Cooling system comprising a refrigeration circuit circulating a refrigerant and comprising in the flow direction of the refrigerant: a plurality of compressors (2a, 2b, 2c, 2d); at least one condenser; at least one expansion device (8, 10); and at least one evaporator for providing a cooling capacity; the cooling system further comprising: a subcooling circuit for subcooling the refrigerant circulating in the refrigeration circuit, the subcooling circuit being configured to circulate a subcooling refrigerant and comprising at least one subcooler compressor (22, 23); at least one heat exchange means (6, 7) being arranged downstream of the at least one condenser and being configured for heat exchange between the refrigeration circuit and the subcooling circuit; and a control unit which is configured for controlling the compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and at least one subcooler compressor (22, 23) of the subcooling circuit such that the cooling capacity to be provided by the at least one evaporator is met; characterized in that the cooling system comprises at least one temperature sensor which is configured to measure the temperature of the subcooling refrigerant entering the heat exchange means (6, 7), in that the control unit is configured for controlling the plurality of compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and at least one subcooler compressor (22, 23) of the subcooling circuit so that the temperature of the subcooling refrigerant entering the heat exchange means is in the range of 1 °C to 10 °C, in particular in a range of 3 °C to 5 °C; and in that the control unit is configured to run the minimum number of compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and to run at least one subcooler compressor (22, 23) of the subcooling circuit so that the cooling capacity to be provided by the at least one evaporator is met and so that the overall power consumption is minimized. a plurality of compressors (2a, 2b, 2c, 2d); at least one condenser; at least one expansion device (8, 10); and at least one evaporator for providing a cooling capacity; the cooling system further comprising: a subcooling circuit for subcooling the refrigerant circulating in the refrigeration circuit, the subcooling circuit being configured to circulate a subcooling refrigerant and comprising at least one subcooler compressor (22, 23); at least one heat exchange means (6, 7) being arranged downstream of the at least one condenser and being configured for heat exchange between the refrigeration circuit and the subcooling circuit; and a control unit which is configured for controlling the compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and at least one subcooler compressor (22, 23) of the subcooling circuit such that the cooling capacity to be provided by the at least one evaporator is met; characterized in that the cooling system comprises at least one temperature sensor which is configured to measure the temperature of the subcooling refrigerant entering the heat exchange means (6, 7), in that the control unit is configured for controlling the plurality of compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and at least one subcooler compressor (22, 23) of the subcooling circuit so that the temperature of the subcooling refrigerant entering the heat exchange means is in the range of 1 °C to 10 °C, in particular in a range of 3 °C to 5 °C; and in that the control unit is configured to run the minimum number of compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and to run at least one subcooler compressor (22, 23) of the subcooling circuit so that the cooling capacity to be provided by the at least one evaporator is met and so that the overall power consumption is minimized. a subcooling circuit for subcooling the refrigerant circulating in the refrigeration circuit, the subcooling circuit being configured to circulate a subcooling refrigerant and comprising at least one subcooler compressor (22, 23); at least one heat exchange means (6, 7) being arranged downstream of the at least one condenser and being configured for heat exchange between the refrigeration circuit and the subcooling circuit; and a control unit which is configured for controlling the compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and at least one subcooler compressor (22, 23) of the subcooling circuit such that the cooling capacity to be provided by the at least one evaporator is met; characterized in that the cooling system comprises at least one temperature sensor which is configured to measure the temperature of the subcooling refrigerant entering the heat exchange means (6, 7), in that the control unit is configured for controlling the plurality of compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and at least one subcooler compressor (22, 23) of the subcooling circuit so that the temperature of the subcooling refrigerant entering the heat exchange means is in the range of 1 °C to 10 °C, in particular in a range of 3 °C to 5 °C; and in that the control unit is configured to run the minimum number of compressors (2a, 2b, 2c, 2d) of the refrigeration circuit and to run at least one subcooler compressor (22, 23) of the subcooling circuit so that the cooling capacity to be provided by the at least one evaporator is met and so that the overall power consumption is minimized.