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. 2021 Aug 13;74:103256. doi: 10.1016/j.scs.2021.103256

Table A1.

Correlation coefficients of the models in section 2.2 for the case study.

Items Control scheme and model coefficients Correlation R2
Chillers COP of centrifugal chiller, in Eq. (8):
α0=4.57;α1=1230.52;α2=4.25×10−2;α4=−154.5
α5=4.80;α6=0.55;α7=−4.70×10−4;α8=−1.58×10−2
α9=1.28×10−5 		0.53
COP of scroll chiller, in Eq. (8):
α0=9.68,α1=228.85,α2=5.17×10−2,α4=21.95
α4=−1.39,α5=0.42,α6=−3.37×10−3,α7=1.82×10−4
α8=4.95×10−5 		0.73
Chilled water pump For centrifugal chiller system, water flow rate is constant, 47.55 L/s. /
For scroll chiller system, water flow rate is constant, 5.77 L/s /
Cooling water pump Water flow rate for centrifugal chiller, in Eq. (12):
γ0=61.88,γ1=−7.14×10−3,γ2=1.21×10−4
γ3=−4.64×10−8.
 0.99
Water flow rate for the primary cooling water pump of scroll chiller, in Eq. (12):
γ0=10.33,γ1=−2.77×10−2,γ2=2.92×10−4
γ3=−5.41×10−7
 0.99
Water flow rate for the secondary cooling water pump of scroll chiller system, Eq. (12):
γ0=14.56,γ1=−0.10,γ2=6.619×10−4,γ3=−1.13×10−6. 		0.94
Cooling towers Power of cooling towers for centrifugal chiller, in Eq. (13):
do=−0.98,d1=7.94×10−2
Condenser inlet water temperature can be calculated by Eq. (9):
β0=16.31,β1=0.42,β2=2.89×10−2,β3=7.53×10−3
β4=−3.86×10−6
 0.98 for Eq. (13)
0.82 for Eq. (9)
Power of cooling towers for scroll chiller, in Eq. (13):
do=−0.62,d1=4.78×10−2
Condenser inlet water temperature, in Eq. (9):
β0=23.79,β1=−0.87,β2=4.75×10−2,β3=6.99×10−2
β4=2.67×10−5 		0.79 for Eq. (13)
0.87 for Eq. (9)
Ratio of exhaust airflow rate to fresh airflow rate 0.66 /