Two-phase cooling system

Abstract

A two-phase cooling system for circulating a coolant to cool a heat source includes a pump, a liquid cooling pipe, a cooling and heat dissipation device, a liquid-gas two-phase pipe, a heat exchanger, and a cooling liquid pipe connected in sequence. The pump delivers the coolant through the liquid cooling pipe to the cooling and heat dissipation device in contact with the heat source, where the coolant cools the heat source. A portion of the coolant evaporates upon heating to form vapor. The vapor and coolant are transported through the liquid-gas two-phase pipe to the heat exchanger, where they are cooled and the vapor condenses back into coolant. The condensed coolant is then transported back to the pump through the cooling liquid pipe. By placing the heat exchanger above the pump, the vapor and coolant are naturally separated by gravity and density difference, thereby improving cooling efficiency.

Claims

1. A two-phase cooling system for circulating a coolant to cool at least one heat source, comprising: at least one pumping device for increasing the pressure of the coolant to facilitate pressurized delivery of the coolant; at least one liquid cooling pipe connected to the pumping device, the pumping device delivering the coolant to the liquid cooling pipe; at least one cooling and heat dissipation device connected to the liquid cooling pipe, the cooling and heat dissipation device contacting the heat source, the coolant in the liquid cooling pipe being delivered to the cooling and heat dissipation device to cool the heat source, wherein a portion of the coolant evaporates upon heating to form vapor; at least one liquid-gas two-phase pipe connected to the cooling and heat dissipation device, the coolant and the vapor in the cooling and heat dissipation device being delivered to the liquid-gas two-phase pipe; At least one heat exchanger is connected to the liquid-gas two-phase pipe, through which the coolant and the vapor in the liquid-gas two-phase pipe are transported to the heat exchanger for heat exchange, so that the vapor condenses back into the coolant; and at least one cooling liquid pipe is connected to the heat exchanger and the pump device, through which the coolant in the heat exchanger is transported to the pump device, wherein the heat exchanger is located above the pump device.

2. The two-phase cooling system as claimed in claim 1, wherein the heat exchanger is located above the cooling and heat dissipation device.

3. The two-phase cooling system as claimed in claim 1, wherein the two-phase cooling system is mounted on a rack and the heat exchanger is located at the top of the rack.

4. The two-phase cooling system as claimed in claim 1, wherein the two-phase cooling system is mounted on a frame and the pump assembly is located at the bottom end of the frame.

5. The two-phase cooling system as claimed in claim 1, wherein the two-phase cooling system is mounted on a frame, the heat exchanger is located at the top of the frame, the pump assembly is located at the bottom of the frame, and the cooling and heat dissipation device is located between the heat exchanger and the pump assembly.

6. The two-phase cooling system as claimed in claim 1, wherein the diameter of the liquid-gas two-phase pipe is larger than the diameter of the liquid cooling pipe.

7. The two-phase cooling system as claimed in claim 1, wherein the cooling device includes a server's cold plate.

8. The two-phase cooling system as claimed in claim 1 further includes at least one liquid storage tank connecting the heat exchanger and the cooling liquid pipe, wherein the coolant in the heat exchanger is transported to the cooling liquid pipe via the liquid storage tank.

9. The two-phase cooling system as claimed in claim 8, wherein the liquid storage tank is located above the pump assembly and the cooling heat dissipation device.

10. The two-phase cooling system as claimed in claim 8, wherein the liquid storage tank is adjacent to the heat exchanger.

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