Humidity-Driven Power Element Using Ion Membranes for Stable Output
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Solution Overview
Problem
Environmental power generation methods, such as solar cells, face instability due to environmental changes, whereas harnessing humidity variation offers a more stable energy source with continuous daily fluctuations.
Innovation Solution
A power generation method utilizing an ion permeable membrane to separate aqueous solutions of ionic compounds with deliquescence, where electrodes are inserted on both sides, one sealed and the other exposed to air, generating an electromotive force from humidity-induced ion concentration differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If solar cells are used for environmental power generation, then electrical energy can be generated from sunlight, but operation stability deteriorates due to weather dependence and intermittent operation
Solution Approach 1:
The invention changes the energy source parameter from solar radiation (intermittent, weather-dependent) to humidity variation (continuous, predictable diurnal cycle). By using deliquescent materials that respond to humidity changes, the system converts environmental moisture into electrical energy through ion concentration differences, ensuring stable operation regardless of weather conditions.
Solution Approach 2:
The system utilizes ambient humidity variation naturally occurring in the environment as the energy source, requiring no external fuel supply or complex infrastructure. The deliquescent material automatically absorbs and releases moisture based on environmental humidity, driving continuous ion movement and electricity generation without human intervention.
2Reliability
If humidity variation is used for power generation, then operation stability improves with continuous daily fluctuations, but device complexity increases due to the need for ion permeable membranes and deliquescent materials
Solution Approach 1:
The device is divided into simple functional segments: deliquescent material compartments separated by ion-permeable membranes, with electrodes in each compartment. This modular structure allows the complex function of humidity-to-electricity conversion to be achieved through simple, repeatable units that can be easily assembled and scaled.
Solution Approach 2:
Ion-permeable membranes serve as intermediaries between the deliquescent material compartments, allowing selective ion transport while maintaining physical separation. This intermediary component enables the conversion of chemical potential energy from humidity absorption into electrical energy without requiring direct contact between compartments, simplifying the overall system design.
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 approach provides stable operation and convenience by leveraging ubiquitous humidity variations, with reversible chemical reactions ensuring continuous energy generation and minimal reactant loss.
Implementation Method 1
an aqueous solution of an ionic compound having deliquescence
Implementation Method 2
an ion permeable membrane that separates an aqueous solution of an ionic compound having deliquescence
Data Source
AI summary
Provided are a power generation method and a power generating element capable of obtaining an electromotive force by utilizing humidity variation in an environment and having excellent operation stability. An aqueous solution of an ionic compound having deliquescence is separated by an ion permeable membrane, electrodes are inserted into the aqueous solution on both sides of the ion permeable membrane, one is blocked from outside air and sealed, and the other is connected to the outside air, and a difference in ion concentration derived from the ionic compound in the aqueous solution is generated across the ion permeable membrane due to a change in humidity in the outside air to generate an electromotive force between the electrodes.