[EnergyPlus_Support] Unrealistic ChillerEIRFPLR curves for data in the file: Chillers.idf?

["d_h51@xxxxxxxxx" <d_h51@xxxxxxxxx>]

Hi all,

When I plot the COP vs PLR dependence taken from the file 'Chillers.idf' for specific chillers (please see the file   

COP vs PLR (EnergyPlus).jpg ) it shows that for some chillers at e.g. PLR=0.4 the COP is 4times higher than for PLR=1, and for PLR =0.5 most of the chillers have 2times higher COP than at PLR=1. 

For me it's unrealistic, especially when i compare these results to the catalogue data given from the producers (where the COP/COP_ref  value reaches its maximum usually for PLR=0.5 and is about 1.6)

Do I do a mistake somewhere? COP/COP_ref = 1/ChillerEIRFPLR, right?

Or maybe this problem is related to my next question:
COP vs PLR performance in catalogue data is mostly rated under ARI conditions, for instance for water2water chillers and PLR=1 ECWT=29.4C and for PLR=0.5 ECWT=18.3C. Do the ChillerEIRPLR curves are rated for constant ECWT? If yes how can I modify PLR curves rated according to ARI standard into curves for constant ECWT?

Thanks for any help in advance,
Damian

__._,_.___

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___