Patent ID: 11867426
Assignee: INERTECH IP LLC
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 3:
4. A cooling method comprising:
sensing a dry bulb temperature and a wet bulb temperature of ambient air;
operating a fluid cooler and a chiller according to one of the following modes based on the dry bulb temperature and wet bulb temperature of the ambient air:
a free cooling dry operational mode in which a fluid circuit of the fluid cooler is cooled by ambient air, if the wet bulb temperature is less than a predetermined wet bulb temperature;
a free cooling wet operational mode in which the fluid circuit of the fluid cooler is cooled by ambient air that has been cooled by wet media, if the wet bulb temperature is less than a predetermined wet bulb temperature and the dry bulb temperature is greater than a predetermined dry bulb temperature;
a partial free cooling dry operational mode in which the fluid circuit is cooled by ambient air and by a refrigerant circuit, if a fluid circuit temperature is greater than a fluid circuit temperature setpoint;
a partial free cooling wet operational mode in which the fluid circuit is cooled by a refrigerant circuit and by ambient air that has been cooled by wet media, if a fluid circuit temperature is greater than a fluid circuit temperature setpoint and the dry bulb temperature is greater than the predetermined dry bulb temperature;
a mechanical cooling dry operational mode in which the fluid circuit is cooled by the refrigerant circuit, if the dry bulb temperature is greater than a fluid circuit temperature; and
a mechanical cooling wet operational mode in which the fluid circuit is cooled by the refrigerant circuit and a heat exchanger of the refrigerant circuit is in thermal communication with ambient air that has been cooled by wet media, if the dry bulb temperature is greater than the fluid circuit temperature and the dry bulb temperature is greater than the predetermined dry bulb temperature.