Decoupled Cooling With Economizer Option OpenStudio

asked 2018-07-30 14:49:30 -0500

sspielman's avatar

updated 2018-08-06 08:11:01 -0500

I would like to test a building option which uses chilled beams, but when the OA temperature is less than 55F it uses air cooling. I have a version of the model which VAV reheat, and a chilled beam version with min OA DOAS. But I am looking for a way to control the VAV serving the chilled beam zones to only air cool when the air-handler is in economizer mode. I can't seem to find a way to do this. Basically I want the VAV to provide minimum flow when OA is above 55F and cooling flow when below 55F. Can anyone suggest something for this?

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have you tried setting zone equipment priority? You could specify chilled beams first, so they take priority in cooling, and then have a controller that shuts off water to chilled beams below 55F. Otherwise you could use EMS for the VAV controller.

mdahlhausen's avatar mdahlhausen  ( 2018-07-30 15:47:15 -0500 )edit