Patent ID: 9107327
Filing Date: 2015-08-11
Classification: G06F,H05K

Abstract:
1. A method for controlling a data center, the method comprising: removing heat from a data center using liquid coolant cooled without vapor compression refrigeration on a liquid cooled information technology equipment rack; Regulating data center temperature within three distinct zones of control with a controller-apparatus that includes a computer processor, wherein the three distinct zones comprise a first, second and third zone; regulating the liquid coolants flow to the data center through a range of liquid coolant flow values with the controller-apparatus based upon information technology equipment temperature thresholds of the data center; and regulating the data center energy usage by using the controller-apparatus according to at least one of a user selected upper target temperature and a user selected lower target temperature; measuring a temperature at the data center; measuring a dew point at the data center to obtain the dew point temperature; forming the first zone by opening a recirculation valve when the measured temperature at the data center decreases below a minimum target temperature threshold and maintain the data center above the dew point temperature, the recirculation value configured to bypass an outdoor heat exchanger when opened; forming the second zone by closing the recirculation valve when the measured temperature at the data center increases above the minimum target temperature threshold; operating the data center at a minimum cooling power state when the measured temperature at the data center is between the minimum target temperature threshold and a maximum target temperature threshold; and forming the third zone by increasing a flow rate of the liquid coolant when the measured temperature at the data center increases above the maximum target temperature threshold.