GravBatt
Using gravity to store energy
Author: Guilherme ViottiCreated: Oct. 30, 2024, 2 p.m. | Edited:
Solution Type: infrastructure
Cost type: $$$ - Between USD 50.000 and USD 500.000
Total cost: 386,345.00
Goal: GravBatt aims to create a sustainable energy storage solution by harnessing the power of gravitational energy through an innovative use of existing underground structures, such as old mine shafts or wells. The concept leverages energy generated when a heavy weight is slowly lifted to the top of a vertical or inclined structure; this stored potential energy is released when the weight is allowed to descend, driving a motor that generates electricity. GravBatt addresses the intermittency challenge of renewables like solar and wind by providing a reliable backup energy source, reducing dependency on fossil fuels and helping achieve global carbon reduction goals. By repurposing old mining sites or suitable geological structures, GravBatt also promotes the reutilization of land for sustainable development without impacting surface-level ecosystems.
RATING
CLASSIFICATION
Dimension Target: house complexneighborhoodtowncitycountystatecountryUN Target: affordable and clean energysustainable cities and communitiesresponsible consumption and productionclimate action
Sector: energy
ASSETS
Reference GravitricityWorking example DIY gravity battery
How this solution can be updated:
To modernize the GravBatt system, integrating IoT sensors and advanced analytics would allow for real-time monitoring of the structural and mechanical integrity of the pulleys, weights, and motor. Sensors would gather data on weight stress, depth positions, temperature variations, and motor performance, allowing predictive maintenance to reduce downtime and prevent damage to equipment. AI algorithms could adjust operational parameters to optimize the balance between energy storage and retrieval based on demand patterns. Additionally, a blockchain-enabled digital interface could help with grid integration and record transparent energy transactions, enhancing the operational efficiency and transparency of the GravBatt system.
How this solution can be upgraded:
Future upgrades to GravBatt could focus on expanding its storage capacity and improving efficiency. This could include the incorporation of additional weights to increase gravitational potential or the integration of modular storage systems for greater scalability. Additionally, the use of lightweight yet durable materials for the pulley and structural components can ensure longevity while reducing strain on the system. Implementing advanced motor technology or regenerative braking systems can further increase the energy generated during descent. As part of the upgrade, an energy management algorithm could dynamically adjust the speed of the weight descent to align with grid demand, enhancing the efficiency and energy output of the system.
How this solution can scale up:
GravBatt can scale by identifying and partnering with stakeholders who own unused vertical infrastructure, such as old mines, quarries, or deep wells, for adaptation into gravity storage sites. Establishing public-private partnerships can further enable rapid adoption, while government incentives for renewable energy storage can attract investors. By partnering with energy utility companies, GravBatt can be integrated into the grid infrastructure as a backup storage solution, offering energy access to rural or off-grid areas. Expanding into regions with high renewable energy penetration can also increase demand for GravBatt installations as a balancing system, offering a flexible, scalable solution to meet varying energy demands globally.
LIFE CYCLE
BUILD
Construction
Description: The construction phase involves retrofitting or reinforcing an existing vertical or inclined structure (such as an old mine shaft) to support the GravBatt system. This includes installing the weight and pulley systems, reinforcing the shaft walls, and setting up the motor and energy conversion mechanisms at the surface. Site-specific modifications are made to ensure that the structural integrity can withstand the weight’s gravitational force and the stress generated during the lifting and descent operations. Safety and regulatory compliance checks are conducted to meet local and environmental standards, with attention to structural resilience and accessibility for future maintenance.
Total cost: 259,900.00
Type: Material
Unit: Metric tons
Quantity: 50
Ref. unit cost: 1,200.00
Total cost: 60,000.00
Notes: Used for reinforcing the shaft walls and supporting the weight structure.
Input: Heavy-Duty Pulley System
Type: Material
Unit: Units
Quantity: 3
Ref. unit cost: 5,000.00
Total cost: 15,000.00
Notes: Pulleys are specialized for lifting extremely heavy weights slowly to maximize energy efficiency.
Input: Electric Motor
Type: Material
Unit: Units
Quantity: 1
Ref. unit cost: 10,000.00
Total cost: 10,000.00
Notes: Motor is optimized for energy-efficient weight lifting and descent control.
Input: Construction Crew Labor
Type: Human
Unit: Person-hours
Quantity: 3000
Ref. unit cost: 50.00
Total cost: 150,000.00
Notes: Skilled labor needed for setting up structural support, pulleys, and motor systems.
Input: Sensors and IoT Equipment
Type: Material
Unit: Units
Quantity: 20
Ref. unit cost: 200.00
Total cost: 4,000.00
Notes: Used for tracking structural integrity and monitoring performance throughout the project lifecycle.
Input: Concrete for Foundation and Support
Type: Material
Unit: Cubic meters
Quantity: 200
Ref. unit cost: 100.00
Total cost: 20,000.00
Notes: Required to provide a solid base for the pulley and motor systems.
Reusable
Recyclable
Unit: Metric tons
Quantity: 10
Ref. unit cost: 50.00
Total cost: 500.00
Destination method: Transported to a recycling facility.
Notes: Concrete and steel scrap
Waste: Packaging Materials
Recyclable
Unit: Kg
Quantity: 300
Ref. unit cost: 1.00
Total cost: 300.00
Destination method: Sent to recycling centers after unpacking equipment
Notes: Cardboard and plastic from equipment
Waste: Metal Shavings
Recyclable
Cradle 2 cradle
Unit: Kg
Quantity: 100
Ref. unit cost: 1.00
Total cost: 100.00
Destination method: Recycled into new construction materials.
Notes: Scrap metal from installation processes
OPERATION
Operational
Description: In the operational phase, GravBatt will function as an energy storage and release system that can be activated based on energy demands. Regular system maintenance includes inspecting the pulley systems, reinforcing weight balance, and calibrating the motor to maximize efficiency. IoT sensors installed on key components track system performance, environmental impact, and any wear-and-tear, while an automated system adjusts the weight’s position to optimize energy storage and output. Software updates to the energy management system ensure continued alignment with grid demand, while predictive maintenance is conducted as needed to ensure operational consistency.
Total cost: 73,195.00
Type: Material
Unit: Kits per year
Quantity: 12
Ref. unit cost: 500.00
Total cost: 6,000.00
Notes: Includes lubricants, screws, and belts for pulleys and motor maintenance.
Input: Technician Labor
Type: Human
Unit: Person-hours
Quantity: 1000
Ref. unit cost: 60.00
Total cost: 60,000.00
Notes: 1000 annually. Ongoing maintenance to ensure optimal operation and quick repairs
Input: Energy Monitoring Software License
Type: Service
Unit: Anual subscription
Quantity: 1
Ref. unit cost: 2,000.00
Total cost: 2,000.00
Notes: Software for real-time tracking and performance analytics, with integration for remote access.
Input: Data Management System Upgrade
Type: Service
Unit: Service contract per year
Quantity: 1
Ref. unit cost: 5,000.00
Total cost: 5,000.00
Notes: Periodic upgrades for the AI predictive maintenance system and data handling.
Unit: Liter per year
Quantity: 50
Ref. unit cost: 1.00
Total cost: 50.00
Destination method: Sent to a hazardous waste processing facility for recycling.
Notes: Oil-based lubricants
Waste: Worn Out Pulleys and Belts
Recyclable
Cradle 2 cradle
Unit: Units per year
Quantity: 3
Ref. unit cost: 15.00
Total cost: 45.00
Destination method: Disposed of through an industrial recycler.
Notes: Metal and rubber components
Waste: Sensor and IoT Waste
Recyclable
Unit: Unit per year
Quantity: 5
Ref. unit cost: 20.00
Total cost: 100.00
Destination method: Electronics recycler with certifications for proper e-waste handling.
Notes: Electronics
END OF LIFE
Decommissioning Phase
Description: The decommissioning phase involves safely dismantling the GravBatt system, including removal of weights, pulley structures, and the motor. Reusable materials, such as weights and structural supports, are either recycled or redirected for future use, while non-reusable components are disposed of per environmental guidelines. The existing shaft or structure is then either closed, returned to a natural state, or prepared for an alternative, approved purpose. Waste generated in this phase is minimized, with a focus on environmental sustainability and adherence to local regulations, ensuring that minimal ecological impact occurs post-decommissioning.
Total cost: 53,250.00
Type: Human
Unit: Person-hours
Quantity: 500
Ref. unit cost: 70.00
Total cost: 35,000.00
Notes: Labor for disassembly, transportation, and site restoration.
Input: Heavy Machinery Rental
Type: Service
Unit: Day
Quantity: 10
Ref. unit cost: 1,500.00
Total cost: 15,000.00
Notes: Equipment required for safely dismantling the weight and pulley system.
Input: Transport for Waste Removal
Type: Service
Unit: Truckloads
Quantity: 5
Ref. unit cost: 500.00
Total cost: 2,500.00
Notes: Transportation for large, dismantled components and waste to designated facilities.
Recyclable
Cradle 2 cradle
Unit: Metric tons
Quantity: 5
Ref. unit cost: 50.00
Total cost: 250.00
Destination method: Sent to a metal recycling facility.
Notes: Metal components from dismantled machinery
Waste: Concrete Rubble
Recyclable
Unit: Tons
Quantity: 10
Ref. unit cost: 30.00
Total cost: 300.00
Destination method: Crushed and recycled for construction aggregates.
Notes: Concrete from base and support structures
Waste: Electronic scrap
Recyclable
Unit: Units
Quantity: 20
Ref. unit cost: 10.00
Total cost: 200.00
Destination method: Disposed of at certified e-waste recycling centers, ensuring environmentally safe handling.
Notes: E-Waste from Sensors and Monitoring Equipment