Concentration Cell Power Storage From Osmotic Salinity Gradients
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Solution Overview
Problem
Current methods for converting small temperature difference thermal energy into mechanical or electrical energy are inefficient due to high costs associated with engines like Rankine and Sterling engines, which limits the utilization of abundant thermal energy sources.
Innovation Solution
Development of low-cost systems utilizing concentration cells and solar ponds with electrodes placed in areas of differing solute concentrations to harness 'free energy of mixing' and entropy gradients, allowing for efficient conversion of thermal energy into electrical energy without carbon dioxide emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If Rankine or Sterling engines are used to convert small temperature difference thermal energy into mechanical or electrical energy, then energy conversion can be achieved, but the cost is high and efficiency is limited
Solution Approach 1:
The patent replaces complex mechanical heat engines (Rankine or Sterling engines) with a chemical concentration cell system. Instead of using mechanical components to convert thermal energy, the invention uses electrochemical reactions in concentration cells to directly generate electricity from thermal energy-driven concentration gradients, thereby reducing manufacturing cost and complexity while maintaining energy conversion capability
Solution Approach 2:
The patent changes the fundamental conversion parameter from mechanical work to electrochemical potential. By utilizing the Nernst equation relationship between concentration gradient and electrical potential, the system converts thermal energy into electrical energy through changes in chemical concentration parameters rather than mechanical parameters, achieving lower cost and higher efficiency
2Object-generated harmful factors
If concentration cells are used to generate electricity from salinity gradients, then carbon dioxide emission is eliminated, but the system requires specific geographic locations with river-ocean interfaces
Solution Approach 1:
The patent makes the concentration cell system universally applicable by demonstrating that it can function in multiple geographic settings beyond just river-ocean interfaces. The system can be deployed in any location with salinity or concentration gradients including salt lakes, estuaries, and even portable applications, thereby maintaining its zero carbon dioxide emission benefit while significantly improving geographic adaptability
Solution Approach 2:
The patent introduces concentration cells as an intermediary device that can bridge different geographic environments. The cells serve as a universal mediator that converts various types of concentration gradients (whether from river-ocean mixing, salt lakes, or other sources) into electrical energy, eliminating the need for specific geographic conditions while maintaining environmental benefits
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 solution enables the efficient and cost-effective conversion of small temperature difference thermal energy into electrical energy, reducing environmental impact and increasing energy production from abundant thermal sources.
Implementation Method 1
Power from osmosis has been known for years. There is also plenty of fresh water from rivers flowing into the ocean with salt water. These areas at the mouths of rivers that flow into the ocean could be used as a source of power.
Implementation Method 2
Energy called the 'free energy of mixing' (or 'heat of mixing') occurs when fresh water flows into salt water. The free energy of mixing reflects an increase in entropy of water (or other solvents) when it is transformed from its pure (fresh-water) state to its diluted (salt-water) state.
Implementation Method 3
an entropy gradient is created whenever two bodies of water or other solvent having differing solute concentrations are brought into contact with one another and begin to mix. This entropy gradient can be physically observed and measured in the well-known phenomena known as osmosis.
Implementation Method 4
The other natural source of electric power from a concentration or entropy gradient occurs in salt water lakes and the ocean. Salt water is denser than freshwater. Thus, the water in a salt water lake or the ocean has different concentrations of salt at different depth.
Data Source
AI summary
This invention uses the process of osmosis and diffusion of a liquid of low concentration into a liquid of high concentration. The device taps the energy created by a liquid of low concentration flowing into a liquid of high concentration. The inventor has created several embodiments that can be heat engines, heat pumps, energy storage devices, and batteries. The invention changes solar ponds and concentration cells into heat storage devices and rechargeable batteries. Osmosis at two semipervious membranes, one heated and one cooled, in a loop of tubing produces a heat engine. A heat pipe is changed into a heat engine by using different concentrations at each end. Two vessels, one containing a high concentration of a liquid and the other containing a low concentration of a liquid, can be configured with the used of electrodes, turbines, semipervious membranes into heat engines, heat pumps, energy storage devices, and batteries.