mode, the fan of the three-fluid heat exchanger stops and the
compressor starts to cool the thermosyphon working fluid. In mild
weather itworks in dual mode, all the fans and the compressorwork
to utilize both natural cold source and mechanical refrigeration cold
source. The compressor, which can be controlled by a frequency
inverter, helps cool the data center since the cooling capacity of the
thermosyphon loop is not sufficient.