Stratosphere Tethered Photovoltaic Platform
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Solution Overview
Problem
Current photovoltaic solar energy systems face high capital costs, low energy conversion efficiency, and are affected by weather conditions, requiring large land areas and materials, with previous attempts to use buoyant airships or aerostats for power generation being limited by durability and scale issues, especially at high altitudes where weather is more benign.
Innovation Solution
A large, lightweight, rigid buoyant structure supports a utility-scale photovoltaic array at an altitude of about 20 km in the low stratosphere, connected to the ground by long, strong tethers, with high voltage transmission lines bringing electricity to the surface, utilizing a modular construction method to assemble and deploy the platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If photovoltaic arrays are deployed at ground level or low altitude, then installation and maintenance are easier, but weather conditions (dust, wind, rain, hail, frost, snow) make power generation unpredictable and require stronger, more expensive structures
Solution Approach 1:
The patent moves the photovoltaic array from the ground level (2D plane) to the stratosphere (3D vertical displacement at approximately 20 km altitude), fundamentally changing the operational environment from weather-prone troposphere to stable stratospheric conditions. This dimensional transition eliminates exposure to terrestrial weather elements while maintaining structural integrity through the aerostat platform design
2Power
If large-scale photovoltaic systems are deployed to produce meaningful power, then power output increases, but land area consumption and construction material usage increase significantly
Solution Approach 1:
The invention transitions from ground-based horizontal expansion (2D land consumption) to atmospheric vertical deployment (3D space utilization). By positioning the photovoltaic array in the stratosphere, the system produces utility-scale power without consuming terrestrial land area, as the aerostat platform occupies atmospheric space rather than ground space
3Productivity
If photovoltaic systems use robust mechanical support and tracking mechanisms for each collector element, then power collection efficiency improves, but overall system cost increases significantly
Solution Approach 1:
The patent extracts and eliminates the complex mechanical support, motors, gears, and electrical equipment from each individual collector element. Instead, the system uses a simplified aerostat platform with PV panels that can passively track sunlight through atmospheric positioning, removing the need for expensive mechanical tracking mechanisms while maintaining power collection efficiency
Solution Approach 2:
The invention replaces mechanical tracking systems with atmospheric positioning. The aerostat platform utilizes wind currents and atmospheric conditions at stratospheric altitudes to maintain optimal solar exposure, substituting complex mechanical actuation with passive aerodynamic positioning
4Reliability
If aerostats are used for stratospheric power generation, then weather interference is minimized, but durability and scale issues limit previous attempts
Solution Approach 1:
The patent employs composite material construction for the aerostat platform, combining lightweight materials with high strength-to-weight ratios. The aerostat envelope uses advanced polymer or fabric composites that provide both structural integrity for stratospheric durability and flexibility for atmospheric operation, while the framework utilizes composite materials resistant to UV degradation and extreme temperature variations
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
This solution provides lower-cost, reliable electricity with higher efficiency due to intense and predictable solar energy, reducing land and material usage, and enabling long-term operation without weather interference, while minimizing environmental impact.
Implementation Method 1
A large, lightweight, rigid buoyant structure supports a utility-scale photovoltaic array at an altitude of about 20 km in the low stratosphere
Implementation Method 2
Photovoltaic (PV) solar energy systems use solar cells to convert solar energy directly into electricity
Data Source
AI summary
The present invention is realized by apparatus and methods for placing a large utility scale photovoltaic array in the low stratosphere of earth's atmosphere at an altitude of about 20 km, above clouds, moisture, dust, and wind. This is accomplished using a large light-weight, rigid, buoyant structure to support the large photovoltaic array. Long, strong and light tethers connect the buoyant structure to the ground and hold it in position against wind forces. The electricity output from the photovoltaic array is then coupled to high voltage transmission lines which connect from the platform to the earth's surface. The electricity is then transmitted through the high voltage transmission lines to the earth's surface where it is connected to the electrical supply grid and provides lower cost, more reliable electricity.