Rotatable Balloon Envelope for Solar Buoyancy Control
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Solution Overview
Problem
There is a need for reliable and efficient data connectivity in areas where traditional network infrastructure is unavailable, unreliable, or costly, particularly in regions with limited access to internet and cellular data networks.
Innovation Solution
A high-altitude balloon network is deployed in the stratosphere, utilizing a mesh configuration with balloons communicating via free-space optical and RF links, where buoyancy is controlled by adjusting the temperature of the gas within the balloon envelope through solar energy absorption, allowing for altitude adjustments and station-keeping to maintain network topology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional network infrastructure is deployed in remote areas, then data connectivity coverage is improved, but deployment cost and complexity increase significantly
Solution Approach 1:
The network infrastructure is segmented into multiple independent balloon nodes distributed across the stratosphere, each capable of autonomous operation and local routing. This replaces the need for continuous ground-based infrastructure with discrete, deployable units that can be independently managed and positioned.
Solution Approach 2:
The network is moved from the traditional ground-based two-dimensional deployment to a three-dimensional stratospheric platform at approximately 20 kilometers altitude. This dimensional shift enables coverage of remote and difficult-to-access areas without requiring physical ground infrastructure in those locations.
2Ease of manufacture
If hot air balloons are used for network deployment, then deployment cost is reduced, but altitude control precision deteriorates
Solution Approach 1:
The balloon envelope incorporates dynamically adjustable solar absorptive panels that can rotate or reposition to control the amount of solar energy absorbed. This enables active altitude control by adjusting the balance between solar heating and cooling, allowing precise position maintenance despite using simple hot air balloon technology.
Solution Approach 2:
The system controls altitude by changing the thermal parameters of the envelope through adjustable solar absorption. By varying the absorptive properties of the envelope surface, the system can precisely control the rate of heat gain from solar radiation, thereby maintaining desired altitude with minimal energy consumption.
3Use of energy by moving object
If solar energy absorption is used for altitude control, then energy consumption is reduced, but altitude adjustment speed deteriorates
Solution Approach 1:
The solar absorptive panels can be periodically adjusted or repositioned to modulate energy absorption rates. This periodic control allows the system to respond to altitude deviations by adjusting solar absorption in cycles, achieving both energy efficiency and adequate response speed for maintaining network topology.
Solution Approach 2:
The system can preliminarily adjust solar absorption settings in anticipation of predicted altitude changes or network topology requirements. By pre-positioning the absorptive panels to optimal configurations, the system prepares for upcoming altitude adjustments, reducing the effective response time while maintaining energy efficiency.
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
The balloon network provides a robust and energy-efficient data connectivity solution, offering high-capacity links and adaptability to changing wind patterns and network demands, while minimizing interference with commercial air traffic and reducing energy consumption.
Implementation Method 1
buoyancy is controlled by adjusting the temperature of the gas within the balloon envelope through solar energy absorption
Implementation Method 2
US 4,174,082 discloses a solar powered hot air balloon having an envelope with an opaque portion and a transparent portion so as to utilize solar heating
Implementation Method 3
adjusting the temperature of the gas within the balloon envelope... allowing for altitude adjustments
Implementation Method 4
buoyancy is controlled by adjusting the temperature of the gas within the balloon envelope
Data Source
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AI summary
A balloon that includes an envelope with a gas contained within the envelope, as well as a payload connected to the envelope wherein the envelope has a first portion that has a first absorptive or reflective property with respect to allowing solar energy to be transferred to the gas within the envelope, and a second portion that has a second absorptive or reflective property with respect to allowing solar energy to be transferred to the gas within the envelope where the second absorptive or reflective property is different than the first absorptive or reflective property, and wherein the envelope is rotatable to allow a preferred ratio of the first and second portions of the envelope to be positioned facing the sun.