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The Building Performance Team
James V. Dirkes II, P.E., BEMP , LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of jvd2pe
Sent: Thursday, December 01, 2011 4:48 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] DX Cooling Coil Sizing in EnergyPlus with high outdoor air
Dear E+ Forum, I have lately wrestled with autosizing feature in EnergyPlus, especially for DX coils with, say, more than 20% outdoor air
(OA). The extended story goes something like this:
• I want to "autosize" primarily for LEED / ASHRAE 90.1 simulations of a Baseline system.
• Often, I manually size the minimum outdoor air amount to match the Proposed system's outdoor air flow.
• This has unpredictable results. When the OA amount is low, say less than 15% of the total air flow, everything works smoothly. • When the OA flow is higher:
o E+ calculates the correct
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