[BLDG-SIM] eQuest: Mathematical model for chiller type=HEAT PUMP?

[Jeff Haberl]

Hello:

Here's a stab at your question since it seems like nobody has answered this.

DOE-2.1e uses a family of curve fits to "simulate" a chiller, heat pump, boiler, fan, etc. You can read about this in p. IV.14 of the DOE2.1a Reference manual. You will also need to read about Equipment Quadratics on page V.37 of the same manual. These curve fits are default or user defined linear, bi-linear, quadratic, bi-quadratic or cubic curves that are listed in the output page PV-G of the Plant program, when specified. 

To see what your model is using, you'll need to run your building, determine which quadratics you are using for your "heat pump", and then look at the quadratics using the PV-G command for your building, perhaps plot these in a spreadsheet and compare against ARI specs.

Jeff

8=!  8=)  :=)  8=)  ;=)  8=)  8=(  8=)  8=()  8=)  8=|  8=)  :=')  8=)  8=)  8=?

Jeff S. Haberl, Ph.D., P.E.............................jhaberl at esl.tamu.edu

Professor......................................................Office Ph: 979-845-6507

Department of Architecture.......................Lab Ph: 979-845-6065 

Energy Systems Laboratory.......................FAX: 979-862-2457 

Texas A&M University..............................77843-3581

College Station, Texas, USA.......................URL: www-esl.tamu.edu

8=/  8=)  :=)  8=)  ;=)  8=)  8=()  8=)  :=)  8=)  8=!  8=)  8=?  8=)  8=)  8=0 

 


-----Original Message-----
From: postman at gard.com [mailto:postman at gard.com] On Behalf Of Pedro Rodrigo
Sent: Monday, May 23, 2005 6:19 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] eQuest: Mathematical model for chiller type=HEAT PUMP?

> Hi all.
> 
> I´m searching for the eQuest model's mathematical
> ecquations implemented for the chiller type HEAT
> PUMP.
> My plant equipment is an air cooled, two mode unit,
> both cooling and heating, that supply conditioned
> water to a two-pipe loop.
> 
> I can´t find the mathematical model in DOE2.2
> documentation, nor in DOE2.1A engineer manual.
> 
> Could you help me to find this information about the
> model?
> 
> Thanks,
> Regards,
> 


Pedro Manuel Rodrigo Cruz
University of Jaen, Spain


		
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