A single rack can now handle more than 1 megawatt of heat dissipation using liquid cooling—without the need for complex multi-phase systems. That’s the promise of CoolIT’s latest MCA platform, which has quietly become a turning point in how data centers manage thermal loads at scale.
The shift from air to single-phase liquid cooling isn’t just about raw performance numbers. It’s about rethinking the entire power infrastructure of modern facilities. Traditional multi-phase systems, while effective, require significant space and specialized hardware to handle phase changes. CoolIT’s approach sidesteps those constraints by relying on a closed-loop design that moves pre-cooled liquid through racks, absorbing heat before it returns to a central chiller. The result? A system that can dissipate up to 1.2 MW per rack—more than double what was previously feasible with single-phase setups.
For data center operators, the implications are immediate. Racks packed with high-performance GPUs or AI workloads generate immense heat, often pushing thermal limits. CoolIT’s platform addresses this by integrating directly with existing power distribution units (PDUs), eliminating the need for separate cooling loops or chilled water systems. The liquid is pre-cooled to temperatures as low as 10°C before entering the rack, ensuring consistent performance even under peak loads.
That’s the upside—here’s the catch. While the system avoids phase changes, it still demands precise temperature control and careful planning of fluid paths. A poorly designed layout can lead to uneven cooling or increased pressure drops, negating some of the efficiency gains. Additionally, the platform’s effectiveness hinges on the chiller’s ability to maintain sub-ambient temperatures, which requires significant power input. At 1 MW per rack, the system itself consumes roughly 30 kW of electricity just to operate, a tradeoff that operators must weigh against traditional air cooling methods.
Despite these constraints, the platform has already found traction in hyperscale environments where thermal density is a critical concern. CoolIT’s MCA (Modular Chilled Architecture) is being deployed in facilities where space is at a premium, and power efficiency is non-negotiable. The absence of phase changes also reduces maintenance complexity—no need for specialized pumps or evaporators that can fail under heavy loads.
Looking ahead, the question isn’t whether single-phase liquid cooling will dominate, but how quickly it can scale. Multi-phase systems still hold advantages in certain scenarios, particularly where ultra-low temperatures are required. However, CoolIT’s breakthrough suggests a future where liquid cooling becomes as standard as air cooling—just without the added complexity.
