[Equest-users] Estimating groundwater temps

Fri Mar 1 09:33:46 PST 2019

Thank you so much, Julien!

Did you mean to CC the mailing list in reply?  I’d like to share your resources with the community for record if there isn’t a reason to keep this between us (and Bill, of course)!

I also received (off list) under separate cover the literal FORTRAN subroutine (ctrl-F for GTEMP in the attached) that eQuest and its associated weather utility program use to derive monthly temps… I’ll try to wrap this into my share out & conclusion post for the community as well, though TBH in this moment: where I can follow ~90% of this code, that last 10% leaves me scratching my head in trying to correctly interpret the variables…  Maybe some digging into the Burch & Christensen correlation you shared will reveal some insights/parallels in the actual methodology.

~Nick

[cid:image001.png at 01D4D022.9FB212A0]
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:image002.png at 01D4D022.9FB212A0]

From: Julien Marrec <julien.marrec at gmail.com>
Sent: Friday, March 01, 2019 12:56 AM
To: Nicholas Caton <Nicholas.Caton at se.com>
Cc: Bishop, Bill via Equest-users <equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] Estimating groundwater temps

[External email: Use caution with links and attachments]

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Hi Nick,
I wrote an Openstudio measure on the subject in which I included a supporting excel file that will help you calculate that. You can just download the xlsx in the right column here and ignore the rest:
https://bcl.nrel.gov/node/83628<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbcl.nrel.gov%2Fnode%2F83628&data=02%7C01%7Cnicholas.caton%40se.com%7C5242a7ed99914c30e71708d69e12f952%7C6e51e1adc54b4b39b5980ffe9ae68fef%7C0%7C0%7C636870201664169074&sdata=JwuJxhZl%2B4k0a6fB2R%2FN92aN7qaz%2FEcZf3fFnqb5NRI%3D&reserved=0>
E+ engineering documentation for the Burch and Christensen correlation:
https://bigladdersoftware.com/epx/docs/9-0/engineering-reference/water-systems.html#water-mains-temperatures<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbigladdersoftware.com%2Fepx%2Fdocs%2F9-0%2Fengineering-reference%2Fwater-systems.html%23water-mains-temperatures&data=02%7C01%7Cnicholas.caton%40se.com%7C5242a7ed99914c30e71708d69e12f952%7C6e51e1adc54b4b39b5980ffe9ae68fef%7C0%7C0%7C636870201664179082&sdata=YpaLsXJwIDxNrdsRagFAXEzhkbSsdcb2f6fqARdXobU%3D&reserved=0>.
Cheers,
Julien
--
Sent from a mobile device, please excuse the brevity.
Julien Marrec, EBCP, BPI MFBA
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On Feb 28, 2019, at 20:51, Nicholas Caton via Equest-users <equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>> wrote:
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:image001.png at 01D4CF6C.A8C3AA40]
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

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