A pump-driven two-phase circulation loop system was built for data center cooling in order to make full use of the ambient energy. In this study

the cooling loss characteristic of working fluid pump was investigated by changing the system temperature difference

pump frequency

heat exchange area

temperature of the high and low-temperature water jacket. The results showed that the cooling loss rate would be minimum at a temperature difference of 16 ℃

frequency of 15 Hz

and a large heat exchange area when the temperature of high-temperature water jacket was kept constant. When the temperature of low-temperature water jacket was kept constant

the cooling loss rate with five evaporators and five condensers under different temperatures was the smallest and less than 3.20%. The higher the temperature of high- temperature water jacket

the lower the cooling loss rate. When the temperature of high-temperature water jacket was 26 ℃

the cooling loss rate was the lowest and did not exceed 2.82%.