中文摘要：

随着社会信息化和对高性能计算的需求，全球数据中心的规模和集成度均以较快的速度增长，由此使得数据中心热耗散功率密度不断攀升，冷却成本大幅增加，传统热管理方案很难适应计算机能耗继续增长的需求。文中提出一种旨在降低数据中心能耗的可对机柜内部直接进行冷却的嵌入式热管理方案，并引入exergy分析方法对分别于机柜内的顶端或各计算单元设置制冷机蒸发器两种热管理方案的性能进行了评估。结果显示，两种方案在可优化Eexergy部分分别较之传统冷却方案高出0．04％和1．05％，表明其在热经济性方面具有优势，可望发展为今后数据中心有前景的热管理方案。

英文摘要：

With the development of information society and the demand of high performance computing, the scale and integration density of data centers over the world are increasing very rapidly, which results in a sustained increase of heat dissipation power density as well as the cooling cost. Conventional method appears incapable in tackling this tough issue to meet the requirement of such developing trend. In this paper, a rack- embedded thermal management strategy to reduce the power consumption of a data center is proposed. An exergy-based analysis method is adopted to evaluate the cooling performance and efficiency of two strategies, which are respectively top- mounted and distributed evaporators inside the rack. The results show that the optimized new strategies are 0.04% and 1.05% higher than that of the traditional ones respectively, which indicates the advantage of the new method for thermal economy. This method is expected to be a promising strategy for future thermal management of data center.