Coronal Discharge Reformer for VTOL Hydrogen Generation
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Solution Overview
Problem
Current aircraft propulsion systems relying on internal combustion engines face challenges with energy density, safety, and environmental impact due to fossil fuel emissions and dependencies, while hydrogen fuel requires heavy vessels or cooling, and hydrogen-derived fuels like methanol cannot be used directly in fuel cells without processing.
Innovation Solution
A compact, lightweight Coronal Discharge Reformer converts liquid methanol into hydrogen using a plasma process within a two-part polymer housing with spinning electrodes and a magnetic field, producing hydrogen for use in fuel cells without moving parts or cooling, supported by a rechargeable battery for energy supplementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If hydrogen is used as fuel in pure molecular form, then clean and efficient energy production is achieved, but heavy pressure vessels or cryogenic cooling systems are required
Solution Approach 1:
The patent changes the physical state and chemical form of hydrogen by converting it from pure molecular hydrogen (requiring pressure/cooling) to hydrogen-bearing liquid fuel (methanol) that can be stored under ambient conditions, then reforming it back to hydrogen at the point of use
Solution Approach 2:
The patent introduces methanol as an intermediary substance that bridges the gap between easy-to-store liquid fuel and clean hydrogen energy, allowing hydrogen to be transported and stored in liquid form and then converted to gaseous hydrogen when needed
2Ease of operation
If methanol is used as fuel, then easy storage and handling under standard conditions is achieved, but direct use in hydrogen fuel cells is not possible without further processing
Solution Approach 1:
The patent extracts hydrogen from methanol through a reforming process, separating the useful hydrogen component from the carbon-containing byproducts, which are then removed from the system
Solution Approach 2:
The patent replaces complex mechanical compression and cooling systems with a chemical reforming process that converts liquid methanol into gaseous hydrogen through controlled chemical reactions in a reformer unit
3Reliability
If internal combustion engines are used for propulsion, then reliable and affordable power is achieved, but harmful emissions and environmental pollution occur
Solution Approach 1:
The patent converts the harmful carbon-containing byproducts of methanol reforming into useful hydrogen fuel, while the only exhaust is water vapor, transforming a potentially harmful chemical process into an environmentally beneficial energy production method
Solution Approach 2:
The patent uses controlled oxidation reactions in the reformer to efficiently convert methanol into hydrogen, and uses the oxygen from air in the fuel cell to complete the oxidation of hydrogen to water, creating a clean energy cycle
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 enables efficient, environmentally friendly hydrogen production for VTOL aircraft propulsion, ensuring reliable operation and energy supply during peak loads, with a compact, high-reliability design suitable for various aircraft applications and modular configurations.
Implementation Method 1
A plasma is produced between the two electrodes. The reformer as shown in Figures 1 and 2 has no moving parts.
Implementation Method 2
The insulator prohibits a flow of electricity between the two electrodes leading to a coronal discharge plasma, when voltage is applied to the electrodes.
Implementation Method 3
A magnetic field of the ring magnet spins the plasma rapidly, thereby maximizing the cross section of the plasma that comes in contact with a vaporized mixture of methanol and water
Implementation Method 4
The hydrogen and by-products exit the reformer through the Outlet. After exiting the reformer, the hydrogen is then filtered from the by-products and supplied to a hydrogen fuel cell
Data Source
Figure 1~2
Figure 3~4
AI summary
The disclosure generally pertains a vertical take-off and landing (VTOL) aircraft comprising a hydrogen fuel-cell system and at least one reformer to generate a fuel for the hydrogen fuel-cell. The reformer may use a plasma to reform a mixture of methanol and water carried by an airstream and to produce hydrogen for the fuel-cell.