Room Drying Control Using Cyclic Heat and Ventilation
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Solution Overview
Problem
Conventional methods for drying damp or water-damaged buildings are inefficient outside optimal temperature/humidity ranges and can cause secondary damage due to rapid humidity changes, with a lack of clear indicators for completion, leading to energy wastage.
Innovation Solution
A cyclic drying method that monitors temperature and humidity, adjusts heating based on diminishing temperature increase, and introduces fresh air to maintain a preselected maximum temperature or humidity, using a controlled apparatus with sensors and heating means to optimize energy use and prevent overheating or overhumidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct heating is used to raise air temperature for drying, then drying speed is improved, but relative humidity increases rapidly causing secondary damage
Solution Approach 1:
The system continuously monitors temperature and humidity levels using sensors, and automatically adjusts heating and ventilation operations based on real-time readings. This feedback mechanism prevents excessive humidity buildup while maintaining efficient drying rates, thereby avoiding secondary damage from uncontrolled heat and moisture conditions.
Solution Approach 2:
The drying process operates in periodic cycles, alternating between heating phases (to evaporate moisture) and ventilation phases (to exhaust humid air and introduce fresh air). This periodic action prevents continuous humidity accumulation during heating, resolving the contradiction between drying speed and harmful humidity levels.
2Reliability
If dehumidification using refrigeration or desiccants is used, then humidity control is improved, but efficiency decreases outside optimal temperature/humidity ranges
Solution Approach 1:
The system dynamically adjusts operational parameters (heating power, ventilation rate, cycle timing) based on actual temperature and humidity measurements. This allows the system to maintain reliable humidity control while adapting to varying environmental conditions, avoiding the fixed-parameter limitations of refrigeration and desiccant systems that lose efficiency outside their optimal ranges.
Solution Approach 2:
The drying system transitions from static, fixed-operation dehumidification methods to a dynamic system that continuously monitors conditions and adjusts heating and ventilation operations in real-time. This dynamic approach maintains energy efficiency across varying temperature and humidity ranges by optimizing operations for current conditions rather than relying on fixed optimal ranges.
3Device complexity
If conventional drying methods are used without constant monitoring, then device complexity is reduced, but energy wastage increases due to lack of completion indication
Solution Approach 1:
The system employs sensors and control logic that continuously monitor temperature and humidity to detect when drying completion criteria are met. This feedback mechanism provides clear indication of drying completion, allowing the system to shut down automatically and prevent energy wastage, while the complexity remains manageable through standardized sensing and control components.
Solution Approach 2:
The drying system performs self-monitoring and self-regulation, automatically detecting drying completion and terminating operation without external intervention. This self-service capability eliminates energy wastage from prolonged operation while maintaining relatively simple device architecture through the use of basic sensors and automated control logic.
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 approach reduces energy consumption and drying time, minimizing secondary damage by efficiently managing temperature and humidity, ensuring faster room drying with reduced energy expenditure.
Implementation Method 1
heating the air in the room and circulating said heated air around the room
Implementation Method 2
surface evaporation of water in the room
Implementation Method 3
circulating said heated air around the room
Data Source
AI summary
A drying apparatus for temporary location within a damp or waterlogged room is disclosed. The apparatus includes sensors to sense the level of temperature and humidity within the room, a heater to provide heat for the room, an air circulation fan for selectively circulating heated air within the room or selectively exhausting warm and humid air from the room and for allowing outside ambient air into the room. The apparatus being adapted to cyclically continue until the sensed humidity reaches a required level, the apparatus thereafter indicating, directly or indirectly, the completion of the drying process. A method of drying a room using such apparatus is also disclosed which employs a technique whereby the rate of change of the temperature increase is used to determine when humid air should be exhausted from the room. A time limit can also be use to determine when said exhausting takes place.