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How to model DOAS w/ DCV in Openstudio?

asked 2017-01-17 11:01:53 -0500

Yuki gravatar image

updated 2017-05-08 15:52:32 -0500

I am modeling a building that uses DOAS w/ DCV and active chilled beams. The ACB is constant volume and DOAS is variable volume, so I model ACB using FCUs. Now the question is how can I implement DCV in DOAS? I turn the DCV on in the control and the outdoor air seems correct. But the DOAS supply air is not 100% OA. Where can I set the DOAS to be 100% OA while the OA cfm might vary?

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answered 2017-01-17 18:35:25 -0500

Anoop H gravatar image

In the OS:Controller:OutdoorAir object of the outside air (DOAS) loop, check the 'Minimum Fraction of Outdoor Air Schedule Name' and 'Maximum Fraction of Outdoor Air Schedule Name'. Make sure they are not following any schedule.

Some other miscellaneous DOAS tips

  • At the terminal unit level, set the 'control for outdoor' to 'Yes'
  • The top of your DOAS air loop should have 3 tabs. 'Layout', 'Control' and 'Grid'. Go to the 'Control' tab and make sure all the schedules are correctly assigned
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Asked: 2017-01-17 11:01:53 -0500

Seen: 561 times

Last updated: Jan 19 '17