Liquid-Cooled Server Flow Channel With Curved Bend Flow Guidance

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Solution Overview

Problem

Conventional liquid cooling systems fail to achieve temperature uniformity across chips due to poor flow velocity consistency, leading to inefficient heat dissipation and potential device malfunctions.

Innovation Solution

A medium flow channel with sequentially bent sub-sections and connecting sections, incorporating convex curved panels as flow guiding structures to ensure smooth medium flow and consistent temperature distribution, using heat dissipation fins to divide the channel into sub-sections and maintain gaps for turbulence reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional liquid cooling schemes are used with heat dissipation fins in flow channels, then heat dissipation from chips is improved, but temperature uniformity across chips deteriorates

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidtemperature uniformity

Core Design Contradiction:

Loss of energyVSTemperature

Solution Approach 1:

The patent introduces convex curved panels in connecting sections that guide the liquid flow smoothly around bends. The curved surfaces create centrifugal force that pushes the liquid flow toward the outer wall of the bend, preventing flow separation and dead zones. This ensures uniform temperature distribution across all chips by maintaining consistent flow velocity throughout the channel width.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The patent applies different structural characteristics to different sections of the flow channel. Heat dissipation fins are added in straight sections to enhance heat transfer, while convex curved panels are placed in connecting sections to manage flow dynamics. This localized optimization allows each section to perform its specific function effectively, achieving both high heat dissipation and uniform temperature distribution.

Inventive Principle:

Principle #3Local quality

2Loss of energy

If heat dissipation fins are added in flow channels to improve heat dissipation, then heat transfer efficiency is enhanced, but flow velocity consistency across the channel width deteriorates

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidflow velocity consistency

Core Design Contradiction:

Loss of energyVSSpeed

Solution Approach 1:

The convex curved panels create a flow guiding effect that maintains velocity consistency. The curved geometry generates centrifugal force that redistributes the liquid flow evenly across the channel width, preventing velocity stratification that would otherwise occur in sharp bends. This ensures that all regions of the channel, including those with heat dissipation fins, receive uniform flow velocity for optimal heat transfer.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Device complexity

If conventional flow channels are used, then device complexity is low, but temperature consistency across chips at various locations deteriorates

Engineering Contradiction:

Improveflow channel structure complexityVSAvoidtemperature consistency

Core Design Contradiction:

Device complexityVSTemperature

Solution Approach 1:

The flow channel is segmented into straight sections and connecting sections, with different functional elements applied to each. Heat dissipation fins are placed in straight sections for enhanced heat transfer, while convex curved panels are installed in connecting sections for flow guidance. This segmentation allows the system to achieve uniform temperature consistency through targeted local modifications rather than redesigning the entire channel structure.

Inventive Principle:

Principle #1Segmentation

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

Enhances temperature consistency and flow velocity uniformity, improving heat dissipation efficiency and extending the operational lifespan of liquid-cooled servers.

Implementation Method 1

each of the connecting sections is provided with a flow guiding structure, the flow guiding structure including a convex curved panel, wherein the convex curved panel protrudes towards an outer wall of a flow channel of the connecting section where the convex curved panel is disposed, and two opposing convex curved surfaces of the convex curved panel are arranged in parallel and respectively form flow guide surfaces

Methodology Applied

Scientific EffectFlow guidance through convex curved surfaces:

Implementation Method 2

a plurality of heat dissipation fins are juxtaposed in each of the sub-sections, each of the heat dissipation fins extending along an extension direction of the sub-section in which the heat dissipation fins are disposed and dividing the sub-section into a plurality of juxtaposed sub-flow channels

Methodology Applied

Scientific EffectHeat transfer through conduction and convection: Conduction (thermal)

Implementation Method 3

a plurality of heat dissipation fins are juxtaposed in each of the sub-sections... dividing the sub-section into a plurality of juxtaposed sub-flow channels

Methodology Applied

Scientific EffectForced convection: Forced Convection

Data Source

PatentUS20250386419A1Medium flow channel, flow channel plate, liquid-cooled server, and data center

Publication Date: 2025.12.18 BITDEER SEMICONDUCTOR TECHNOLOGY PTE LTD

AI summary

Disclosed are a medium flow channel, a flow channel plate, a liquid-cooled server, and a data center. The medium flow channel includes: at least two sub-sections sequentially bent and connected, and connecting sections connecting adjacent sub-sections; wherein a plurality of heat dissipation fins are juxtaposed in each of the sub-sections, each of the heat dissipation fins extending along an extension direction of the sub-section in which the heat dissipation fins are disposed and dividing the sub-section into a plurality of juxtaposed sub-flow channels.