Multi-flight Auger Solar Thermochemical Reactor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional solar thermochemical reactors face inefficiencies due to temperature non-uniformities and component fatigue from extreme thermal cycling, as well as wasteful heat expenditure on non-reactive portions of the bed, limiting the productivity and cost-effectiveness of thermal swing processes.
Innovation Solution
A multi-flight auger reactor design that includes a first reaction zone for heating particles with concentrated solar energy and a second reaction zone for oxidation, utilizing a particle transport component to move particles between zones, enabling efficient heat recovery and conveying solid particulate materials between different temperature process volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed bed honeycomb substrate reactor is used, then the reactor structure is simple, but temperature non-uniformities occur and thermal efficiency is low due to heating non-reactive portions
Solution Approach 1:
The reactor bed is segmented into movable particle beds that can be continuously circulated between reaction zones. This segmentation allows only reactive material to be heated by solar energy, eliminating waste heat to non-reactive substrate portions while maintaining structural simplicity through modular particle handling.
Solution Approach 2:
The reactor transitions from a static fixed bed to a dynamic circulating bed system. Particles are continuously moved through the reactor, allowing active material to be positioned in heating zones only when needed, thereby improving thermal efficiency by eliminating continuous heating of inactive material while keeping the overall reactor structure relatively simple.
2Ease of manufacture
If a fixed bed honeycomb substrate reactor is used, then the reactor structure is simple, but temperature non-uniformities occur leading to component fatigue from extreme thermal cycling
Solution Approach 1:
The continuous circulation of particle beds dynamically redistributes thermal loads throughout the reactor. By continuously moving material in and out of the solar heating zone, no single component experiences extreme cyclic thermal stress, thereby improving reliability while maintaining a relatively simple reactor structure without complex thermal management systems.
3Productivity
If concentrated solar energy is used to heat particles, then fuel production efficiency increases, but heat loss to non-reactive portions decreases thermal efficiency
Solution Approach 1:
The reactive particle material is extracted and separated from any non-reactive carrier or substrate material. Only the reactive particles that actually participate in fuel production are heated by concentrated solar energy, completely eliminating waste heat to non-reactive portions while maintaining high fuel production efficiency.
Solution Approach 2:
The particle bed is dynamically circulated so that material is only exposed to solar heating when it is in the reactive zone and actively producing fuel. This dynamic positioning ensures that concentrated solar energy is applied only when and where it contributes to fuel production, eliminating waste heat while maintaining high productivity.
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 multi-flight auger reactor enhances process energy efficiency by maximizing heat exchange and minimizing waste heat, thereby improving the overall efficiency of thermal swing processing and solar thermochemical fuel production.
Implementation Method 1
a high temperature zone heated by received concentrated solar energy
Implementation Method 2
heated by the received sunlight
Implementation Method 3
a multi-flight auger within a casing capable of conveying the solid particulate material from the high temperature zone to the low temperature zone when the casing is rotated
Implementation Method 4
enabling efficient heat recovery and conveying solid particulate materials between different temperature process volumes
Data Source
AI summary
A thermal swing reactor including a multi-flight auger and methods for solar thermochemical reactions are disclosed. The reactor includes a multi-flight auger having different helix portions having different pitch. Embodiments of reactors include at least two distinct reactor portions between which there is at least a pressure differential. In embodiments, reactive particles are exchanged between portions during a reaction cycle to thermally reduce the particles at first conditions and oxidize the particles at second conditions to produce chemical work from heat.