Microfluidic-based apparatus and method for vaporization of liquids
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Solution Overview
Problem
Conventional vaporizers lack precise control over vaporization temperature profiles and suffer from inefficiencies in thermodynamic performance, leading to variations in vapor quality and potential for undesirable chemical reactions.
Innovation Solution
The development of a microfabricated vaporization apparatus using batch fabrication techniques, featuring controlled fluid flow and heating elements integrated into a planar structure with micro-machined flow control structures, allowing for precise temperature control and efficient vaporization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional vaporization techniques are used, then vaporization can occur, but precise control over vaporization temperature profiles cannot be achieved
Solution Approach 1:
The vaporization apparatus divides the heating function into multiple independent heating zones along the flow channel, each with independently controllable heating elements. This segmentation allows precise control over temperature profiles at different locations, ensuring consistent vaporization temperature and vapor quality across the entire device.
Solution Approach 2:
The apparatus employs dynamically adjustable heating elements that can modify their heating output in real-time based on feedback from temperature sensors. This dynamic control enables maintenance of optimal vaporization temperature profiles under varying operating conditions, improving both temperature control precision and vapor quality consistency.
2Loss of energy
If conventional vaporizer designs are used, then vaporization can occur, but thermodynamic efficiency is poor
Solution Approach 1:
The flow channel is designed with a nested structure where the heating element is positioned within or adjacent to the liquid flow path, and insulation layers are nested around the heating zone. This nested arrangement minimizes thermal losses to the environment and ensures that energy is concentrated where needed, significantly improving thermodynamic efficiency.
Solution Approach 2:
The apparatus incorporates porous insulation materials with optimized thermal properties around the heating zones and flow channels. These porous materials provide thermal resistance to reduce heat loss while maintaining structural integrity, thereby reducing energy waste and improving overall thermodynamic efficiency of the vaporization process.
3Manufacturing precision
If conventional vaporizers are used, then vaporization can occur, but unit-to-unit variation in vapor quality is high
Solution Approach 1:
The apparatus incorporates precisely controlled geometric parameters in the flow channel design, including channel width, height, and curvature, all optimized through computational fluid dynamics analysis. These standardized parameters ensure that each manufactured unit exhibits identical flow characteristics and heat transfer properties, eliminating unit-to-unit variation and ensuring consistent vapor quality across production batches.
4Loss of energy
If conventional vaporizer designs are used, then vaporization can occur, but parasitic heat transfer is significant
Solution Approach 1:
The design extracts and isolates the heating zones from the main body structure using thermally insulating barriers and separated mounting configurations. This extraction minimizes parasitic heat conduction to surrounding components and housing, ensuring that heat is directed primarily into the liquid stream for efficient vaporization rather than being lost to unwanted thermal pathways.
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 enables well-controlled vaporization with reduced unit-to-unit variation, improved thermodynamic efficiency, and minimized parasitic heat transfer, resulting in consistent and high-quality vapor production.
Implementation Method 1
at least one heating element that is in thermal communication to the at least one vaporization port and at least one flow channel
Implementation Method 2
configured to vaporize liquid from a liquid source into the surrounding environment
Data Source
AI summary
Methods and apparatus for vaporizing liquid from a liquid source into the surrounding environment, are disclosed, where the apparatus comprises at least one manifold comprising at least one liquid port formed by a through-hole and at least one ridge structure, wherein the liquid port is in fluid communication with the liquid source and the one ridge structure At least one vaporization port is included in a planar structure connecting a first side of the structure to a second side, in fluid communication with the at least one ridge structure and the surrounding environment, wherein fluid flow through the liquid and vaporization ports is substantially perpendicular to the plane of the structure, and the ridge structures are substantially parallel to the plane of the structure. At least one heating element is present that is in thermal communication to the at least one vaporization port and at least one ridge structure.