Chip Cooling via Adiabatic Expansion Manifold
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Solution Overview
Problem
Conventional heat sink systems for high-powered computer chips face inefficiencies, particularly with forced air systems that occupy significant volume and risk water leaks in liquid cooling systems, necessitating a more efficient and risk-free cooling method that reduces computer blade volume.
Innovation Solution
The system employs adiabatic expansion of high-pressure fluid through micro-apertures in a manifold to impinge on a heat-generating device, achieving high-speed fluid flow and efficient cooling without the need for bulky fans or toxic liquids, using a manifold with strategically arranged apertures and grooves to maximize expansion and velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If forced air cooling systems are used to cool high-powered computer chips, then cooling capability is provided, but the system occupies significant volume (0.3 to 0.5 of computer blade volume) and becomes increasingly difficult to apply as chip power density increases beyond 100+W/cm2
Solution Approach 1:
The patent applies pneumatic principles by using compressed gas (air or nitrogen) expanded through a manifold with multiple apertures to create high-velocity jets that impinge directly on the chip surface. This replaces conventional forced air cooling with a hydraulic-like fluid dynamic approach, achieving superior cooling density without requiring bulky fan assemblies. The compressed gas system occupies minimal volume while providing effective cooling for high power density chips.
Solution Approach 2:
The invention changes the pressure parameter of the cooling fluid from atmospheric to compressed (high pressure), then utilizes adiabatic expansion through the manifold apertures to convert pressure energy into kinetic energy. This parameter transformation creates high-velocity cooling jets that achieve intense heat removal with minimal fluid volume and without requiring large fan systems, thus reducing overall system volume while maintaining cooling effectiveness.
2Temperature
If liquid cooling systems are used to cool high-powered computer chips, then better cooling performance is achieved in high power density situations, but the risk of water leaks increases which can burn up the main processing chip and damage other components
Solution Approach 1:
The patent replaces the hazardous liquid coolant with compressed gas (air or nitrogen), which is inherently safer and cannot cause damage through leakage. While gas has lower heat capacity per unit volume, the high-velocity jet delivery mechanism compensates by achieving intense localized heat transfer. This substitution eliminates the reliability risk associated with liquid leaks while maintaining effective cooling performance.
3Speed
If conventional heat sinks with fans are used for cooling, then cooling is provided, but fans occupy significant volume and are not capable of providing fast enough air flow for efficient cooling at high power densities
Solution Approach 1:
The invention uses compressed gas expanded through a manifold with multiple small apertures to generate high-velocity jets. The pneumatic expansion converts stored pressure energy directly into kinetic energy, achieving much higher flow velocities than mechanical fans can produce. This eliminates the need for bulky fan assemblies while providing the high-speed fluid flow necessary for efficient cooling of high power density chips.
Solution Approach 2:
The cooling system segments the fluid delivery into multiple separate jets through the manifold apertures, distributing the cooling function across many small channels rather than relying on a single large fan. This segmentation allows the system to achieve high total flow velocity while occupying minimal volume, as each aperture generates its own high-speed jet that contributes to the overall cooling effect.
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 approach enables effective heat removal with a significant reduction in system volume, minimizing the risk of damage and enhancing cooling efficiency, allowing for high-power density applications while maintaining a compact design.
Implementation Method 1
Through adiabatic expansion cooling, a tremendous increase in volume and resultant extremely high velocity of the adiabatically cooled fluid is achieved
Implementation Method 2
The cooled fluid flows at extremely high velocity past a metal fin-equipped surface in contact with the chip
Data Source
AI summary
In one embodiment, the invention is a method and apparatus for chip cooling. One embodiment of an apparatus for cooling a heat-generating device includes an inlet for receiving a fluid, a manifold comprising a plurality of apertures formed therein for decreasing the pressure of the fluid from a first pressure by adiabatic expansion for impinging the fluid on the heat-generating device once the pressure of the fluid is decreased from the first pressure.