基于仿真的小型数据中心气流组织研究

To allow small data center to work under the office environment to reduce the operating cost, an integrated design of noise reduction and refrigeration is proposed by combining the vapor compression refrigeration system with the server. Based on the verified simulation method of two key component, axial flow fan and evaporator, an airflow organization simulation model for this complex system is developed to predict the airflow and heat transfer. Nonuniformity evaluation indexes based on information entropy and variance are set up to evaluate the influence of different fan arrangement modes on the uniformity of server temperature field. The strategy to deal with larger heat density is analyzed. The results show that the nonuniform momentum drive of axial flow fan leads to uneven flow and heat transfer in the evaporator. The designed noise reduction and refrigeration system is able to maintain the exhaust temperature of the server between 21.6℃ and 22.2℃. Increasing the number of cooling fans can improve the uniformity of temperature field. When heat density increases, increasing the ventilation rate of the server can effectively reduce the exhaust temperature.