Thermal Buffer Unit for Electronics Cooling
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Solution Overview
Problem
Current cooling systems for data centers face challenges in efficiently managing variations in heat load and cooling conditions, requiring complex control strategies that are not universally effective across different scenarios, leading to reliability and efficiency issues.
Innovation Solution
A cooling system design incorporating a thermal buffering concept with a bidirectional buffer unit that includes an air section and a fluid section, using temperature and pressure sensors to adjust air pressure and control fluid flow, allowing for efficient heat exchange and pressure-based system control, thereby addressing mismatches in heat load and cooling capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cooling system uses complex control strategies to manage heat load variations, then the system can respond to different cooling scenarios, but the system reliability and efficiency decrease due to the complexity
Solution Approach 1:
The cooling system is divided into two independent loops: a first loop for heat exchange and a second loop for buffering and pressure control. This segmentation allows each loop to perform its specific function optimally without interfering with the other, simplifying control strategies while maintaining adaptability to different cooling scenarios.
Solution Approach 2:
The buffer unit acts as an intermediary between the heat exchanger and the electronic devices. It includes an air section that mediates pressure fluctuations and a fluid section that stores and releases coolant, smoothing out variations in heat load and maintaining stable cooling without requiring complex control systems.
2Adaptability or versatility
If a cooling system uses complex control strategies to manage heat load variations, then the system can respond to different cooling scenarios, but the device complexity increases
Solution Approach 1:
The cooling system is divided into two independent loops: a first loop for heat exchange and a second loop for buffering and pressure control. This segmentation allows each loop to perform its specific function optimally without interfering with the other, simplifying control strategies while maintaining adaptability to different cooling scenarios.
Solution Approach 2:
The buffer unit automatically responds to pressure and temperature variations through its design. The air section expands and contracts to accommodate pressure changes, and the fluid section naturally stores and releases coolant based on pressure differentials, eliminating the need for complex active control mechanisms.
3Productivity
If the buffer unit stores fluid to manage heat load fluctuations, then the system efficiency improves, but the volume of the buffer unit increases
Solution Approach 1:
The buffer unit integrates the air section and fluid section in a nested configuration where the air section is positioned within or adjacent to the fluid section. This nested design allows the air section to occupy space that would otherwise be unused, reducing the overall volume required for the buffer unit while maintaining its thermal storage capacity.
Solution Approach 2:
The buffer unit utilizes changes in the physical parameters of the coolant (temperature, pressure, density) to store and release thermal energy. By exploiting these parameter changes, the system achieves high efficiency with a more compact buffer unit volume, as the same volume can store more energy when utilizing phase changes or compression effects.
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 proposed solution enhances the reliability and efficiency of the cooling system by effectively managing heat load fluctuations and improving system usability across varying scenarios, simplifying control design and integrating well with both single-phase and two-phase fluid cooling systems.
Implementation Method 1
a first loop having a heat exchanger coupled to the inlet port and the outlet port, wherein the heat exchanger is to receive fluid from the inlet port, to exchange heat generated by the electronic devices and carried by the fluid
Implementation Method 2
the air section is to adjust an air pressure based on a temperature obtained from a temperature sensor disposed on the heat exchanger and a fluid pressure obtained from a pressure sensor disposed near the inlet port
Data Source
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AI summary
A cooling system includes an inlet port and an outlet port to be coupled to one or more electronic devices, a main loop, and a buffer loop. The main loop includes a heat exchanger coupled to the inlet port and the outlet port, and the heat exchanger is to receive fluid from the inlet port, to exchange heat generated by the electronic devices and carried by the fluid, and to return the fluid to the electronic devices via the outlet. A buffer loop is coupled to the inlet port and the main loop. The second loop includes a buffer unit and a first valve to control the fluid to flow into the buffer unit for storage and to discharge the fluid from the buffer unit to follow into the main loop for heat exchange. The buffer unit comprises an air section to store air and a buffer section to store a portion of the fluid. The air section is to adjust an air pressure based on a temperature obtained from a temperature sensor disposed on the heat exchanger and a fluid pressure obtained from a pressure sensor disposed near the inlet port.