Cylindrical Reformer Body with Rough Surface for Fuel Cell Efficiency
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Solution Overview
Problem
Existing fuel cell reformers face inefficiencies in generating hydrogen-containing gas for solid oxide fuel cells due to uneven distribution of reforming catalysts and incomplete reforming reactions, leading to reduced power generation efficiency and potential carbon deposition.
Innovation Solution
A cylindrical reformer body with a vaporization portion and a reforming portion, featuring partition walls with flow permission areas to enhance catalyst contact and thermal efficiency, along with convex and rough surface features to increase heat absorption and radiation, ensuring efficient steam reforming of raw fuel gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional smooth-walled reformer bodies are used, then manufacturing is simple, but heat absorption and radiation efficiency is poor leading to incomplete reforming reactions
Solution Approach 1:
The reformer body incorporates localized surface irregularities (convex portions and rough portions) at specific locations rather than making the entire surface irregular. This allows the reformer body to maintain simple manufacturing processes while creating localized zones that enhance heat absorption and radiation efficiency, thereby improving reforming reaction efficiency without significantly complicating manufacturing.
Solution Approach 2:
The rough portions on the reformer body surface create a micro-structure that increases surface area and enhances heat transfer capabilities. This porous-like surface structure improves heat absorption from combustion gases and heat radiation to the reforming catalyst, thereby improving reforming reaction efficiency while maintaining a relatively simple overall reformer body structure.
2Ease of manufacture
If reforming catalysts are uniformly distributed, then catalyst application is simple, but catalyst contact with raw fuel gas is insufficient leading to incomplete reforming
Solution Approach 1:
The reformer body creates localized zones with enhanced catalyst contact capability through convex portions and rough portions. These localized structures concentrate catalyst and raw fuel gas interaction at specific locations, improving catalyst contact efficiency without requiring complex catalyst distribution patterns or application methods.
Solution Approach 2:
The surface irregularities (convex and rough portions) add a dimensional aspect to catalyst placement, creating three-dimensional catalyst zones rather than simple two-dimensional surface coating. This dimensional enhancement increases the effective contact area between catalyst and raw fuel gas, improving reforming efficiency while maintaining relatively simple catalyst application processes.
3Temperature
If the reformer body has large surface area for heat exchange, then thermal efficiency is improved, but the reformer body size and complexity increase
Solution Approach 1:
Instead of making the entire reformer body surface irregular to increase heat exchange area, the invention applies surface irregularities (convex and rough portions) only at localized positions. This localized approach increases thermal efficiency by enhancing heat absorption and radiation at critical locations while avoiding the complexity and size increase that would result from making the entire surface irregular.
Solution Approach 2:
The invention applies partial surface irregularity enhancement rather than complete surface modification. By creating convex and rough portions only at specific locations where heat exchange is most critical, the reformer achieves improved thermal efficiency without the excessive complexity and size increase that would result from making the entire reformer body surface irregular.
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 improves the efficiency of hydrogen gas generation, reduces carbon deposition, and enhances power generation by ensuring complete reforming reactions, thus increasing the durability and efficiency of fuel cell operation.
Implementation Method 1
a vaporization portion (3) which generates steam
Implementation Method 2
a reforming portion (5) which reacts the steam generated in the vaporization portion (3) with the raw fuel gas to generate a reformed gas
Implementation Method 3
At least one of a convex portion (27) and a rough portion (28), the rough portion having a higher degree of surface roughness than that of other portions, is disposed on at least one of an inner circumferential surface (25) and an outer circumferential surface (26) of the reformer body (2)
Data Source
AI summary
A reformer of the present disclosure includes a reformer body having a cylindrical shape that carries out a reforming reaction by a raw fuel gas and water supplied thereto, the reformer body including therein a vaporization portion which generates steam and a reforming portion which reacts the steam generated in the vaporization portion with the raw fuel gas to generate a reformed gas, at least one of a convex portion and a rough portion having a higher degree of surface roughness than that of other portions, being disposed on at least one of an inner circumferential surface and an outer circumferential surface of the reformer body.