Monolithic Substrate Water Separation Device for Engine Exhaust
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current water vapor separation technologies using capillary condensation face challenges in efficiency and cost due to temperature-dependent condensation rates and thermal conductivity issues, leading to increased substrate volume and manufacturing costs, as well as reduced efficiency from heat release during condensation.
Innovation Solution
A water separation device with a monolithic substrate and a porous membrane coated with capillary condensation pores, optimized for high thermal conductivity and surface area to volume ratio, which enhances capillary condensation efficiency and reduces packaging constraints and manufacturing costs by maintaining a low temperature for effective water vapor condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the volume of the substrate is increased to enhance water removal capacity, then the water collection efficiency is improved, but the manufacturing cost increases and packaging constraints are worsened
Solution Approach 1:
The patent changes the temperature parameter of the substrate to optimize capillary condensation. By maintaining the substrate at a lower temperature (e.g., using cooling mechanisms or selecting materials with appropriate thermal properties), the extent of capillary condensation is enhanced, allowing for more effective water vapor condensation without requiring increased substrate volume. This resolves the contradiction by improving water collection efficiency through parameter optimization rather than volume increase.
Solution Approach 2:
The patent employs composite material structures, specifically a porous substrate coated with a porous membrane having controlled pore sizes. This composite structure enhances the capillary condensation effect at the membrane surface, allowing for high water collection efficiency in a compact substrate configuration. The combination of substrate and membrane materials with specific pore size distributions maximizes water vapor condensation without requiring large substrate volume.
2Loss of energy
If the thermal conductivity of the substrate is too low, then the heat release from water condensation increases the substrate temperature, but this reduces the extent of capillary condensation and water collection efficiency
Solution Approach 1:
The patent addresses this contradiction by controlling the thermal conductivity parameter of the substrate material. By selecting or engineering substrate materials with appropriate thermal conductivity properties, the system can effectively dissipate the heat released during condensation, preventing excessive temperature rise that would reduce capillary condensation efficiency. This parameter optimization allows the system to handle heat release without sacrificing water collection efficiency.
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 effectively increases water vapor condensation efficiency while minimizing the size and cost of the device, maintaining a uniform temperature and reducing heat-related efficiency losses, thus improving the overall performance and cost-effectiveness of the water separation process.
Implementation Method 1
capillary condensation of water vapor from gas flowing along the porous membrane
Implementation Method 2
the pores confine the water vapor molecules, which increases van der Waals interactions between the water vapor molecules to ultimately result in condensation of the water vapor to liquid water
Implementation Method 3
heat release from water condensation could increase the temperature of the enlarged substrate, and reduce the extent to which capillary condensation occurs
Data Source
AI summary
A system includes an engine and an exhaust conduit in communication with the engine. A water separation device has exhaust gas passageways in communication with the exhaust conduit. The water separation device has a substrate and a membrane on the substrate. The substrate is monolithic and extends around the exhaust gas passageways. The membrane is between the exhaust gas passageways and the substrate and has capillary condensation pores extending from the exhaust gas passageways to the substrate.