Vertical Hydroponic Tray Stacking with Counter-Rotating Fans
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Solution Overview
Problem
Conventional hydroponic systems face challenges in efficiently distributing plant nutrient solutions and providing optimal air flow to plants, leading to issues like calcium deficiency and unwanted algae growth, which can affect plant health and yield.
Innovation Solution
A multi-level hydroponic system with vertically stacked tray assemblies, where each tray is oriented 180° relative to the one above it, featuring a nutrient reservoir, distribution system with flow restrictors, and an air flow generation and distribution system using counter-rotating fans to pressurize a plenum, providing targeted air flow and reducing temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hydroponic systems are used, then plant cultivation is achieved, but nutrient distribution is inefficient and air flow is insufficient
Solution Approach 1:
The system is divided into multiple vertical stacks, each containing separate tray assemblies for different plant types. Each stack operates independently with its own nutrient distribution and air flow systems, allowing optimized cultivation conditions for each segment while maintaining overall system productivity.
Solution Approach 2:
The system transitions from horizontal nutrient distribution to vertical stacking, utilizing the vertical dimension to increase plant cultivation capacity without expanding horizontal footprint. Nutrient solutions and air flows are distributed vertically through dedicated channels and plenums, enabling efficient resource delivery to multiple levels simultaneously.
2Reliability
If continuous pump operation is used, then consistent nutrient delivery is achieved, but energy consumption increases
Solution Approach 1:
The nutrient pump operates intermittently rather than continuously, delivering nutrient solutions in periodic cycles. Flow restrictors maintain consistent nutrient flow to plants during each cycle, ensuring reliable delivery while allowing the pump to rest between cycles, thereby reducing overall energy consumption.
Solution Approach 2:
The system incorporates feedback mechanisms where nutrient flow is regulated based on plant needs and system conditions. Flow restrictors automatically adjust nutrient delivery rates, and the pump operation is controlled based on reservoir levels and plant uptake requirements, optimizing both reliability and energy efficiency.
3Reliability
If air flow is increased to prevent calcium deficiency, then plant health improves, but energy consumption increases
Solution Approach 1:
The air flow system is segmented into multiple plenums, with each plenum serving specific trays or plant zones. This allows differential air flow rates to be applied to different plant types and growth stages, providing necessary air circulation for calcium uptake and plant health while minimizing overall energy consumption by not uniformly high-flowing the entire system.
Solution Approach 2:
Air flow characteristics are optimized locally for each plant zone based on specific requirements. Some areas receive higher air flow to prevent calcium deficiency and promote transpiration, while other areas receive adequate but lower flow. This localized optimization maintains plant health while reducing total energy consumption compared to uniform high air flow throughout.
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 configuration ensures consistent nutrient delivery and improved air circulation, reducing calcium deficiency and algae growth, while allowing for intermittent pump operation and reduced energy consumption, enhancing plant health and yield.
Implementation Method 1
an air flow generation and distribution system using counter-rotating fans to pressurize a plenum, providing targeted air flow
Implementation Method 2
the air that escapes the openings expands causing a decrease in the air temperature in the vicinity of the plenum
Implementation Method 3
the plant nutrient solution travels through the outlets on the distribution reservoir gravitationally through a flow restrictor and into a feed reservoir
Data Source
AI summary
Tray assemblies organized in a vertical stack with a grow light positioned above each. Plant nutrient solution flows into a feed reservoir positioned in a first end of the top assembly. When plant nutrient solution reaches the level of outlets positioned in a sidewall of the feed reservoir, it flows into longitudinal channels positioned on the tray assembly. A collection reservoir at a second end of the tray assembly collects excess solution from the channels. A lip positioned between the channels and the collection reservoir retains some of the solution in the channels so it is available to plants held by the tray assembly. Excess solution flows from the collection reservoir of the top tray assembly to a feed reservoir serving the next tray assembly in the stack. The pattern is repeated while alternating the orientation of each tray assembly such that solution is provided to each tray assembly.