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A system includes a cooling water intake conduit having a water intake in a submerged area of an open natural body of water, a first water-to-water heat exchanger having a first side in fluid communication with the cooling water intake conduit, and a closed water loop in fluid communication with a s

A system includes a cooling water intake conduit having a water intake in a submerged area of an open natural body of water, a first water-to-water heat exchanger having a first side in fluid communication with the cooling water intake conduit, and a closed water loop in fluid communication with a second side of the water-to-water heat exchanger and arranged to route water to cooling structures at a computer data center.

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1. A system, comprising: a cooling water intake conduit having a water intake positioned in a submerged area between a top surface of an open natural body of water and a terranean surface beneath the body of water;a first water-to-water heat exchanger having a first side in fluid communication with

1. A system, comprising: a cooling water intake conduit having a water intake positioned in a submerged area between a top surface of an open natural body of water and a terranean surface beneath the body of water;a first water-to-water heat exchanger having a first side in fluid communication with the cooling water intake conduit;a closed water loop in fluid communication with a second side of the water-to-water heat exchanger and arranged to route water to a cooling structure at a computer data center, the cooling structure fluidly coupled to the first water-to-water heat exchanger and adapted to cool a flow of water, without mechanical refrigeration, from the closed water loop to the cooling structure; anda water output port fluidly coupled to the cooling structure and positioned to release water received in the cooling water intake conduit and passed through the water-to-water heat exchanger and the cooling structure to the open natural body of water. 2. The system of claim 1, wherein the cooling water intake conduit descends into the open natural body of water from a platform that is floating on the top surface of the open natural body of water. 3. The system of claim 1, further comprising one or more generators powered by natural movement of a fluid in an open environment and connected so as to power computers in the computer datacenter. 4. The system of claim 3, further comprising one or more rectifiers for producing direct current supply power from power supplied by the one or more electrical generators. 5. The system of claim 4, wherein the one or more rectifiers provide power directly to computers in the data center without further DC-to-AC conversion of the power. 6. The system of claim 1, further comprising one or more pumps to move water from the cooling water intake conduit and through the water-to-water heat exchanger. 7. The system of claim 6, wherein one or more pumps are located in the open natural body of water. 8. The system of claim 1, further comprising one or more cooling towers in fluid communication with the first water-to-water heat exchanger, and arranged to cool water from the cooling water intake conduit that has been heated in the water-to-water heat exchanger. 9. The system of claim 8, further comprising a second water-to-water-heat exchanger in fluid communication with an output of the one or more cooling towers on a first side, and having a second side in fluid communication with a water loop that is arranged to route water to the cooling structure at the computer data center. 10. The system of claim 1, further comprising a supplemental chiller cooling system to provide additional cooling when cooling water from the cooling water intake is insufficient to cool the data center. 11. A method of maintaining a computer data center, comprising: drawing in cooling water from a sub-surface area between a top surface of an open natural body of water and a terranean surface beneath the body of water;circulating the cooling water through a first side of a first liquid-to-liquid heat exchanger;circulating water from a computer data center through a second side of the liquid-to-liquid heat exchanger and to one or more cooling units at the computer data center;circulating water from the one or more cooling units at the data center to a cooling structure fluidly coupled to the first water-to-water heat exchanger to cool the water, without mechanical refrigeration, from the one or more cooling units; andcirculating the cooled water from the cooling structure to a water output port fluidly coupled to the cooling structure to release the cooled water to the open natural body of water. 12. The method of claim 11, wherein the cooling water intake conduit descends into the open natural body of water from a platform that is floating on the top surface of the open natural body of water. 13. The method of claim 11, further comprising generating power for computers in the computer data center from natural movement of a fluid in an open environment. 14. The method of claim 13, wherein the natural movement of the fluid comprises movement of waves in the ocean. 15. The method of claim 11, further comprising rectifying power from the one or more electrical generators and supplying the rectified power to the computer data center. 16. The method of claim 15, providing the rectified power directly to computers in the data center without further DC-to-AC conversion of the power. 17. The method of claim 11, further comprising circulating the cooling water through one or more cooling towers in fluid communication with the first water-to-water heat exchanger, to cool the water. 18. The method of claim 17, further comprising routing the cooling water through a second water-to-water-heat exchanger in fluid communication with an output of the one or more cooling towers on a first side, and circulating water through a second side of the second water-to-water heat exchanger and through cooling units at the data center. 19. A system, comprising: a cooling water intake conduit having a water intake positioned in a submerged area between a top surface of an open natural body of water and a terranean surface beneath the body of water;a first water-to-water heat exchanger having a first side in fluid communication with the cooling water intake conduit;a closed water loop in fluid communication with a second side of the first water-to-water heat exchanger and arranged to route water to cooling structures at a computer data center;a cooling tower that receives water from the first water-to-water heat exchanger and is arranged to provide water cooled by the cooling tower; anda second water-to-water-heat exchanger comprising a first side in fluid communication with the cooling tower to receive the water cooled by the cooling tower, and a second side in fluid communication with the closed water loop arranged to route water to cooling structures at the computer data center. 20. The system of claim 19, further comprising one or more valves operably arranged to route water from the second side of the first water-to-water heat exchanger to the second side of the second water-to-water heat exchanger. 21. The system of claim 19, wherein the first side of the second water-to-water heat exchanger comprises an outlet in fluid communication with the open natural body of water. 22. The system of claim 19, further comprising an automated control system communicably coupled to the one or more valves and operable to: monitor an outside air temperature and a temperature of the open natural body of water; andbased on the outside air temperature and the temperature of the open natural body of water being substantially equal, adjust the one or more valves to fluidly couple the second side of the first water-to-water heat exchanger to the second side of the second water-to-water heat exchanger.