Temperature-Regulated Chip Cooling Flow for Constant Pressure Loops
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Solution Overview
Problem
Existing direct-to-chip cooling systems face inefficiencies due to constant flow rates that lead to over-cooling of idle chips, energy waste, and maldistribution of coolant, particularly in data centers with varying heat loads and hydraulic characteristics.
Innovation Solution
Implementing a cooling system with independent flow regulators that maintain a constant differential pressure and adjust flow based on temperature, using mechanical temperature sensors to regulate coolant flow through each cold plate independently, thereby optimizing cooling according to processor activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant flow rate is maintained in cooling systems, then cooling reliability is ensured, but energy consumption increases due to over-cooling idle chips
Solution Approach 1:
The system transitions from static constant flow rate to dynamic variable flow rate control. Flow regulators adjust coolant flow rates in real-time based on actual chip thermal conditions, allowing the system to adapt flow to actual cooling needs and reduce energy consumption during low-load periods while maintaining reliability when needed.
Solution Approach 2:
Temperature sensors monitor chip temperatures and provide feedback to flow regulators. This closed-loop feedback mechanism enables the system to automatically adjust flow rates based on actual thermal conditions, preventing over-cooling and reducing pump energy consumption while ensuring adequate cooling when required.
2Device complexity
If constant flow rate is used across multiple cold plates, then system simplicity is maintained, but maldistribution occurs due to varying hydraulic characteristics
Solution Approach 1:
The system divides the cooling circuit into independent segments, with separate flow regulators for each cold plate. This segmentation allows each cold plate to receive optimized flow rates tailored to its specific hydraulic characteristics and thermal load, eliminating maldistribution while keeping the overall system architecture relatively simple and modular.
Solution Approach 2:
Each cold plate receives customized flow control based on its local thermal conditions and hydraulic characteristics. Flow regulators are tuned to provide optimal flow distribution for each specific cold plate, ensuring uniform cooling across all components while maintaining system simplicity through independent local control.
3Manufacturing precision
If independent flow regulators are added to each cold plate, then flow distribution precision is improved, but device complexity increases
Solution Approach 1:
The system segments flow control into independent units for each cold plate, with dedicated flow regulators that can be independently tuned and controlled. This segmentation achieves precise flow regulation for each component while maintaining modular simplicity and avoiding the need for complex centralized control systems.
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 reduces power consumption, enhances system reactivity, and improves heat recovery by dynamically adjusting flow rates to match thermal loads, minimizing energy waste and optimizing cooling efficiency across multiple cold plates.
Implementation Method 1
a flow regulator for regulating flow through the warm fluid line based at least in part on a temperature of the cooling fluid flowing through the warm fluid line
Implementation Method 2
coolant flow through each cold plate independently, thereby optimizing cooling according to processor activity
Implementation Method 3
maintaining a constant, or near constant, differential pressure across the system
Implementation Method 4
a cold plate thermally coupled to a processor
Data Source
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AI summary
A cooling system for direct-to-chip cooling can include a cold manifold for distributing a cooling fluid within an enclosure, a warm manifold for receiving the cooling fluid from within the enclosure, a cold fluid line fluidically coupled between the cold manifold and a cold plate thermally coupled to a processor, a warm fluid line fluidically coupled between the warm manifold and the cold plate, and a flow regulator to regulate flow through the warm fluid line based at least in part on a temperature of the cooling fluid flowing through the warm fluid line. The cooling system can include a cold fluid line, a cold plate, a warm fluid line, and a flow regulator for each processor. The cooling system can include a pump that maintains a differential pressure between the cold manifold and the warm manifold independently of a flow rate through individual regulators.