Low-Dew-Point Air Dehumidification With Modular Regeneration
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Solution Overview
Problem
Conventional dehumidification systems using desiccants like silica gel or zeolites require significant energy for regeneration due to the need for heating to high temperatures, leading to high energy costs.
Innovation Solution
An air dehumidification system with modules containing water capture materials, utilizing a heat pump for heating and cooling to desorb and condense water vapor, allowing concurrent operation of modules in adsorption and desorption modes to reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional desiccants (silica gel or zeolites) are used for dehumidification, then low dew point airflow can be achieved, but substantial energy is required for regeneration at elevated temperatures above 200°C
Solution Approach 1:
The system divides the dehumidification process into multiple modules (at least two modules) that can operate independently in adsorption or desorption modes. This segmentation allows continuous dehumidification while one module is being regenerated, reducing the overall energy requirement compared to conventional single-system regeneration at high temperatures.
Solution Approach 2:
The invention changes the operating parameters of the desiccant regeneration process by using lower temperatures (below 200°C) through the use of multiple modules operating in sequence. The system maintains effective dehumidification performance while operating at reduced thermal energy input by alternating between adsorption and desorption modes across different modules.
2Loss of substance
If desiccant regeneration is performed by heating air to above 200°C, then water can be removed from the desiccant, but substantial energy expenditure occurs
Solution Approach 1:
The system employs periodic action by alternating between adsorption mode (where fresh desiccant captures moisture) and desorption mode (where saturated desiccant is regenerated). This periodic operation allows the desiccant to be regenerated at lower temperatures over time, reducing the instantaneous energy requirement compared to continuous high-temperature heating.
Solution Approach 2:
The multi-module design ensures continuity of useful action by maintaining at least one module in adsorption mode while another undergoes desorption. This continuous operation eliminates the need to shut down the dehumidification process for regeneration, maintaining productivity while reducing peak energy demands through lower temperature regeneration cycles.
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 achieves low dew points and reduced energy costs by efficiently adsorbing and desorbing water vapor, meeting the requirements of various processes while minimizing energy expenditure.
Implementation Method 1
a plurality of modules (3) each containing a water capture material (4) that adsorbs water (5) from a supply airflow (6)
Implementation Method 2
a heating source (8) that heats the recirculated airflow (11) to desorb water vapor (9) from the water capture material (4)
Implementation Method 3
a cooling source (12) that cools the recirculated airflow (11) to condense the water vapor (9) into liquid water (25)
Data Source
AI summary
Generally, an air dehumidification system useful in dehumidifying gases to produce gases having low dew points. Specifically, an air dehumidifier and methods of making and using an air dehumidifier including a plurality of modules each containing a water capture material which absorbs water from a supply airflow in an adsorption mode and releases water vapor in a desorption mode, wherein one or more of the plurality of modules concurrently operate in the adsorption mode to reduce the dew point of the supply airflow as one or more of the plurality of modules operate in the desorption mode to regenerate the water capture material.