CAPSTONE/SENIOR DESIGN EXPERIENCE 2019 Hog Cooling Pad System Travis Wehr (ASM), Zane Herr (ASM), Aaron Meyer (ASM) Sponsor: Dr. Allan Schinkel Dr. Robert Stwalley Technical Advisor: Stan Harlow Instructors: Dr. John Evans Acknowledgements: Martin King, Legacy Chillers Criteria: • Design a closed system that recirculates the water • Design should be available for both new and existing buildings • Choose from a variety of given systems Impact: • Reduce sow loss • Increased sow feed intake • Increased pig wean weight • Potential decreased of weaned pig loss Decision Matrix Solutions Safety Sustainability Cost Management Viability Score Scores 0.1 0.4 0.1 0.3 0.1 Vertical Geothermal 9 0.9 8.5 3.4 5 0.5 9 2.7 9 0.9 8.4 Horizontal Geothermal 9 0.9 8.5 3.4 8 0.8 9 2.7 9 0.9 8.7 Chiller 9 0.9 9 3.6 8.5 0.85 9 2.7 9 0.9 8.95 Pit Cooled 1 0.1 8 3.2 9 0.9 2 0.6 1 0.1 4.9 Peltier Chips 7.5 0.75 6.5 2.6 9.5 0.95 8 2.4 2 0.2 6.9 Background: • After years of research Purdue teams have developed a cooling pad to be used in farrowing buildings that can lower discomfort of the sows and potentially increase productivity. Problem Statement: • Purdue Animal Science and ABE need a system for their Hog Cooling Pad project that recycles the warm water from the cooling pads instead of discharging it as waste. Future Validation Tests: • Place three temperature sensors on loop between pads • Temperature sensor on entering and exiting pad water • Flow meters on each pad Economic Analysis: • Average cost per pad- $280 • Chiller cost per crate - $376 (240 pads) • If average piglet per litter increases by 0.5 pigs the system is financially viable • Rate of return on system is 1-2 years with potential decrease in piglet loss • System is not financially viable if increased sow longevity/ decreases sow loss are the only found advantages with the system • Solution: • Air cooled water chiller • Most efficient and economical option • Most easily placed in new or existing buildings • Life span of 15+ years Cooling Pad Proposed barn design for 240 crates Legacy Air Cooled Chiller $300 $400 $500 $600 $700 $800 $900 0 50 100 150 200 250 300 Cost per Crate Number of Crates Chiller Cost Per Crate
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C A P S TO N E / S E N I O R D E S I G N E X P E R I E N C E 2 0 1 9
Hog Cooling Pad SystemTravis Wehr (ASM), Zane Herr (ASM), Aaron Meyer (ASM)
Sponsor:
Dr. Allan Schinkel
Dr. Robert Stwalley
Technical Advisor:
Stan Harlow
Instructors:
Dr. John Evans
Acknowledgements:
Martin King, Legacy Chillers
Criteria:• Design a closed system that recirculates the water
• Design should be available for both new and existing buildings
• Choose from a variety of given systems
Impact:• Reduce sow loss
• Increased sow feed intake
• Increased pig wean weight
• Potential decreased of weaned pig loss
Decision MatrixSolutions Safety Sustainability Cost Management Viability ScoreScores 0.1 0.4 0.1 0.3 0.1
Vertical Geothermal
9 0.9 8.5 3.4 5 0.5 9 2.7 9 0.9 8.4
Horizontal Geothermal
9 0.9 8.5 3.4 8 0.8 9 2.7 9 0.9 8.7
Chiller 9 0.9 9 3.6 8.5 0.85 9 2.7 9 0.9 8.95Pit Cooled 1 0.1 8 3.2 9 0.9 2 0.6 1 0.1 4.9Peltier Chips 7.5 0.75 6.5 2.6 9.5 0.95 8 2.4 2 0.2 6.9
Background:• After years of research Purdue teams have developed a
cooling pad to be used in farrowing buildings that can lower discomfort of the sows and potentially increase productivity.
Problem Statement:• Purdue Animal Science and ABE need a system for their Hog
Cooling Pad project that recycles the warm water from the cooling pads instead of discharging it as waste.
Future Validation Tests:• Place three temperature
sensors on loop between pads
• Temperature sensor on entering and exiting pad water
• Flow meters on each pad
Economic Analysis:• Average cost per pad- $280• Chiller cost per crate - $376 (240 pads)• If average piglet per litter increases by
0.5 pigs the system is financially viable• Rate of return on system is 1-2 years
with potential decrease in piglet loss• System is not financially viable if
increased sow longevity/ decreases sow loss are the only found advantages with the system
•Solution:• Air cooled water chiller• Most efficient and economical option• Most easily placed in new or existing
buildings• Life span of 15+ years
Cooling Pad
Proposed barn design for 240 crates
Legacy Air Cooled Chiller $300
$400
$500
$600
$700
$800
$900
0 50 100 150 200 250 300
Co
st p
er C
rate
Number of Crates
Chiller Cost Per Crate
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