Water Cooled VRF in DOE 2.3

3 posts / 0 new
Last post

Hi Folks,

Has anyone had success using VRF in DOE 2.3? I've got a project coming up that is very likely going to use a water cooled VRF system tied to a campus CW loop. Any advice would be appreciated!


Matt Garlick, CxA, CEM, BEMP
Building Efficiency Engineer | TBCx

E-mail: msg at tbcxinc.com
Mobile: 801-907-5654
Direct: 801-401-8456

324 S. State Street, Suite 400
Salt Lake City, UT 84111

MGarlick's picture
Joined: 2015-03-11
Reputation: 0

Hi Matt,
My suggestion is to give the new VRF capability a try, and to sign up for the free training being offered by Doug Maddox. He provided the information below in an email 11/16/2018.

I will be presenting a short series of free one hour webinars on new features in the recently released eQuest/DOE-2.3 programs:

Thursday, November 29, 4 PM Eastern Time: HVAC Design Sizing
Thursday, December 6, 4 PM Eastern Time: Dedicated Outside Air Systems and Series Chillers/Boilers
Thursday, December 13, 4 PM Eastern Time: Variable Refrigerant Flow Systems

I have been working with J. J. Hirsch & Associates for the past several years to develop and test these new features, and I am excited to share them with the community!

The webinars will have limited capacity, so please Email me at doug at maddoxenergy.com, if you are interested, and I will send the webinar login information to you.

I plan to share the presentations online afterwards, for those who are unable to attend.

Doug Maddox, PE, CEM
Maddox Energy Consulting

Bill Bishop's picture
Joined: 2012-02-25
Reputation: 7

See also some of the threads I've posted over the last couple weeks (other names include Bill & Doug). I've been pretty open-book about my thoughts and questions as I've started tinkering with the new tools in front of us.

Bill along the way provided a pretty important patch/fix to be mindful of before the next public release, which I expect will likely incorporate that missing piece of the interface.

All that said, I'm not certain whether the new capabilities are in their present state well-suited for a water-cooled VRF system... that would be a good question to send to Doug in advance of his webinars to (hopefully) address... I haven't been involved myself in a real-world case of water cooled VRF myself*, but if the actual system isn't accomplishing intra-zonal heat sharing I speculate that you might be better off using water source heat pump systems, and perhaps modifying the WSHP/GSHP library curves to approximate VRF turn down performance?

* A diagram sketching out the layout of the hydronic loops, condensers, interior units, and refrigerant lines might be a helpful setup for posing the query to both Doug and the rest of us.

[cid:image001.png at 01D480CC.2EF8FBA0]
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

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

[cid:image002.png at 01D480CC.2EF8FBA0]

Nicholas.Caton at schneider-electric.com's picture
Joined: 2016-02-26
Reputation: 0