[Bldg-sim] Ashrae 90.1 - Unmet hours

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Scott,

Wanted to express thanks I'm certain many of us in the community share
for you, Steve Gates and the rest of the DOE-2 team. I know I'm not the
only one looking forward very much to this new feature!

NICK CATON, E.I.T.

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Can't you just get the hours unmet from the SS-R report (Zone Under
Heated Hours, Zone Under Cooled Hours)? That's what I've always used
and haven't had a problem yet anyway.

Jason Wendel

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That is what I have done in the past as well, but I don't think this method accounts for simultaneous "zones" being unmet. In some cases you may be counting the same hour for multiple zones which based on the discussion so far should only count for a single hour. I am not aware of any simple method currently to get a true list of non-simultaneous unmet load hours for the building as a hole from equest.

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That is what I have done in the past as well, but I don't think this method accounts for simultaneous "zones" being unmet. In some cases you may be counting the same hour for multiple zones which based on the discussion so far should only count for a single hour. I am not aware of any simple method currently to get a true list of non-simultaneous unmet load hours for the building as a hole from equest.

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Jason,

If you take the numbers from the SS-R report, you do not know if unmet
hours in one zone occur at the same hour as unmet hours in another zone
(as in Ashu's & Fred's example yesterday). Someone else said that the
SS-R report only shows unmet hours when the fan is running. Finally,
for a building with many zones, you'd have to look at a lot of reports,
compared to just the BEPS/BEPU.

I'd love to see a summary like what Scott says they're working on. That
would be great!

James D. Waechter, PE, LEED AP

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