Liquid-Cooled Server Node Service via Pressure Relief

The liquid cooling system is segmented into multiple independent cooling zones, each equipped with its own liquid distribution manifold and flow control mechanisms. This allows different regions of the rack (primary components, auxiliary components, secondary equipment) to be cooled independently with appropriate liquid flow rates, thereby achieving both high cooling efficiency for primary components and adequate coverage for auxiliary components simultaneously.

Before node insertion or removal operations, the system performs preliminary actions including activating service mode, opening pressure relief valves to reduce hydraulic pressure in the affected cooling zones, and adjusting flow control valves. These preliminary pressure reduction actions are automatically executed by the controller before the physical node servicing begins, thereby facilitating easy node insertion/removal while avoiding significant hydraulic pressure that would otherwise complicate or endanger the operation.

The liquid cooling system dynamically adjusts flow rates based on operational mode. During service mode, the system implements a dual-flow strategy: reduced flow through nodes being serviced (to minimize pressure and allow easy insertion/removal) and enhanced flow through alternative cooling paths and heat exchangers (to maintain overall temperature control). The controller continuously monitors temperature sensors and dynamically reallocates liquid flow resources, thereby achieving both easy node servicing and adequate temperature maintenance without excessive energy consumption.

The liquid cooling system is designed with universal multi-functionality to serve multiple component types simultaneously. A single integrated liquid distribution network provides cooling to primary components (CPUs, GPUs) through cold plates, auxiliary components (storage devices, network switches) through dedicated cooling channels, and critical secondary equipment through alternative cooling paths. The system uses universal liquid coolant distribution with zone-specific flow control, thereby achieving high heat removal efficiency for primary components while simultaneously providing adequate cooling coverage for auxiliary components and critical secondary equipment that were previously uncovered.