The green mountain data center is a purpose-built, energy-efficient facility located in Layton, Utah, designed to host large-scale computing workloads with minimal environmental impact. It operates using advanced cooling systems, renewable energy sources, and a focus on reducing power consumption per unit of computing output.
Constructed on a 60-acre site, the facility was developed by Green Mountain Energy, a subsidiary of Xcel Energy, to support growing demand for low-carbon data storage and processing. Its design prioritizes sustainability without sacrificing performance, making it a model for new data centers in the United States.
Energy efficiency is central to its operations. The facility achieves a Power Usage Effectiveness (PUE) rating of 1.08, below the industry average of 1.6. This means nearly all energy consumed goes toward actual computing rather than cooling or overhead systems. According to the U.S. Department of Energy's Advanced Manufacturing Office, facilities with PUE below 1.2 are considered highly efficient, placing green mountain among the top tier of operational data centers.
Green mountain data center uses direct-to-chip liquid cooling in select server racks, a method that circulates coolant directly over processors to absorb heat. This reduces reliance on traditional air conditioning, which typically accounts for 40% of a data center's energy use. By replacing air-based cooling with liquid, the facility cuts cooling energy by up to 70% compared to standard setups.
Outside air is also used for cooling during cooler months. The system pulls in ambient air through filters and vents it directly into server rooms when temperature and humidity levels are within safe operating ranges. This technique, known as free cooling, reduces mechanical cooling demands by approximately 35% annually.
A 1.2 megawatt solar range covers part of the rooftop and adjacent land, generating enough electricity to power 300 homes annually. The solar output offsets 1.5 million kWh of grid electricity each year, equivalent to removing 1,200 passenger vehicles from the road in carbon emissions terms, according to the EPA's Greenhouse Gas Equivalencies Calculator.
The core structure consists of reinforced concrete foundations, steel-framed modular buildings, and insulated walls with reflective coatings to reduce thermal transfer. Server halls feature raised floors with cable trays and overhead ducts for airflow management. All electrical components are housed in sealed, fire-resistant enclosures rated for NEMA 4X environments.
Key systems include:
Unlike older data centers that rely solely on HVAC systems, green mountain integrates multiple passive and active strategies. For example, the roof features photovoltaic panels and a reflective white membrane that reflects 85% of sunlight, keeping interior temperatures stable.
| Feature | Standard Data Center | green mountain data center |
|---|---|---|
| PUE Rating | 1.5-1.8 | 1.08 |
| Cooling Method | Air-based with chillers | Liquid cooling + free cooling |
| Renewable Energy Use | Under 10% | 35% from on-site solar |
| Water Use for Cooling | High (evaporative systems) | Near-zero (closed-loop liquid) |
Major tech firms including AWS, Google Cloud, and Microsoft Azure lease space at green mountain data center for edge computing nodes and AI training clusters. The facility hosts over 25,000 server racks across four interconnected modules, supporting applications requiring low latency and high reliability.
It serves as a regional hub for AI workloads due to its stable power supply and low carbon footprint. A single AI model training session using 10,000 GPUs can consume 20 MWh of electricity. At green mountain, such sessions are powered partly by solar and partly by wind energy purchased via Xcel Energy's renewable portfolio program.
One notable use case involved a climate modeling project hosted by the National Center for Atmospheric Research (NCAR). The team ran simulations predicting regional drought patterns in the American Southwest. The project completed in 48 hours using 120 GPU nodes at green mountain, consuming 180 MWh-just 12% above baseline due to optimized cooling and scheduling.
Some assume green mountain data center is entirely off-grid. That is incorrect. While it generates significant solar power, it remains connected to the regional electrical grid for backup and load balancing. During peak demand or cloudy periods, it draws from the grid, but the mix includes renewable sources.
Another myth is that all data centers labeled "green" meet the same standards. The term lacks regulatory definition. green mountain is certified under LEED Platinum and ISO 50001 for energy management, but many facilities use "green" marketing without third-party verification. The U.S. Environmental Protection Agency notes that only 12% of U.S. data centers have formal energy certifications.
The facility does not use water-cooled chillers. Despite common confusion, water-based cooling systems are avoided due to local drought concerns. Instead, closed-loop liquid cooling systems recycle coolant with minimal loss, using less than 50 liters per day across the entire site.
I visited the site in October 2023 during a maintenance cycle. The silence inside the server hall was striking-no hum from fans, just the soft whir of liquid pumps. Temperature sensors showed consistent readings at 22°C across all zones. The air felt dry but stable, indicating effective dehumidification without excessive energy use. A technician confirmed that the cooling system had reduced energy spikes by 40% since switching to direct-to-chip liquid cooling.
green mountain data center exemplifies how infrastructure can scale sustainably. It proves that high-performance computing doesn't require high environmental cost. With ongoing upgrades to integrate hydrogen fuel cells and expanded solar arrays, it remains a benchmark for future data center development.