Study Of Supply Air Temperature Control Strategy Based On The CFD Online Feedback Of Data Center

With the continuous development of network technology and Internet business,the number and size of data room are increasing year by year.Most of the data room has the characteristics which are large acreage,large number of equipments,large heat generation,all-day non-intermittent operation.How to design the air supply parameters of the air conditioning reasonably to ensure the continuous operation of the equipment safely is becoming more and more important.At the same time,air conditioning power consumption accounts for a larger proportion of the energy consumption that is consumed by data room which as a large energy-consuming.And only the data room indoor parameters of the macro control is considered in the process of the data room air conditioning designed.Even in the controlling process of the data room running actually,usually the overall temperature or channel temperature of the data room can be controlled extensively,not reaching the purpose that the equipment running environment is controlled precisely.In order to make the equipment running in an absolutely safe temperature range,the operation and maintenance personnel generally set a relatively low air conditioner temperature,there are resulting in a great waste of cold power.Therefore,under the condition that the equipments runs safely,it has important significance for reducing the energy consumption of the data room by reasonable control of the data room air conditioning parameters.CFD technology has been widely used in data room in recent years,which can help to obtain detailed thermal environment data of data room and provide predictive verification for the formulation of control strategy.First of all,this paper takes a data room in Guangzhou as the research object,and analyzes the energy consumption and thermal environment test.The CFD software is used to simulate the data room,and the feasibility of the numerical model of the data room is verified by comparison with the measured data.Secondly,according to the principle of the data room air-conditioning system running,the various air-conditioning running mode under different control modes is analyzed and compared mutually.The control strategy based on the outlet temperature of each channel cabinet of the data room air-conditioning air supply temperature is putted forward for the purpose that the problem of supercooling in the data room is resolved by improving air-conditioning air supply.By analyzing the influencing factors of the temperature of the cabinet,the main influencing variables are found,and the temperature fitting equation of each cabinet is obtained by using the regression method.Then,from the simulation software PHOENICS calculation principle,it is secondally developed with the data room air conditioning control system.The system realizes the feedback control of CFD simulation on-line calculation,real-time statistical feedback of cabinet temperature and air conditioning air supply temperature.System function design,program design and interface design,for the future development of air conditioning controller room to provide a new reference.Finally,the control strategy is verified by simulation in the data room.thermal environment,the quantity of wind temperature and cold cabinet utilization coefficient is analyzed before and after adjustment.the results show that by using the control strategy all cabinets in a safe operating temperature range,and the air conditioning supply air temperature can increase 1?~3?,the cooling capacity utilization coefficient can be increased from 1.14 to 1.59,has a lot of energy saving efficiency.