Immersion Cooling System Pressure Control via Separation Tank
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Solution Overview
Problem
Open two-phase immersion cooling systems face challenges in controlling pressure and temperature within the tank, leading to difficulties in maintaining the boiling point of dielectric liquid and complicating open-lid maintenance due to the inability to effectively control the heat exchange amount and vapor concentration.
Innovation Solution
A cooling system with a tank, heat exchanger, separation tank, and gas storage device, along with valves and tubes, allows for controlled degassing and pressure management by measuring hydraulic pressures and temperatures to regulate the system's operation, ensuring appropriate pressure and temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the system is controlled according to the outlet temperature of the heat exchanger, then the temperature control is simplified, but the pressure in the tank cannot be effectively controlled
Solution Approach 1:
The patent implements a feedback control mechanism where pressure sensors continuously monitor the tank pressure and provide signals to the control unit. The control unit adjusts the heat exchanger operation based on this feedback to maintain pressure within the desired range, enabling effective pressure control while maintaining operational simplicity
Solution Approach 2:
The patent introduces a control unit as an intermediary between the heat exchanger and the tank pressure system. This control unit processes temperature and pressure signals and coordinates the operation of expansion valves and heat exchangers to achieve both temperature and pressure control objectives simultaneously
2Stability of the object's composition
If the pressure in the tank is not controlled, then the boiling point of dielectric liquid changes, but controlling pressure through outlet temperature is difficult
Solution Approach 1:
The control system uses feedback from pressure sensors to continuously monitor and adjust system parameters, ensuring that pressure remains stable and the boiling point of the dielectric liquid remains constant. This automated feedback mechanism eliminates the difficulty of manual pressure control
Solution Approach 2:
The patent employs parameter changes by adjusting the refrigerant flow rate and heat exchanger operating conditions based on detected pressure variations. When pressure deviates from the setpoint, the system modifies these parameters to restore pressure stability, thereby maintaining constant boiling point conditions
3Temperature
If the heat exchange amount is increased to cool electronic components, then the temperature control improves, but the vapor concentration and temperature of mixed gas at the vapor side change significantly
Solution Approach 1:
The system uses feedback control where sensors monitor both temperature and vapor concentration. When heat exchange amount changes affect vapor concentration beyond acceptable limits, the control unit adjusts the refrigerant flow or heat exchanger operation to maintain vapor concentration within the desired range while still achieving effective cooling
Solution Approach 2:
The patent implements dynamic control where the heat exchange amount, refrigerant flow rate, and system parameters are continuously adjusted based on real-time measurements of temperature and vapor concentration. This dynamic adjustment allows the system to optimize cooling performance while maintaining stable vapor concentration levels
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 effectively manages pressure and temperature, preventing damage from over-pressure, maintaining stable boiling points, and simplifying open-lid maintenance, thereby enhancing the reliability and stability of the cooling system for applications like AI computing and edge computing.
Implementation Method 1
The heat exchanger includes a first heat exchanger interface and a second heat exchanger interface for condensing a dielectric vapor of the dielectric liquid
Implementation Method 2
a heating element is placed in the tank and immersed in a dielectric liquid
Implementation Method 3
the boiling point of the dielectric liquid due to pressure changes
Implementation Method 4
The separation tank includes a first separation tank interface, a second separation tank interface and a third separation tank interface, and is for performing a separation operation
Data Source
AI summary
A cooling system includes a tank, a heat exchanger, a separation tank, a first tube, a second tube, a third tube, a gas storage device, a fourth tube, a first valve, a second valve and a third valve. A heating element is immersed in a dielectric liquid in the tank. The heat exchanger condenses dielectric vapor of the dielectric liquid. The separation tank is used for a separation operation. The first tube is connected to the tank and the heat exchanger. The second tube is connected to the heat exchanger and the separation tank. The third tube is connected to the separation tank and the tank. The gas storage device stores the dielectric vapor. The fourth tube is connected to the gas storage device and the separation tank.