CO2 Curing Chamber Control for Water Removal Bottlenecks
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Solution Overview
Problem
Conventional curing chambers face challenges in terms of cost, operating conditions, and precision, particularly in controlling the curing process of materials that require specific atmospheric conditions like carbon dioxide concentration, temperature, and humidity.
Innovation Solution
A controller system that includes a microprocessor to manage a curing chamber's carbon dioxide flow, temperature, and humidity levels, ensuring precise control over the curing process by regulating these parameters in real-time and monitoring the state of cure, using a gas conditioning system and a curing chamber connected by gas delivery and recovery tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional curing chambers are used, then the curing process can be performed, but the cost is high and precision in controlling atmospheric conditions is limited
Solution Approach 1:
The system divides the curing chamber into multiple zones with independent control over CO2 concentration, temperature, and humidity. Each zone can be optimized separately, allowing precise control of atmospheric conditions without requiring a completely redesigned complex chamber system.
Solution Approach 2:
The controller continuously monitors CO2 concentration, temperature, and humidity levels in the curing chamber and automatically adjusts gas flow rates, heating, and cooling to maintain target conditions. This closed-loop feedback system achieves high precision control without requiring overly complex manual intervention systems.
2Productivity
If CO2 flow rate is increased to accelerate curing, then carbonation rate improves, but water removal may become insufficient leading to curing defects
Solution Approach 1:
The system dynamically adjusts CO2 flow rate based on real-time monitoring of material moisture content and curing stage. During early stages when water removal is critical, the CO2 flow is moderated. As curing progresses and water content decreases, the CO2 flow rate is increased to accelerate carbonation, thereby maintaining both curing speed and quality.
Solution Approach 2:
The controller modifies multiple parameters simultaneously - adjusting CO2 concentration, temperature, and humidity levels in coordination with each other. This multi-parameter adjustment allows the system to optimize both carbonation rate and water removal efficiency throughout the curing process, resolving the trade-off between productivity and reliability.
3Productivity
If temperature is increased to speed up curing, then carbonation reaction rate improves, but energy consumption increases and material damage risk increases
Solution Approach 1:
The system employs periodic heating and cooling cycles rather than continuous high-temperature maintenance. Temperature is elevated during active carbonation phases to accelerate reactions, then reduced during intervals when material needs to acclimate or when CO2 supply is being adjusted. This periodic approach maintains high curing speed while significantly reducing overall energy consumption compared to sustained high-temperature processing.
4Measurement precision
If humidity is controlled to optimize carbonation, then curing precision improves, but system complexity and cost increase
Solution Approach 1:
The curing chamber system is designed to simultaneously control multiple atmospheric parameters - CO2 concentration, temperature, and humidity - using a single integrated controller that coordinates all subsystems. This multi-functional approach achieves high precision atmospheric control without requiring separate dedicated systems for each parameter, thereby limiting the increase in overall system complexity.
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 system enables efficient and precise curing of materials by optimizing carbonation rates, reducing cure time, and minimizing water content, resulting in materials with improved strength and environmental benefits, such as reduced carbon footprint and energy consumption.
Implementation Method 1
curing composite materials by controlling the atmospheric conditions... controlling the curing process of materials that require specific atmospheric conditions like carbon dioxide concentration
Implementation Method 2
controlling over rate limiting steps in water removal... minimizing water content
Implementation Method 3
temperature control subsystem configured to control a temperature of the gas within the chamber
Data Source
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AI summary
The invention encompasses equipment used to condition a recirculating gas stream in order to cure a CO2 Composite Material (CCM) and processes that use such equipment to cure the CCM. The gas conditioning equipment allows for a process that controls, reduces or eliminates the rate-limiting steps associated with water removal during the curing of a composite material. The equipment may include, but will not be limited to, control over the temperature, relative humidity, flow rate, pressure, and carbon dioxide concentration within the system; which includes the conditioning equipment, any vessel containing the CCM, and the material itself. Flow rate control can be used as a means to achieve uniformity in both gas velocity and composition.