What is Single-phase immersion cooling?
Single-phase immersion lowers adapted servers into dielectric fluid that remains liquid. Component heat enters the bath, then pumped or natural circulation carries it to a heat exchanger and facility-water loop. Server fans are usually removed or disabled, so nearly all submerged-component heat can follow the liquid path. The architecture fits dense, repeatable compute fleets and sites willing to change hardware and service practices. It is less natural for mixed equipment, frequent component swaps, batteries, spinning drives, or optical and network devices that are not approved for the fluid. The facility needs strong floors, tank power and water connections, fluid storage and filtration, spill containment, lifting gear, work space, dry network and power arrangements, and a plan for fire and environmental review. Thermal capacity depends on bath temperature, facility-water temperature, flow, heat-exchanger duty, and the approved hardware layout. Ask for compatibility down to labels, plastics, cables, connectors, thermal materials, and warranties. Observe how staff lift, drain, transport, repair, and return a server without contaminating the bath. Procurement should define fluid testing, make-up volume, disposal, pump and control redundancy, leak response, and service access. Compare usable compute density and operations cost, not only tank kilowatts or claimed cooling efficiency.