The Investor
30 Sep 2026, 18:38
Trane Technologies Demonstrates 800-Volt DC Chiller for AI Data Centers
Trane Technologies said it successfully demonstrated what it describes as the industry’s first 800-volt direct current cooling architecture for next-generation AI factories and gigawatt-scale data centers.
Working with Eaton and Danfoss, Trane modified an existing high-efficiency chiller to operate on an 800 VDC feed. The proof-of-concept delivered more than 1,000 tons, or 3.5 MW, of cooling capacity while demonstrating the potential for up to a 2% improvement in system efficiency compared with conventional AC-powered systems.
The architecture is designed to reduce power-conversion losses. Traditional cooling systems rely on multiple AC conversion stages to run compressors, pumps and fans, while direct DC input can eliminate some of those losses.
Trane said that in a typical 200 MW data center, the efficiency improvement could free up as much as 1.8 MW of additional compute capacity. That could support up to fifteen 120 kW racks or as many as three 600 kW racks.
The demonstration is part of Trane Technologies’ broader push into AI data center thermal management, which includes chillers, liquid cooling infrastructure, coolant distribution units, air handlers, digital twins and automated plant controls.
The company sees the 800 VDC architecture as a step toward fully DC-powered mechanical cooling infrastructure, which could become increasingly important as AI workloads drive higher power densities and operators seek to maximize computing capacity per megawatt.
Trane Technologies said it successfully demonstrated what it describes as the industry’s first 800-volt direct current cooling architecture for next-generation AI factories and gigawatt-scale data centers.
Working with Eaton and Danfoss, Trane modified an existing high-efficiency chiller to operate on an 800 VDC feed. The proof-of-concept delivered more than 1,000 tons, or 3.5 MW, of cooling capacity while demonstrating the potential for up to a 2% improvement in system efficiency compared with conventional AC-powered systems.
The architecture is designed to reduce power-conversion losses. Traditional cooling systems rely on multiple AC conversion stages to run compressors, pumps and fans, while direct DC input can eliminate some of those losses.
Trane said that in a typical 200 MW data center, the efficiency improvement could free up as much as 1.8 MW of additional compute capacity. That could support up to fifteen 120 kW racks or as many as three 600 kW racks.
The demonstration is part of Trane Technologies’ broader push into AI data center thermal management, which includes chillers, liquid cooling infrastructure, coolant distribution units, air handlers, digital twins and automated plant controls.
The company sees the 800 VDC architecture as a step toward fully DC-powered mechanical cooling infrastructure, which could become increasingly important as AI workloads drive higher power densities and operators seek to maximize computing capacity per megawatt.
