Coolant Distribution Unit Control for Blockage-Tolerant Liquid Cooling
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Solution Overview
Problem
Traditional air cooling methods are inadequate for effectively managing heat in high-power density electronic components, and existing liquid cooling systems face challenges in maintaining efficient operation and preventing blockages, leading to potential thermal shutdowns.
Innovation Solution
A high-density liquid cooling system with a coolant distribution unit (CDU) that includes temperature and pressure monitoring, pump control mechanisms, and bypass valves to maintain efficient operation, detect blockages, and extend runtime by adjusting flow rates and bypassing components for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional air cooling methods are used, then the system is simple to implement, but the cooling efficiency is insufficient for high-power density electronic components
Solution Approach 1:
The patent transitions from air cooling to liquid cooling by implementing a coolant distribution unit with pumps, heat exchangers, and coolant flow through electronic components. This hydraulic system provides superior heat removal capability for high-power density components while maintaining system reliability through controlled coolant circulation and thermal management.
2Reliability
If liquid cooling systems are implemented, then cooling efficiency improves, but the risk of blockages and thermal shutdowns increases
Solution Approach 1:
The patent implements monitoring systems that track coolant flow rates, temperatures, and pressure differentials across the cooling system. Control algorithms use this feedback to detect blockages, adjust pump operations, and prevent thermal shutdowns by maintaining optimal coolant circulation and identifying issues before they cause system failure.
Solution Approach 2:
The patent incorporates bypass valves and alternative flow paths that activate before complete blockage occurs. These pre-configured safety mechanisms allow coolant to bypass blocked sections, preventing thermal shutdowns and giving operators time to address the underlying issue without system failure.
3Reliability
If coolant flow rate is increased, then heat removal capability improves, but system complexity and control requirements increase
Solution Approach 1:
The patent employs variable speed pumps and adjustable flow control valves that dynamically adapt coolant flow rates to actual thermal demands. This dynamic control optimizes heat removal capability while reducing unnecessary complexity by adjusting flow only when and where needed, rather than maintaining constant high flow throughout the system.
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
The CDU enhances cooling efficiency, prevents thermal shutdowns, and extends system uptime by dynamically adjusting flow rates and bypassing blocked components, ensuring reliable operation in high-density electronic environments.
Implementation Method 1
CDUs typically include a liquid to liquid heat exchanger, which allows heat transfer from coolant in a secondary loop to a primary loop
Implementation Method 2
liquid cooling systems face challenges in maintaining efficient operation and preventing blockages, leading to potential thermal shutdowns
Data Source
AI summary
Embodiments of the invention provide a high density liquid cooling system and various monitoring and control methods. Some methods include calculating a heat transfer efficiency of a heat exchanger based on a temperature difference and calculating a total heat rejection value based on the heat transfer efficiency. Some methods include increasing a secondary flow rate in a secondary coolant loop as a maximum allowable pressure is approached to extend an operating time period and avoid thermal shut down of the high density liquid cooling system.