Energy-saving Research In Data Centre With Fresh-air System

With the development of server in communication industry, heat dissipation of electronic component increase swiftly. As the high demand of the indoor environment in data centre, rational air distribution should be designed to ensure the equipment running stable in a long time. Directly introducing fresh air system can effectively take advantage of nature cold source, reduce the running time of air-conditioning, theoretically save electric power, prolong the span-life of compressor, save company operating cost and electric resource. Combining with reasonable and effective air distribution system, temperature, humidity and clean air concentration can be guaranteed in order to meet with the need of telecommunication equipment.This paper investigated air-conditioning system for data center through economic analysis and contrary. The results show that directly introducing fresh air system can effectively reduce the operation energy consumption of air conditioning, which has favorable economic and social benefits.The paper used the fluid dynamics simulation software called Fluent to simulate data centre and use experimental data to verify that the result of simulation is feasible and accord with practical condition.The paper simulate different cases as follows:energy-saving effect by reducing air distribution temperature, different structure of air distribution interlayer, changing air reture grille and three different type of air distribution. Through analyzing the temperature and velocity contours, the structure and air distribution scheme of data centre was optimized.The simulation results show that supply air temperature reduction can cut down supply capacity, so that decrease energy consumption of fan to save energy. The air distribution layer of orginal model is lack of uniformity. The simulation results show that when the distance between air distributor and both sides of boundary is 2.8m, the supply air temperature will be uniform. During three different air distribution, the way of bottom supply and top return is more efficient in cooling the server and reducing indoor air temperature.With the rapid development of network server nowadays, how to deal with large heat productivity and provide better air distribution to data centre is worth researching. At the end, the paper suggest a new cooling-pool air distribution to the data centre with large heat capacity. The result of simulation shows that the strategy is effective to cool server and ensure safty of data centre. The solution will verify its reliability in the future.