Patent ID: 9091496
Filing Date: 2015-07-28
Classification: F28F,H05K

Abstract:
1. A data center cooling system, comprising: a data center having electronic equipment that is supported in a plurality of racks; a cooling fluid source; a plurality of cooling units in the data center, each cooling unit configured to cool air warmed by a sub-set of the electronic equipment in the data center; a plurality of control valves, including a particular control valve associated with a particular cooling unit of the plurality of cooling units; and a controller arranged to modulate the particular control valve associated with a particular cooling unit, to open or close the control valve to substantially maintain an approach temperature set point of the particular cooling unit, wherein the approach temperature is defined by a difference between a temperature of an airflow circulated from the cooling unit and a temperature of the cooling fluid source circulated to the particular cooling unit, and wherein the controller is arranged to receive a signal adjusting the approach temperature set point, wherein the controller is one of a plurality of controllers, each of the plurality of controllers associated with one of the plurality of cooling units, where the controller is arranged to modulate the particular control valve based on receipt of a signal adjusting the approach temperature set point based, at least in part, on the particular control valve being at a percentage open position that varies from a threshold percentage open setpoint.