Rack Cooling System with Shared Fan Array
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Solution Overview
Problem
Current computing systems in data centers face inefficiencies in cooling due to the use of numerous small fans, which lead to surplus cooling in some servers and inadequate cooling in others, resulting in wasted energy and reduced performance.
Innovation Solution
Implementing a rack cooling system with a plurality of shared fans arranged in an array and a fan controller that generates control signals based on thermal conditions across different servers, allowing individual groups of fans to operate at different speeds to provide targeted airflow according to the thermal needs of each server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rack-level fans are controlled based on rack-level inputs without regard to temperature variations between computing devices, then the cooling system operates uniformly across all devices, but this leads to surplus cooling for devices operating at lower temperatures and inadequate cooling for devices operating at higher temperatures
Solution Approach 1:
The patent implements per-device temperature monitoring and control, where each computing device's thermal conditions are measured independently and used to control the rack-level fans. This allows different regions of the rack (different device positions) to receive differentiated cooling based on their actual thermal needs, rather than uniform cooling. The controller adjusts fan operation based on local temperature conditions at each device, resolving the contradiction between providing adequate cooling to hot devices and avoiding energy waste on already-cool devices.
Solution Approach 2:
The patent employs dynamic control of rack-level fans based on real-time temperature feedback from multiple computing devices. The fan speed and operation are continuously adjusted according to the thermal conditions detected by temperature sensors positioned at different device locations. This dynamic adjustment allows the cooling system to adapt to varying thermal loads and temperature distributions within the rack, ensuring adequate cooling when needed while reducing energy consumption when thermal demands are lower.
2Reliability
If multiple small fans are mounted in individual computing systems, then each device can cool itself, but this leads to inefficiencies because the computing systems include a large number of relatively small fans that are inefficient when compared to larger fans
Solution Approach 1:
The patent consolidates cooling functionality from individual device fans into shared rack-level fans that serve multiple computing devices. Instead of each device having its own small inefficient fan, larger rack-level fans are positioned to provide cooling airflow to multiple devices simultaneously. This merging approach improves cooling effectiveness through larger, more efficient fans while reducing the total number of fans and overall energy consumption in the rack.
Solution Approach 2:
The rack-level fans are designed to serve multiple computing devices with different thermal requirements, making the cooling system multi-functional. The fans can be controlled to provide cooling to various devices based on their individual thermal needs, as determined by temperature sensors and the controller. This universal cooling approach replaces multiple specialized small fans with fewer versatile larger fans, improving efficiency while maintaining adequate cooling for all devices.
3Power
If rack-level fans are used to cool computer systems mounted in the racks, then cooling capacity is improved, but control arrangements may not allow different ones of the rack-level fans to operate at different speeds, leading to inefficiencies
Solution Approach 1:
The patent implements a feedback-based control system where temperature sensors monitor thermal conditions at different computing device locations, and the controller uses this feedback to adjust rack-level fan speeds. The controller receives temperature inputs from multiple devices and dynamically adjusts the speed of different rack-level fans to match the actual cooling demands. This feedback mechanism enables differentiated fan speed control without excessive system complexity, as the controller automatically processes temperature data and generates appropriate control signals.
Solution Approach 2:
The patent enables dynamic speed control of rack-level fans based on real-time thermal conditions. Different rack-level fans can operate at different speeds, and fan speeds can change over time according to varying temperature demands. This dynamic control capability allows the system to optimize cooling performance for each device position while managing control complexity through automated temperature-based adjustments rather than fixed-speed operation.
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 enhances cooling efficiency by ensuring adequate cooling for servers with high thermal loads while minimizing energy consumption by reducing surplus airflow, thereby optimizing energy use and performance.
Implementation Method 1
The two or more groups of one or more shared fans are configured to induce air flow through the two or more different groups of one or more electronic devices mounted in the rack
Implementation Method 2
remove thermal energy from the electronic devices mounted in the rack
Data Source
AI summary
A rack cooling system includes a plurality of electronic devices mounted in a rack and a plurality of shared rack-level fans arranged in an array and coupled to a rack. A fan controller receives one or more condition signals indicating thermal conditions in the electronic devices and generates a plurality of control signals for controlling the shared rack-level fans. The fan controller generates the plurality of control signals based on respective thermal conditions in respective electronic devices in respective positions in the rack and the plurality of control signals causes different respective groups of one or more shared rack-level fans in different locations in the array to induce air flow through the electronic devices, wherein separate ones of the two or more groups of one or more shared rack-level fans operate at different speeds or angles.