Research On Air Conditioning Scheme And Energy Saving Of High Heat Density Data Center

With the development of my country’s informatization and the introduction of new infrastructure,the construction of data centers has received further attention.The energy consumption of the data center is relatively large,in addition to the energy consumption of indispensable electronic information equipment such as servers and switches,the energy consumption of the refrigeration and air-conditioning system for the heat dissipation of the electronic equipment is also very large,which can account for 30% to 50% of the total energy consumption of the data center,therefore,energy-saving research on air conditioning systems in data centers is very important.At present,data centers in our country have some common problems such as chaotic airflow organization and uneven regional cooling.The resulting local hot spots and cold energy waste will cause the problems of low reliability of electronic equipment operation and increased energy consumption.In order to further improve the cooling efficiency of the data center and reduce the energy consumption of the cooling system,this paper establishes a CFD model for specific cases of the data center,carries out numerical simulations,and conducts the following studies:1)Research on typical data center air-conditioning schemes: through numerical simulation of typical cases,two types of air-conditioning schemes at room level and row level are studied respectively,including air supply above the air duct with closed cold aisles,and under-floor air supply with closed cold aisles.The air supply between rows is matched with typical schemes such as cold pools,and the specific usage and advantages and disadvantages of each scheme are analyzed.2)Research on the new air-conditioning unit and its modular data center air-conditioning scheme:according to the actual development needs of the data center,creatively propose a modular air-conditioning unit installed under the raised floor and its corresponding modular data center solution Program.The operation simulation of the cabinet server shows that the 21 servers in the same cabinet that use the air conditioning unit to dissipate heat are operating in good condition,and the operating temperature among the servers is even.The new air conditioning solution can further improve the airflow organization and the cooling surrounding of equipments in the computer room.3)Comparative study on the thermal environment and energy consumption of multiple air conditioning schemes: the current mainstream room-level schemes,row-level schemes and new modular air-conditioning schemes are respectively adopted in a typical data center model of the same scale.Simulation and analysis of the impact of three different air conditioning schemes on the airflow field,temperature field and energy consumption of the computer room space.The research results show that the new modular solution not only has better airflow organization and uniform temperature field,but also has good energy consumption performance.In the case of this article,the new modular solution cools 20% and 33% more server cabinets than the room-level and row-level solutions,and saves energy consumption by 52.9% and 20.9%,respectively,compared with the above two solutions.4)Data center TAC system analysis and energy-saving value research: in view of the mainstream room-level solutions in dealing with the local hot spots and cooling waste in local high-heat-density data centers,innovatively combine the new modules proposed in this article,the TAC air-conditioning system is applied to the transformation of the room-level data center.The transformed room-level data center can customize the required cooling capacity according to the cabinets of different powers,avoid the occurrence of local hot spots and waste of cooling capacity,thereby improving the temperature field of the computer room and effectively reducing energy consumption.In the case of this article,the calculation results of energy consumption throughout the life cycle of the data center show that the air-conditioning energy consumption of the data center after the transformation of the TAC system is only 65% ??of the previous value,which has good energy saving value.