Rack cooling system

A method, comprising:

• receiving one or more condition signals relating to thermal conditions in different groups of one or more electronic devices mounted in a rack, wherein each respective group of the different groups of one or more electronic devices is associated with a respective position in the rack;
• and
• generating a plurality of control signals for controlling a plurality of shared fans arranged in an array and coupled to the rack, wherein the plurality of shared fans comprises different groups of one or more shared fans each associated with a respective location in the array, wherein each respective group of the different groups of one or more shared fans are configured to provide cooling to more than one respective group of the different groups of one or more electronic devices, wherein the plurality of control signals are generated based on:
• respective thermal conditions in respective different groups of one or more electronic devices of the different groups of the one or more electronic devices;
• respective positions in the rack associated with the respective different groups of one or more electronics devices;
• and
• a fan speed control model generated based on performance relationships due to interactions between the plurality of shared fans arranged in the array;
• and
• wherein the plurality of control signals cause at least one of the different groups of one or more shared fans to induce a different amount or direction of airflow than another one of the different groups of one or more shared fans, wherein the at least one of the different groups of one or more shared fans and the other one of the different groups of one or more shared fans both induce at least some airflow
• wherein the fan speed control model is updated in response to determining one or more deviations between current performances of two or more of the groups of shared fans in different respective locations in the array when operating according to a combination of the control signals in comparison to performance values included in the fan speed control model for the two or more groups of shared fans in the different respective locations in the array.

A non-transitory computer-readable storage medium storing program instructions that, when executed on one or more computing devices, cause the one or more computing devices to:

• receive one or more condition signals relating to thermal conditions in different groups of one or more electronic devices mounted in a rack, wherein each respective group of the different groups of one or more electronic devices is associated with a respective position in the rack;
• and
• generate a plurality of control signals for controlling a plurality of shared fans arranged in an arrangement and coupled to the rack, wherein the plurality of shared fans comprises different groups of one or more shared fans each associated with a respective location in the arrangement, wherein each respective group of the different groups of one or more shared fans is configured to provide cooling to more than one respective group of the different groups of one or more electronic devices, wherein the plurality of control signals are generated based, at least in part, on:
• respective thermal conditions in respective different groups of one or more electronic devices of the different groups of one or more electronic devices;
• respective positions in the rack associated with the respective different groups of one or more electronics devices;
• and
• a fan speed control model generated based on performance relationships due to interactions between the plurality of shared fans;
• and
• wherein the plurality of control signals are generated to operate at least one of the different groups of one or more shared fans to induce a different amount or direction of airflow than another one of the different groups of one or more shared fans, wherein the at least one of the different groups of one or more shared fans and the other one of the different groups of one or more shared fans both induce at least some airflow
• wherein the fan speed control model is updated in response to determining one or more deviations between current performances of two or more of the groups of shared fans in different respective locations in the array when operating according to a combination of the control signals in comparison to performance values included in the fan speed control model for the two or more groups of shared fans in the different respective locations in the array.