Modular Cooling System

Abstract: A modular cooling system is provided, the cooling system comprising a plurality of chiller modules 12 and a coolant circuit 32 with flow paths having parts in each of the plurality of chiller modules 12. The chiller modules 12 each include: a refrigeration circuit 14 and a free cooling circuit 16, wherein each refrigeration circuit 14 comprises a compressor 18, a heat rejecting heat exchanger 20, an expansion device 22 and a heat absorbing heat exchanger 24, and wherein each free cooling circuit 16 comprises a pump 26, a heat rejecting heat exchanger 28 and a heat absorbing heat exchanger 30. The coolant circuit 32 is used for cooling a working fluid to meet a cooling demand, and the working fluid can be cooled in heat exchange with the heat absorbing heat exchangers 30 of the free cooling circuits 16 and heat exchange with the heat absorbing heat exchangers 24 of the refrigeration circuits 14. The flow paths of the coolant circuit 32 are arranged to connect the heat absorbing heat exchangers 30 of the free cooling circuits 16 in parallel and to connect the heat absorbing heat exchangers 24 of the refrigeration circuits 14 in series, such that the coolant circuit flow paths split along parallel flows 35 through the heat absorbing heat exchangers 30 of the free cooling circuits 16 before recombining to flow sequentially in a combined flow path 37 through the heat absorbing heat exchangers 24 of the refrigeration circuits 14.

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