[Equest-users] Ground temperatures

[Nick Caton]

I haven't tried Joe's suggested tool (yet), but here's the hourly report variable you're looking for:
[cid:image001.png at 01CED0C7.28BC4720]
(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

[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<mailto: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<mailto: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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