Plenum Flooring Ventilation for Poultry Houses
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Solution Overview
Problem
Current ventilated plenum flooring systems in poultry housing units fail to maintain consistent surface temperatures and effective manure moisture control, leading to increased energy usage, potential for bird health issues like foot pad dermatitis, and reduced system longevity.
Innovation Solution
A plenum flooring ventilation system with air intake openings along the perimeter, a blower for continuous air flow, and refrigerated dehumidifiers/air circulation units to promote uniform surface temperatures and moisture removal, combined with high-efficiency insulation to minimize thermal losses and prevent condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If plenum flooring system is used as alternative to litter, then ammonia production is reduced and pathogen infestation decreases, but consistent flooring temperature and manure moisture control are not achieved
Solution Approach 1:
The patent applies pneumatic principles by using a blower to force air through the plenum space beneath the flooring panels. This pressurized air flow creates positive pressure that prevents manure and moisture from wicking upward into the plenum space, while also providing uniform thermal distribution across the flooring surface to maintain consistent temperatures for bird comfort.
Solution Approach 2:
The system changes the physical parameters of the plenum space by introducing pressurized air flow, which alters the pressure differential between the plenum space and the housing unit atmosphere. This parameter change prevents capillary action that would otherwise draw moisture into the plenum, while also using the air flow's thermal energy to maintain uniform flooring temperatures.
2Object-generated harmful factors
If plenum flooring system is used as alternative to litter, then ammonia production is reduced and pathogen infestation decreases, but manure moisture control is insufficient
Solution Approach 1:
The patent uses pneumatic pressure by forcing air through the plenum space at controlled rates. This pressurized air flow creates a pressure barrier that prevents moisture-laden air from being drawn up through the flooring panels via capillary action, thereby maintaining effective manure moisture control while still achieving the ammonia reduction benefits of plenum flooring.
3Temperature
If conventional heaters are used with plenum flooring, then bird comfort is attempted to be maintained, but energy usage increases and system component longevity decreases
Solution Approach 1:
The system performs self-service by using the ventilation air itself as the heating medium. The air circulating through the plenum space naturally distributes thermal energy across the flooring surface, eliminating the need for separate heating systems. This self-heating mechanism maintains bird comfort while dramatically reducing energy consumption compared to conventional heater systems.
Solution Approach 2:
The ventilation system serves multiple functions simultaneously: it provides air circulation for moisture removal, creates positive pressure to prevent manure wicking, and distributes thermal energy for floor heating. This multi-functionality eliminates the need for dedicated heating equipment, reducing both energy usage and system complexity.
4Quantity of substance
If thin moisture barrier is used in plenum flooring, then some moisture protection is provided, but condensation buildup occurs in plenum space reducing manure drying efficiency
Solution Approach 1:
The patent uses pneumatic pressure to force air flow through the plenum space, creating positive pressure that actively prevents moisture-laden air from condensing within the plenum. This pressurized air flow continuously sweeps through the plenum space, preventing condensation buildup on the moisture barrier and maintaining high manure drying efficiency.
Solution Approach 2:
The system implements continuous air circulation through the plenum space, ensuring that the protective action against condensation is ongoing rather than intermittent. This continuous air flow constantly prevents moisture accumulation and condensation on the moisture barrier, maintaining consistent manure drying performance throughout operation.
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 solution achieves uniform flooring surface temperatures, effective manure drying, and reduced energy consumption, enhancing bird comfort and health while extending system component longevity.
Implementation Method 1
A blower is provided to force air flow through the flooring segments plenum space
Implementation Method 2
refrigerated dehumidifiers/air circulation units to promote uniform surface temperatures and moisture removal
Implementation Method 3
combined with high-efficiency insulation to minimize thermal losses and prevent condensation
Implementation Method 4
Inconsistent flooring temperatures could not be alleviated by variations in the direction or rate of plenum ventilation flow
Data Source
AI summary
A plenum flooring system installed over high density insulation panels, preventing heat loss to ground and intrusion of ground moisture. The system includes one or more flooring segments, each containing at least one surface opening to the plenum space, and a plenum ventilation system. The ventilation system includes a blower and air inlet openings in seals arranged along the perimeter of the plenum flooring segments at the walls of the interior of a poultry house. The blower withdraws air from the plenum space through the surface opening of the flooring segment and discharges it into the poultry house, creating a continuous flow of air to maintain uniform flooring surface temperatures and remove moisture that migrates to the plenum space from manure on the perforated flooring surface due to moisture gradient, then a refrigerated dehumidifier/air circulation unit to condense moisture in the air and discharges that liquid to the house exterior.