Pluggable Datacenter Cooling Loop With Intermediary Heat Exchange
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Solution Overview
Problem
Existing datacenter cooling systems, particularly air cooling, are inefficient for high-density servers, and liquid cooling systems pose risks of electrical shorting and flooding, lacking universality and complicating design, serviceability, and reliability.
Innovation Solution
A universal integrated pluggable mezzanine module with a flexible tubing system and snap-in connections for a universal coolant, integrating an additional cooling loop with a heat exchanger to transfer heat to a primary cooling loop via a cooling distribution unit, eliminating the need for system-specific wetted materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If liquid cooling systems are used to draw heat away from server components, then cooling efficiency is improved, but the risk of electrical shorting and flooding increases
Solution Approach 1:
The patent introduces an intermediary cooling loop with dielectric fluid that transfers heat from the server components indirectly. The first cooling loop uses dielectric fluid to cool components, the second loop uses water to cool the first loop via heat exchangers, and the third loop uses chilled water from a CDU to cool the second loop. This multi-layered intermediary system maintains high cooling efficiency while eliminating direct water contact with electrical components, thus preventing electrical shorting and flooding risks.
2Loss of energy
If system-specific wetted materials are used for different cooling systems, then cooling performance is optimized, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent implements a universal cooling system where the same dielectric fluid is used across all server trays and rack units regardless of specific cooling requirements. The system can accommodate different server densities and cooling needs through adjustable flow rates and heat exchanger configurations rather than requiring different wetted materials. This universal approach simplifies manufacturing, reduces part variety, and eliminates the complexity of matching specific materials to specific cooling applications while maintaining optimized cooling performance through system adjustments.
3Loss of energy
If visible tubing systems are installed for liquid cooling, then heat transfer capability is improved, but the risk of leaks and damage increases
Solution Approach 1:
The patent embeds the cooling tubing and heat exchangers within the rack structure itself rather than using external visible tubing. The first cooling loop tubing is routed through integrated channels in the rack units, and heat exchangers are mounted within the rack enclosure. This nesting approach maintains effective heat transfer capability while protecting the tubing from external damage and reducing leak risks by eliminating exposed connections and external routing.
4Power
If cooling systems are designed for high-density servers, then cooling capacity is improved, but adaptability to different server configurations decreases
Solution Approach 1:
The patent employs a dynamic cooling system where the flow rate of dielectric fluid through the first cooling loop can be adjusted based on the specific thermal load and configuration of servers in each rack unit. The system can adapt to different server densities, power consumptions, and thermal characteristics by varying pump speeds and flow distribution without requiring redesign for each configuration. This dynamic adjustability maintains high cooling capacity for dense configurations while providing versatility across different server arrangements.
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
Enables efficient and reliable cooling of high-density servers without visible tubing, allowing for component changes without downtime, and reducing the risk of leaks and damage, while maintaining consistent cooling performance.
Implementation Method 1
a first cooling loop with a heat exchanger to exchange heat with a second cooling loop
Implementation Method 2
the second cooling loop includes a cooling distribution unit (CDU) to exchange heat between the second cooling loop and a primary cooling loop
Data Source
AI summary
A datacenter cooling system is disclosed. The system includes a first cooling loop with a heat exchanger to exchange heat with a second cooling loop. The second cooling loop includes a cooling distribution unit (CDU) to exchange heat between the second cooling loop and a primary cooling loop.