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NC-2009 EAp2:Minimum Energy Performance

100% outdoor air indirect evaporative cooling system

Hi everybody, The project is a garment factory. We are modeling a 100% outdoor air IEC system for the proposed case. And the system 8 (VAV with PFP Boxes) is modeled in the baseline case. The IEC system provides a lot of outdoor air for the spaces. So can we model this supply outdoor air as the outdoor air of the baseline system? Beacause the outdoor air is too much, it causes a lot of energy consumption in the baseline system. This seems to be unreasonable. Thanks

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Omar Elrawy
Green Building Consultant | Researcher
GreenA Consultants
LEEDuser Basic Member
38 thumbs up

Mon, 12/28/2015 - 10:13

The answer will depend on whether you have Exhaust Air Energy Recovery or not, and whether you have demand-control ventilation or not. Please refer to ASHRAE 90.1 Sections 6.4.3.8, 6.5.6.1, G3.1.2.5, and G3.1.2.10.

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