[Bldg-sim] EER to EIR Conversion for LEED Baseline

Kevin Kyte kkyte at robsonwoese.com
Thu Nov 6 13:28:27 PST 2008


And the baseline EIR should include the wattage calc'd from G.3.1.2.9?

Backing up for a moment, there is a funny way to determine the oversizing capacities, especially for PSZs.  Here goes:

Run the design model with design capacity, run the design model autosized, find the ratio.
Run the baseline model autosized, apply the ratio.  Now oversize for 15% cooling and 25% for heating.

Does anybody do this differently, because the fine print doesn't exactly say that much.



From: Aulbach, John [mailto:jaulbach at nexant.com]
Sent: Thursday, November 06, 2008 4:05 PM
To: Kevin Kyte; bldg-sim at lists.onebuilding.org
Subject: RE: [Bldg-sim] EER to EIR Conversion for LEED Baseline

Kevin:

I believe it is 15% oversize for cooling and 25% for heating (Page 176 - Appendix G - ASHRAE-90.1-2004 - I don't have 2007 yet). This is aside from fan calculations.

This would apply to either package units or central plant equipment, whichever is specified as baseline.

John R. Aulbach, PE, CEM
Project Manager
Nexant, Inc.
701 West Kimberly Ave., Suite 245
Placentia, CA 92870-6342 USA
Phone: 714-524-4402
Fax: 714-524-4407
email: jaulbach at nexant.com<mailto:jaulbach at nexant.com>


________________________________
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Kevin Kyte
Sent: Thursday, November 06, 2008 12:54 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] EER to EIR Conversion for LEED Baseline
All,

When you Calc your EIRs for baseline, do you use design capacities or oversized baseline capacities?

Thank you.

Kevin

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