Volume Compensator Mitigates Pressure Buildup in Liquid Cooling Loops

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Solution Overview

Problem

In liquid cooling systems for IT components, accidental closed loops can form when secondary coolant inlet and outlet are disconnected, leading to pressure buildup and potential connector failure, leaks, and damage.

Innovation Solution

A volume compensator connected to a port of the heat exchanger, which increases or decreases in size with pressure, is used to mitigate pressure buildup in accidental closed loops.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If quick disconnect couplings are used for secondary coolant ports, then ease of operation is improved, but reliability deteriorates due to accidental closed loops forming when disconnected

Engineering Contradiction:

Improveease of connection and disconnectionVSAvoidrisk of pressure buildup and connector failure

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

A volume compensator is connected to the heat exchanger to provide beforehand cushioning against pressure buildup. The volume compensator includes a bladder that can expand to accommodate thermal expansion of coolant and absorb pressure spikes before they reach the connectors, thus protecting the system from damage while maintaining quick disconnect capability

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The volume compensator acts as an intermediary element between the heat exchanger and the coolant system. It mediates pressure fluctuations and thermal expansion effects, isolating the connectors from harmful pressure spikes that occur when accidental closed loops form during disconnection

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If secondary coolant loops are made disconnectable, then adaptability is improved, but harmful factors increase due to potential leaks and damage

Engineering Contradiction:

Improveflexibility of coolant loop configurationVSAvoidconnector failure and leaks

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The volume compensator provides beforehand cushioning by maintaining a pre-charged pressure in the bladder that counteracts pressure buildup from thermal expansion. This protective measure is in place before any disconnection event occurs, preventing leaks and damage while allowing flexible reconfiguration of coolant loops

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The system converts the potentially harmful effect of thermal expansion and pressure buildup into a beneficial feature. The volume compensator uses the thermal expansion of coolant to activate the bladder, which then absorbs excess pressure and prevents damage, turning a harmful phenomenon into a protective mechanism

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 volume compensator effectively reduces pressure in accidental closed loops, preventing connector failure and other damage, and ensuring safe reconnection of coolant loops.

Implementation Method 1

A volume compensator (or pressure regulator) is connected to one port of a heat exchanger... The volume compensator has an internal volume that increases or decreases in size depending on pressure

Methodology Applied

Scientific EffectPressure-induced volume change: Elasticity

Data Source

PatentUS20250176131A1Two-stage cooling of heat generating components

Publication Date: 2025.05.29 ICEOTOPE

AI summary

A module, used in cooling one or more heat generating components, comprises: a heat exchanger, having a plurality of ports for flow of a primary coolant carrying heat from the one or more heat generating components and for flow of a secondary coolant, the heat exchanger being configured to transfer heat from the primary coolant to the secondary coolant; and a volume compensator, fluidly coupled to the heat exchanger via one of the plurality of ports. The volume compensator has an internal volume configured to increase or decrease in size depending on pressure. A cooled electronics system comprising one more such modules is also provided.