[BLDG-SIM] DOE2.1E Chiller performance

[Varkie Thomas]

To those who responded to this inquiry:

We tested the two conditions with TRACE-700.  There is little difference in the energy consumed by the chillers for CHW temp range of 38F to 56F and 44F to 56F particularly in the large tonnage range.  This is also indicated in chiller performance data catalogs.  There is a big difference in pumping and piping costs.

Varkie Thomas


-----Original Message-----
From: Fred Porter [mailto:fporter at archenergy.com]
Sent: Wednesday, May 14, 2003 11:08 AM
To: BLDG-SIM at gard.com
Cc: BLDG-SIM at gard.com
Subject: [BLDG-SIM] DOE2.1E Chiller performance


Common problem. You are using a recent version of DOE2 based on an 
implementation by Jeff Hirsch, but using documentation and keywords from 
older versions. All CHW & HW characteristics are now declared in Systems 
Plant Assignment, not Plant Plant Parameters, CW stuff is still in PLANT.

Correct documentation is available from DOE2.com. The v110 bdl 
supplement or something like that.

However, for plant analysis at this level of detail, I would highly 
recommend DOE2.2, instead of DOE2.1.

Varkie Thomas wrote:

>  DOE2.1E shows chiller LWT of 44 F (DOE2 default) no matter what the input.  Here is the input and output for the option with 38 F Chiller LWT.  
>

>
>
>----------------------------------------------------------------
>
>PLANT-PARAMETERS
>
>CHILL-WTR-T = 37                     $ Def = 44. LWT at bottom of Thrott Range $
>CHILL-WTR-THROTT = 2.0         $ Def = 2.5. Thrott Range = 37 to 39.  LWT = 38 $
>
>TWR-SETPT-T = 85                      
>TWR-DESIGN-RANGE = 15.0        $ Def = 10. Tower temp range :85 to 100 $ 
>
>CCIRC-DESIGN-T-DROP = 18       $ Def = 10. Chiller EWT = 56 $
>

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