Immersion Cooling Fluid With Boron Nitride for Passive Heat Transfer

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Solution Overview

Problem

Conventional cooling systems relying on forced convection are inefficient in energy utilization and prone to failure when the convection mechanism is unfunctional, leading to system shutdown and potential damage.

Innovation Solution

An immersion cooling system using a working fluid composed of a non-conductive coolant and modified boron nitride microparticles with organic functional groups, which enhances thermal conductivity through passive and forced convection modes, ensuring stable heat transfer even in stationary conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If forced convection mechanism is used to transfer waste heat, then heat transfer capability is sufficient, but energy utilization is inefficient and system reliability is reduced

Engineering Contradiction:

Improvesystem reliabilityVSAvoidenergy utilization

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The working fluid performs self-service by utilizing its own thermal energy and density differences to drive passive convection currents. The heated fluid naturally rises and cools at the surface, creating a self-sustaining circulation pattern without requiring external mechanical intervention, thereby eliminating energy consumption by fans while maintaining system reliability.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the mechanical forced convection system (fans, pumps) with a passive convection system that uses natural thermal-driven fluid motion. The working fluid's thermal expansion and density variations automatically drive heat transfer through buoyancy forces, substituting mechanical components with a purely thermal-hydrodynamic process that is both energy-efficient and reliable.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If forced convection mechanism is used, then heat transfer capability is sufficient, but system complexity increases

Engineering Contradiction:

Improveoperational stabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and removes the forced convection mechanism (fans, motors, control systems) from the cooling system, retaining only the essential passive convection process. By taking out the complex mechanical components, the system achieves operational stability through simple natural convection while significantly reducing device complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The working fluid serves multiple functions simultaneously: it acts as both the cooling medium and the convection driver. The fluid's thermal properties enable both heat absorption from the heated component and natural circulation through density-driven convection, eliminating the need for separate mechanical driving systems and reducing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If conventional working fluid is used, then system operation is simple, but heat transfer efficiency is insufficient

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidsystem operation simplicity

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent employs a composite working fluid formulation that combines base fluid with specialized additives to enhance thermal conductivity and convection efficiency. This composite fluid maintains ease of operation while significantly improving heat dissipation efficiency through its enhanced thermal properties and optimized flow characteristics.

Inventive Principle:

Principle #40Composite materials

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 achieves a 50% to 65% improvement in heat dissipation efficiency and maintains thermal stability with uniform dispersion of microparticles, reducing the risk of precipitation and enhancing operational reliability.

Implementation Method 1

a lattice vibration effect of the modified boron nitride microparticles dissolved in the working fluid, enhances the thermal conductivity of the working fluid

Methodology Applied

Scientific EffectLattice vibration: Vibration

Implementation Method 2

the working fluid transfers the waste heat through the forced convection during the heat transfer operation

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS20260022286A1Immersion cooling system and working fluid thereof

Publication Date: 2026.01.22 TAIWAN RUOMEI TECH CORP

AI summary

An immersion cooling system, including: an enclosure, the enclosure including an inner space; a heating part, disposed in the inner space; and a working fluid, filled in the inner space and having thermal contact with the heating part, to transfer the waste heat from the heating part into the outside of the enclosure. The composition of the working fluid includes: a non-conductive coolant and a plurality of modified boron nitride microparticles. The non-conductive coolant and the modified boron nitride microparticles are mutually dissolved in the working fluid, and a molecular structure of the modified boron nitride microparticles includes organic functional groups.