Helical Colloidal Heat-to-Power Converter for Low-Gradient Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies for converting low-temperature waste heat into electrical energy face challenges in achieving high efficiency and scalability, particularly with solid-state devices that are less adaptable and flexible compared to liquid devices.
Innovation Solution
A liquid-state device comprising a first and second layer of thermally conductive material with an intermediate polymer layer containing helical channels filled with a colloidal suspension of active particles. This device utilizes thermomagnetic advection, pyroelectric, and triboelectric effects to convert thermal energy into electrical energy, with the asymmetrical helical shape of the channels enhancing fluid flow and energy extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If solid-state thermoelectric devices are used to convert low-temperature waste heat into electrical energy, then the conversion efficiency is limited by thermodynamic constraints, but the device structure is simple and manufacturing is straightforward
Solution Approach 1:
The patent employs a liquid-state colloidal suspension flowing through channels instead of solid-state materials. The fluid flow enables thermomagnetic advection and pyroelectric/triboelectric effects, achieving higher energy conversion efficiency while maintaining adaptability through fluid dynamics control
Solution Approach 2:
The invention changes the physical state parameter from solid to liquid, enabling the system to exploit flow-dependent phenomena such as thermomagnetic advection and enhance heat transfer efficiency, thereby improving both energy conversion and adaptability
2Temperature
If traditional thermodynamic cycles (Brayton, Stirling, Kalina, ORC) are used for waste heat recovery, then the system can handle large temperature gradients, but the device complexity and space requirements increase
Solution Approach 1:
The patent combines multiple energy conversion mechanisms (thermomagnetic advection, pyroelectric effect, triboelectric effect) within a single integrated device structure, enabling the system to handle various temperature gradients without requiring separate complex thermodynamic cycle systems
Solution Approach 2:
The device is designed to operate across a wide temperature range (from small gradients up to 500°C and above) using the same fundamental structure and multiple physical effects, providing universal applicability that eliminates the need for temperature-specific system designs
3Productivity
If large surface areas are used with thermoelectric materials to maximize heat transfer, then the energy recovery increases, but the device volume and weight increase
Solution Approach 1:
The patent utilizes a colloidal suspension within channels, creating a high surface-area-to-volume ratio heat transfer medium. This allows extensive heat exchange surfaces to be contained within a compact device volume, improving energy recovery without proportional volume increase
Solution Approach 2:
The liquid-state colloidal system enables efficient heat transfer through fluid circulation, allowing compact heat exchanger designs that achieve high energy recovery in reduced volumes compared to solid-state counterparts requiring large contact surfaces
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 device achieves high efficiency in recovering energy from small temperature gradients, is scalable up to 200°C, and can directly collect energy from temperatures up to 500°C and above, outperforming traditional systems in efficiency and adaptability.
Implementation Method 1
a colloidal suspension which is capable of flowing along said channels as a result of a temperature gradient applied between said first and second layer
Implementation Method 2
configured to extract electrostatic force or electromotive force induced as a response to a flow of the colloidal suspension
Implementation Method 3
configured to extract electrostatic force or electromotive force induced as a response to a flow of the colloidal suspension as a result of at least one among a pyroelectric effect, triboelectric effect and thermomagnetic advection
Implementation Method 4
configured to extract electrostatic force or electromotive force induced as a response to a flow of the colloidal suspension as a result of at least one among a pyroelectric effect, triboelectric effect and thermomagnetic advection
Data Source
AI summary
A device for converting thermal energy into electrical energy has a first and second layer of thermally conductive material, and an intermediate layer of polymer material arranged between the first and second layers and having a thermal conductivity lower than the first and the second layers. A plurality of channels in which a colloidal suspension of active particles is contained is arranged inside the intermediate layer, the colloidal suspension being capable of flowing along each of the channels as a result of a temperature gradient applied between the first and second layers. Pick-up elements arranged along the channels are configured to extract electrostatic force or electromotive force induced as a response to a flow of the colloidal fluid as a result of at least one among a pyroelectric effect, a triboelectric effect, and thermomagnetic advection. Each channel forms a closed loop and has an outgoing branch and a return branch.