Large two-phase flow cooling system and method for pump drive cavitation self-repairing

Abstract

The invention discloses a pump drive cavitation self-repairing large-scale two-phase flow cooling system and a method thereof.The system comprises an evaporation cold plate of electronic equipment and a condenser, the evaporation cold plate of the electronic equipment is connected with the condenser, the condenser is connected with a liquid storage tank, a liquid level sensor is arranged in the liquid storage tank, and the liquid level sensor is connected with the evaporation cold plate of the electronic equipment; two pipelines are arranged at the bottom of the liquid storage tank and connected with a liquid supplementing tank, a liquid return one-way valve is arranged on one pipeline, a liquid supplementing one-way valve is arranged on the other pipeline, a refrigerant filling opening is formed between the liquid return one-way valve and the liquid supplementing tank, a liquid supplementing pump is arranged between the liquid supplementing one-way valve and the liquid supplementing tank, and a liquid supply pump is connected to the bottom of the liquid storage tank. And the liquid supply pump supplies liquid to an evaporation cold plate of the electronic equipment. Self-repairing and self-starting of the pump after cavitation are achieved, and the engineering applicability and reliability of a large two-phase flow cooling system are improved.

Description

technical field [0001] The present invention relates, in particular, to a large-scale two-phase flow cooling system and a method for pump-driven cavitation self-repairing. Background technique [0002] With the continuous increase of heat consumption and single-point heat flux density of large-scale high heat flux density electronic equipment (radar, data center, etc.), the use of active two-phase flow cooling system overcomes the limitations of single-phase liquid cooling. : The demand for cooling liquid flow is reduced, and the weight of the pipeline system and the end cooling unit is reduced; the temperature of the liquid supply does not need to be too low to avoid the risk of equipment condensation; the leakage of cooling liquid will not cause short circuit and ignition of electronic equipment, and improve safety. [0003] The two-phase flow cooling system has strict requirements on the liquid supply pump and the state of the refrigerant before the pump. It must be ensur...

AI Technical Summary

Problems solved by technology

[0005] The existing technology prevents pump cavitation under steady-state operation of the two-phase flow cooling system, but cannot completely eliminate the possibility of cavitation under transient conditions, such as: 1) When the cooling system has just completed refrigerant charging, the system The refrigerant in each component and the pipeline is in a gas-liquid two-phase state. The saturated vapor of the refrigerant in the pump and the pipeline before the pump needs a long time to stand still before it can completely enter the liquid storage tank. This process is very important for large electronic equipment. The cooling system lasts for tens of minutes, and the pump cannot be started due to cavitation before the gas in the pump and the pipeline in front of the pump is discharged.

2) When the load of electronic equipment stops suddenly, the heat source on the evaporative cold plate of the system drops from high heat consumption to zero suddenly, and the liquid refrigerant driven by the pump quickly fills the flow channel of the cold plate, and all the original refrigerant vapor in the cold plate enters into condensation in a short time The condenser exceeds the heat exchange capacity of the condenser, and a large amount of saturated gas-liquid two-phase flow enters the liquid storage tank from the condenser. The gas-liquid separation cannot be completed quickly and completely in the liquid storage tank, and the gas-liquid two-phase refrigerant flows into the pump, causing cavitation shutdown , and after stopping, it needs to stand for a long time until the gas in the pump is discharged before restarting the machine

Images