Level Sensing Module for Immersion-Cooled Device Fluid Volume
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Solution Overview
Problem
Existing liquid immersion cooling systems face challenges in accurately monitoring the volume of dielectric fluid in the chassis, especially due to fluid loss and irregular geometries of electronic devices, which can lead to inadequate temperature management and wasteful fluid usage.
Innovation Solution
A level sensing module is introduced, comprising a fluid level sensor and a controller that generates a high-resolution map of dielectric fluid volume within the device chassis by measuring fluid height and volume, compensating for temperature-induced expansions or retractions, and sending alerts for fluid loss, thereby accurately monitoring fluid levels and preventing overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional liquid level sensors are used to monitor dielectric fluid levels, then fluid level detection is provided, but accurate volume measurement is not achieved due to irregular geometries and temperature variations
Solution Approach 1:
The monitoring system is divided into multiple independent level sensors positioned at different heights within the chassis, each measuring fluid level at a specific zone. This segmentation allows the system to calculate total volume by summing contributions from each sensor zone, accommodating irregular geometries without requiring a single complex measurement device.
Solution Approach 2:
The controller receives continuous feedback signals from multiple level sensors and uses this data to dynamically calculate and update the dielectric fluid volume. Temperature sensor feedback is also incorporated to compensate for thermal expansion and contraction of the fluid, maintaining measurement accuracy under varying operating conditions.
2Reliability
If dielectric fluid volume is not accurately monitored, then temperature management may be inadequate, but implementing complex monitoring solutions increases system complexity and cost
Solution Approach 1:
The monitoring system serves multiple functions: it measures dielectric fluid volume, detects temperature variations, calculates fluid mass, and provides alerts for low fluid levels or leaks. This multi-functionality is achieved through a coordinated system of level sensors, temperature sensors, and a controller that processes data from all sensors to provide comprehensive monitoring without requiring separate dedicated systems for each function.
Solution Approach 2:
The system automatically monitors its own operating conditions using the installed sensors and controller, eliminating the need for manual inspection. The controller self-calculates fluid volume and mass based on sensor readings and automatically generates alerts when intervention is needed, reducing operational complexity and improving reliability through continuous automated monitoring.
3Device complexity
If simple level monitoring is implemented, then system complexity is reduced, but fluid loss detection and temperature management reliability are compromised
Solution Approach 1:
The system transitions from single-point level measurement to multi-dimensional volume assessment by deploying sensors at multiple heights and positions within the chassis. This spatial distribution of sensors enables accurate volume calculation that accounts for the irregular three-dimensional geometry of the cooling system, providing precise measurement without excessive complexity.
Solution Approach 2:
The system compensates for temperature-induced volume changes by continuously monitoring temperature and adjusting volume calculations accordingly. As temperature varies, the controller applies correction factors to account for thermal expansion and contraction of the dielectric fluid, maintaining measurement precision across different operating temperatures without requiring complex hardware modifications.
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 solution enables precise monitoring of dielectric fluid volume, identifying potential leaks, maintaining optimal operating temperatures, and reducing the wasteful usage of dielectric fluids, thus enhancing the efficiency and cost-effectiveness of liquid immersion cooling systems.
Implementation Method 1
a fluid level sensor... receive a signal from the fluid level sensor indicative of a height of dielectric fluid in the device chassis
Implementation Method 2
the controller is configured to receive a signal from a temperature sensor indicative of a temperature of the dielectric fluid in the device chassis
Implementation Method 3
the controller is configured to update the map of dielectric fluid volume to compensate for at least one of dielectric fluid expansions or retractions based on a temperature of the dielectric fluid
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A level sensing module for use with a liquid immersion cooling system having a device chassis housing an electronic device, the level sensing module comprising a fluid level sensor, and a controller coupled to the fluid level sensor and configured to receive a signal from the fluid level sensor indicative of a height of dielectric fluid in the device chassis, receive a signal from a pump controller indicative of a volume of dielectric fluid provided to the device chassis, and generate a map of dielectric fluid volume within the device chassis based on the signal from the fluid level sensor and the signal from the pump controller.