Coal Combustion Residual Composite Shields for EMP Absorption
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Solution Overview
Problem
Existing structures lack effective protection against electromagnetic pulses (EMP), high-altitude electromagnetic pulses (HEMP), geomagnetic disturbances (GMD), and intentional electromagnetic interferences (IEMI), which can cause disruption and damage to critical infrastructure and electronics.
Innovation Solution
The use of coal combustion residuals (CCR) as a radiation-absorbing material to construct protective barriers and enclosures, combined with conductive meshes and layers, to absorb and reflect electromagnetic energy, thereby shielding structures from harmful emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional materials (soil, concrete, metal) are used for EMP shielding, then structural integrity is maintained, but electromagnetic energy absorption effectiveness is insufficient
Solution Approach 1:
The patent uses a composite material system consisting of coal combustion residuals (CCR) combined with conductive materials (such as copper, aluminum, or carbon-based materials). This composite structure leverages the unique properties of CCR (high carbon content, porosity) combined with conductive materials to achieve superior electromagnetic energy absorption compared to conventional single materials like soil or concrete alone.
Solution Approach 2:
The patent utilizes the porous nature of coal combustion residuals as a key feature for electromagnetic shielding. The voids and porous structure in CCR materials provide pathways for electromagnetic energy interaction and enhance the overall absorption effectiveness by increasing the surface area and allowing for better coupling with conductive materials.
2Object-affected harmful factors
If coal combustion residuals are used as radiation-absorbing material, then electromagnetic energy absorption is enhanced, but material composition complexity increases
Solution Approach 1:
The patent employs coal combustion residuals, which are waste products from coal combustion processes, as the primary radiation-absorbing material. This approach utilizes already-available industrial waste materials that require no additional processing or purification, thereby simplifying the overall system while achieving effective EMP shielding.
Solution Approach 2:
The patent modifies the physical and chemical parameters of coal combustion residuals by combining them with conductive materials and adjusting factors such as particle size, density, and composition ratios. These parameter changes enhance the electromagnetic absorption properties while maintaining the basic identity of CCR as the primary shielding material.
3Object-affected harmful factors
If conductive materials are added to enhance EMP protection, then electromagnetic shielding improves, but structural weight increases
Solution Approach 1:
The patent utilizes the porous structure of coal combustion residuals as a lightweight framework that can incorporate conductive materials without requiring dense, heavy structures. The voids in the porous material allow for the integration of conductive networks that provide electromagnetic shielding while maintaining overall structural lightness compared to traditional dense metal shielding.
Solution Approach 2:
The patent creates a composite material system where lightweight conductive materials (such as carbon-based materials, copper particles, or aluminum foils) are integrated with coal combustion residuals. This composite approach provides effective electromagnetic shielding through the synergistic interaction of conductive pathways within the porous CCR matrix, achieving protection with reduced weight compared to solid metal shielding.
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
CCR provides superior absorption of IEMI electromagnetic energy, offering enhanced protection against EMP, HEMP, and GMD, while maintaining structural integrity and functionality.
Implementation Method 1
CCR provides superior absorption of IEMI electromagnetic energy
Implementation Method 2
carbon containing materials for the purpose of absorbing and/or removing radio frequency energy
Implementation Method 3
combined with conductive meshes and layers, to absorb and reflect electromagnetic energy
Data Source
AI summary
An electromagnetic emission shield for protecting a facility has a volume containing coal combustion residue. The shield includes a carbon-based material positioned inside an interior space of the coal combustion residue proximate to and interposed between a potential source of electromagnetic emission and the facility. A casting arrangement for fabricating a structural panel for use in constructing an EMP-protective composite structure, includes an uninterrupted ferrous back panel having an inner side and an outer side. An edge form of side members is removably positioned around the uninterrupted ferrous back panel defining a perimeter. Studs are welded to the inner side of the uninterrupted ferrous back panel within the perimeter. Reinforcing members define a grid within the perimeter. A cementitious layer is poured on the inner side of the uninterrupted ferrous back panel in which the plurality of studs and the reinforcing members are embedded.