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Model exhaust fan tied to economizer operation in CBECC-Com

asked 2015-06-05 08:11:48 -0500

updated 2015-07-11 17:00:07 -0500

Is it possible to model an exhaust fan that only activates during economizer mode? My hunch is that I will have to model this through the Exceptional Design Compliance process.

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I'm trying to model the exhaust fan attached to a relief air segment with a variable speed drive as a workaround.

anchapin's avatar anchapin  ( 2015-06-05 09:23:23 -0500 )edit

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answered 2015-06-05 17:06:02 -0500

No, there is currently no way to only operate the exhaust fan only when the economizer is active. The work-around you propose, i.e. modeling a fan on the relief air segment, is the best solution. The relief fan will operate at the minimum outdoor air flow when the economizer is not active. However, if the fan is variable speed, the amount of energy used at this low part-loads will be small.

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Asked: 2015-06-05 08:11:48 -0500

Seen: 194 times

Last updated: Jun 05 '15