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Soil Cooling System for Wildfire Prevention(SCS-WP)

Year: 2025
Type: article
Abstract: Invention Title: Passive-Active Geothermal Cooling and Hydration Barrier for Wildfire Prevention (PAG-CHB) Abstract The Passive-Active Geothermal Cooling and Hydration Barrier (PAG-CHB) is a subsurface infrastructure system designed to preemptively prevent the ignition and spread of wildfires. It creates a permanent, self-sustaining "hydrated firebreak" beneath the surface. The system ingeniously combines passive geothermal cooling with optional active pumping in a single, simplified design. By circulating water through a buried network of porous pipes, it simultaneously lowers soil temperature and increases moisture content, making the ground and its vegetation highly resistant to combustion. Its modular design allows for rapid, large-scale deployment using commonly available materials and machinery. 1. Central Idea & Key Enhancement The PAG-CHB moves beyond mere soil cooling to create a dynamic, "Subsurface Hydration Shield." Its goal is to render the fuel (dry vegetation and organic matter) in a target area non-flammable by maintaining a cool, moist root zone and soil surface. The key enhancement is its Dual-Mode Passive/Active operation, which ensures functionality with or without external power, making it both resilient and adaptable to various environments and budgets. Key Enhancement over SCS-WP: The Integrated Geothermal Heat Siphon and Moisture Diffusion Core. 2. Mechanism of Action & Simplified Components The system's robustness comes from its simple, interlinked components that work in harmony with the natural environment: 1. Subsurface Hydration Network (The Shield): · Components: A modular grid of specialized porous pipes (e.g., PVC pipes with laser-drilled micro-holes or standard seep hoses) buried at a shallow depth (30-50 cm). · Layout: The grid can be deployed in critical patterns: · Linear Barriers: Along roads, property perimeters, and ridges. · Zone Protection: Around communication towers, substations, and vulnerable communities. · Grid Patterns: Throughout high-risk forested areas. · Simplicity: The piping is lightweight, modular, and can be unrolled and buried using standard trenching equipment, enabling rapid installation. 2. The Geothermal Cooling and Hydration Core (The Engine): · This is the core innovation for simple and sustained operation. · Passive Mode (Constant, Zero-Energy Operation): · The network is connected to one or more "Geothermal Cooling Columns" – vertical shafts filled with a gravel-packed matrix that house a central porous pipe. · The deep soil (below 4-5 meters) maintains a constant, cool temperature year-round. This temperature differential creates a natural "heat siphon." · Water slowly circulates due to thermosiphon principles: warmer water in the shallow grid rises back to the cooling column, cools down in the deep earth, and sinks, creating a continuous, passive loop. This constantly removes heat from the surface soil. · Active Mode (On-Demand Boost): · For critical periods of extreme fire danger (low humidity, high winds, heatwaves), a small, solar-powered pump is activated. · This pump intensifies the water flow through the grid, providing a massive "hydration boost" to the soil, creating a powerful and immediate vapor barrier against advancing fires. · The pump is only used when needed, conserving energy and water. 3. Integrated Water Management System: · Rainwater Harvesting: The system is primarily designed to be filled with collected rainwater and stormwater runoff, stored in simple, buried bladders or tanks. This makes it a water-positive solution. · Superabsorbent Polymer (SAP) Dosing: A key simplification. A cartridge of slow-release, non-toxic water-retaining polymers is installed at the inlet. These polymers absorb and release water repeatedly, significantly reducing the total water volume required and extending the system's effectiveness between rain refills. The soil remains moist for weeks, not just days. 4. Autonomous Control & Power: · Sensors: Wireless, buried sensors monitor soil moisture and temperature. · Controller: A simple, solar-charged microcontroller compares this data to local weather forecast data (via cellular or satellite link). If conditions predict extreme fire risk, it automatically activates the "Active Mode" pump, making the system fully autonomous and predictive. 3. Practical Applications & Instant Usability The PAG-CHB is designed for large-scale, strategic deployment: · Critical Infrastructure Protection: Encircling power substations, mobile towers, and historical sites with an impenetrable, hydrated underground barrier. · Community Firebreaks: Creating wide, hydrated zones on the outskirts of towns and villages where back-burning is often performed. This makes back-burning safer and more effective. · Forest Management: Installed along fire trails and access roads to create natural fire containment lines that firefighters can rely upon. · Agricultural Protection: Protecting orchards and valuable crops from wildfire encroachment. 4. Summary of Advantages for Proactive Fire Prevention · Prevents Ignition at the Source: By keeping the ground fuel (grass, litter, roots) cool and moist, it removes the primary fuel for wildfires. · Simple and Scalable Construction: Uses standard, low-cost civil engineering materials (pipes, trenches, reservoirs) and techniques. · Dual-Mode for Resilience: Works 24/7 without power using passive geothermal cooling, with an active boost for emergencies. · Water and Energy Efficient: Harvests free rainwater and uses solar power. The SAP polymers drastically reduce water consumption. · Creates a Living Firebreak: The hydrated soil supports healthier, greener vegetation that acts as a natural fire retardant, strengthening the system over time. · Long-Term Solution: Once installed, it requires minimal maintenance and operates for decades, providing permanent protection.
DOI: 10.5281/zenodo.17196175
Author: Sajedi, Asal
Language: English
Open Access status: green
OpenAlex ID: W7083198014
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