Solid Oxide Fuel Cell Assembly for Gas Turbine Combustion Integration
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Solution Overview
Problem
Existing gas turbine engines face inefficiencies in energy conversion and emissions, particularly in aeronautical propulsion systems, where integrating fuel cells for improved efficiency and reduced emissions is challenging.
Innovation Solution
Incorporating a solid oxide fuel cell assembly within the gas turbine engine's combustion section, which generates electrical power through electrochemical reactions and directs partially oxidized fuel and air into the combustion chamber to enhance energy conversion and reduce emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a fuel cell assembly is integrated into the gas turbine engine's combustion section, then energy conversion efficiency is improved, but device complexity increases
Solution Approach 1:
The fuel cell assembly is integrated directly into the combustion section of the gas turbine engine, merging two separate systems (fuel cell and gas turbine) into a hybrid configuration. This allows the fuel cell to utilize partially oxidized fuel from the combustion section to generate electricity, while the exhaust gases from the fuel cell are directed back to the combustion section, creating a synergistic energy conversion system that improves overall efficiency.
2Object-generated harmful factors
If a solid oxide fuel cell assembly is integrated into the combustion section, then emissions are reduced, but manufacturing complexity increases
Solution Approach 1:
The fuel cell assembly is nested within the combustion section structure, with the fuel cell stack positioned to receive partially oxidized fuel and air from the combustion section. The exhaust from the fuel cell is directed back into the combustion section, creating a nested configuration where one system is integrated within another. This nesting approach reduces emissions by complete fuel oxidation in the fuel cell while utilizing existing engine structures to minimize manufacturing complexity.
3Power
If fuel cell assembly is integrated to improve energy conversion, then power output increases, but device complexity increases
Solution Approach 1:
The integrated fuel cell-gas turbine system performs multiple functions simultaneously: the fuel cell generates electricity from partially oxidized fuel, the combustion section burns exhaust gases from the fuel cell to produce mechanical work, and the system recovers energy that would otherwise be wasted. This multi-functionality increases power output while sharing common structures and fluid pathways between the two systems, thereby limiting the increase in device complexity.
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 integration of a solid oxide fuel cell assembly improves energy conversion efficiency and reduces emissions by leveraging electrochemical energy generation and optimizing combustion processes, enhancing overall engine performance.
Implementation Method 1
generates electrical power through electrochemical reactions
Implementation Method 2
directs partially oxidized fuel and air into the combustion chamber to enhance energy conversion
Data Source
AI summary
A method for operating a fuel cell assembly, the fuel cell assembly including a fuel cell stack having a solid oxide fuel cell, the solid oxide fuel cell having an anode, a cathode, and an electrolyte, the method including: determining a temperature setpoint for the fuel cell stack, for output products of the fuel cell stack, or both; and controlling a volume of oxidant provided to the anode in response to the determined temperature setpoint to control a temperature of the fuel cell stack, a temperature of the output products of the fuel cell stack, or both.