Two-phase liquid cooling system, two-phase liquid cooling cabinet, and method for liquid cooling of electronic devices

A two-phase liquid cooling cabinet comprising:

• a housing accommodating multiple electronic devices with different thermal loads;
• a cooling loop connected to the housing, the cooling loop comprising a supply manifold, a return manifold, and multiple cooling branches connected in parallel between the supply manifold and the return manifold, each of the multiple cooling branches is connected to one of the multiple electronic devices for transferring cooling liquid to the one of the multiple electronic devices;
• and
• an impedance device connected to the cooling loop, and the impedance device increases impedance in each of the multiple cooling branches;
• wherein the impedance device comprises multiple capillary tubes, each capillary tube of the multiple capillary tubes is installed in a respective cooling branch of the multiple cooling branches to increase the impedance in the respective cooling branch, and each capillary tube of the multiple capillary tubes has a predetermined length to further increase the impedance of the respective cooling branch.

A method for liquid cooling of multiple electronic devices with different thermal loads, comprising:

• measuring impedance of cooling fluid in multiple cooling branches of the electronic devices to obtain a highest impedance value, wherein each of the multiple electronic devices is arranged in one cooling branch;
• and
• adding additional impedance to each of the multiple cooling branches, wherein an impedance value of the additional impedance is 1-2 times of the highest impedance value;
• wherein the additional impedance is set through multiple capillary tubes, each the multiple cooling branches is provided with one of the multiple capillary tubes, and the additional impedance of each of the multiple cooling branches is increased by setting the each of the multiple capillary tubes with a predetermined length.