Triangular Microchannel Heat Sink for SSD Cooling
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Solution Overview
Problem
The increasing demand for data storage in enterprise datacenters poses challenges in efficiently cooling solid-state drives (SSDs), as traditional air-cooling methods reach their limits due to the high heat generation from concentrated SSD use, and alternative cooling methods like immersion cooling and cold plates have limitations in thermal transfer efficiency and long-term reliability.
Innovation Solution
A microchannel heat sink is designed with opposed fluid flow paths and triangular microchannels fabricated using additive manufacturing, which increases the heat transfer coefficient while minimizing pressure drop, allowing for effective heat dissipation from SSDs with reduced pumping power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional air-cooling methods are used, then the cooling system is simple and cost-effective, but the cooling efficiency is insufficient due to high heat generation from concentrated SSD use
Solution Approach 1:
The patent changes the physical parameters of the cooling system by transitioning from air-cooling to liquid microchannel cooling, altering the coolant medium and heat transfer mechanism to achieve superior cooling efficiency for high-density SSD configurations
Solution Approach 2:
The patent employs liquid coolant flowing through microchannels to replace air-cooling convection, utilizing hydraulic flow to directly contact and extract heat from SSD components, thereby achieving the required cooling efficiency improvement
2Loss of energy
If immersion cooling is used, then cooling effectiveness is improved, but long-term reliability is compromised due to unknown effects of submerging electronic components in coolant
Solution Approach 1:
The patent segments the cooling approach by using localized microchannel heat sinks mounted directly on SSDs rather than complete immersion, allowing selective cooling of heat-generating components while keeping electronic components exposed to air, thus maintaining reliability while achieving effective cooling
Solution Approach 2:
The patent introduces microchannel heat sinks as intermediary structures between the SSD components and the coolant, enabling thermal transfer without direct coolant contact with sensitive electronic components, thereby preserving long-term reliability
3Loss of energy
If conventional cold plates are used, then cooling is provided, but thermal transfer efficiency is limited due to low heat transfer coefficient to pressure drop ratio
Solution Approach 1:
The patent transitions from conventional two-dimensional plate cooling to three-dimensional microchannel structures with triangular cross-sections, utilizing vertical stacking and multi-layer configurations to dramatically increase heat transfer surface area and efficiency while maintaining compact form factor
Solution Approach 2:
The patent employs triangular cross-section microchannels instead of conventional rectangular or circular channels, where the triangular geometry creates enhanced flow distribution and thermal contact with channel walls, improving heat transfer coefficient while reducing pressure drop
4Loss of energy
If microchannels are manufactured to desired specifications, then heat transfer efficiency is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent utilizes additive manufacturing technology to fabricate complex triangular microchannel geometries with precise dimensional control, achieving high heat transfer coefficients through optimized channel dimensions and configurations that would be difficult to manufacture using conventional machining methods
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 microchannel heat sink enhances heat transfer efficiency by up to 15-20% and reduces pressure drop, achieving a higher heat transfer coefficient to pressure drop ratio, thus improving cooling performance and operational capabilities of SSDs in datacenters.
Implementation Method 1
a thermally conductive base having a surface configured to lie adjacent the electronic device, the thermally conductive base configured to draw heat away from the electronic device
Implementation Method 2
first and second microchannels connected between the first inlet fitting and the first outlet fitting, the first microchannel spaced a first distance from the surface of the thermally conductive base
Data Source
AI summary
A heat sink for use in drawing heat away from electronic devices such as solid state drives (SSDs) includes microchannels formed along its length. The microchannels may have a triangular cross-section and may be formed by additive manufacturing. Two pairs of microchannels are provided, with coolant fluid running in a first direction through the first pair, and in a second opposite direction in the second pair to minimize thermal gradients along the length of the SSD and heat sink. The walls of the microchannel may be formed with a roughness that provides turbulent flow through the microchannels. The turbulent flow together with the large surface area of the three sides of the triangular microchannels increases the heat transfer coefficient of the microchannels, while the triangular shape and pumping fluid through a pair of microchannels reduces pressure drop along the microchannels.