Carrier’s AquaEdge® 19MV4 Helps Solve Rising Thermal Density Challenges in AI Data Centres

As AI forces IT loads to densify and ambient temperatures climb, data centre downtime risk increases without guaranteed continuous cooling. Carrier has developed the AquaEdge 19MV4 variable-speed centrifugal chiller, part of its Carrier QuantumLeap™ solutions for data centres, to overcome these challenges. Designed for mission-critical environments, the unit delivers the capacity, resilience, and efficiency required to safeguard high-density operations under extreme thermal stress. Carrier is part of Carrier Global Corporation (NYSE: CARR), global leader in intelligent climate and energy solutions.

"AI workloads are reshaping data centre specifications, pushing our customers to seek greater thermal headroom without sacrificing power stability," says Marti Urpinas, Carrier’s Senior Technical Manager, Vertical Markets EMEA, DC Applied. "That sounds like a tall order, but the AquaEdge 19MV4 isn’t a ‘standard’ chiller. It’s a variable-speed centrifugal platform that delivers cooling continuity for high-density racks, even as operators push chilled-water temperatures higher to support direct-to-chip architectures."

The AquaEdge 19MV4 addresses the requirements of high-density facilities through integrated engineering. Delivering 2.1 to 3.3 MW* of cooling capacity, the unit manages heat generated by Graphics Processing Units (GPUs) and Tensor Processing Units (TPUs), optimising mechanical room layouts.

To guarantee operation amid rising temperatures, the chiller runs with chilled-water temperatures up to 35°C and condensing temperatures up to 55°C. This flexibility supports direct-to-chip liquid cooling and rear-door heat exchangers. To accommodate AI compute fluctuations, Carrier’s EquiDrive™ two-stage centrifugal compressor modulates from 10% to 100% load, preventing short-cycling during inference tasks or idle periods. The AquaEdge 19MV4 achieves up to a COP of 6.75 and an IPLV of 11.4 under AHRI (Air-Conditioning, Heating and Refrigeration Institute) test conditions **. These peak and part-load efficiencies may help free up utility grid demand charges, lower Power Usage Effectiveness (PUE) and unlock stranded mechanical power. As a result, operators can deploy more revenue-generating IT racks within the same electrical footprint.

To help prevent overheating risks in high-density chips in the event of a cooling failure, the AquaEdge 19MV4 restarts within 150 seconds of a power outage, enabling progressive thermal recovery to protect hardware. Power quality is also protected. The chiller uses Active Harmonic Filters to keep Total Harmonic Distortion of Current (THDi) below 5%, shielding IT infrastructure and Uninterruptible Power Supplies (UPS) from electrical noise and reducing maintenance risks.

The AquaEdge 19MV4 supports corporate objectives by maintaining noise operation below 80 dBA*** for workplace comfort. It also offers compliant low-GWP refrigerants R-1234ze and R-515B, in line with EU F-Gas Regulation requirements.

As part of Carrier QuantumLeap™ solutions for data centres, the AquaEdge® 19MV4 strengthens Carrier’s end to end cooling portfolio, helping operators build resilient, energy efficient infrastructures capable of supporting the rapid growth of AI and high performance computing workloads.

Learn more about Carrier QuantumLeap™ solutions

* Performance conditions: 20/30°C chilled water and 49/55°C condensation loop under AHRI conditions

** AHRI conditions

*** Performance conditions: 7/12°C chilled water and 30/35°C condensation loop under AHRI conditions