Fluid cooling system

1. An apparatus for cooling one or more heat generating components, the apparatus comprising:

an enclosure defining a volume containing: a first liquid coolant, and the one or more heat generating components immersed in the first liquid coolant;

a heat exchanger unit comprising a conduit surrounded by the volume, the conduit enabling a second liquid coolant to enter and leave the enclosure, the conduit providing a fluid-tight seal between the first liquid coolant and the second liquid coolant when the first liquid coolant within the volume surrounds the conduit; and

a pump within the enclosure configured to direct the first liquid coolant horizontally:

over a plurality of hot areas that form from the one or more heat generating components, such that heat is exchanged from the one or more heat generating components to the first liquid coolant, and

via a pipe or duct disposed entirely within the enclosure to or from the heat exchanger unit such that the heat is exchanged between the first liquid coolant and the second liquid coolant.

2. The apparatus according to claim 1 , wherein the heat exchanger unit further comprises a channel arranged proximal to the conduit, the channel having an inlet for receiving the first liquid coolant into the channel and an outlet for expelling the first liquid coolant from the channel after exchanging the heat with the second liquid coolant.

3. The apparatus of claim 2 , wherein the conduit is located within the channel.

4. The apparatus of claim 2 , wherein the channel has a box profile.

5. The apparatus according to claim 2 , wherein the pump is in fluid communication with the inlet to the channel or the outlet of the channel.

6. The apparatus according to claim 1 , wherein the pump is configured to direct the first liquid coolant parallel to the flow of the second liquid coolant within the conduit.

7. The apparatus according to claim 1 , wherein the conduit is u-shaped.

8. The apparatus according to claim 1 , wherein the enclosure further comprises an inlet and an outlet for the second liquid coolant.

9. The apparatus of claim 8 , wherein the inlet and the outlet for the second liquid coolant are adjacent to each other.

10. The apparatus of claim 8 , wherein the inlet and the outlet for the second liquid coolant are located adjacent to the pump.

11. The apparatus of claim 8 , wherein the inlet and the outlet for the second liquid coolant are located adjacent to the conduit.

12. The apparatus according to claim 1 , further comprising one or more heat sinks in heat communication with the one or more heat generating components.

13. The apparatus of claim 12 , wherein the one or more heat sinks have fins arranged parallel to a flow of the first liquid coolant.

14. The apparatus according to claim 1 , wherein the enclosure is further arranged to house one or more power supplies within the volume.

15. The apparatus according to claim 1 , further comprising a second pump.

16. The apparatus of claim 15 , wherein the pump is a first pump, the first pump and the second pump are arranged on opposing sides of the conduit.

17. The apparatus of claim 1 , wherein the pump directs the first liquid coolant via the pipe or duct from the heat exchanger unit; the apparatus further comprising an additional pipe configured to direct the first liquid coolant to the heat exchanger unit.

18. The apparatus of claim 17 , wherein the heat exchanger unit further comprises a housing surrounding the conduit, the housing having an inlet for first liquid coolant to flow through the heat exchanger unit.

19. The apparatus of claim 17 , wherein the heat exchanger unit is positioned at an edge of the volume within the enclosure.

20. The apparatus according to claim 1 , wherein the first liquid coolant is a one phase coolant.

21. The apparatus according to claim 20 , wherein the apparatus is configured to maintain the first liquid coolant in only a liquid phase.

22. The apparatus according to claim 1 , wherein the second liquid coolant is water or water-based.

23. The apparatus according to claim 1 , wherein the volume of the enclosure is defined by a container housing the first liquid coolant and the one or more heat generating components, the enclosure being arranged so as to prevent the first liquid coolant from leaving the container once the enclosure is sealed.

24. The apparatus according to claim 1 , wherein the heat exchanger unit is disposed between at least two electrical components within the enclosure, each of the at least two electrical components being a power supply, one of the one or more heat generating components, or both.