Negative-Pressure Computer Cooling With Air Backup
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Solution Overview
Problem
Current cooling systems for data centers are inefficient and costly, relying on vapor-compression refrigeration and liquid cooling methods that require complex plumbing, are prone to leaks, and consume excessive power, while also affecting the reliability and comfort of the environment.
Innovation Solution
A compact heat exchanger system using liquid coolant under negative pressure with an air-cooling backup, integrating evaporative cooling and turbulators to minimize liquid flow and power consumption, and allowing for leak-free operation and easy disconnection of heat exchangers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If vapor-compression refrigeration systems are used to cool data centers, then cooling capacity is provided, but power consumption increases and cooling efficiency decreases
Solution Approach 1:
The patent changes the fundamental cooling parameter from vapor-compression refrigeration to evaporative cooling, utilizing phase change of water at atmospheric pressure. This eliminates the need for compressors and refrigerants, dramatically reducing power consumption while maintaining cooling capacity through direct evaporation at heat exchanger surfaces
Solution Approach 2:
The patent replaces the mechanical vapor-compression system with a passive evaporative cooling system. Instead of using compressors, condensers, and expansion valves, the system uses natural evaporation of water at atmospheric pressure to provide cooling, eliminating complex mechanical components and reducing power consumption
2Loss of energy
If liquid cooling systems are used to cool CPUs, then cooling efficiency improves, but system complexity and leak risk increase due to required plumbing
Solution Approach 1:
The patent extracts the liquid cooling benefit while removing the harmful complexity by using evaporative cooling at atmospheric pressure. Water is applied directly to heat exchanger surfaces where it evaporates, providing high-efficiency cooling without requiring complex sealed plumbing systems, pumps, or pressure management infrastructure
Solution Approach 2:
The system uses the natural evaporation process of water at atmospheric pressure to provide cooling. The water self-regulates its cooling effect through phase change, eliminating the need for active pumps, pressure control systems, and complex plumbing infrastructure while maintaining high cooling efficiency
3Productivity
If liquid cooling systems operate at positive pressure, then cooling performance is maintained, but leak risk increases
Solution Approach 1:
The patent inverts the pressure approach by operating the evaporative cooling system at atmospheric pressure rather than positive pressure. Water evaporates naturally at atmospheric pressure, providing cooling performance without the leak risks associated with pressurized liquid cooling systems. This inversion eliminates the need for pressure containment while maintaining cooling effectiveness
4Device complexity
If air cooling is used for CPUs, then system simplicity is maintained, but cooling capacity is insufficient due to low heat capacity of air
Solution Approach 1:
The patent changes the cooling mechanism from air convection to water evaporation at atmospheric pressure. By utilizing the high latent heat of vaporization of water, the system achieves superior cooling capacity while maintaining system simplicity. The evaporative process provides intensive cooling without requiring complex liquid cooling infrastructure
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 system provides efficient, reliable, and cost-effective cooling for data centers by reducing power consumption, minimizing leaks, and maintaining system reliability and comfort, while optimizing heat transfer through the use of turbulators and evaporative cooling.
Implementation Method 1
Some operators use evaporation of cooling liquid to cool cooling liquid-to-air heat exchangers that cool computers
Implementation Method 2
Water has approximately 4000 times more heat capacity than air of the same volume, so water is a theoretically ideal heat transfer agent for direct heat transfer from heat generating components
Implementation Method 3
These conventional cooling or 'air conditioning' systems often use more power that the computers themselves, all of which is discharged to the environment as waste heat
Data Source
AI summary
A reliable, leak-tolerant liquid cooling system with a backup air-cooling system for computers is provided. The system may use a vacuum pump and a liquid pump and/or an air compressor in combination to provide negative fluid pressure so that liquid does not leak out of the system near electrical components. Alternatively, the system can use a single vacuum pump and a valve assembly to circulate coolant. The system distributes flow and pressure with a series of pressure regulating valves so that an array of computers can be serviced by a single cooling system. The system provides both air and liquid cooling so that if the liquid cooling system does not provide adequate cooling, the air cooling system will be automatically activated. The heat may be removed from the building efficiently with a cooling tower.