Energy costs have become one of the largest operating expenses for data centers, with power and cooling often exceeding the cost of the IT equipment itself. The industry is responding with innovations in cooling technology, power distribution, and server design that dramatically reduce energy consumption without sacrificing performance.
PUE and Cooling Optimization
Power Usage Effectiveness (PUE) measures data center energy efficiency as the ratio of total facility power to IT equipment power. The industry average PUE is approximately 2.0, meaning that for every watt consumed by IT equipment, another watt is consumed by cooling and power distribution. Leading facilities achieve PUE values below 1.3 through innovative cooling designs and efficient power distribution.
Hot aisle/cold aisle containment is the most impactful cooling optimization for existing facilities. By separating hot exhaust air from cold supply air, containment prevents mixing that forces cooling systems to work harder. Raising the cold aisle temperature from the traditional 68F to 80F, as recommended by ASHRAE, significantly reduces cooling energy without impacting equipment reliability.
Server virtualization and consolidation directly reduce energy consumption by replacing multiple underutilized physical servers with fewer, more efficiently utilized hosts. Modern processors include power management features like dynamic voltage and frequency scaling that reduce consumption during periods of low utilization. Enabling these features across your server fleet can reduce energy costs by 20-30% with no impact on peak performance.