Capillary Wick Wetting for Orientation-Stable Particle Condensation
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Solution Overview
Problem
Existing laminar flow water condensation systems for ultrafine particles face complications in water handling, risk of flooding, and sensitivity to orientation due to the need for internal reservoirs and protrusions, which can disrupt the flow and require complex water management systems.
Innovation Solution
The introduction of a self-sustaining wick system that relies on capillary action to transport water from colder regions where vapor condenses to warmer sections for evaporation, and a siphoned wick system that maintains a water-filled gap behind the wick, eliminating the need for external reservoirs and allowing operation in various orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If an internal reservoir wetting system is used, then water supply to the wick is improved, but device complexity and risk of flooding increase
Solution Approach 1:
The patent removes the internal reservoir and protruding structures from the flow channel, extracting the water storage function to an external reservoir. This eliminates the complexity of water handling within the flow path while maintaining continuous water supply to the wick through simplified external connections.
Solution Approach 2:
The patent introduces a capillary wick as an intermediary between the external water source and the evaporation surface. The wick mediates water transport through capillary action, eliminating the need for complex pumping or pressurization systems while ensuring reliable water supply to the evaporative cooling surface.
2Quantity of substance
If protrusions are added to the flow channel for reservoir wetting, then water supply is improved, but flow disruption and device complexity increase
Solution Approach 1:
The patent extracts the water reservoir from the flow channel, removing all protruding structures that disrupt laminar flow. The flow channel remains clear and uninterrupted, while water supply is maintained through external reservoir connections that feed the wick without entering the flow path.
3Quantity of substance
If an internal reservoir system is used, then water storage is improved, but sensitivity to orientation and flooding risk increase
Solution Approach 1:
The patent removes the internal reservoir that created orientation sensitivity and flooding risks. Water storage is relocated to an external reservoir that can be positioned independently, eliminating the connection between device orientation and water management reliability.
Solution Approach 2:
The patent employs capillary action in the wick to automatically regulate water flow from the external reservoir to the evaporative surface. This self-regulating mechanism prevents flooding by limiting water uptake to what the evaporation surface can handle, regardless of device orientation or external reservoir position.
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
These solutions enable extended operation without water replenishment, reduce the risk of flooding, and simplify water handling, while maintaining water vapor supersaturation for effective condensational growth of ultrafine particles, allowing for robust and efficient particle detection or collection.
Implementation Method 1
a self-sustaining wick relies on capillary action of the wick material to transport water from colder regions where water vapor condenses onto the wick surface to warmer sections where it evaporates
Implementation Method 2
water vapor condenses onto the wick surface
Implementation Method 3
warmer sections where it evaporates
Data Source
AI summary
A system and method for particle enlargement with continuously wetted wicks includes a container into which a flow of particle-laden air is introduced in a laminar manner through an inlet and to an outlet. The container has a first section, a second section and a third section though which the particle-laden air flows between the inlet and the outlet. The temperature of the second section is warmer than that of the first section at the inlet and the third section at the outlet. In one embodiment, a continuous wick spanning an interior wall of the first second, second section and third section, said wick being capable of internally transporting liquid water along its length is provided.