Studying On Energy-Saving New Date Center Air-conditioning System Based On Radialion-convection Coupled High Efficiency Heat Exchange

In today's data age and in the future AI era,data information is considered to be the most valuable substance.As an important place for data information storage and processing,the data center is growing rapidly in scale and quantity.As a result,the electricity consumption of the data center is more prominent in the whole society.What's more,the energy consumption of air conditioning and refrigeration system accounts for 40% to 50% of the total energy consumption of the data center.In addition,a few existing data center air conditioning systems have some problems such as the uneven airflow organization and hot spot agglomeration,which are potential threats to the safe operation of the unit.In order to improve the energy efficiency of the air conditioning system in the data center and improve the distribution of indoor airflow,this paper proposes a new heat exchange system of data room which based on a coupled heat transfer process of convection and radiation,and carries out research and optimization for the flow and heat transfer process of the new system.In this paper,the numerical model of the data room air conditioning system is established firstly,and the reliability of the numerical model is verified by experimental data.On this basis,the flow field distribution and thermal environment characteristics of the new data room air conditioning system are studied and compared with the system of traditional data room.After analyzing the indoor air distribution characteristics of the new coupled air conditioning system,this paper carried out the organization of indoor airflow from the aspects of the radiation module surface temperature,the air supply temperature parameter and the baffle setting angle.This optimization will further improve the uniformity and cooling effect of the airflow organization in the data room.Finally,the paper studies the influence of the closed cold aisle on the airflow distribution and thermal environment of the new data room air conditioning system with additional baffles,and optimize the air supply temperature of the air conditioner under this condition.The research results in this paper show that the addition of radiation module,deflector and the closed cold channel is beneficial to solve the local hot spot problem in the data room environment and improve the cooling effect of the equipment room.When the surface temperature of the radiation module is between 20 ?-26 ?,the cooling effect of the coupled air conditioning system has little difference.So this paper suggests that the surface temperature of the radiation module within the range can be selected according to the actual situation.The angle of the deflector has a certain influence on the cooling effect of the coupled air conditioning system.When the angle of the deflector is 45°,the improvement effect of the local hot spot in air conditioner system is optimal.As a prerequisite,to ensure the cooling effect,the addition of the radiation module can increase the air supply temperature of the air conditioner by 2 ° C,while the addition of the baffle and the radiation module can increase the temperature by 3 ° C.And the addition of a baffle,a radiation module and a closed cold aisle can increase the air supply air supply temperature by 3 ° C.Both the indoor air distribution is more uniform than in the case of an unsealed cold aisle.The research in this paper will help to improve the COP value of the air conditioning system and reduce the PUE value of the data center.At the same time,the research results will provide new ideas and references for the design of the green data room.