Gradient Energy System Gas Mixture Recovery
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Solution Overview
Problem
Existing energy systems fail to effectively harness and recover energy from gradients of gas mixtures, such as those found in manufacturing, power plant, and biological processes, where energy remains untapped.
Innovation Solution
A gradient energy system utilizing a membrane module with a first and second section separated by a membrane, where a differential between the first gas and the second gas generates a fluid pressure force or electrical current, allowing for the recovery of energy from gas mixture gradients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional energy systems are used, then energy recovery is not achieved, but energy remains untapped and is lost
Solution Approach 1:
The patent converts the previously wasted energy contained in gas mixture gradients (humid air mixing with dry air) into useful electrical energy. By using a membrane module with selective permeability to water vapor, the system captures the Gibbs free energy of mixing that would otherwise be lost, transforming an environmental waste product into a recoverable energy source.
Solution Approach 2:
The membrane module acts as an intermediary between the first gas (humid air) and second gas (dry air), selectively allowing water vapor to pass through while blocking other gas molecules. This intermediary structure enables the system to harness the concentration gradient energy without requiring direct mixing of the gases, thereby recovering energy that would otherwise be unavailable.
2Loss of energy
If gas mixture gradients are left untapped, then system complexity remains low, but energy potential is wasted
Solution Approach 1:
The patent employs a thin film membrane with specific permeability characteristics to water vapor. This thin film structure enables selective separation of water vapor from gas mixtures without requiring complex mechanical systems, achieving energy recovery through the membrane's inherent selective transport properties while maintaining relatively simple system architecture.
Solution Approach 2:
The system utilizes changes in concentration parameters (water vapor partial pressure) across the membrane to generate energy. By exploiting the natural concentration gradient between humid and dry air streams and the membrane's selective permeability parameter, the system converts these parameter differences into electrical current without requiring complex active control mechanisms.
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 efficiently converts gas gradients into mechanical work and/or electrical current, effectively capturing and recovering energy that would otherwise be lost, as demonstrated by power densities of near 15 W/m2 under room temperature conditions.
Implementation Method 1
The membrane may be based on a solubility-diffusivity mechanism, where a first gas (e.g., water vapor) is more soluble and/or more diffusive through the membrane than a second gas (e.g., nitrogen, oxygen, or other gases).
Implementation Method 2
The mixing of gas mixtures with different compositions may release energy (known as Gibbs free energy of mixing).
Implementation Method 3
a differential associated with the first gas and the second gas generates a fluid pressure force or an electrical current
Data Source
AI summary
A gradient energy system includes a membrane module including a first section, a second section, and a membrane separating the first section and the second section. A first gas may be provided within the first section. A second gas may be provided within the second section. The membrane module may be configured such that a differential associated with the first gas and the second gas generates a fluid pressure force or an electrical current. A method of recovering energy from gradients of gas mixtures may include providing a first gas to a first section of a membrane module, providing a second gas to a second section of the membrane module, which may be separated from the first section by a membrane, and/or recovering energy generated via a differential between the first gas and the second gas.