where, PT, PR and PD are the input power of the thermosyphon
mode, the refrigeration mode and the dual mode, respectively, kW.
Pthree is the input power of the fan of the three-fluid heat exchanger,
kW; Pcon and Peva are the input power of the condenser fan and the
evaporator fan, respectively, kW; Pcom is the input power of the
compressor, kW. Combined with the cooling capacity, the EER of
different modes can be calculated.