Segmented Floor Cooling Panel for Sow Heat Stress Reduction
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Solution Overview
Problem
Modern hog farrowing operations face challenges in maintaining optimal temperatures for both piglets and sows, leading to increased heat stress and reduced reproductive performance in sows due to elevated ambient temperatures, as current cooling systems are inefficient and fail to adjust cooling relative to the animal's heat production and environmental conditions.
Innovation Solution
A cooling system comprising a metallic panel with a thermally conductive cooling element and a coolant flow system that actively cools the animal by reducing the temperature of the panel's surface, allowing for adjustable cooling based on the animal's heat production and environmental conditions, using a control unit to monitor and regulate coolant flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If floor cooling systems are embedded to reduce heat stress on sows, then sow productivity and reproductive performance improve, but heat transfer efficiency from the sow remains insufficient
Solution Approach 1:
The cooling system is segmented into multiple independent cooling channels or zones within the floor structure, allowing targeted cooling under different body regions of the sow. This segmentation increases the effective heat transfer surface area and enables adaptive cooling distribution based on local heat generation patterns, thereby improving overall heat transfer efficiency while maintaining sow productivity.
Solution Approach 2:
The cooling system transitions from a traditional two-dimensional surface cooling approach to a three-dimensional volumetric cooling structure with multiple levels of cooling channels. This dimensional expansion increases the contact surface area between the cooling medium and the sow's body heat, significantly enhancing heat transfer efficiency while maintaining system reliability for improving reproductive performance.
2Reliability
If ambient temperature is maintained at 25°C to promote piglet survival, then piglet survival rates improve, but sow heat stress increases and reproductive performance declines
Solution Approach 1:
The system applies local quality by providing targeted cooling specifically to the sow's body regions that generate the most heat (such as the lateral surfaces and abdominal area) while maintaining the ambient temperature at 25°C for piglet survival. This localized cooling approach reduces sow heat stress without altering the overall environmental temperature, thus preserving piglet survival rates while improving sow reproductive performance.
Solution Approach 2:
The floor cooling system acts as an intermediary between the sow and the ambient environment, providing a thermal interface that transfers excess heat from the sow to a cooling medium flowing through the floor channels. This intermediary cooling mechanism allows the ambient temperature to remain at 25°C for piglet survival while the sow experiences reduced thermal stress through the mediating cooling floor.
3Productivity
If cooling systems are made adjustable relative to animal heat production, then cooling efficiency improves, but system complexity increases
Solution Approach 1:
The cooling system incorporates feedback mechanisms through temperature sensors that monitor the thermal state of the sow or the cooling medium temperature. This feedback information is used to automatically adjust the cooling medium flow rate or temperature, enabling the system to adapt to varying animal heat production levels. The feedback control improves cooling efficiency while keeping the control system relatively simple through automated rather than manual adjustment.
Solution Approach 2:
The cooling system is designed to be self-regulating through passive thermal feedback mechanisms, where the temperature difference between the sow and the cooling medium automatically drives the cooling process. As the sow generates more heat, the increased temperature gradient naturally enhances heat transfer to the cooling medium, providing self-adjusting cooling efficiency without requiring complex external control systems.
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 reduces the animal's body temperature, improving its well-being and reproductive performance by actively cooling it relative to ambient temperatures, while being economical and responsive to varying conditions.
Implementation Method 1
at least one metallic cooling element that thermally contacts the lower surface of the metallic panel and has an internal passage therein, and means for flowing a coolant through the internal passage of the metallic cooling element. Flow of the coolant through the metallic cooling element reduces the temperature of the upper surface of the metallic panel
Data Source
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AI summary
Systems and methods for cooling an animal are provided to actively cool an animal relative to ambient environmental temperature. The systems include a metallic panel having an upper surface for contacting the animal and a lower surface, at least one metallic cooling element thermally contacting the lower surface of the metallic panel and having an internal passage therein, and means for flowing a coolant through the internal passage of the cooling element. Flow of the coolant through the cooling element reduces the temperature of the upper surface of the metallic panel and thereby reduces the body temperature of the animal when the animal is in contact with the metallic panel.