Re: [EnergyPlus_Support] Condensing Temperature Control

["Michael J. Witte" <mjwitte@xxxxxxxx>]

I am not sure I understand the question.  The chiller models use curve-fits to 
establish efficiency (COP or EIR) as a function of chlled water and condenser 
temperatures.  The equations are explained in the Input Output Reference and/or 
the Engineering Reference, depending on the particular chiller model.  

If you want to see this effect in EnergyPlus output results, you could set up a 
simulation which is similar to the PlantLoadProfile.idf example file using an 
air-cooled chiller and a fixed plant load.  Then model it with a weather file 
or a series of design days and compare efficiency vs. outdoor dry bulb.

Mike




On 21 Jul 2006 at 16:29, Ashfaque Ahmed Chowdhury wrote:

> Dear All,
> 
> I would like to investigate how the condensing temperature serves to
> accurately determine the energy efficiency or cop of aircooled chillers
> under part load condition. How can I model variable lower condenser
> temperature in EnergyPlus/DesignBuilder? I'm new in the field of building
> energy simulation.Can anyone help me providing some references.
> Cheers:
> Ashfaque
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





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