[Bldg-sim] Chiller Performance Curve

[沈洁]

Dear all； 
 
Could you share with me about how to creat the chiller performance curve?
I received the part load performance data for the constant flow centrifugal chiller from client as in the following table: 











　
Capacity
Evaporator
Condensor
condensor-
Primary POwer
Efficiency
　
　

　
Leaving Temp
Entering Temp
Leaving Temp
Entering Temp
evaporator
　
　
　
　

% Load
USRT
Fahrenheit
Fahrenheit
Fahrenheit
Fahrenheit
dT
kW
Efficiency
COP
EIR

100
600
39.2
48.2
95
86
46.80 
376
0.627 
5.612 
0.178 

75
450
39.2
45.95
82.112
75.506
36.31 
246.6
0.548 
6.418 
0.156 

50
300
39.2
43.7
69.386
64.994
25.79 
158
0.527 
6.677 
0.150 

25
150
39.2
41.45
67.298
64.994
25.79 
101.8
0.679 
5.182 
0.193 
 
I searched on the internet and gained that there are three performance curves for chiller, EIR_FPLR, EIR_FT and CAP _FT
EIR_FPLR= a1+ b1 X PLR + c1 X PLR^2 
CAP_FT=a2 + b2 X t evap +c2 X t evap ^2 + d2 X tcond + e2 X tcond^2 + f2 X t evap X tcond 
EIR_FT =  a3 + b3 X t evap +c3 X t evap ^2 + d3 X tcond + e3 X tcond^2 + f3 X t evap X tcond
 
So I created these three performance curve using Bi-Quadratic curve type with Leaving Evaporator, Entering Condensor Temp , capacity , load and EIR as needed in the aboved equation.
 
I'm not sure whether it is correct, could you give me some suggestions?
 
Any help will be appreiciated !
 
Eleanor Shen 
  		 	   		  
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