[Equest-users] Where did the underheated and undercooled hours go in DOE2.3?

[Bishop, Bill]

Chris,
I often get unmet heating and/or cooling hours in Build 7175, though I get the impression that my DOE2.3 models generally have fewer unmet hours than my DOE2.2 models did, probably due to simulation engine improvements but also due to me being older and in some ways, wiser. 😉
If you care to share your model files, perhaps someone will take a look.
Regards,
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer
[Logo, company nameDescription automatically generated]      T: (585) 698-1956                  www.pathfinder-ea.com<http://www.pathfinder-ea.com>
[IconDescription automatically generated][cid:image006.jpg at 01D96301.A3318930]bbishop at pathfinder-ea.com<mailto:bbishop at pathfinder-ea.com>
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From: Equest-users <equest-users-bounces at lists.onebuilding.org> On Behalf Of Chris Hadlock via Equest-users
Sent: Thursday, March 30, 2023 11:07 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Where did the underheated and undercooled hours go in DOE2.3?

I've suddenly realized I'm not getting any underheated (UH) or undercooled (UC) hours listed in my SS-R report for any of my recent projects, all of which were done using build 7175 in DOE 2
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sophospsmartbannerend
I've suddenly realized I'm not getting any underheated (UH) or undercooled (UC) hours listed in my SS-R report for any of my recent projects, all of which were done using build 7175 in DOE 2.3.

Even when I purposefully simulate conditions where underheated/undercooled hours are occurring, they aren't being reported. I've checked hourly temperatures (Tstat setpoints versus zone temperature) so I know there are UH and UC hours. This is occurring with different system types (I've checked PSZ and fan coil) and different thermostat types (two-position and proportional) and my throttling ranges are generally default values. I'm stumped.

I never had this issue with DOE 2.2 (albeit I was always using 7173 in the past). I work with a lot of 2-pipe fan coil systems where UH and UC hours are in abundance.

Has anyone else noticed they are no longer getting underheated and undercooled hours in DOE2.3?

Thanks,

---
Chris Hadlock, M.A.Sc<https://us-east-2.protection.sophos.com?d=a.sc&u=aHR0cDovL00uQS5TYw==&i=NWZjNTI0OTJkYjA1OTYwZGY1NmNjOGVj&t=SEJ3Q0E4bm1nN3hVMHd2WlFvWW1QSTZveUxIMCtocG1oOTRRSEpsb3M0ND0=&h=5bfc4e8bd5804a39914e87b56680850d&s=AVNPUEhUT0NFTkNSWVBUSVaABQu4VeDzY-e9mKaryyriU8q7hezF8Oyn75MLo7t4Tr2MkfRWI7oFjCSs3eWou34>., P.Eng, LEED AP BD+C
Founder & Senior Energy Consultant

HADLOCK CONSULTING
201 Candlewood Cr
Waterloo, ON N2L5T3
(226) 343-5599
www.hadlockconsulting.ca<https://us-east-2.protection.sophos.com?d=hadlockconsulting.ca&u=aHR0cDovL3d3dy5oYWRsb2NrY29uc3VsdGluZy5jYS8=&i=NWZjNTI0OTJkYjA1OTYwZGY1NmNjOGVj&t=TGNKeUp4ZUNMdDFnWWJVTXFOa1JSUXJ1VE1zMWZqWGI0NXZDN2xXR1djbz0=&h=5bfc4e8bd5804a39914e87b56680850d&s=AVNPUEhUT0NFTkNSWVBUSVaABQu4VeDzY-e9mKaryyriU8q7hezF8Oyn75MLo7t4Tr2MkfRWI7oFjCSs3eWou34>
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