Nexalus Pioneers Sustainable Liquid Cooling for Data Centers
As global data center power consumption skyrockets—driven largely by AI workloads—companies are urgently seeking energy-efficient solutions. Cooling systems, which account for 40% of a data center’s energy use (McKinsey), have become a prime target for innovation.
The Limitations of Traditional Air Cooling
Most facilities still rely on air-based cooling, despite its inefficiency in heat transfer. Tech giants like Amazon are already transitioning to liquid cooling systems to handle power-hungry AI servers. Now, Irish startup Nexalus is advancing the field with a groundbreaking approach that not only improves efficiency but transforms waste heat into a valuable resource.
How Nexalus’ Microjet Technology Works
Nexalus’ system features several key innovations:
- Direct-to-chip microjet cooling: Uses precisely aimed liquid jets (like fire hoses) to target CPU/GPU hotspots
- Lower pressure operation: Enables more efficient cooling than channel-based systems
- Customizable configurations: Adapts to different chip architectures
- Sealed 1U rack units: Maintains standard data center footprints while integrating heat recovery
The coolant—primarily water with propylene glycol—circulates through a closed loop, capturing heat that would otherwise be wasted.
Turning Waste Heat into Revenue Streams
Nexalus’ system offers multiple advantages:
✅ 35% reduction in electricity consumption (compared to traditional cooling) ✅ Higher server density: More computing power per square foot ✅ Water conservation: Reduces reliance on evaporative cooling ✅ Heat monetization: Enables selling waste heat to:
- District heating systems
- Industrial facilities (food processing, manufacturing)
- Commercial buildings
“We’re unlocking trapped energy,” explains CEO Ken O’Mahony. “When buildings use our heat instead of electric heaters, we effectively free up grid capacity.”
Strategic Partnerships for Scalable Adoption
Nexalus is collaborating with industry leaders to accelerate deployment:
- Munters: Integrating with data center HVAC systems
- Dell & HPE: Ensuring drop-in compatibility with existing server architectures
The company envisions urban data centers feeding into district heating networks, while industrial-scale facilities could partner with manufacturers needing process heat.
The Future of Sustainable Data Centers
As Chief Science Officer Tony Robinson notes: “With this energy potential, it’s inevitable that we’ll see co-located systems with food production or carbon capture facilities.”
This innovation arrives at a critical moment—as AI-driven power demands threaten to overwhelm energy grids, Nexalus’ technology offers a path toward both efficiency gains and circular energy economics.
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