COPECH | coefficient of performance for electrical driven chiller | ( ) |
COPGCH | coefficient of performance for gas driven chiller | ( ) |
COPHCP | coefficient of performance for hybrid chiller plant | ( ) |
Ec | electrical energy cost | (EGP) |
Gc | natural gas cost | (EGP) |
Ic | Initial cost per chiller | (EGP) |
NECH | number of electrical driven chillers | (chiller) |
NGCH | number of gas driven chillers | (chiller) |
Pcomp | centrifugal compressor power | (kW) |
Ppump | solute pump power | (kW) |
Qcc | cooling capacity | (TR) |
t | time | (hr) |
T | temperature | (˚C) |
Tc | total running cost, (Ec + Gc + Wc) | (EGP) |
| natural gas volume flow rate | (m3/hr) |
Wc | water cost | (EGP) |