Passive Thermal Transport Network for Fanless Power Supplies
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Solution Overview
Problem
Power supplies in data centers face frequent failures due to reliance on active cooling systems, such as fans and pumps, which are costly, power-intensive, prone to breakdown, and introduce dust and noise, leading to high maintenance and replacement costs.
Innovation Solution
A passive heat dissipation system using a thermally conductive shell with an inner layer of high thermal conductivity and an outer layer optimized for radiation, featuring heat guides that distribute heat from generating devices to remote areas of the shell for efficient dissipation across a large surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a fan is used for cooling, then heat dissipation is effective, but the power supply becomes vulnerable to mechanical breakdown and failure
Solution Approach 1:
The patent replaces the mechanical fan system with a passive thermal management system consisting of a thermally conductive housing that conducts heat away from components. This eliminates moving parts and mechanical failure modes while maintaining effective heat dissipation through thermal conduction along the housing structure.
Solution Approach 2:
The housing itself serves as the heat dissipation mechanism rather than requiring a separate active cooling component. The thermally conductive housing passively conducts heat from internal components to its external surfaces, where it can be dissipated to the environment, making the structure self-serving for both structural and thermal management functions.
2Temperature
If a fan is used for cooling, then heat dissipation is effective, but additional power is consumed to spin the fan
Solution Approach 1:
The patent eliminates the electrical motor and fan blades by using the housing's thermal conductivity to passively conduct heat away from components. This removes the power-consuming mechanical cooling system entirely, achieving heat dissipation without additional electrical power input beyond what is already consumed by the power supply's operation.
Solution Approach 2:
The thermal management function is performed automatically by the housing's inherent thermal properties without requiring external power input. The heat naturally conducts through the housing structure to areas of lower temperature, eliminating the need for powered cooling mechanisms.
3Temperature
If a fan is used for cooling, then heat dissipation is effective, but dust and moisture are drawn into the power supply
Solution Approach 1:
By replacing the fan with a passive thermal conduction system, the patent eliminates the air intake mechanism that draws dust and moisture into the enclosure. Heat is dissipated through the housing walls without requiring air flow across the components, thereby preventing contaminant ingress.
Solution Approach 2:
The patent extracts the air intake function from the cooling system, allowing heat dissipation to occur through the housing structure without creating air currents that would draw in harmful particles and moisture from the environment.
4Temperature
If a fan is used for cooling, then heat dissipation is effective, but noise is generated
Solution Approach 1:
The patent eliminates the noise-generating fan and motor by using passive thermal conduction through the housing. Without moving parts or air movement, the system operates silently while still effectively dissipating heat from the power supply components.
5Object-affected harmful factors
If a liquid cooling system is used, then dust problems are avoided, but the system becomes vulnerable to breakdown and leakage
Solution Approach 1:
The patent replaces the liquid cooling system with a passive air-cooled thermal conduction approach. The housing conducts heat away from components and allows natural convection at the housing surfaces, eliminating pumps, coolant channels, and seals that are prone to leakage and mechanical failure.
Solution Approach 2:
The housing performs both structural and thermal management functions passively without requiring liquid coolant circulation. Heat is conducted through the housing walls and dissipated to the environment through natural convection and radiation, eliminating the complexity and failure modes of liquid cooling systems.
6Temperature
If active cooling systems are used, then heat dissipation is effective, but the power supply lifetime is reduced
Solution Approach 1:
By eliminating the mechanical cooling system and using passive thermal conduction through the housing, the patent removes the primary failure point that limited power supply lifetime. The passive system has no moving parts to wear or fail, allowing the power supply to operate reliably for extended periods.
Solution Approach 2:
The housing's inherent thermal conductivity provides continuous passive heat dissipation without requiring active cooling components that can fail. This reliable, maintenance-free thermal management system enables the power supply to achieve its full operational lifetime potential.
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
This solution extends the lifetime of power supplies by effectively dissipating heat without mechanical failures, reducing noise, and lowering operational costs by eliminating the need for active cooling systems, thus maintaining components within safe temperature ranges.
Implementation Method 1
The shell is made from a thermally conductive material and has an inner surface and an outer surface. The one or more heat guides are coupled to the inner surface of the shell. During operation of the power supply, the heat guides transport heat from the power-handling components to the shell.
Implementation Method 2
uses the large exterior area of the heat dissipation shell for dissipating heat, for example by radiation and/or conduction
Implementation Method 3
The one or more heat guides transport heat along a component-density gradient from a proximal zone of the shell to a distal zone of the shell
Data Source
AI summary
A power supply for providing power to a power consumer includes comprising power-handling circuitry disposed in a housing that comprises a shell and a heat guide. The shell has an outer surface and an inner surface. The inner surface has a heat guide disposed therein. The heat guide has a higher thermal conductivity than that of the outer surface. The shell passively dissipates heat generated by the power-handling circuitry at a rate sufficient to maintain the power-handling circuitry at an operating temperature.