[BLDG-SIM] ASHRAE 90.1 ECB System 6

[Galen Staengl]

I am looking for help interpreting ASHRAE 90.1-1999.  I am modeling a
building with a ground source heat pump, and it looks like the ECB system
should be System 6.  System 6 is listed as a water source heat pump, but the
cooling type is listed as Direct Expansion.  I'm not sure whether to model
this as a water source heat pump with an air cooled chiller (doesn't make a
lot of sense), or an air cooled heat pump with a water source heat pump for
heating (also doesn't make a lot of sense), or a water source heat pump with
a air cooled fluid cooler to cool the water (might make sense but certainly
is not a "direct expansion" system.  I appreciate any advice on the subject.

Thanks,


 Galen Staengl, P.E.
  
  129 Goodman St.
  Charlottesville, VA  22902
  (434)295-8105 (phone)
  (434)295-8105 (fax)
  www.staenglengineering.com



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