The Challenge
A Tier 3 Data Center was seeking ways to increase efficiency and lower operating costs. The scope included design, engineering, project and construction management, commissioning, and utility incentive processing. The facility required 100% up-time during all phases of the project, making planning and precision communication a must for everyone involved.
The Solution
A water-side economizer (WSE) was installed to maximize free cooling hours with seamless, automatic operation. A 1,500-ton plate and frame heat exchanger were also installed, and the chiller plant systems were completely re-piped. A retrofit of 86 individual fifty-ton computer room air handling units (CRAHs) with variable-speed electronically commutated (EC) plug fans. To monitor and control the data hall cooling equipment, a combination of hard-wired and wireless rack temperature and under-floor pressure sensors, which reduced fan energy by over 80 percent.
Results
- $575,000 annual energy cost savings
- $48,000 utility incentive
- 8.2M kWh energy savings
- $1.9M project cost
- 1.38 PUE reduced from 1.68
- 30 months simple payback period
- 0.25 kW/ton average chiller plant efficiency when free cooling
- 80% CRAH fan energy reduction
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