “hourly results” button on the top right
> of the “detailed results viewer,” which opens the same file.  Within that
> file scroll to the far right to check out any custom report variables
> you’ve included for the project.****
>
> ** **
>
> Such an hourly report builds upon Joe’s observation – it appears the
> monthly ground temperatures are averaged into 12 values over the year, then
> applied to each month on an hourly basis for the simulation.  I can’t speak
> to whether this is a trait specific to eQuest and/or the DOE-2 engine.****
>
> ** **
>
> ~Nick****
>
> ** **
>
> [image: cid:489575314 at 22072009-0ABB]**
>
> * *
>
> *NICK CATON, P.E.*
>
> SENIOR ENGINEER****
>
> ** **
>
> Smith & Boucher Engineers****
>
> 25501 west valley parkway, suite 200****
>
> olathe, ks 66061****
>
> direct 913.344.0036****
>
> fax 913.345.0617****
>
> www.smithboucher.com* *****
>
> ** **
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Joe Huang
> *Sent:* Thursday, October 24, 2013 2:18 PM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Ground temperatures****
>
> ** **
>
> Correction to previous e-mail, meant to say
>
> "By the way, I think that DOE-2 should do some smoothing or interpolation
> of the monthly ground temperatures; right now if you look at ..."
>
> Joe****
>
> Joe Huang****
>
> White Box Technologies, Inc.****
>
> 346 Rheem Blvd., Suite 108D****
>
> Moraga CA 94556****
>
> yjhuang at whiteboxtechnologies.com****
>
> http://weather.whiteboxtechnologies.com for simulation-ready weather data****
>
> (o) (925)388-0265****
>
> (c) (510)928-2683****
>
> "building energy simulations at your fingertips"****
>
>
> On 10/24/2013 12:15 PM, Joe Huang wrote: ****
>
> In my opinion, the easiest way to get the ground temperatures would not be
> through DOE-2 Hourly Reports, although I'm sure that can be done, but by
> reading them from the weather file using the WTHFMT2 utility program that
> converts the file from binary to text.  There are just 12 numbers for
> monthly ground temperatures, shown on line 2 of the *.FMT files.  By the
> way, I think that DOE-2 does some smoothing or interpolation of the monthly
> ground temperatures; right now if you look at the hourly heat transfer
> through Underground walls or floors, you'll see a wierd staircase effect
> with the same load for a whole month, and then a jump to a different load
> the next month, etc.
>
> Joe****
>
> Joe Huang****
>
> White Box Technologies, Inc.****
>
> 346 Rheem Blvd., Suite 108D****
>
> Moraga CA 94556****
>
> yjhuang at whiteboxtechnologies.com****
>
> http://weather.whiteboxtechnologies.com for simulation-ready weather data****
>
> (o) (925)388-0265****
>
> (c) (510)928-2683****
>
> "building energy simulations at your fingertips"****
>
>
> On 10/24/2013 11:05 AM, Simge Andolsun wrote: ****
>
> Dear eQuest Users,****
>
>  ****
>
> Would you please let me know which report would give me the deep ground
> temperatures used in ground heat transfer calculations of eQuest? I used to
> select an hourly report variable to make DOE-2.1e report these values, but
> I am not sure how to get these values from eQuest. Would you help me with
> this?****
>
>  ****
>
> Thank you very much in advance for your help,****
>
> Best Regards,****
>
>  ****
>
> Simge Andolsun, PhD. ****
>
> ** **
>
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