Refrigerant Distribution Unit for Datacenter Cooling
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Solution Overview
Problem
Datacenter cooling systems face challenges in efficiently managing varying heat loads from high-density computing components, as traditional liquid cooling methods require high coolant flow rates that can lead to erosion and corrosion, and existing systems lack efficient methods for heat removal at high densities without central chiller systems.
Innovation Solution
The implementation of an intelligent refrigerant distribution unit (RDU) that interfaces between refrigerant cooling loops, using refrigerant-to-refrigerant heat exchangers (R2RHX) to transfer heat from high-density computing devices to a secondary refrigerant loop for dissipation, eliminating the need for high coolant flow rates and central chiller systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional liquid cooling methods are used to remove heat from high-density computing components, then heat removal efficiency is improved, but coolant flow rate must be increased which leads to erosion and corrosion
Solution Approach 1:
The patent changes the physical state parameter of the cooling medium from liquid coolant to refrigerant, enabling phase change cooling. This allows heat removal at lower flow rates by utilizing the latent heat of vaporization, thereby reducing erosion and corrosion while maintaining high heat removal efficiency
Solution Approach 2:
The patent employs phase transition of refrigerant (liquid to vapor) in the evaporator to absorb heat from computing components. The refrigerant absorbs large amounts of heat during phase change at constant temperature, providing efficient cooling without requiring high flow rates that cause material degradation
2Power
If central chiller systems are used for datacenter cooling, then cooling capacity is sufficient, but system complexity and infrastructure requirements increase
Solution Approach 1:
The patent segments the cooling system into distributed refrigerant cycles at rack or row level, eliminating the need for a centralized chiller. Each segment operates independently with its own refrigerant loop, reducing system complexity and infrastructure requirements while maintaining sufficient cooling capacity
Solution Approach 2:
The patent introduces refrigerant-to-refrigerant heat exchangers as intermediaries that enable heat transfer between computing equipment and the refrigerant cooling cycle without requiring direct liquid coolant connections, simplifying the overall system architecture
3Device complexity
If air cooling systems are used for datacenters, then system simplicity is maintained, but heat density handling capability is insufficient
Solution Approach 1:
The patent uses refrigerant fluid circulation through evaporators and heat exchangers to achieve high-density heat removal, leveraging fluid-based thermal transfer to overcome the limitations of air cooling while maintaining relatively simple system architecture
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 enables efficient and low-power heat removal from datacenters, supporting higher heat densities than traditional air or liquid cooling systems, while reducing material erosion and corrosion, and allowing for refrigeration at edge locations without extensive infrastructure.
Implementation Method 1
a refrigerant-to-refrigerant heat exchanger (R2RHX) to exchange at least part of heat absorbed to a secondary refrigerant from a secondary refrigerant cooling loop to a primary refrigerant cooling loop
Implementation Method 2
a second condenser unit associated with the R2RHX and adapted to dissipate at least part of the heat absorbed to the second refrigerant from the second refrigerant cooling loop to an ambient environment external to a datacenter
Data Source
AI summary
Systems and methods for cooling a datacenter are disclosed. In at least one embodiment, a refrigerant distribution unit (RDU) distributes first refrigerant from a refrigerant reservoir to one or more cold plates to extract heat from at least one computing device and also interfaces between a first refrigerant cooling loop having a first refrigerant and a second refrigerant cooling loop, so that a second refrigerant cooling loop uses second refrigerant to dissipate at least part of such heat through a second condenser unit to an ambient environment.