Chilled water cooling system

1. A chilled water cooling system, comprising:

a natural cooling circuit including a natural cooler, a chilled water main pump, at least one first pipeline, and a terminal heat exchanger connected in series, the terminal heat exchanger being disposed at a location in need of cooling; and

a mechanical cooling circuit including a chilled water main machine, a chilled water auxiliary pump, and at least one second pipeline connected in series,

wherein the mechanical cooling circuit is connected in parallel with the terminal heat exchanger and the natural cooling circuit through a three-way valve disposed between the mechanical cooling circuit and the natural cooling circuit.

2. The chilled water cooling system of claim 1 , wherein the chilled water main machine is a water-cooled chilled water main machine.

3. The chilled water cooling system of claim 2 , wherein the water-cooled chilled water main machine includes a first cooling tower.

4. The chilled water cooling system of claim 3 , wherein the first cooling tower is a closed cooling tower.

5. The chilled water cooling system of claim 3 , wherein the natural cooler includes a second cooling tower.

6. The chilled water cooling system of claim 5 , wherein the second cooling tower is a closed cooling tower.

7. The chilled water cooling system of claim 5 ,

wherein the first cooling tower is incorporated into the natural cooling circuit via third pipelines, a first valve, and a second valve, the first valve and the second valve being disposed on an input side and an output side of the first cooling tower, respectively, and

wherein, in a natural cooling mode, the first cooling tower and the second cooling tower are connected in series by turning on the first valve and the second valve.

8. The chilled water cooling system of claim 7 , wherein the first valve and the second valve are disposed at a junction of the natural cooling circuit and the mechanical cooling circuit.

9. The chilled water cooling system of claim 2 , wherein the water-cooled chilled water main machine includes a first heat exchanger that uses cold water resources as a cooling medium.

10. The chilled water cooling system of claim 9 , wherein the natural cooler includes a second heat exchanger that uses cold water resources as a cooling medium.

11. The chilled water cooling system of claim 10 ,

wherein the first heat exchanger is incorporated into the natural cooling circuit via third pipelines, a third valve, and a fourth valve, the third valve and the fourth valve being disposed at an input side and an output side of the first heat exchanger, respectively, and

wherein, in a natural cooling mode, the first heat exchanger and the second heat exchanger are connected in series by turning on the third valve and the fourth valve.

12. The chilled water cooling system of claim 11 , the third valve and the fourth valve are disposed at a junction of the natural cooling circuit and the mechanical cooling circuit.

13. The chilled water cooling system of claim 1 , wherein the chilled water main machine is an air-cooled chilled water main machine.

14. The chilled water cooling system of claim 13 , wherein the natural cooler is a cooling tower.

15. The chilled water cooling system of claim 13 , wherein the natural cooler includes a first heat exchanger that uses cold water resources as a cooling medium.

16. A chilled water cooling system, comprising:

a natural cooling circuit including a natural cooler, a chilled water main pump, at least one first pipeline, and a terminal heat exchanger connected in series, the terminal heat exchanger being disposed at a location in need of cooling; and

a mechanical cooling circuit including a chilled water main machine, a chilled water auxiliary pump, and at least one second pipeline connected in series,

wherein the mechanical cooling circuit is connected in parallel with the natural cooling circuit through a first heat exchanger,

wherein the chilled water main machine is an air-cooled chilled water main machine, and the first heat exchanger having a first portion connected to the natural cooling circuit and a second portion connected to the mechanical cooling circuit, and

wherein the second portion of the first heat exchanger is connected in series with a thermal storage device disposed in the mechanical cooling circuit.

17. The chilled water cooling system of claim 16 , wherein the natural cooler includes a second heat exchanger that uses cold water resources as a cooling medium.

18. The chilled water cooling system of claim 17 , wherein the second heat exchanger is a plate heat exchanger.

19. A chilled water cooling system, comprising:

a natural cooling circuit including a natural cooler, a chilled water main pump, at least one first pipeline, and a terminal heat exchanger connected in series, the terminal heat exchanger being disposed at a location in need of cooling; and

a mechanical cooling circuit including a chilled water main machine, a chilled water auxiliary pump, and at least one second pipeline connected in series,

wherein the mechanical cooling circuit is connected in parallel with the natural cooling circuit through a controllable connecting device,

wherein the chilled water main machine is a water-cooled chilled water main machine,

wherein the water-cooled chilled water main machine includes a first cooling tower,

wherein the natural cooler includes a second cooling tower,

wherein the first cooling tower is incorporated into the natural cooling circuit via third pipelines, a first valve, and a second valve, the first valve and the second valve being disposed on an input side and an output side of the first cooling tower, respectively, and

wherein, in a natural cooling mode, the first cooling tower and the second cooling tower are connected in series by turning on the first valve and the second valve.