[Bldg-sim] Appendix G - Fan power

Rosenberg, Michael I michael.rosenberg at pnl.gov
Tue Mar 8 09:38:18 PST 2011


A word of caution if you are using this 2007 tab of this spreadsheet. The pressure credit is being calculated for the entire supply fan cfm. It should only be calculated for the design airflow through the device. While these two airflows can be the same, often they are not.

Mike

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Michael Rosenberg, CEM, LEED AP
Senior Research Scientist
ENERGY & ENVIRONMENT DIRECTORATE

Pacific Northwest National Laboratory
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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jorge Torres-Coto
Sent: Tuesday, March 08, 2011 8:29 AM
To: 'Sami, Vikram'; 'bldg-sim at lists.onebuilding.org'
Subject: Re: [Bldg-sim] Appendix G - Fan power

Yes that is correct, the dot means multiplication.

The Excel calculator will come in very handy (credit to 7 Group)

Jorge E. Torres Coto   [cid:image001.jpg at 01CBDD74.8C8AC2C0]
4830 Viewridge Ave.
San Diego, CA 92123
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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Sami, Vikram
Sent: Tuesday, March 08, 2011 8:11 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Appendix G - Fan power

Does the dot in the equation indicate multiplication? So should the equation read CFMS X 0.0013 + A?

The reason I am confused is that they use X in other places.
[cid:image003.jpg at 01CBDD74.8C8AC2C0]

Thanks in advance
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