[Bldg-sim] Fossil/Electric hybrid system under 90.1 App G

[Paul Riemer]

I believe the/a CIR that Mr. Rosenberg is referring to is an NC v 2.2 CIR submitted 9/27/06 and answered on 10/23/06 that hinges on the gas being preheat.

I have not read the CIR Mr. Dec mentioned although that seems fascinating too.

Paul Riemer






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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Rosenberg, Michael I
Sent: Monday, November 03, 2008 10:43 AM
To: James Hansen; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Fossil/Electric hybrid system under 90.1 App G

Yes, you are correct. Appendix G requires that if you have any gas heat in your Proposed building, the baseline system would use gas heat. However, if this is for a LEED submittal, you may want to do a little research on relevant CIR's since USGBC has interpreted this a little differently than was intended by Appendix G.

_________________________

Michael Rosenberg
Senior Commercial Buildings Energy Analyst
ENERGY & ENVIRONMENT DIRECTORATE

Pacific Northwest National Laboratory
2032 Todd Street
Eugene, OR 97405
(541) 844-1960
michael.rosenberg at pnl.gov
www.pnl.gov



________________________________
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of James Hansen
Sent: Monday, November 03, 2008 8:32 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Fossil/Electric hybrid system under 90.1 App G

I can't seem to find reference to this in the 90.1 User Manual.

In Appendix G, Table G3.1.1A, there is a reference to a Fossil/Electric hybrid for determining Baseline system type.  Is this a system that, for example, might have a gas-fired RTU with electric VAV boxes?

In other words, if there is ANY gas heat in your Proposed building, your Baseline building would have to automatically default to a fuel furnace or gas-fired hot water heating system, correct?

Thanks,

GHT Limited
James Hansen, PE, LEED AP
Senior Associate
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