Ionized Fluid Heat-to-Power Conversion Beyond Space-Charge Limits
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Solution Overview
Problem
Current technologies for converting thermal energy into electrical energy, such as thermoelectric power generation, electro-hydrodynamics, and thermionic generators, suffer from low efficiency due to limitations in electron capacity and space-charge limitations, making them inefficient for direct heat-to-electric energy transformation.
Innovation Solution
A device utilizing a container filled with a fluid that accepts electrons, a cathode emitting electrons, and an anode that accepts these electrons, with an electric field generated within the container to facilitate the direct conversion of thermal energy into electrical energy through the diffusion of ionized particles against the electric field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If thermoelectric power generation based on the Seebeck Effect is used to convert thermal energy into electrical energy, then electrical energy can be generated from heat, but the conversion efficiency is very low (about 10%)
Solution Approach 1:
The patent replaces the solid-state thermoelectric mechanism with an electrohydrodynamic system using ionized fluid and electric fields to achieve energy conversion, fundamentally changing the physical mechanism from solid-state carrier transport to fluid-based charge transport under electric fields
Solution Approach 2:
The patent changes the working parameters by using ionized gases or liquids instead of solid thermoelectric materials, operating at higher temperatures and utilizing electric field acceleration to dramatically improve the energy conversion efficiency from thermal to electrical energy
2Loss of energy
If thermionic generators are used to transform thermal energy to electric energy, then direct heat-to-electric conversion is achieved, but electrons have very little capacity for thermal energy and the space-charge limit restricts current flow
Solution Approach 1:
The patent introduces an ionized fluid (gas or liquid) as an intermediary medium between the thermal energy source and the electric field, allowing efficient energy transfer through the fluid's thermal mass while the electric field extracts electrical energy, avoiding the limitations of direct electron emission
Solution Approach 2:
The patent changes from using electrons (which have very little thermal capacity) to using ionized atoms or molecules in the fluid, which have much greater thermal mass and can carry significantly more thermal energy while still being manipulatable by electric fields for current generation
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 achieves a more efficient conversion of thermal energy into electrical energy compared to existing methods, allowing for both cooling and power generation while reducing the gas temperature, thereby enhancing energy harvesting from heat sources.
Implementation Method 1
a heatsink transfers ambient heat to the gas
Implementation Method 2
a cathode emits electrons to the gas
Implementation Method 3
An electric field is established that pushes the ionized particles towards the cathode and away from the anode
Implementation Method 4
Both, movement and electron transfer, create a diffusion effect that transports the charges against the force of the electric field
Implementation Method 5
an anode is provided that accepts electrons from the fluid
Data Source
AI summary
Devices and methods for transformation of thermal energy directly into electrical energy. A fluid having particles to accept and emit electrons is in a container. At the container, a cathode is configured to emit electrons, wherein the particles of the fluid accept electrons emitted by the cathode, and an anode is configured to accept electrons, wherein the particles of the fluid emit electrons accepted by the anode. A heat transfer unit is configured to exchange heat with the fluid so the particles of the fluid are accelerated, and an electric field generator is configured to generate an electric field so negatively charged particles of the fluid are driven in a direction towards the cathode, while positively charged particles are driven towards the anode. Kinetic energy can be transformed directly into electrical energy.