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A cooling door assembly includes a frame and a cooling door coupled to the frame. The cooling door includes multiple heat exchangers. The frame is configured to mount to the back of a server rack or other electronics enclosure in such a manner that the cooling door opens to allow access to the elect

A cooling door assembly includes a frame and a cooling door coupled to the frame. The cooling door includes multiple heat exchangers. The frame is configured to mount to the back of a server rack or other electronics enclosure in such a manner that the cooling door opens to allow access to the electronics servers within the server rack while maintaining a fluidic connection to an external cooling system. The frame is coupled to the external cooling system and the cooling door includes one or more swivel joints, each configured to provide one or more fluid paths between the cooling door and the frame. The cooling door assembly includes separate and independent fluid paths, where fluid is separately provided to each independent fluid path. Different groups of heat exchangers are coupled to each independent fluid path. In the event of failure of one of the independent fluid paths, the other independent fluid path(s) remain operational.

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1. A cooling door assembly comprising: a. a plurality of external supply line interconnects configured to receive a fluid;b. a plurality of external return line interconnects configured to output the fluid;c. an electronics enclosure;d. a cooling door including a plurality of heat exchangers configu

1. A cooling door assembly comprising: a. a plurality of external supply line interconnects configured to receive a fluid;b. a plurality of external return line interconnects configured to output the fluid;c. an electronics enclosure;d. a cooling door including a plurality of heat exchangers configured to pass the fluid therethrough, wherein the cooling door is coupled to the electronics enclosure; ande. one or more swivel joints coupled to the electronics enclosure and to the cooling door, wherein each of the one or more swivel joints includes one or more independent fluid paths, each fluid path coupled either between one or more of the plurality of the external supply line interconnects and one or more of the plurality of heat exchangers, or between one or more of the plurality of heat exchangers and one or more of the plurality of the external return line interconnects, thereby forming a plurality of independent fluid paths through the cooling door. 2. The cooling door assembly of claim 1 wherein one or more of the one or more swivel joints comprise an inlet swivel joint that includes one or more inlet fluid paths, each inlet fluid path coupled between one or more of the plurality of external supply line interconnects and one or more of the plurality of heat exchangers. 3. The cooling door assembly of claim 1 wherein one or more of the one or more swivel joints comprise an outlet swivel joint that includes one or more outlet fluid paths, each outlet fluid path coupled between one or more of the plurality of heat exchangers and one or more of the plurality of external return line interconnects. 4. The cooling door assembly of claim 1 wherein one or more of the one or more swivel joints includes a plurality of fluid paths, further wherein one or more of the plurality of fluid paths include an inlet fluid path, each inlet fluid path coupled between one of the plurality of external supply line interconnects and one or more of the plurality of heat exchangers, and one or more of the plurality of fluid paths include an outlet fluid path, each outlet fluid path coupled between one or more of the plurality of heat exchangers and one or more of the plurality of external return line interconnects. 5. The cooling door assembly of claim 1 wherein each independent fluid path comprises one or more of the plurality of external supply line interconnects, one or more fluid paths through one or more swivel joints, one or more of the plurality of heat exchangers, and one or more of the plurality of external return line interconnects. 6. The cooling door assembly of claim 1 wherein the one or more swivel joints are each configured to rotate while maintaining the one or more independent fluid paths between the plurality of external supply line interconnects, the plurality of heat exchangers, and the plurality of external return line interconnects, thereby enabling the cooling door to rotate relative to the electronics enclosure while maintaining each independent fluid path through the cooling door. 7. The cooling door assembly of claim 1 wherein the one or more of the plurality of heat exchangers in a first independent fluid loop are independent of the one or more of the plurality of heat exchangers in a second independent fluid loop. 8. The cooling door assembly of claim 7 wherein a first number of the plurality of heat exchangers in the first independent fluid loop is the same as a second number of the plurality of heat exchangers in the second independent fluid loop. 9. The cooling door assembly of claim 7 wherein a first number of the plurality of heat exchangers in the first independent fluid loop is different than a second number of the plurality of heat exchangers in the second independent fluid loop. 10. The cooling door assembly of claim 1 wherein a first number of the plurality of external supply line interconnects in a first independent fluid loop is the same as a second number of the plurality of external supply line interconnects in a second independent fluid loop. 11. The cooling door assembly of claim 1 wherein a first number of the plurality of external supply line interconnects in a first a independent fluid loop is different than a second number of the plurality of external supply line interconnects in a second independent fluid loop. 12. The cooling door assembly of claim 1 wherein a first number of the plurality of external return line interconnects in a first independent fluid loop is the same as a second number of the plurality of external return line interconnects in a second independent fluid loop. 13. The cooling door assembly of claim 1 wherein a first number of the plurality of external return line interconnects in a first independent fluid loop is different than a second number of the plurality of external return line interconnects in a second independent fluid loop. 14. The cooling door assembly of claim 1 wherein the fluid is a refrigerant. 15. The cooling door assembly of claim 1 wherein the fluid comprises water. 16. The cooling door assembly of claim 1 further comprising a plurality of fluid supply lines coupled between the plurality of external supply line interconnects and the one or more swivel joints. 17. The cooling door assembly of claim 1 further comprising a plurality of fluid return lines coupled between the one or more swivel joints and the plurality of external return line interconnects. 18. The cooling door assembly of claim 1 wherein the cooling door further comprises a plurality of cooling door supply lines coupled between the one or more swivel joints and the plurality of heat exchangers, and a plurality of cooling door return lines coupled between the plurality of heat exchangers and the one or more swivel joints. 19. The cooling door assembly of claim 18 wherein the cooling door further comprises a plurality of heat exchanger supply lines, one heat exchanger supply line for each heat exchanger and each heat exchanger supply line is coupled between one of the plurality of cooling door supply lines and the heat exchanger. 20. The cooling door assembly of claim 19 further comprising a flow control regulator coupled to each heat exchanger supply line. 21. The cooling door assembly of claim 1 further comprising a flow control regulator coupled to at least one of a fluid supply line coupled between one or more of the plurality of external supply line interconnects and the one or more swivel joints, and a cooling door supply line coupled between the one or more swivel joints and one or more of the plurality of heat exchangers. 22. The cooling door assembly of claim 1 further comprises one or more mounting blocks, each one of the one or more mounting blocks is coupled to the electronics enclosure and to one of the one or more swivel joints. 23. A cooling door assembly comprising: a. a frame including a plurality of external supply line interconnects configured to receive a fluid, and a plurality of external return line interconnects configured to output the fluid;b. a cooling door including a plurality of heat exchangers configured to pass the fluid therethrough; andc. one or more swivel joints coupled to the frame and to the cooling door, wherein each of the one or more swivel joints includes one or more independent fluid paths, each fluid path coupled either between one or more of the plurality of the external supply line interconnects and one or more of the plurality of heat exchangers, or between one or more of the plurality of heat exchangers and one or more of the plurality of the external return line interconnects, thereby forming a plurality of independent fluid paths through the frame and the cooling door. 24. The cooling door assembly of claim 23 wherein one or more of the one or more swivel joints comprise an inlet swivel joint that includes one or more inlet fluid paths, each inlet fluid path coupled between one or more of the plurality of external supply line interconnects and one or more of the plurality of heat exchangers. 25. The cooling door assembly of claim 23 wherein one or more of the one or more swivel joints comprise an outlet swivel joint that includes one or more outlet fluid paths, each outlet fluid path coupled between one or more of the plurality of heat exchangers and one or more of the plurality of external return line interconnects. 26. The cooling door assembly of claim 23 wherein one or more of the one or more swivel joints includes a plurality of fluid paths, further wherein one or more of the plurality of fluid paths include an inlet fluid path, each inlet fluid path coupled between one of the plurality of external supply line interconnects and one or more of the plurality of heat exchangers, and one or more of the plurality of fluid paths include an outlet fluid path, each outlet fluid path coupled between one or more of the plurality of heat exchangers and one or more of the plurality of external return line interconnects. 27. The cooling door assembly of claim 23 wherein each independent fluid path comprises one or more of the plurality of external supply line interconnects, one or more fluid paths through one or more swivel joints, one or more of the plurality of heat exchangers, and one or more of the plurality of external return line interconnects. 28. The cooling door assembly of claim 23 wherein the one or more swivel joints are each configured to rotate while maintaining the one or more independent fluid paths between the plurality of external supply line interconnects, the plurality of heat exchangers, and the plurality of external return line interconnects, thereby enabling the cooling door to rotate relative to the frame while maintaining each independent fluid path through the frame and the cooling door. 29. The cooling door assembly of claim 23 wherein the one or more of the plurality of heat exchangers in a first independent fluid loop are independent of the one or more of the plurality of heat exchangers in a second independent fluid loop. 30. The cooling door assembly of claim 29 wherein a first number of the plurality of heat exchangers in the first independent fluid loop is the same as a second number of the plurality of heat exchangers in the second independent fluid loop. 31. The cooling door assembly of claim 29 wherein a first number of the plurality of heat exchangers in the first independent fluid loop is different than a second number of the plurality of heat exchangers in the second independent fluid loop. 32. The cooling door assembly of claim 23 wherein a first number of the plurality of external supply line interconnects in a first independent fluid loop is the same as a second number of the plurality of external supply line interconnects in a second independent fluid loop. 33. The cooling door assembly of claim 23 wherein a first number of the plurality of external supply line interconnects in a first independent fluid loop is different than a second number of the plurality of external supply line interconnects in a second independent fluid loop. 34. The cooling door assembly of claim 23 wherein a first number of the plurality of external return line interconnects in a first independent fluid loop is the same as a second number of the plurality of external return line interconnects in a second independent fluid loop. 35. The cooling door assembly of claim 23 wherein a first number of the plurality of external return line interconnects in a first a independent fluid loop is different than a second number of the plurality of external return line interconnects in a second independent fluid loop. 36. The cooling door assembly of claim 23 wherein the door frame is configured to be coupled to an electronics enclosure. 37. The cooling door assembly of claim 23 wherein the fluid is a refrigerant. 38. The cooling door assembly of claim 23 wherein the fluid comprises water. 39. The cooling door assembly of claim 23 wherein the frame further comprises a plurality of frame supply lines coupled between the plurality of external supply line interconnects and the one or more swivel joints. 40. The cooling door assembly of claim 23 wherein the frame further comprises a plurality of frame return lines coupled between the one or more swivel joints and the plurality of external return line interconnects. 41. The cooling door assembly of claim 23 wherein the cooling door further comprises a plurality of cooling door supply lines coupled between the one or more swivel joints and the plurality of heat exchangers, and a plurality of cooling door return lines coupled between the plurality of heat exchangers and the one or more swivel joints. 42. The cooling door assembly of claim 41 wherein the cooling door further comprises a plurality of heat exchanger supply lines, one heat exchanger supply line for each heat exchanger and each heat exchanger supply line is coupled between one of the plurality of cooling door supply lines and the heat exchanger. 43. The cooling door assembly of claim 42 further comprising a flow control regulator coupled to each heat exchanger supply line. 44. The cooling door assembly of claim 23 further comprising a flow control regulator coupled to at least one of a frame supply line coupled between one or more of the plurality of external supply line interconnects and the one or more swivel joints, and a cooling door supply line coupled between the one or more swivel joints and one or more of the plurality of heat exchangers. 45. The cooling door assembly of claim 23 wherein the frame further comprises one or more mounting blocks, each one of the one or more mounting blocks is coupled to one of the one or more swivel joints.