Provisioning cooling elements for chillerless data centers

A method for providing multi-level distributed cooling to a data center, comprising:

• shifting workloads between servers to consolidate running servers into a minimum number of racks;
• providing liquid coolant to one or more racks in proportion to a number of operating servers in the data center;
• monitoring a liquid coolant temperature before the coolant has entered into one or more racks;
• decreasing cooling to one or more of the racks if the liquid coolant temperature falls below a first threshold by disengaging one or more liquid-to-liquid heat exchangers;
• increasing cooling to one or more of the racks if the liquid coolant temperature exceeds a second threshold by engaging one or more liquid-to-liquid heat exchangers;
• monitoring an intra-rack liquid coolant temperature before the coolant has entered one or more servers within the rack;
• decreasing cooling to one or more of the servers if the intra-rack liquid coolant temperature falls below a first threshold by decreasing liquid coolant flow to the one or more servers;
• increasing cooling to one or more of the servers if the intra-rack liquid coolant temperature exceeds a second threshold by increasing coolant flow to the one or more servers;
• and
• turning on additional servers if the coolant temperature is below the first coolant threshold and all liquid-to-liquid heat exchangers have been disengaged to prevent condensation.