本案例研究描述了一家全球金融服务公司如何在其遗留数据中心环境中进行能效改进，这些改进可应用于具有传统冷水冷却设计的其他设施。项目开始时，设施用电效率（PUE）比为2.3，降低了34%至1.49，从而显著降低了能源和运营成本，提高了机架密度和系统容量。这是通过能源评估和数据大厅气温调查、操作员教育研讨会、实施空气管理改进、优化冷却装置风扇控制、逐步增加空气和冷却水温度设定点（以确保节能不会影响可靠性）以及安装免费冷却回路来实现的。引文:伊利诺伊州芝加哥ASHRAE交易——第121卷第1部分

This case study describes how a global financial services firm made energy-efficiency improvements in their legacy data center environments, which can be applied to other facilities with traditional chilled-water cooling designs. The facility power usage effectiveness (PUE) ratio was 2.3 at the start of the program and was reduced by 34% to 1.49, resulting in significant energy and operational cost reductions and enhanced rack densities and system capacities. This was achieved through an energy assessment and data hall air temperature survey, operator education workshops, implementation of air management improvements, optimization of cooling unit fan control, a gradual increase in air and chilledwater temperature setpoints (to ensure energy savings did not compromise reliability), and installation of a free cooling circuit.