Fuel Processor Mantel Space Preheating via Reversing Air Flow
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Solution Overview
Problem
Existing fuel processors face challenges in achieving rapid and efficient preheating and temperature regulation, with heating catalysts like copper, iron, or zinc increasing weight and not adequately bringing the reformer section to operating temperatures within a reasonable time, and requiring complex oxidizing/deoxidizing gas supply systems.
Innovation Solution
A fuel processor design with an inner and outer housing and a mantel space, utilizing a heat transporting fluid like air that reverses flow direction for preheating, eliminating the need for additional insulation and gas discharge systems, and incorporating heat exchangers to efficiently transfer heat and maintain temperature gradients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heating catalysts (copper, iron, zinc) are used to preheat the reformer section, then heat generation occurs through oxidation, but the overall weight of the fuel reformer increases and the heat production is insufficient to reach operating temperatures quickly
Solution Approach 1:
The invention removes the heating catalysts (copper, iron, zinc) from the system entirely. Instead of using these catalysts to generate heat through oxidation in the double-layered insulation structure, the patent extracts this function and replaces it with an external heat source that supplies hot gas to the reformer section, thereby reducing the overall weight while achieving the required heating effect
Solution Approach 2:
The invention introduces hot gas as an intermediary medium to transfer heat to the reformer section. Rather than relying on the heating catalysts to directly generate heat through oxidation, the system uses an external heat source to heat a gas, which then acts as a carrier to deliver thermal energy to the reformer section, achieving more efficient and controllable heating
2Temperature
If heating catalysts are used to generate heat through oxidation, then preheating occurs, but the system requires complex oxidizing/deoxidizing gas supply and discharge systems
Solution Approach 1:
The invention extracts and removes the complex gas supply and discharge system required for operating heating catalysts. By eliminating the catalysts themselves, the system no longer needs oxidizing gas supply pipes, deoxidizing gas supply, and discharge pipes for air and deoxidizing gas, significantly simplifying the overall system architecture
Solution Approach 2:
The invention uses hot gas as an intermediary heat transfer medium that eliminates the need for complex gas management systems. Instead of using gas reactions (oxidation/deoxidization) to generate and control heat, the system introduces pre-heated gas as a simple thermal carrier, replacing the complex chemical control system with a straightforward thermal transfer process
3Temperature
If heating catalysts are used, then heat generation occurs, but the heat production is insufficient to bring the reformer section to operating temperatures within an acceptable time period
Solution Approach 1:
The invention introduces hot gas as an intermediary heat transfer medium that delivers concentrated thermal energy to the reformer section. This external hot gas source provides much higher heat flux than the catalyst oxidation reactions, enabling the reformer section to reach operating temperature of 800°C within an acceptable start-up time
Solution Approach 2:
The system performs preliminary heating by pre-heating the gas that will be introduced to the reformer section. This preliminary action ensures that when the hot gas contacts the reformer section, immediate and intense heat transfer occurs, dramatically reducing the time required to reach operating temperature compared to relying on in-situ catalyst oxidation
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 design allows for fast and effective preheating, reduces weight and costs, and efficiently regulates temperature, enabling the fuel processor to reach operating temperatures quickly and maintain them consistently.
Implementation Method 1
Into the mantel space a heat transporting fluid, preferably air, is introduced. The heat transporting fluid streams from its inlet near the fuel processor outlet to fluid connection openings in the inner housing, which are arranged near the fuel processor inlet
Implementation Method 2
The heat transporting fluid enters the inner housing through the fluid connection openings, mixes with hydrocarbon fuel and streams down to the fuel processor outlet inside the inner housing along with the reformed hydrogen rich gas
Implementation Method 3
incorporating heat exchangers to efficiently transfer heat and maintain temperature gradients
Data Source
AI summary
A fuel processor for generating hydrogen rich gas or cleaned hydrogen rich gas from hydrocarbon fuel includes an inner housing and an outer housing defining a mantel space between them, wherein at least one fuel reformer unit for reforming hydrocarbon fuel to a hydrogel rich gas and optionally a gas-cleaning unit for cleaning the hydrogen rich gas from unwanted by-products are arranged in the inner housing. The fuel processor further includes a processor inlet for introducing hydrocarbon fuel into the inner housing and a processor outlet for releasing cleaned hydrogen rich gas from the inner housing. The outer housing further includes a fluid inlet for introducing a heat transporting fluid into the mantel space. The inner housing includes at least one opening for providing a fluid-connection between the inner housing and the mantel space. A method for operating such a fuel processor is also provided.