Optimized evaporative dry cooling arrangement and process for a datacenter

A datacenter dry cooling system for cooling a heat-generating electronic processing source, the datacenter associated with a dry cooler unit that incorporates an air-to-liquid heat exchanger panel, an evaporating pad, and an evaporating cooling water distribution arrangement for applying cooling water to the evaporating pad, the system comprising:

• at an air outlet surface of the evaporating pad, at least one temperature sensor configured to detect temperature levels and/or at least one relative humidity sensor configured to detect humidity levels;
• at an air inlet surface of the evaporating pad, at least one temperature sensor configured to detect temperature levels by and/or a relative humidity sensor configured to detect humidity levels by a relative humidity sensor;
• at least one sensor configured to detect a leak from the evaporating pad;
• and
• a controller communicatively-coupled to the temperature and humidity levels sensors disposed at the air outlet and air inlet surfaces of the evaporating pad, the leak sensor, and the evaporating cooling water distribution arrangement, the controller comprising at least one processor configured to:
• receive the detected temperature and humidity levels from the sensors disposed at the air outlet and air inlet surfaces of the evaporating pad and the leak sensor;
• determine whether a first detected temperature level (Tmid) from the air outlet surface is greater than a predetermined first threshold temperature value (Tmidtarget) (st. 310) and, upon determining that the detected first temperature level is greater than the first threshold temperature value, adjusting a predetermined target volume flow rate (Vtarget) of the evaporating cooling water distribution arrangement to a predetermined maximum flow rate (Vmax);
• determine whether a second detected temperature level from the air outlet surface (Tlow) is greater than a second threshold temperature value (Tlowupmax) and, upon determining that the detected temperature level is greater than the second threshold temperature value, adjusting the predetermined the target volume flow rate (Vtarget) of the evaporating cooling water distribution arrangement to the predetermined maximum flow rate (Vmax);
• and
• determine whether the second detected temperature level (Tlow) is less than a third threshold temperature value (Tlowdownmin) and, upon determining that the second detected temperature level is less than the third threshold temperature value, adjusting the predetermined the target volume flow rate (Vtarget) of the evaporating cooling water distribution arrangement to a predetermined minimum flow rate (Vmin).

A non-transitory computer-readable medium comprising computer-executable instructions that, when executed by at least one processor, causes the at least one processor to execute a datacenter dry cooling method for cooling a heat-generating electronic processing source, the method comprising:

• receiving detected temperature and humidity levels from sensors disposed at air outlet and air inlet surfaces of an evaporating pad of a dry cooler unit that incorporates an air-to-liquid heat exchanger panel, the evaporating pad, and an evaporating cooling water distribution arrangement for applying cooling water to the evaporating pad;
• determining whether a first detected temperature level from the air outlet surface is greater than a predetermined first threshold temperature value and, upon determining that the detected first detected temperature level is greater than the first threshold temperature value, adjusting a predetermined target volume flow rate of the evaporating cooling water distribution arrangement to a predetermined maximum flow rate;
• determining whether a second detected temperature level from the air outlet surface is greater than a second threshold temperature value and, upon determining that the second detected temperature level is greater than the second threshold temperature value, adjusting the predetermined the target volume flow rate of the evaporating cooling water distribution arrangement to the predetermined maximum flow rate;
• and
• determining whether the second detected temperature level is less than a third threshold temperature value and, upon determining that the second detected temperature level is less than the third threshold temperature value, adjusting the predetermined the target volume flow rate of the evaporating cooling water distribution arrangement to a predetermined minimum flow rate.