The chiller performance data files were created from published catalog data from manufacturer's web sites. In some cases the data files represent a single manufacturer/size and in other cases they represent an average across a range of manufacturers and sizes - it depends on the data file that you have chosen. A "rating condition" is chosen and then all other data points are then normalized to the capacity and power at the rating condition. That's why the capacity and power consumption supplied to the proforma model should correspond to the condition in the data file where the normalized ratios are 1. Besides the simple set supplied with the TESS Library install, we have dozens of other data files if you're looking for something in particular.
Jeff
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Jeff Thornton
President - TESS LLC
22 N. Carroll Street, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com
On 07/31/2012 6:17 pm, Santiago Naranjo Palacio wrote:
Dear TRNSYS-users,
I have been using both of the chiller models supplied by TESS (Type 655 and 666) and I have a couple of questions regarding the data files needed to use them. How were exactly these numbers obtained (the Capacity Ratio and COP ratio)? I am trying to use the chillers for different chilled water temperature settings and ambient temperatures and I was wondering how to do this. If I understand the model correctly, this means that these chillers only approximate power consumption based on the data provided and there is no other criteria. Correct?
I would greatly appreciate any input.
Thanks
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Santiago Naranjo Palacio, Ph.D. Candidate
Cornell University, New York