Solid Oxide Fuel Cell Bundle Flexible Power Transmission
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Solution Overview
Problem
Current fuel cell technologies face challenges in adapting to mobile applications due to complexity in assembly, non-uniform fuel reformation leading to thermal stresses, and the need for external reformers, which increases weight and reduces efficiency.
Innovation Solution
A multi-function fuel cell bundle integrating oxidant and fuel supply systems, a fully distributed fuel reformation system, and a support structure to provide a modular, easily assembled unit capable of withstanding physical and thermal shocks, with flexible power distribution for mobile applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If external reformers are used to supply reformation heat to fuel cells, then fuel reformation can be achieved, but the weight increases and efficiency decreases
Solution Approach 1:
The patent combines the fuel cell and reformer into a single integrated unit, eliminating the need for separate external reformers. The fuel cell stack directly performs reformation of hydrocarbon fuels internally, reducing overall system weight and improving efficiency by eliminating heat transfer losses between separate components.
Solution Approach 2:
The fuel cell stack is designed to perform multiple functions: it generates electricity through electrochemical reactions and simultaneously reforms hydrocarbon fuels. This multi-functionality eliminates the need for dedicated external reforming equipment, reducing system weight and improving overall efficiency.
2Productivity
If non-uniform fuel reformation is performed, then fuel conversion occurs, but thermal stresses are generated
Solution Approach 1:
The patent implements uniform fuel distribution across all fuel cells in the stack through optimized fuel injection systems and flow management. This ensures that each cell receives consistent fuel supply, leading to uniform reformation rates and minimizing thermal stress concentrations that would arise from localized hot spots or cold zones.
Solution Approach 2:
The system performs preliminary fuel distribution optimization before reformation occurs, ensuring uniform fuel delivery to all cells. This preliminary action prevents the formation of thermal stress gradients by establishing consistent reformation conditions across the entire stack from the start of operation.
3Adaptability or versatility
If complex assembly structures are used to integrate support functions, then functionality is improved, but assembly time and costs increase
Solution Approach 1:
The patent integrates multiple support functions including fuel injection, oxidant supply, and electrical connections directly into the fuel cell stack structure itself. This merging of functions into a unified modular design eliminates the need for separate external components and complex interconnections, significantly reducing assembly time and costs while maintaining full functionality.
Solution Approach 2:
The fuel cell system is divided into modular stack units that can be independently assembled and then combined. Each module contains integrated support functions, allowing for simplified assembly through standardized interfaces and reducing the overall complexity of system integration.
4Reliability
If rigid power transmission systems are used, then power transmission is stable, but flexibility for mobile applications is reduced
Solution Approach 1:
The patent employs flexible power transmission components such as flexible cables or ribbons that can dynamically adapt to movement and vibration while maintaining reliable electrical connections. These flexible components replace rigid conductors, enabling the system to withstand the dynamic conditions of mobile applications without compromising power transmission stability.
Solution Approach 2:
The power transmission system uses flexible cable assemblies with multiple thin conductive layers that can bend and flex while maintaining electrical continuity. This flexible construction allows the system to accommodate movement and vibration in mobile applications while preserving reliable power transmission.
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 integrated fuel cell bundle reduces assembly time and costs, ensures uniform fuel distribution, minimizes thermal stresses, and enhances efficiency by eliminating the need for external reformers, making it suitable for mobile applications.
Implementation Method 1
A fuel cell combines fuel and air in an electrochemical reaction that produces both electricity and heat
Implementation Method 2
During steam reformation, water is heated to a high temperature to form steam which is then mixed with the hydrocarbon fuel. The water/steam (H2O) provides a source of oxygen that combines with the carbon in the hydrocarbon, to form CO2 and CO. Thus, the reformation process produces CO2, CO, and hydrogen
Implementation Method 3
The electrodes are good electrical conductors (i.e., have minimal resistance) and may also act as catalysts to increase the rate of the electrochemical reaction within the fuel cell
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A fuel cell assembly comprising: a plurality of fuel cell bundles, each fuel cell bundle comprising: an array of elongated tubular fuel cells comprising a plurality of rows of spaced apart, elongated tubular fuel cells; a plurality of elongated electrical connectors each having a first contact for coupling with a first fuel cell and a second contact for coupling with a second fuel cell and wherein each of said electrical connectors is disposed between at least two of said elongated tubular fuel cells; an oxidant supply system; a fuel supply system; and a support structure for integrating as a bundle said fuel cells, said oxidant supply system and said fuel supply system, wherein said support structure comprises an elongated tubular fuel cell support/spacer plate and an oxidant feed tube support/spacer plate; wherein the elongated tubular fuel cell support/spacer plate is spaced from and connected to the oxidant feed tube support/spacer plate by one or more first pin-in-sleeve combinations each of which is connected to a first side of the elongated tubular fuel cell support/spacer plate and to a first side of the oxidant feed tube support/spacer plate.