Abstract: On the basis of comprehensive analysis of heat pipe technology and inverter and VRF technology, A new heat pipe air condition system is proposed, The prototype experiment is carried out, the results shows: The new heat pipe air condition system directly conveys refrigerant into data room, which resolves the risk of water entering the data room, solves the problem of low efficiency of multiple heat transfer, improves the evaporation temperature of the system and expands the utilization time of free cooling; The new heat pipe air condition system can switch different operation modes according to outdoor temperature and indoor load,it has simple structure and high reliability; The new heat pipe air condition system makes full use of free cooling source, takes advantage of high COP and low cost of liquid heat pipe, The AEER is much higher than that of conventional Crac; The new heat pipe air condition system overcomes the shortage of low COP of magnetic suspension compressor, solves the problems of low pressure ratio energy regulation and non-uniformity of multi-terminal liquid separation, compensates insufficient pressure head at low pressure ratio, with the application of regional energy saving means such as air cooling, water cooling and evaporative cooling, it provides a new thinking and direction for cooling large data centers all year round.

Key words: Data center, Free cooling, Energy saving, Heat pipe