[Bldg-sim] Water or air-cooled chillers in baseline models?

[W. Peter Anderson]

Greetings-
Does not APPG3.1.3.11 Address this?  It states the heat of rejection for the chillers must be a cooling tower.  It further describes the condenser water requirements.

Anybody else see anything?

Hope this helps. 

Regards,
W. Peter Anderson, P.E
JP Engineering
41 Mechanic Street
Windsor, CT 06095
Ph: 860/688-5223
Fax: 860/688-5269
  ----- Original Message ----- 
  From: Jessica XP 
  To: bldg-sim 
  Sent: Thursday, March 20, 2008 11:33 AM
  Subject: [Bldg-sim] Water or air-cooled chillers in baseline models?


  Dear folks,


  APP G3.1.3.7 specifies centrifugal chillers in baseline models where conditioned area is greater than 22,296 m2. I always take them as water-cooled chillers by default.

  Today one of my clients challenged why air-cooled centrifugal chillers can't be modeled in the baseline. His argument is that there is not any "water-cooled" explicitly specified in G3.1.3.7, but there are air-cooled centrifugal chillers available in the market.

  I was attemping to convince him of my understanding by searching ASHRAE 90.1 and the associated user manual. But I failed to find any evidence. I doubted if I was wrong.

  Is there anyone in this forum who can give me an answer? And if I am still right, how can I convince my client who is hungry for points of EA cr1?

  Tons of thanks in advance.

  Jessi


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