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
Marty,
You are probably referring to Appendix G of ASHRAE 90.1-2004. It is about water-cooled chillers: it is implicit in the System-Specific Baseline HVAC System Requirements.
This has been corrected in the 2007 version, which now states explicitly "water-cooled".
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Demba NDIAYE
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