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Design, Fabrication and Operation of a 1.2kW Open Bath Immersion Cooled Server Demo
Keywords: immersion, cooling, evaporative
Several recent publications have touted the power density, energy efficiency and simplicity merits of a new approach to passive 2-phase immersion cooling of computer equipment called open bath immersion or OBI. Design principles of OBI include the elimination of duplicitous cooling hardware, elimination of hermetic electrical connectors through atmospheric pressure operation and use of diffusion sealing and hot-swappability. These principles are elucidated by reviewing the design, fabrication and operation of a 1200W demonstration system that represents a small section of what might be the modular unit for large scale implementation in a datacenter. The demo includes most of the essential subsystems for one vision of OBI including: tank, boiling enhancement, primary condenser, moisture and organic filtration, IO/power conduit, vent and pressure control, hot swap system, and logic control.
Philllip Tuma, Advanced Application Development Specialist
3M Company
St. Paul, MN

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