Modular Recuperator for Scalable SCO2 Brayton Cycle
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Solution Overview
Problem
Conventional heat exchangers in power plants using the Brayton cycle are not easily scalable, which disrupts the system when attempting to increase capacity, and are not robust enough to handle high temperatures and pressures in supercritical carbon dioxide (SCO2) power generation systems.
Innovation Solution
A power generation system with high and low temperature recuperators featuring matrix panels interconnected in a counterflow and stair-step configuration, made from fiber-reinforced ceramic matrix materials, allowing for modular construction and easy scalability, with geometrically shaped fluid channels and turbulence-enhancing wall configurations to ensure efficient heat transfer and fluid separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional heat exchangers are used in SCO2 Brayton cycle power plants, then the system can operate at moderate temperature and pressure ranges, but the heat exchangers are not robust enough to handle high temperatures and pressures and are not easily scalable
Solution Approach 1:
The heat exchanger is divided into multiple modular units that can be independently manufactured and assembled. Each module contains a standardized configuration of channels and walls, allowing the overall heat exchanger capacity to be scaled by adding or removing modules without redesigning the entire system.
Solution Approach 2:
The heat exchanger walls are constructed using composite materials that combine high-temperature ceramics with metal reinforcement structures. This composite construction provides both the thermal stability needed for high-temperature SCO2 operation and the mechanical strength required for high-pressure reliability.
2Reliability
If the heat exchanger is designed for high temperature and pressure operation, then reliability improves, but manufacturing complexity and cost increase
Solution Approach 1:
By segmenting the heat exchanger into standardized modules, each module can be manufactured using the same high-cost, high-reliability materials and construction methods. This amortizes the manufacturing complexity across multiple identical units rather than requiring a single complex custom design.
Solution Approach 2:
The modular design creates universal building blocks that can be used in various configurations and scales. The same basic module design serves multiple functions and can be applied across different plant sizes, reducing overall manufacturing complexity through standardization.
3Productivity
If the system is scaled up to increase power generation capacity, then productivity increases, but conventional heat exchangers require system disruption and redesign
Solution Approach 1:
The modular architecture allows power generation capacity to be scaled by simply adding more heat exchanger modules in parallel or series configurations. The standardized interface designs enable straightforward integration without requiring redesign of the overall system architecture.
Solution Approach 2:
Multiple heat exchanger modules can be nested or stacked together in a compact arrangement, allowing capacity expansion within a confined space. The modules can be physically nested or arranged in hierarchical configurations that optimize space utilization while maintaining scalability.
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 design enables robust, scalable, and cost-effective heat exchange systems that maintain efficient heat transfer and prevent fluid leakage, supporting high-pressure SCO2 power plants with minimal system redesign and reduced manufacturing costs.
Implementation Method 1
The heat exchanger as a recuperator pre heat the working fluid before it is introduced to combustion chamber
Implementation Method 2
hot fluid channels and cold fluid channels arranged adjacent to each other in a counterflow and stair-step configuration
Implementation Method 3
The matrix panels may have a wall configuration that includes one of at least ribs, dimples and a roughed surface to create turbulence
Data Source
AI summary
A power generation system includes a turbine having an outlet. A high temperature recuperator has an inlet and is connected to the turbine outlet. A low temperature recuperator is connected to the high temperature recuperator. Each of the high and low temperature recuperators include a plurality of matrix panels interconnected together that define hot fluid channels and cold fluid channels arranged adjacent to each other in a counterflow and stair-step configuration. A compressor is connected to the low temperature recuperator and turbine.