Air Cooling System for Electronics Rack with Segmented Flow
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Solution Overview
Problem
Conventional air cooling systems for electronics racks face limitations such as space constraints, reduced electronics volume, and incompatibility with high-power electronics and dense connectivity configurations, particularly in stacked single-shelf and full-rack systems.
Innovation Solution
An air cooling system with a front inlet area between shelves, featuring multiple fan assemblies and vents with baffles, which allows for efficient air flow distribution and circulation by splitting the air flow along a continuous backplane, optimizing cooling in high-power electronics racks with dense connectivity and limited vertical space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional stacked single-shelf systems are used with bottom-to-top air flow configuration, then cooling is provided to electronics shelves, but vertical space below and above each shelf is required for air intake and exhaust plenums, limiting space available for electronics
Solution Approach 1:
The air flow path is segmented into multiple independent channels: front-to-back air flow through each shelf, side-to-side air flow along the backplane, and vertical air flow through plenums. This segmentation allows each air flow path to be optimized independently and eliminates the need for large plenums, maximizing electronics volume while maintaining cooling performance
Solution Approach 2:
The patent introduces side-to-side air flow along the backplane as a new dimension of cooling, in addition to the conventional front-to-back and bottom-to-top flow paths. This multi-dimensional approach to air flow allows cooling without requiring additional vertical or front/back space, thereby maximizing the use of available rack space for electronics
2Temperature
If front-to-back air flow configuration stacked single-shelf systems are used, then cooling is provided to electronics shelves, but air intake area limits electronics module faceplate room and air exhaust area limits backplane availability for connectivity
Solution Approach 1:
The air flow system is segmented into multiple independent paths: front-to-back flow through each shelf, side-to-side flow along the backplane, and vertical flow through plenums. This segmentation allows cooling functions to be distributed throughout the rack structure, eliminating the need for large dedicated intake and exhaust areas at the front and back, thereby preserving connectivity space
Solution Approach 2:
The patent introduces side plenums and vertical plenums as intermediary structures that facilitate air flow without blocking front or back connectivity areas. These intermediary air flow paths allow cooling to occur through the sides and top/bottom of the rack, freeing up the front and back faces for dense connectivity
3Temperature
If side-to-side air flow configuration stacked single-shelf systems are used, then cooling is provided to electronics shelves, but air intake and exhaust areas are blocked by rack structure and air intake/exhaust volumes detract from available shelf volume for electronics
Solution Approach 1:
The air flow system is divided into multiple independent channels including front-to-back flow through shelves, side-to-side flow along the backplane, and vertical flow through plenums. This segmentation allows the rack structure to be optimized for electronics volume while maintaining cooling through distributed air flow paths that do not require large blocked intake/exhaust volumes
4Temperature
If bottom-to-top chimney air flow configuration full-rack systems are used, then cooling is provided to electronics racks, but preheating of air stream entering upper shelves limits power utilization in upper-shelf electronics
Solution Approach 1:
The air flow system is segmented into multiple independent paths: front-to-back flow through each shelf, side-to-side flow along the backplane, and vertical flow through plenums. This segmentation allows each shelf to be cooled independently through its own front-to-back air flow path, preventing heat from lower shelves from preheating air for upper shelves, thereby maximizing power utilization across all shelves
Solution Approach 2:
Each shelf is provided with its own dedicated front-to-back air flow path and cooling resources, creating locally optimized cooling conditions. This local quality approach ensures that each shelf operates independently thermally, preventing heat accumulation from affecting upper shelves and allowing maximum power utilization throughout the rack
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 enhances heat dissipation and power utilization in high-power electronics racks with continuous backplanes and dense connectivity, maximizing available space and electronics volume while maintaining efficient cooling performance.
Implementation Method 1
a lower fan assembly disposed substantially adjacent to the lower shelf opposite the middle shelf, and an upper fan assembly disposed substantially adjacent to the upper shelf opposite the middle shelf; wherein the front inlet area, the lower fan assembly, and the upper fan assembly are collectively operable for pulling the cooling air flow into the front of the electronics rack
Implementation Method 2
the front inlet area, the lower fan assembly, and the upper fan assembly are collectively operable for pulling the cooling air flow into the front of the electronics rack, through the middle shelf, and to a backplane of the electronics rack
Data Source
AI summary
The present invention provides an air cooling system for an electronics rack, including: a front inlet area disposed between a lower shelf of the electronics rack and an upper shelf of the electronics rack, substantially adjacent to a middle shelf of the electronics rack, wherein the front inlet area includes a lower front inlet area, a middle front inlet area, and an upper front inlet area; a lower fan assembly disposed substantially adjacent to the lower shelf; and an upper fan assembly disposed substantially adjacent to the upper shelf. The front inlet area, the lower fan assembly, and the upper fan assembly are collectively operable for pulling the cooling air flow into the front of the electronics rack, through the middle shelf, and into a backplane of the electronics rack. The front inlet area, the lower fan assembly, and the upper fan assembly are collectively operable for pulling the cooling air flow into the front of the electronics rack and through the lower shelf and the upper shelf.