Abstract: With the continuous improvement of server integration and the gradual increase in power density, the problem of heat dissipation has become a major obstacle to the development of servers. Compared with air cooling, liquid cooling has good heat dissipation advantages and has important application prospects in the heat dissipation process of higher power density servers in the future. In addition, liquid cooling technology can effectively reduce the PUE value of the data center and reduce carbon emissions. Based on this, this paper studies the heat dissipation performance of a domestic dual-socket server through experiments. Compared with traditional air cooling, liquid cooling has better heat dissipation effect. Further, by comparing the internal/external circulation liquid cooling performance, it is found that the external circulation liquid cooling has greater heat dissipation regulation performance, wider temperature control range, and more suitable application scenarios. At lower inlet water temperature and larger inlet water flow, the external circulation liquid cooling can obtain better heat dissipation effect.

Key words: thermal design, liquid cooling, energy saving and low carbon, air cooling