Introduction to the liquid cooling method of server high heat dissipation water chiller

The cooling methods of high-heat-density water-cooling machines for servers are mainly air-cooling and liquid-cooling. They exchange heat for the heating components of the server and take away the heat. When the high-heat-density water-cooling machine for servers adopts liquid cooling, liquid-cooled servers must be used. This server refers to a server that injects liquid into the server and takes away the heat of the server through hot and cold exchange.

1. Operation process of server high heat density water chiller
The liquid cooling system of the server’s high heat dissipation water cooler mainly consists of a primary side heat exchange part and a secondary side heat exchange part. The primary side refers to the loop that takes away heat from the server and uses the loop medium on the secondary side for heat dissipation. The secondary side refers to the loop that removes heat from the primary side to the outdoor environment or other heat recovery units.
2. Main forms of liquid cooling of high heat dissipation water chillers for servers
The liquid cooling forms of high heat dissipation water coolers for servers are mainly divided into spray type, cold plate type and immersion type. The main difference between the three types is reflected in the different heat dissipation methods for the server. Spray-type liquid cooling is to spray coolant on the heat dissipation components of the server to take away the heat generated by the server; cold-plate liquid cooling is to use liquid-cooling cold plates to dissipate heat in large power-consuming components such as the server’s CPU, and other A small number of heating components such as hard drives, interface cards, etc. still use air-cooling heat dissipation systems; immersion liquid cooling means that the heating components of the server are completely immersed in the coolant, and the heat of the server is carried away through convection or phase change of the coolant. Take the cooling system. Secondly, spray-immersed servers do not have fans, while cold-plate servers have fans. The details are as follows:
  • Spray liquid cooling system

The spray-type direct liquid cooling of the server’s high heat-density water cooling machine is an accurate spray and direct contact liquid cooling technology for electronic equipment. The coolant can be directly sprayed to or connected with the heating components of IT equipment through gravity or system pressure. Connected to the solid thermally conductive material and perform heat exchange with it to achieve thermal management of IT equipment. During the heat exchange process, the free liquid level of the coolant in the IT equipment is lower than the cooling heating device or the solid thermal conductive material connected to it. The system can exchange heat with the coolant through the heat exchange unit outside the IT equipment to meet the requirements. Recycling requirements.

  • Cold plate liquid cooling system

The basic working principle of the server high heat dissipation water cooler cold plate liquid cooling cabinet is described as follows: the cold plate assembly is used to contact the high heat flux component, the heat is exported through the cooling medium in the cold plate assembly, and then heated through one or more cooling circuits. Exchange transfer is a liquid cooling method that dissipates the heat of the equipment to the external environment or recycles it.

  • Immersion liquid cooling system

The basic working principle of the submerged liquid-cooled cabinet is described as follows: By immersing electronic information equipment in the cooling liquid, the cooling liquid takes away heat as a form of heat dissipation. According to the different forms of coolant during heat dissipation, it is divided into phase change and single-phase liquid cooling.

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