Plant Dehydration Ductwork for Low-Temperature Moisture Removal
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Solution Overview
Problem
Existing dehydration methods for organic materials, such as cannabis, are inefficient at scale, often damaging the material's quality, require excessive energy, and risk microbial growth, while traditional methods like high-temperature drying and freeze drying are costly or ineffective in differentiating between free and bound water.
Innovation Solution
A controlled dehydration system with a housing structure and ductwork design that introduces low-temperature, low-humidity air to create a vapor pressure deficit, using recirculation and exhaust vents to efficiently remove free water while preserving bound water, maintaining product quality and preventing microbial growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high air temperatures are used to draw out moisture, then dehydration efficiency is improved, but the organic material's desirable properties are damaged and energy consumption increases
Solution Approach 1:
The patent changes the dehydration parameters from high temperature to low temperature operation, using temperatures below 70°F to remove moisture while preserving the organic material's desirable properties such as flavor, color, and aromatic compounds
Solution Approach 2:
The patent utilizes the phase transition of water from liquid to vapor through controlled evaporation at low temperatures, creating a vapor pressure deficit that drives moisture removal without requiring high thermal energy input
2Productivity
If high air temperatures are used to draw out moisture, then dehydration efficiency is improved, but energy consumption increases
Solution Approach 1:
The patent operates the dehydration system at low temperatures below 70°F, dramatically reducing the energy input required compared to traditional high-temperature drying methods while maintaining effective moisture removal through vapor pressure differential
Solution Approach 2:
The patent replaces the thermal mechanism (heat-driven evaporation) with a vapor pressure differential mechanism, using cold dry air to create a gradient that drives moisture removal without requiring high energy input
3Reliability
If hang drying is used to maintain high humidity, then microbial growth is prevented, but drying time increases and space requirements increase
Solution Approach 1:
The patent changes the humidity parameter from high (50-55% in hang drying) to low (below 30% relative humidity), creating an environment that prevents microbial growth while accelerating the dehydration process through increased vapor pressure deficit
Solution Approach 2:
The patent implements continuous air circulation through recirculation ducts and exhaust vents, maintaining constant movement of dry air through the chamber to continuously drive moisture removal and prevent stagnant conditions that could promote microbial growth
4Productivity
If hang drying is used, then space and labor requirements increase, but dehydration can be achieved
Solution Approach 1:
The patent uses porous drying chambers with extensive surface area for air circulation, allowing efficient moisture removal in a compact space through optimized airflow patterns and recirculation systems
Solution Approach 2:
The patent transitions from three-dimensional hang drying space to a more compact chamber-based system with optimized internal airflow dimensions, reducing the overall space footprint while maintaining dehydration effectiveness
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 removes over 80% of free water from organic materials while preserving bound water, ensuring high product quality and weight, reducing energy consumption, and preventing microbial growth, thus maximizing commercial value.
Implementation Method 1
inflow of dry air into the drying chamber provides a temperature of below 70 degrees Fahrenheit and a relative humidity level of less than 30% in the air surrounding the hemp plants, and the relative humidity level results in a vapor pressure deficit in the air that causes free water to escape from the hemp plants
Data Source
AI summary
A system for dehydration of organic material comprises a housing structure having an interior chamber, a supply duct, a dual trunk structure, a dry air intake, a central recirculation duct, and a plurality of side recirculation ducts. The side recirculation ducts each have a return plenum extending downward from a top recirculation duct and are configured to recirculate interior air contained in the chamber. The interior air enters the side recirculation ducts through the return plenums and is pushed upward and outward through the top recirculation ducts and back into the interior chamber. The interior chamber has a plurality of exhaust vents positioned in the upper region of its walls. A plurality of portable platforms positioned inside the interior chamber are configured to hold the organic material. The floor of the housing structure can include a plurality of tracks for loading, unloading and positioning the portable platforms.