[Bldg-sim] Appendix G Chiller

Rosenberg, Michael I michael.rosenberg at pnl.gov
Thu May 27 09:06:47 PDT 2010

Section G3.1.3.11 Heat Rejection (Systems 7 and 8) tells you that "the heat rejection device shall be an axial fan cooling tower with two speed fans." It does not matter what type of chiller you have in the proposed design, if your system type requires a chiller, it is water-cooled.

Michael Rosenberg
Senior Commercial Buildings Energy Analyst
Pacific Northwest National Laboratory
2032 Todd Street
Eugene, OR 97405
(541) 844-1960
michael.rosenberg at pnl.gov
From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Snarski, Marty
Sent: Thursday, May 27, 2010 7:31 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Appendix G Chiller

Hello, All.

After perusing Appendix G and the LEED book, I've been unable to find the answer to this one:

If I've got a project that's using a Air-cooled Chiller, what baseline chiller do I use?  Appendix G says to use 2 equally sized Screw Chillers.  But, it doesn't say if these have to be air-cooled or water cooled.  I'd imagine there's quite a benefit to compare with a water cooled, when you take into account the cooling tower, etc.

Any ideas if this is alright?

Martin Snarski   LEED(r) AP
Mechanical Engineer

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