Quantum Mesh Secures Patent for “KAMUI” Immersion Cooling System: Japan’s First Commercial Solution Achieving a World-Class PUE of 1.03 via Groundwater Utilization

Quantum Mesh Inc. (Headquarters: Chuo-ku, Tokyo; Representative Director: Hiroyuki Shinohara; hereinafter "Quantum Mesh") announces that it has obtained a patent from the Japan Patent Office regarding the cooling technology utilized in its self-developed single-phase liquid immersion cooling system, "KAMUI."

"KAMUI" is Japan's first commercially available single-phase liquid immersion cooling system. By utilizing groundwater as a cooling source, the system achieves a world-class PUE (Power Usage Effectiveness) of 1.03–1.04, delivering significant energy savings and space efficiency in data centers.

■Patent Features

• High-Efficiency Heat Exchange Utilizing Groundwater
  The system utilizes abundant groundwater (14–18°C throughout the year) as a cooling source, realizing an environmentally friendly solution with minimal environmental impact.
• World-Class Energy Efficiency (PUE 1.03–1.04)
  Adopting single-phase liquid immersion cooling reduces cooling power consumption by more than 90% compared to conventional air-cooled data centers, achieving an overall data center PUE of 1.03–1.04 .
• Cooling Capacity of 40 kVA in Less Than 1 m²
  The system accommodates high-density GPU servers, achieving a cooling capacity of up to 40 kVA in a footprint of less than 1 ㎡ per rack. This reduces physical space requirements by approximately 80% compared to traditional data centers.

■About KAMUI

"KAMUI" is a closed-loop, single-phase liquid immersion cooling system independently developed by Quantum Mesh. The system works by immersing servers directly into a coolant, allowing for highly efficient absorption of the heat generated by the equipment. It functions by exchanging heat between the coolant, which is warmed by the servers, and groundwater, which maintains a stable temperature of 14–18°C throughout the year. The electricity required for cooling is reduced to less than one-tenth of that of conventional air-cooling systems, enabling the data center to achieve a world-class PUE of 1.03–1.04. Additionally, the system can cool up to 40 kVA in a rack with a footprint of approximately 1 ㎡, reducing spatial requirements by about 80% compared to traditional data centers.