[EnergyPlus_Support] Reformulated Electric EIR chiller

["&#28504;&#27589;&#32676;" <yiqunpan@xxxxxxxxx>]

On the Engineering Reference, it is said that the reformulated EIR 
chiller model can improve the accuracy of simulating a VSD chiller 
significantly from normal EIR chiller model. However I got some 
ubnormal results from the reformulated model. I selected a model from 
the chiller datasets of E+ - ReformEIRChiller Trane CVHF 
2317kw/6.33COP/VSD, and tried to obtain the changing trend of COP 
following its part load ratio and found that its COP decreases with the 
part load ratio decreases, with the same leaving chilled water 
temperature and entering cooling water temperature. I also tried with a 
normal EIR chiller model from the datasets, but got different changing 
trend, which COP reaches its peak when the part load ratio is aroung 
50%. It seems that the result from normal EIR chiller model is more 
close to the actural condition. 

Has anybody tried the same thing and is able to tell me something about 
it? thanks. 

Yiqun Pan
Tongji University  


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