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Zone Mean Air Temperature is not following building Set Point Temperature

asked 2021-02-26 02:53:47 -0600

flag of United States of America

330 ●3 ●8 https://scholar.google...

updated 2021-03-04 22:16:39 -0600

Hi,

I'm wondering if anyone could assist me with the following modeling issue. Actually, I'm modeling a single-room office building in a summer day- while MAT is not following the cooling setpoint temperature for the beginning hours of the day (having zero cooling loads for those hours- regardless of the setpoint temperature for those hours of the day).

While it seems to be an occupancy schedule, I already changed the schedule of the Fan(on/off) as well as my cooling HVAC (Coil:Cooling:DX:SingleSpeed) to Always_On (which is basically a fractional schedule of 1 for all 24 hours of the day).

Here is the link to the idf file that I'm referring to: https://drive.google.com/file/d/1qDIo...

Any ideas would be greatly appreciated! Sincerely, Mohammad

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Please don't directly mention people in your questions. Add the appropriate tags (this is not the case right now) and it will be correctly seen. I suggest tagging it with your software to begin with (energyplus for eg)

Julien Marrec ( 2021-03-02 04:22:36 -0600 )edit

1

Thanks for keeping me posted. Edited now!

Mohammad ( 2021-03-02 04:54:54 -0600 )edit

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answered 2021-03-05 10:39:36 -0600

Ag

1410 ●5 ●8 http://it.linkedin.com...

Yuo do not have enough cooling capacity to jump from 29.44 °C to 17 °C in only 6 h Reduce your SummerDesignDay setpoint temperature and you'll see. Anyway you have to stay over the min. htg setpoint, therefore eventually change that value too.

It is not a regulation issue, but a capacity issue

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@Ag Thank you so much for your hint. It helped me to resolve my issue. Many thanks!

Mohammad ( 2021-03-06 10:58:20 -0600 )edit

Great. Tank you to have marked the answer as solved

Ag ( 2021-03-06 12:39:08 -0600 )edit

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Asked: 2021-02-26 02:53:47 -0600

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Last updated: Mar 05 '21

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