Scalable coolant distribution unit
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Solution Overview
Problem
In datacenter coolant distribution systems, transitioning from a failed coolant distribution unit (CDU) to a redundant one can cause liquid overflow in remaining functional CDUs, disrupting vacuum systems and potentially damaging equipment, due to unmanaged liquid return and reservoir level imbalances.
Innovation Solution
A scalable coolant distribution system enables communication between CDUs to balance reservoir liquid levels by adjusting vacuum pump pressures, ensuring uninterrupted operation and preventing overflow by moving liquid from CDUs with higher levels to those with lower levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant CDU is activated to replace a failed CDU, then system reliability is improved, but liquid overflow occurs in remaining functional CDUs causing harmful effects
Solution Approach 1:
The system implements feedback by having CDUs communicate their reservoir liquid levels to each other. Each CDU receives information about the liquid levels in other CDUs and uses this feedback to determine when to activate vacuum pumping operations, preventing overflow by responding to real-time level information from the system state
Solution Approach 2:
The system performs preliminary action by activating vacuum pumps in functional CDUs before liquid return from a failed CDU can cause overflow. The lead CDU identifies when a CDU has failed and proactively activates vacuum pumping in remaining functional CDUs to prepare for and prevent the harmful overflow effect
2Manufacturing precision
If vacuum pump pressure is increased to prevent liquid overflow, then liquid level control is improved, but energy consumption increases
Solution Approach 1:
The system uses periodic action by activating vacuum pumps only during specific periods when needed - namely when a CDU failure is detected and when liquid levels approach critical thresholds. The pumps are not operated continuously but in periodic intervals based on system conditions, reducing unnecessary energy consumption while maintaining liquid level control
Solution Approach 2:
The system applies parameter changes by dynamically adjusting vacuum pump pressure levels based on liquid level conditions. The vacuum pressure is increased only when liquid levels indicate a risk of overflow, and reduced or deactivated when levels are safe, optimizing the balance between control precision and energy consumption
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 allows for seamless transition between CDUs, maintaining system integrity and preventing equipment damage by dynamically managing liquid levels and pump parameters, ensuring continuous cooling performance even with CDU failures.
Implementation Method 1
a pressure difference is created to move the liquid from the liquid reservoir to the heat exchanger
Implementation Method 2
The vacuum system can utilize a vacuum pump that can provide a liquid loop that is under vacuum. The vacuum system can be utilized to mitigate leaks which can damage equipment within a computing rack.
Data Source
AI summary
In one implementation, a system for scalable coolant distribution unit includes a parameters engine to determine real time pump parameters of a first CDU, wherein the real time pump parameters correspond to a functionality of the first CDU, a pump engine to alter pump parameters of the first CDU based on the real time pump parameters, a communication engine to send the altered pump parameters of the first CDU to a second CDU, the pump engine to alter pump parameters of the second CDU based on the altered pump parameters of the first CDU and determined real time pump parameters of the second CDU, a functionality engine to determine a functionality of the first CDU and the second CDU based on the real time pump parameters and altered pump parameters.