Multi-stage Cooling System for Server Rack Heat Management
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Solution Overview
Problem
Existing data center cooling systems are inefficient in managing non-uniform waste heat generation across server racks due to varying component densities and workload changes, leading to ineffective air cooling distribution.
Innovation Solution
A multi-stage cooling system with rack-level, chassis-level, and server-level air moving devices controlled by sensors and controllers to dynamically adjust airflow based on thermal characteristics, ensuring targeted cooling for each server and maintaining optimal temperatures across the rack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform heat removal methods are applied to non-uniform waste heat generation sources, then the cooling system is simple to implement, but the waste heat removal efficiency is insufficient
Solution Approach 1:
The cooling system is divided into multiple independent cooling channels, each equipped with its own air moving device and control system. This segmentation allows different sections of the rack to receive customized cooling based on their specific heat generation characteristics, thereby improving waste heat removal efficiency without significantly complicating the overall system implementation.
Solution Approach 2:
The patent implements localized cooling by providing different cooling intensities and characteristics to different sections of the rack based on their specific heat generation needs. Each cooling channel can be independently adjusted to match the thermal characteristics of its corresponding server section, optimizing heat removal efficiency while maintaining reasonable system complexity.
2Device complexity
If rack-level air moving devices are used for entire rack cooling, then the cooling system structure is simple, but the air cooling distribution is ineffective
Solution Approach 1:
The single rack-level air moving device is segmented into multiple section-level air moving devices, each responsible for a specific cooling channel. This segmentation improves air cooling distribution effectiveness by directing cooled air precisely to where it is needed, while the modular structure keeps the system complexity manageable.
Solution Approach 2:
The patent introduces intermediate control elements (section-level controllers and sensors) between the central control system and the air moving devices. These intermediaries enable precise local control of air distribution, improving cooling effectiveness while maintaining a hierarchical system structure that doesn't overly complicate implementation.
3Reliability
If cooling is activated throughout the entire rack, then all sections are covered, but energy consumption increases
Solution Approach 1:
The cooling system transitions from a static, uniform cooling approach to a dynamic, adaptive system. Each cooling channel can independently adjust its air moving device operation based on real-time thermal conditions detected by sensors, ensuring adequate cooling coverage while minimizing energy consumption by activating cooling only where and when needed.
Solution Approach 2:
The system dynamically changes operational parameters (air flow rate, cooling intensity) of each cooling channel based on detected thermal conditions. This allows the system to maintain adequate cooling coverage across all sections while optimizing energy consumption by adjusting parameters according to actual heat generation levels in each section.
4Productivity
If section-level air moving devices are implemented, then targeted cooling is achieved, but the device complexity increases
Solution Approach 1:
The air moving system is segmented into independent module units, each handling a specific cooling channel. This segmentation enables targeted cooling for improved heat removal efficiency while keeping each module relatively simple in design, making the overall system complexity manageable through modularity.
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 waste heat removal efficiency by providing tailored cooling to different sections of the rack, maintaining optimal temperatures and reducing energy consumption by activating cooling only where needed.
Implementation Method 1
a rack-level air moving device that moves air through the rack, one or more server-level air-moving devices that move air through one or more of the servers
Data Source
AI summary
A multi-stage air moving system for cooling servers in a rack includes a rack-level air moving device that moves air through the rack, one or more server-level air-moving devices that move air through one or more of the servers, one or more sensors, and an air flow control system. The sensors sense characteristics of air in the rack. The air flow control system includes one or more controllers. The one or more controllers control the rack-level air-moving device and the server-level air moving devices in response to one or more sensed characteristics.