Cooling company Accelsius has officially launched its new two-phase cooling system.

The company, which provides two-phase direct-to-chip liquid cooling systems, this week officially announced NeuCool, its in-rack solution. The company is taking orders now, with deployments planned to begin later this month.

Texas-based Accelsius was founded in 2022 by Innventure LLC. The company is commercializing technology developed by Nokia's Bell Labs.

The company says NeuCool offers capacity that has been tested beyond 1,500 watts per server chip (CPU, GPU, hot components), and is useful for AI and other intensive workloads. It says the system can offer a PUE of 1.08.

“Our team has worked tirelessly to prepare for this day,” said Josh Claman, Accelsius’ CEO. “Over the past several months, we’ve been finalizing development and testing, building out our partner network, taking orders, and scheduling deployments of our NeuCool systems as part of our Ascent Journey Program. Now we’re ready to expand engagements with partners and customers in person to show them this new era of cooling technology.”

NeuCool’s system sees vaporators (also known as cold plates) mounted directly to targeted hot-spot chips. Dielectric refrigerant flows through the vaporators, where it nucleates into a vapor, which then travels to a CDU and condenses back into a liquid in a closed-loop system, then returning to the vaporator for additional cooling.

Direct-to-chip systems usually rely on water, which has a high heat capacity, but Accelsius is using a dielectric coolant, and allowing it to boil in the circulating system, to remove more heat.

Accelsius said NeuCool’s modular design enables integration into existing data center facilities via water-cooled doors, dry coolers, or other heat rejection methods.

The NeuCool technology was acquired from Nokia's Bell Labs, where it had been developed for five years, but not productized. No Bell Labs staff came to Accelsius.

The company announced it was conducting on-site field trials of its system late last year.

Earlier this month, Accelsius announced a partnership with OptiCool to develop waterless, direct-to-chip liquid cooling systems.