Bubble-Assisted Immersion Tank for Low-Power Server Cooling

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Solution Overview

Problem

Existing immersion cooling systems for high-performance servers face high fluid resistance due to high-density server installations and high-viscosity liquids, necessitating high-lift motors and increased power consumption, which is detrimental to Power Usage Effectiveness (PUE).

Innovation Solution

A bubbling-assisted immersion tank system that uses a bubbling-assisted module to introduce auxiliary bubbles into the cooling liquid, enhancing circulation and reducing motor workload and power consumption by improving flow speed and circulation rate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If high-density server installations and high-viscosity insulating liquid are used for cooling, then cooling performance is improved, but fluid resistance increases and motor power consumption increases

Engineering Contradiction:

Improvecooling performanceVSAvoidmotor power consumption

Core Design Contradiction:

TemperatureVSUse of energy by moving object

Solution Approach 1:

The patent introduces a bubbling-assisted module that generates gas bubbles and injects them into the insulating liquid to create artificial convection currents. The bubbles rise through the liquid, dragging surrounding fluid upward and creating circulation patterns that enhance heat transfer from servers to the liquid, reducing reliance on high-power motors for fluid circulation.

Inventive Principle:

Principle #29Pneumatics and hydraulics

Solution Approach 2:

The patent changes the physical state of the cooling medium by introducing gas bubbles into the liquid, transforming it into a two-phase flow system. This parameter change (from single-phase liquid to two-phase liquid-gas mixture) fundamentally alters the heat transfer mechanism, enabling more efficient cooling with reduced motor workload.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If high-lift motors are used to maintain circulation of large amounts of insulating liquid, then servers operate at safe temperatures continuously, but Power Usage Effectiveness deteriorates

Engineering Contradiction:

Improvecontinuous operation at safe temperaturesVSAvoidPower Usage Effectiveness

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The bubbling-assisted module creates self-sustaining convection currents where heated liquid naturally rises and cooler liquid sinks, forming continuous circulation loops without requiring high-lift motors. The system uses the heat from servers themselves to drive the circulation through bubble-induced convection, reducing external energy input while maintaining reliable cooling.

Inventive Principle:

Principle #25Self-service

3Temperature

If high-viscosity insulating liquid is used for immersion cooling, then heat transfer from components to liquid is improved, but fluid resistance and motor workload increase significantly

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidfluid resistance

Core Design Contradiction:

TemperatureVSForce

Solution Approach 1:

The patent uses gas injection to create bubbles that rise through the high-viscosity liquid, generating upward flow forces that overcome the liquid's resistance. The bubbles act as mechanical drivers, creating circulation patterns that enable efficient heat transfer without requiring motors to overcome the full viscous drag of the liquid.

Inventive Principle:

Principle #29Pneumatics and hydraulics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system enhances cooling efficiency, reduces power consumption, and improves Power Usage Effectiveness by stabilizing cooling performance and extending the service life of high-performance servers.

Implementation Method 1

The bubbling-assisted module is configured to transport a plurality of auxiliary bubbles into the cooling liquid so that the auxiliary bubbles are discharged from a top of the accommodation space through an object to be cooled

Methodology Applied

Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

allowing heat from the components to be directly transferred to the liquid

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

The heated insulating liquid is then circulated back to the tank through natural convection with the aid of a motor and a heat exchanger

Methodology Applied

Scientific EffectNatural convection: Free Convection

Data Source

PatentUS20260040483A1Immersion cooling system and bubbling-assisted immersion tank

Publication Date: 2026.02.05 WISTRON NEWEB CORP

AI summary

The immersion cooling system includes a bubbling-assisted immersion tank and a coolant distribution device. The bubbling-assisted immersion tank includes a tank body and a bubbling assisted-module. The tank body includes an accommodation space provided with a cooling liquid. The bubbling-assisted module is disposed at a bottom of the accommodating space and is configured to transport a plurality of auxiliary bubbles into the cooling liquid so that the auxiliary bubbles are discharged from a top of the accommodating space through an object to be cooled. The coolant distribution device is connected to the tank body and is configured to introduce and discharge the cooling liquid from the accommodation space. Thus, the cooling efficiency of the immersion cooling system can be improved.