If your question is more about Appendix G, you might get more responses with this list:
http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
since this list is more specifically for EnergyPlus.
I
don't agree with your assessment of ASHRAE 90.1-2007 Appendix G. In
your proposed design, the cold room is a separate thermal block from the
rest of your model and your baseline needs to match your proposed
design with respect to thermal blocks. See Table G3.1, 7. Thermal Blocks
- HVAC Zones Designed.
As far is modeling in EnergyPlus is concerned, a cold room would be better served by refrigeration equipment, not air conditioning equipment -- see the input objects Refrigeration:AirChiller, ZoneHVAC:RefrigerationChillerSet, etc.
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Ayzer Akguc
Sent: Wednesday, October 30, 2013 10:11 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Cold Room
Hi,
I would like to ask a question about cold rooms. I have been modeling a cold room conditioned at 4°C during the year by air conditioners. In the baseline building, all thermal zones at the same floor are conditioned by the same air handling unit according to ASHRAE 90.1 2007, Appendix G. I think it would be wrong that all these zones are conditioned by the same air handling unit throughout the year for this special case. Because other thermal zones have different set-point temperatures (21°C) than cold room. In the baseline building, the air handling unit should blow the air at very low temperature during the year for conditioning the cold room at 4°C. Therefore, it would be a problem for setting the set-point temperatures of other zones.
What should I do in this special case?
Best Regards
Alpay