[Bldg-sim] Diversity factors

Jim Dirkes jim at buildingperformanceteam.com
Tue Aug 12 03:25:30 PDT 2014


1.       Outdoor air minimum (code) amounts generally do not affect unmet load hours very much, so I don’t think you need to be concerned.

2.       The HVAC system may reduce outdoor air amounts if it employs “demand controlled ventilation”, e.g., CO2 sensors.

James V Dirkes II, PE, BEMP, LEED AP
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653

From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Rathna Shree
Sent: Tuesday, August 12, 2014 5:51 AM
To: bldg
Subject: [Bldg-sim] Diversity factors

Dear All,

In most of the core and shell projects, the HVAC consultant would have considered diversity factor on the overall cooling tonnage. While modelling, we will be able to comfortably take diversity on occupancy, equipment and lighting loads. But diversity on fresh air cannot be taken. Because of which the project may end up with plant unmet hours. Please let me know how to tackle the issue.

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