[Equest-users] Does anyone know if eQuest can model this system??

Mon Jul 8 17:35:59 PDT 2019

See also:

  *   There’s a new chiller type “strainer cycle” which is what it sounds like:  Tower water circulated through the building’s airside coils!
  *   Review the updated reference entries on waterside economizer – we now have a lot of new flexibility to explicitly model a lot of real-world situations!!!

In my practice with calibrating real-world 2-pipe systems, I have often found it worthwhile to devote extra attentions to interviewing the occupants and facility managers to really lock in on expected/advised thermal comfort behavior.  It isn’t uncommon for example to find, such systems in climates with pleasant-enough swing seasons deliberately push off both heating and cooling loops – you may find some extra flexibility here by leveraging the option to define annual cooling/heating availability schedules at your airside system coils, in conjunction with your loop operation inputs.  On the other hand – occupant behavior during these periods likely will result in some unmet hours if you do nothing else, but be mindful they may not really be uncomfortable and this could represent a miss in your modeled accuracy.  Depending on whether the facility was designed thoughtfully with operable windows and cross-venting paths (that haven’t been screwed/boarded shut for noise), you may find that comfort is generally maintained at very low energy draws… whereas in other cases the swing seasons may entail dropping plant energies only to blow up the elec meter with new space heaters/circ fans.

~Nick

[cid:image005.png at 01D515A3.47EDD880]
Nick Caton, P.E., BEMP
  Senior Energy Engineer
  Regional Energy Engineering Manager
  Energy and Sustainability Services
  Energy Performance Contracting
D
M
F
E
913 . 564 . 6361
785 . 410 . 3317
913 . 564 . 6380
nicholas.caton at se.com<mailto:nicholas.caton at se.com>
15200 Santa Fe Trail Drive
Suite 204
Lenexa, KS 66219
United States
[cid:image006.png at 01D515A3.47EDD880]

From: Equest-users <equest-users-bounces at lists.onebuilding.org> On Behalf Of Bishop, Bill via Equest-users
Sent: Monday, July 8, 2019 2:52 PM
To: John Aulbach <jra_sac at yahoo.com>; equest-users at onebuilding.org
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Does anyone know if eQuest can model this system??

[External email: Use caution with links and attachments]

________________________________

Hi John,
There is a chiller with TYPE=WATER-ECONOMIZER but it looks like there has to be another actual chiller attached to the loop for it to work. You could model a very small mechanical chiller along with a water-economizer chiller, with both chillers attached to a condensing loop served by a cooling tower. You will probably get a high number of unmet cooling hours unless the FCUs never see much of a cooling load.

~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<https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pathfinder-ea.com%2F&data=02%7C01%7CNicholas.Caton%40se.com%7C33eaec52bf584de2b1fa08d703ddfd32%7C6e51e1adc54b4b39b5980ffe9ae68fef%7C0%7C0%7C636982124278738545&sdata=T4VtzOJkVE7uJpWY%2BoJspQ1yyVfUHqNDS%2BfoydUXvT4%3D&reserved=0>
134 South Fitzhugh Street
Rochester, NY 14608               [cid:image008.png at 01D535C4.5C7B1510]         Ask me why Carbon Fee & Dividend may be right for you.

From: Equest-users <equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org>> On Behalf Of John Aulbach via Equest-users
Sent: Sunday, July 7, 2019 10:06 PM
To: equest-users at onebuilding.org<mailto:equest-users at onebuilding.org>
Subject: [Equest-users] Does anyone know if eQuest can model this system??

2-Pipe fan coils. Heating source is hot water from boiler. Cooling source is condenser water fro cooling tower. All converted from a water source heat pump.

Thanks,

John R. Aulbach, PE

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
______________________________________________________________________
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190709/987a7e63/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 255 bytes
Desc: image002.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190709/987a7e63/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image005.png
Type: image/png
Size: 8477 bytes
Desc: image005.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190709/987a7e63/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image006.jpg
Type: image/jpeg
Size: 9336 bytes
Desc: image006.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190709/987a7e63/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image007.jpg
Type: image/jpeg
Size: 1879 bytes
Desc: image007.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190709/987a7e63/attachment-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image008.png
Type: image/png
Size: 1554 bytes
Desc: image008.png
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20190709/987a7e63/attachment-0002.png>