Systems and methods for cooling a fluid circuit for cooling a rack of servers

1. A rack of servers, the rack comprising:

a fluid conduit configured to flow a coolant therethrough, the fluid conduit being positioned with the rack and including portions in which the coolant flows distinctly as a heated coolant, a warm coolant, and a target coolant;

a plurality of heat-generating components in thermal communication with the fluid conduit, the plurality of heat-generating components being included in the servers and causing the heated coolant;

a heat-exchanging module fluidly coupled with the fluid conduit to receive the heated coolant from the plurality of heat-generating components, the heat-exchanging module being positioned within the rack and configured to cool the heated coolant into the warm coolant, the warm coolant having a cooler temperature than the heated coolant; and

a cooling module mounted within the rack and including as a separate cooling distribution unit

a heat-exchanger fluidly coupled with the heat-exchanging module, the heat-exchanged receiving the warm coolant from the heat-exchanging module,

a chiller fluidly coupled with the heat-exchanger to receive the warm coolant, the chiller being configured to cool the warm coolant into a target coolant, the target coolant having a lower temperature than the warm coolant, and

a pump configured to receive and deliver the target coolant back in thermal communication with the plurality of heat-generating components.

2. The rack of claim 1 , wherein the cooling module further comprises:

an inlet pipe for delivering the target coolant from the chiller to the heat-exchanger; and

an outlet pipe for removing the warm coolant from the heat-exchanger to the chiller.

3. The rack of claim 2 , wherein the target coolant is water delivered at a temperature of less than about 10 degrees Celsius.

4. The rack of claim 2 , wherein the pump is fluidly coupled to the inlet pipe for driving the target coolant from the chiller to the heat-exchanger.

5. The rack fluid circuit of claim 1 , wherein the pump is configured to drive the target coolant from the heat-exchanger to each server in the rack of servers.

6. The rack of claim 1 , wherein the heat-exchanging module is a rear-door heat exchanger disposed on the rack of servers and coupled to a plurality of fans.

7. The rack of claim 1 , wherein the heat-exchanging module is a radiator coupled to a plurality of fans.

8. The rack of claim 1 , further comprising a temperature sensor coupled to an outlet channel of the fluid conduit and configured to measure temperature of the coolant flowing in the fluid conduit.

9. A method of cooling a fluid circuit configured to cool a rack of servers, the method comprising:

providing a fluid conduit configured to flow a coolant therethrough, the fluid conduit having portions in which the coolant flows distinctly as a heated coolant, a warm coolant, and a target coolant;

receiving the heated coolant into a heat-exchanging module, the heat-exchanging module cooling the heated coolant into the warm coolant;

receiving the warm coolant from the heat-exchanging module into a heat-exchanger, the heat-exchanger being positioned in a separate cooling distribution unit;

measuring temperature of the warm coolant;

in response to determining that the temperature of the warm coolant is greater than a temperature of a chiller, operating the chiller to change the warm coolant into the target coolant;

outputting the target coolant from the chiller back to the heat-exchanger; and

delivering the target coolant, via a pump, from the heat-exchanger to the heat-generating components.

10. The method of claim 9 , wherein the temperature of the warm coolant is measured using a temperature sensor coupled to an outlet channel of the conduit.

11. The method of claim 9 , wherein the target coolant is water delivered at a temperature of less than about 10 degrees Celsius.