Modular Stack Compression for Membrane Sealing Integrity
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Solution Overview
Problem
Membrane-based desalination systems face challenges in sealing compartments to prevent leakage and buckling, as increased compression force to prevent leakage can lead to structural damage and membrane failure, especially in longer stacks.
Innovation Solution
A modular stack design with internal and end modules, each having rigid end plates to align and compress gasket separators and membranes, applying lower compressive force individually to prevent membrane failure and buckling, while allowing incremental assembly and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If increased compression force is applied to seal compartments and prevent leakage, then sealing effectiveness is improved, but membrane structural integrity deteriorates leading to membrane failure and buckling
Solution Approach 1:
The stack is divided into multiple individual modules, each with its own compression system. This segmentation allows each module to be compressed independently with lower forces, preventing membrane failure while maintaining effective sealing in each compartment. The modular design distributes the compression load across multiple smaller units rather than applying excessive force to a single large stack.
2Reliability
If higher compression force is applied to prevent leakage, then sealing performance is improved, but device complexity increases due to need for stronger structural support
Solution Approach 1:
Dividing the system into modular units simplifies the structural support requirements for each module. Each module needs only modest structural reinforcement to handle lower compression forces, rather than requiring the entire large stack to support extremely high compression loads. This segmentation reduces overall device complexity while maintaining sealing performance.
3Ease of operation
If modular design is implemented to reduce compression force, then ease of assembly and handling is improved, but device complexity increases due to multiple modules
Solution Approach 1:
The segmentation into modular units directly improves ease of assembly and handling. Each module can be assembled, tested, and handled as a manageable unit, then combined with other modules to form the complete system. This approach makes the overall system easier to assemble and maintain despite having multiple components.
Solution Approach 2:
Multiple identical or similar modules are combined to form the complete stack system. This merging approach allows standardized components to be replicated and assembled in series, simplifying the assembly process through repetition rather than requiring custom integration of unique parts. The modular units can be manufactured using the same processes and then systematically combined.
Data Source
AI summary
The present disclosure is directed at a compression device for compressing a stack to prevent leaks and at an apparatus including the stack and the compression device. The stack includes a pair of rigid end plates located at opposing ends of the stack, a plurality of membrane bounded compartments layered between one of the rigid end plates and the other of the rigid end plates and fluid manifolds extending through the membrane bound compartments. The compression device is fixedly coupled to opposing ends of the pair of rigid end plates and includes compression members movable to compress one of the rigid end plates towards the other of the rigid end plates. The compression members are positioned to apply force to the stack in the vicinity of the fluid manifolds.