基于对流辐射耦合换热的新型数据机房空调系统*
New type of data room air conditioning system based on coupled convective and radiative heat transfer
摘要：
针对现有数据机房存在局部环境热点的问题，提出了一种新型的对流辐射耦合换热空调系统。建立数值模型对典型数据机房空调系统进行了模拟研究，通过将模拟结果与实验数据进行对比分析，验证了该模型的可靠性。对比研究了新型数据机房空调系统与传统数据机房空调系统的流场分布及制冷性能。结果表明：在相同的送风温度下，新型数据机房空调系统的机架进口温度分布更加均匀；在满足ASHRAE标准的前提下，新型数据机房空调系统的送风温度可以提高2 ℃，能够有效降低数据机房的电能利用效率；辐射板对数据机房局部热点的改善效果明显，辐射板的温度设置为31 ℃较为合理。
Abstract：
In order to solve the problem of local environmental hot spots in the existing data rooms, presents a new air conditioning system with coupled convective and radiative heat transfer. Develops a numerical model, simulates the air conditioning system in a typical data room, and then verifies the reliability of the model by comparing the simulation results with the experimental data. Compares the flow fields and the cooling performance of the new air conditioning system with those of the traditional air conditioning system. The results indicate that with the new air conditioning system, the inlet air temperature distribution of different racks are much more uniform at the same air supply temperature. The supply air temperature of the new air conditioning system can increase by 2 ℃ when satifying the cooling requirement of ASHRAE standard, which obviously reduces the PUE value of the data center. The radiant plate of the new air conditioning system is demonstrated to be effective to solve the local hot spot problem, and a surface temperature of 31 ℃ is recommended for a better cooling effect and energy saving performance.
Keywords:data room, air conditioning system, coupled convective and radiative heat transfer, radiant plate, hot spot improvement