Thermochemical Labyrinth Reactor with Recuperation Zone
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Solution Overview
Problem
Conventional thermochemical reactors using concentrated solar flux face limitations in temperature due to radiation losses, making it economically and physically challenging to achieve efficient water and carbon dioxide splitting at high temperatures.
Innovation Solution
A two-step thermochemical labyrinth reactor design utilizing electric heating with a modular structure, incorporating high temperature electric heaters and a recuperation zone with infrared-transparent windows to reclaim heat, allowing operation at temperatures exceeding 1600°C, and enabling efficient water and carbon dioxide splitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If concentrated solar flux is used to heat the reactor, then the reactor can operate at high temperatures for efficient water and carbon dioxide splitting, but radiation losses through the aperture limit the maximum achievable temperature
Solution Approach 1:
The reactor is divided into multiple zones (reduction zone, reoxidation zone, recuperation zone) with distinct functions. The reduction zone is further segmented into multiple channels (first reduction channel, second reduction channel) that are thermally isolated, allowing independent temperature optimization for each channel.
Solution Approach 2:
The patent employs nested channel structures where recuperation channels are positioned between reduction channels, and reoxidation channels are integrated within the reactor structure. This nesting allows efficient heat recovery from hot exhaust gases to preheat incoming feedstock while maintaining compact reactor geometry.
Solution Approach 3:
The patent introduces a spatial dimension to heat management by creating three-dimensional channel networks with multiple levels. The recuperation zone uses vertical and horizontal channel arrangements to maximize heat exchange surface area while minimizing radiation losses through strategic aperture placement and insulation.
2Power
If the reduction temperature is increased to improve efficiency and power density, then more energy is available for water and carbon dioxide splitting, but the capital cost and operational feasibility decrease
Solution Approach 1:
The patent systematically varies operational parameters including temperature gradients across different zones, pressure conditions, and gas flow rates to optimize the balance between power density and economic feasibility. The reduction temperature is maintained at 1600-2000°C in specific zones while other zones operate at lower temperatures.
Solution Approach 2:
The reactor incorporates dynamic control mechanisms for adjusting heating rates, gas flow patterns, and residence times to optimize power density under different operating conditions. The system can adaptively respond to changes in feedstock composition and energy demand.
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 design achieves higher efficiency and power density compared to conventional solar flux-powered reactors, reducing operational costs and enhancing compatibility with various renewable energy sources while maintaining high temperatures.
Implementation Method 1
a reduction zone having a first temperature and including a plurality of high temperature electric heaters
Implementation Method 2
the plurality of windows is substantially transparent to infrared radiation, allowing an exchange of thermal radiation between the first recuperation channel and the second recuperation channel
Implementation Method 3
The plurality of reactor plates are movably coupled to the track, and the transit system is configured to shuttle the plurality of reactor plates between the reduction zone and the reoxidation zone
Implementation Method 4
The high temperature electric heaters are each incandescent heat lamps having a filament within an envelope
Data Source
AI summary
A thermochemical labyrinth reactor is disclosed. The reactor has a reoxidation zone and a reduction zone with electric heaters. A recuperation zone connects the reduction and reoxidation zones with first and second channels, the first channel adjoining the second channel, being separated by windows allowing an exchange of thermal radiation between channels while preventing gas exchange. The reactor also includes reactor plates composed of a reactive material, and a transit system running through the three zones, with the transit system configured to shuttle the plates between the reduction zone and the reoxidation zone, moving the plates along a circuit. The reactor also has a feedstock gas emitter to introduce a feedstock gas flowing opposite the movement of the plates. A gas extractor is configured to extract a product gas resulting from the feedstock gas being split by the oxidizing reactive material. All three zones are surrounded by an insulating housing.