Steam Dispersion Header Segmentation for Low-Load Humidification
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Solution Overview
Problem
Current steam dispersion systems are inefficient as they maintain maximum steam dispersion capacity even at low humidification loads, leading to increased heat gain and condensate, and require numerous nozzles or tubes to achieve short non-wetting or absorption distances, which undesirably heat duct air and create condensate.
Innovation Solution
A steam dispersion system with a divider-separated header and control system that activates or deactivates steam dispersion tubes based on humidity load conditions, allowing only necessary tubes to operate, reducing heat gain and condensate while maintaining acceptable non-wetting or absorption distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the number of dispersion tubes and nozzles is increased to achieve short non-wetting distance at highest load, then the non-wetting distance is reduced, but heat gain and condensate increase significantly
Solution Approach 1:
The header is divided into multiple isolated chambers by dividers, with each chamber containing a subset of dispersion tubes. This segmentation allows selective activation of only the necessary chambers based on humidity load, reducing the number of active tubes at partial loads while maintaining adequate non-wetting distance when needed.
Solution Approach 2:
The system dynamically adjusts the number of active dispersion tubes by selectively opening or closing chambers in response to varying humidity demands. The control system activates or deactivates chambers based on real-time humidity sensor feedback, optimizing performance across different load conditions rather than operating all tubes at maximum capacity continuously.
2Length of stationary object
If the number of dispersion tubes and nozzles is increased to achieve short non-wetting distance at highest load, then the non-wetting distance is reduced, but condensate production increases significantly
Solution Approach 1:
The header is divided into multiple isolated chambers by dividers, with each chamber containing a subset of dispersion tubes. This segmentation allows selective activation of only the necessary chambers based on humidity load, reducing the number of active tubes at partial loads while maintaining adequate non-wetting distance when needed.
Solution Approach 2:
The system dynamically adjusts the number of active dispersion tubes by selectively opening or closing chambers in response to varying humidity demands. The control system activates or deactivates chambers based on real-time humidity sensor feedback, optimizing performance across different load conditions rather than operating all tubes at maximum capacity continuously.
3Power
If all dispersion tubes remain active at all times, then maximum steam dispersion capacity is maintained, but heat gain and condensate increase unnecessarily at low loads
Solution Approach 1:
The system dynamically adjusts the number of active dispersion tubes by selectively opening or closing chambers in response to varying humidity demands. The control system activates or deactivates chambers based on real-time humidity sensor feedback, optimizing performance across different load conditions rather than operating all tubes at maximum capacity continuously.
Solution Approach 2:
A humidity sensor provides feedback to the control system, which then adjusts the number of active chambers accordingly. This closed-loop control ensures that steam dispersion capacity matches actual humidity demands, preventing unnecessary heat gain and condensate formation when full capacity is not required.
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 system effectively reduces unwanted heat gain and condensate by selectively activating steam dispersion tubes only when needed, ensuring efficient humidity control and maintaining desired non-wetting or absorption distances across varying load conditions.
Implementation Method 1
Within a certain distance, the water particles are absorbed by the air stream within the duct. The distance wherein water particles are completely absorbed by the air stream is called absorption distance.
Implementation Method 2
As steam mixes with cooler duct air, some condensation takes place in the form of water particles.
Implementation Method 3
The steam dispersion system includes a control system for automatically activating or deactivating, thus supplying or cutting off steam to, a given chamber in response to a humidification demand
Data Source
AI summary
A steam dispersion system is disclosed. The steam dispersion system includes a header, a divider dividing the header into at least two interior chambers that are generally not in fluid communication with each other, and at least two steam dispersion tubes, each steam dispersion tube communicating with only one interior chamber. Each interior chamber includes a separate steam flow valve for independently controlling the amount of steam flow to each chamber based on the difference between a measured humidity value and a predetermined desired humidity value.