Direct Liquid Cooling delivers coolant through tubes or channels connected directly to heat-generating components such as CPUs, GPUs, and memory modules. This method eliminates air gaps between cooling surfaces and processors, achieving thermal transfer efficiency 10 to 20 times greater than traditional air cooling. Direct Liquid Cooling supports processors generating 300+ watts of heat continuously.
Technical Configuration
Systems use either single-phase liquids like water and glycol mixtures or two-phase refrigerants. Coolant inlet temperatures typically range from 40-50°F for single-phase systems. Manifolds and microchannels integrated into server designs distribute fluid directly across high-heat-density areas. Pressure requirements usually stay below 20 psi to prevent component damage, with flow rates of 2-10 gallons per minute per server.
Data Center Integration
Direct Liquid Cooling enables 400+ kW per rack deployments in AI and high-performance computing facilities. Companies like Google and Microsoft have deployed this technology at scale to support advanced machine learning infrastructure. The approach reduces facility cooling costs and enables longer processor lifespans under intensive workloads, making it essential for next-generation data center architecture.