Electrostatic Plant Watering System for Microgravity
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Solution Overview
Problem
Current electrosprayer systems for delivering water and nutrients to plants in space face challenges such as high power consumption, mass, and safety hazards due to pressurized gases or fluids, and are not suited for small volumes or microgravity environments, leading to inefficiencies and risks in plant hydration and surface sterilization.
Innovation Solution
An electrostatic plant watering system that uses a pump to provide a pressurized fluid at a low pressure through a conductive metallic ring, which becomes electrostatically charged, allowing for precise delivery of water or nutrients to plant roots without the need for pressurized air or hydraulic pressurization, designed for operation in confined spaces with limited power and durable components for long-duration spaceflight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pressurized gases or fluids are used to atomize fluids in electrosprayer systems, then spray deposition efficiency is improved, but power consumption and mass increase
Solution Approach 1:
The patent replaces the mechanical pressurization system (pumps and pressurized gases) with an electrostatic field-based atomization system. The electrostatic field directly charges and propels fluid particles without requiring mechanical pressurization, thereby eliminating the need for complex pressurization equipment and reducing power consumption while maintaining spray deposition efficiency.
Solution Approach 2:
The patent changes the fundamental parameter of fluid delivery from pressure-driven to electrostatic field-driven. By applying high voltage to charge the fluid particles, the system achieves atomization and propulsion through electrostatic forces rather than mechanical pressure, fundamentally altering the operating parameters to reduce both mass and power consumption.
2Ease of operation
If pressurized gases or fluids are used in electrosprayer systems, then spray control is improved, but safety hazards increase
Solution Approach 1:
The patent replaces the mechanical pressurization system with an electrostatic field system, eliminating the safety hazards associated with high-pressure gases and fluids. The electrostatic field provides precise spray control through voltage modulation without the inherent safety risks of pressurized systems, particularly important for confined spaces like the International Space Station.
3Area of stationary object
If electrostatic spraying systems are designed for large-scale agricultural applications, then spray coverage is improved, but adaptability to small volumes and microgravity environments decreases
Solution Approach 1:
The patent designs the electrostatic spraying system with localized, adjustable parameters that can be optimized for different application scales. The system uses adjustable voltage and electrode configuration to adapt from large-scale agricultural applications to small-volume space plant cultivation, providing local optimization for each specific environment rather than a fixed large-scale design.
Solution Approach 2:
The patent creates a universal electrostatic spraying system that can function across multiple scales and environments. By using electrostatic fields rather than gravity-dependent mechanisms, the system achieves multi-functionality that adapts to both terrestrial agricultural applications and microgravity space environments, eliminating the need for separate systems for different applications.
4Productivity
If manual pumping is used to deliver water to plant roots in space, then water delivery is achieved, but labor intensity and precision control decrease
Solution Approach 1:
The patent implements a self-regulating electrostatic spraying system that automatically controls water delivery to plant roots. The electrostatic field inherently provides precise control over fluid particle delivery without requiring manual intervention, eliminating the labor-intensive manual pumping operations currently required in space applications while maintaining precise water delivery control.
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 system achieves efficient and safe delivery of water and nutrients to plant roots with reduced power consumption and mass, suitable for small volumes and microgravity environments, minimizing waste and ensuring consistent hydration and sterilization.
Implementation Method 1
a conductive metallic ring that is electrically charged by a voltage source. As the fluid particles pass through the center of the electrically charged ring, the particles themselves become charged
Implementation Method 2
a pump with a pressurizing end and an output end that provides a pressurized fluid at a constant flow rate through a nozzle at a low pressure
Implementation Method 3
The nozzle also has an output surface that atomizes the pressurized fluid into a fine mist of fluid particles
Data Source
AI summary
The subject invention is an electrostatic plant watering system for the delivery of water and nutrients to the roots of plants. The system provides water or another fluid from a fluid source or container using a pump. The pump provides a pressurized fluid at a constant flow rate through a nozzle at a low pressure, which sprays a fine mist of particles through a conductive metallic ring that is electrically charged by a voltage source. As the fluid particles pass through the center of the electrically charged ring, the particles themselves become charged, allowing them to attach to the roots of a target plant positioned at a selected distance away from the electrostatic plant watering system.