Coolant Phase Separation for Water Cooling With Freeze Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cooling systems face inefficiencies when using either pure water or a mixture of antifreeze and water, as pure water has a higher heat transfer coefficient but freezes at 0°C, while mixtures lower the freezing point but reduce efficiency, leading to difficulties in maintaining effective cooling across varying temperatures.
Innovation Solution
A cooling system that separates a fluid coolant mixture of antifreeze and water into separate streams, allowing for the use of pure water for efficient cooling and recombining when necessary to prevent freezing, utilizing a heating device to vaporize water while keeping antifreeze liquid, and a separation structure to manage the phases within the cooling loop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pure water is used as coolant, then heat transfer coefficient is improved, but freezing point remains at 0°C causing freezing risk
Solution Approach 1:
The cooling system is divided into separate loops: a primary loop uses pure water for efficient heat transfer, while a secondary loop uses antifreeze mixture for freeze protection. The segmentation allows each loop to optimize for its specific function without compromise.
Solution Approach 2:
The harmful antifreeze component is extracted from the primary cooling loop and placed in a separate secondary loop. Only pure water circulates in the primary loop where it contacts the heat-generating structure, eliminating freeze risk in the critical cooling path while maintaining overall system freeze protection.
2Object-affected harmful factors
If antifreeze and water mixture is used, then freezing point is lowered, but heat transfer coefficient is reduced
Solution Approach 1:
The antifreeze is extracted from the primary cooling path and confined to a secondary loop. The primary loop contains only pure water that directly contacts the heat-generating structure, maximizing heat transfer efficiency while the secondary loop provides freeze protection.
Solution Approach 2:
Different quality coolant compositions are used in different parts of the system: pure water in the primary loop where high heat transfer is needed, and antifreeze mixture in the secondary loop where freeze protection is the primary concern.
3Temperature
If pressure is reduced to subambient, then boiling temperature decreases for evaporative cooling, but separation of coolant components becomes more difficult
Solution Approach 1:
The separation function is segmented into dedicated components: a vapor-liquid separator that uses gravity and density differences to separate water vapor from antifreeze liquid, and a condenser that independently condenses the water vapor. This segmentation simplifies the overall separation task.
Solution Approach 2:
The system exploits phase transition differences between water and antifreeze at subambient pressures. Water vaporizes and can be separated as gas phase, while antifreeze remains liquid. The separated water vapor is then condensed back to liquid form, completing the separation process.
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 approach enhances cooling efficiency by using pure water for heat transfer while preventing freezing through the separation and recombination of antifreeze and water, optimizing performance across different temperature conditions.
Implementation Method 1
The heating device vaporizes a substantial portion of the water into vapor while leaving a substantial portion of the antifreeze as liquid
Implementation Method 2
The separation structure receives, from the heating device, the flow of fluid coolant with the substantial portion of the water as vapor and the substantial portion of the antifreeze as liquid. The separation structure separates one of the substantial portion of the water as vapor or the substantial portion of the antifreeze as liquid from the cooling loop
Implementation Method 3
a cooling system for cooling a heat-generating structure including a flow of fluid coolant comprising a mixture of antifreeze and water
Data Source
AI summary
According to one embodiment of the invention, a cooling system for a heat-generating structure includes a heating device, a cooling loop, and a separation structure. The heating device heats a flow of fluid coolant including a mixture of water and antifreeze. The cooling loop includes a director structure which directs the flow of the fluid coolant substantially in the form of a liquid to the heating device. The heating device vaporizes a substantial portion of the water into vapor while leaving a substantial portion of the antifreeze as liquid. The separation structure receives, from the heating device, the flow of fluid coolant with the substantial portion of the water as vapor and the substantial portion of the antifreeze as liquid. The separation structure separates one of the substantial portion of the water as vapor or the substantial portion of the antifreeze as liquid from the cooling loop while allowing the other of the substantial portion of the water as vapor or the substantial portion of the antifreeze as liquid to remain in the cooling loop.