[BLDG-SIM] PLF curves for inverter units

[Mike Tillou]

You should  visit the EPRI website (www.epri.com) and request news brief 47 which is titled "Evaluation of Losses in ASD/Motor Systems".  This newsbrief does a good job describing how system efficiency is affected by the use of a VFD. 
 
Mike
 
 

Michael Tillou, PE
etc Group, Inc.
PO Box 7, Williamstown, MA 01267
ph. (413) 458-9870  

  

-----Original Message-----
From: postman at gard.com [mailto:postman at gard.com] On Behalf Of Fernando Domínguez Muñoz
Sent: Friday, September 24, 2004 7:10 AM
To: BLDG-SIM at GARD.COM
Subject: [BLDG-SIM] PLF curves for inverter units


Dear users,
I'm simulating a residential VAV system with TRNSYS. The air conditioner is the inverter unit RZP100DV1 of Daikin, whose minimum partial load (load/max capacity) is 31%, so the unit only cycles when PLR<0.31. How can I predict the degradation of system efficiency under these circumstances? What DOE-2 function should I use? Does somebody knows PLF functions for inverter units?
 
Thank you in advance.
 
F. Domínguez Muñoz
University of Málaga (Spain)



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