[Equest-users] Estimating groundwater temps

[Bishop, Bill]

Hey there Nick,
Weather files such as TMY2 and TMY3 include monthly ground temperature data. I don't know how the data is generated but I believe it's based on methodology in ASHRAE Handbook - Fundamentals.
According to the help documentation, the DHW-INLET-T and DHW-INLET-T-SCH default to the monthly ground temperatures from the weather file. You can create a custom hourly report block to report the ground temperature -ground temp is one of the global variables. You can also use DOE2 weather utilities to convert weather files to readable text files. For example, STAT.BAT generates a summary of statistical data that includes the monthly ground temperatures.

Happy Thursday,
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP
Senior Energy Engineer

[Pathfinder-EA-logo-2]T: (585) 698-1956                        F: (585) 325-6005
bbishop at pathfinder-ea.com<mailto:wbishop at pathfinder-ea.com>        www.pathfinder-ea.com<http://www.pathfinder-ea.com/>
134 South Fitzhugh Street
Rochester, NY 14608               [cid:image007.png at 01D4CF78.FEC0F270]         Ask me why Carbon Fee & Dividend may be right for you.

From: Equest-users <equest-users-bounces at lists.onebuilding.org> On Behalf Of Nicholas Caton via Equest-users
Sent: Thursday, February 28, 2019 2:51 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Estimating groundwater temps

Hi everyone,

I have a situation where I want to estimate the seasonal variance in the potable domestic water supply as a function of atmospheric drybulb temperatures.  I *think* eQuest has some algorithm to derive 12 (monthly average) temperatures from the weather file data for makeup/DHW purposes... however after scanning the 2.1e engineers manual and a first pass at trying to find some helpful entry in the resource manual, I'm coming up dry so far.

I'm trying hoping to source the equations & assumptions used for this estimation, so that I can modify it to fit my project.  I'm not specifically married to matching eQuest's output - any similar process/formulae would be welcome.

Any suggestions?

~Nick


[cid:image008.png at 01D4CF78.FEC0F270]
Nick Caton, P.E., BEMP
  Senior Energy Engineer
  Regional Energy Engineering Manager
  Energy and Sustainability Services
  Schneider Electric

D  913.564.6361
M  785.410.3317
F  913.564.6380
E  nicholas.caton at schneider-electric.com<mailto:nicholas.caton at schneider-electric.com>

15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States

[cid:image009.png at 01D4CF78.FEC0F270]



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190228/0a4d70c8/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.jpg
Type: image/jpeg
Size: 9336 bytes
Desc: image003.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190228/0a4d70c8/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image007.png
Type: image/png
Size: 1554 bytes
Desc: image007.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190228/0a4d70c8/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image008.png
Type: image/png
Size: 255 bytes
Desc: image008.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190228/0a4d70c8/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image009.png
Type: image/png
Size: 8477 bytes
Desc: image009.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190228/0a4d70c8/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 1903 bytes
Desc: image001.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190228/0a4d70c8/attachment-0001.jpg>