10 Steps to Drier Houses & Better Paw Quality Jess Campbell & Jim Donald - Auburn University National Poultry Technology Center 1 Paw Q Story 2 Step 1 Manage Moisture Summer Control Winter Control Maintain 50-70% RH Get A Meter Litter Thickness & Quality 1
High Moisture Indicators Condensation Dank sour smell Ceiling dripping 5 Primary Moisture Removal Tool Effective Ventilation 2
Secondary Moisture Removal Tool tractor How Much Moisture 2:1 FC 4:1 WR 1,000 55 Gallon Drums Starts With Good Bedding Manage Moisture Between Flocks Manage Drinkers And Pressure Exhaust Must Carry Out Moisture Must Get Moisture Into House Air If We Don t Ventilate Efficiently We Will Fail Water Usage (24,000 Broilers) GAL/DAY WEEK 1 = 259 WEEK 2 = 475 WEEK 3 = 821 WEEK 4 = 1,210 WEEK 5 = 1,584 WEEK 6 = 1,872 WEEK 7 = 1,987 80% 207 380 657 968 1,267 1,498 1,590 3
Thermal Image of Litter Problems with Drinkers Don t Help Step 2 Ventilation Setup Inlet Opening Pressure Vent Door Management 4
Proper Management - Understanding How to Achieve Our Goal How many do I need Should I use them all When do I close some When do I open some How far should vents be open to get good throw Sidewall Ceiling What are typical winter SP ranges.11 ---.08.13 ---.07 Proper Inlet Opening = Effective Ventilation Are We Ventilating? Static Temp Air Mixing Moisture Litter Quality Must Have the 3 Proper Inlet Video 5
Poor Inlet Opening = Poor Ventilation Are We Ventilating? Static Good? Temp Good? Air Mixing Poor Moisture Removal? Litter Quality Poor Where is the Air Landing? Poor Inlet Video Step 3 Stop Air Infiltration House Tightness Temperature Litter House Tightness Test Locate Leaks 6
Air Infiltration Video Conduct A Tightness Test Close Up The House Turn on 20,000 cfm 2-36 Fans or 1-48 Fan 1 cfm/sqft in larger houses Measure Static Pressure With Magnahelic Gauge <0.10 in high ceilings <0.15 in low ceilings What Does This Tell Us? 7
Leakage Area vs. Static Pressure OLD RETROFIT NEW 0.01 = 60ft 2 0.02 = 45ft 2 0.03 = 35ft 2 0.04 = 28ft 2 0.05 = 25ft 2 0.06 = 21ft 2 0.07 = 20ft 2 0.08 = 18ft 2 0.09 = 17ft 2 0.10 = 16ft 2 0.11 = 15ft 2 0.12 = 14ft 2 0.13 = 13ft 2 0.14 = 12ft 2 0.15 = 11ft 2 0.16 = 11ft 2 0.17 = 10ft 2 0.18 = 10ft 2 0.19 = 9ft 2 0.20 = 9ft 2 0.21 = 8ft 2 0.22 = 8ft 2 0.23 = 7ft 2 0.24 = 7ft 2 0.25 = 6ft 2 0.26 = 6ft 2 0.27 = 5ft 2 0.28 = 5ft 2 0.29 = 4ft 2 0.30 = 4ft 2 VERY LEAKY TIGHT VERY TIGHT ORIGINAL WORK BY UGA MIKE CZARICK Step 4 Use Stir Fans Reduce Stratification Floor Uniformity Moisture Removal Improved Litter Q Improved Perf Improved Paws Heat Stratification Video 8
Temperature Stratification 25 Basket Fan Smoke Video 26 40 x 500 w/ 18-20 Basket Fans 40 x 500 = 20,000 ft 2 x 9.5 = 190,000 ft 3 190,000 ft 3 x 10% = 19,000 ft 3 of air 50 50 50 50 50 60 60 60 60 Brooding Chamber Off End 19,000 ft 3 / 2,500 cfm fan = 7.6 fans or 8 Alternate Spacing/Arrangement Acceptable 9
The Effect of Recirculation Fans in a Tight House Step 5 Seal Tunnel Curtains Brooding Leaks Heaters Floor Temps Uniformity Step 6 Seal Fan Shutters Off-End Fan Shutters Plastic Bonnets Curtains 10
Fan and Shutter Covers Damaged Fan Shutter ORIGINAL WORK BY UGA MIKE CZARICK 33 11
Step 7 Calculate Fan Run Times Calculate Adjust Monitor Increase Revisit Go to poultryhouse.com for runtime calculator More Water = More Ventilation Bird age/weeks Average gallons/day Minimum cfm/bird 1 259 0.10 2 475 0.25 3 821 0.35 4 1,210 0.50 5 1,584 0.65 6 1,872 0.70 7 1,987 0.80 Example Per-Bird Ventilation Rates For Moisture Removal Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 0.10 cfm 0.25 cfm 0.35 cfm 0.50 cfm 0.65 cfm 0.70 cfm 0.80 cfm 0.90 cfm 24,000 Birds 2 Weeks Old Need.25 Cfm Per Bird 24,000 X.25 = 6,000 Cfm Using 2-36 Inch Fans 6,000/18,000 = 33% On Time 100 ON /200 OFF Using 3-36 Inch Fans 6,000/27,000=22% On Time 60 ON /240 OFF Be Observant Add More If Needed See Newsletter 12
Step 8 Check Ceiling Insulation Cellulose Fiberglass Shifting Adding Heat Loss (2,000 x 60) / 1 = 120,000 BTU s/hr Lost (18,000 x 60) / 10 = 108,000 BTU s/hr Lost 13
R-19 Fiberglass Roll Insulation Blown Fiberglass Insulation 41 Step 9 Off End Management Brooding Humidity Vents Fans Heaters Stir Fans Curtain 14
43 Step 10 Leave Heat On Brooding Bird Heat Turn Out Background Heat Monitor RH & Adjust Vent Door Management House Tightness Stir Fans Ceiling Insulation Water Lines Summary More Hands-on Training 45 15
Thank You Questions & Comments? Jess Campbell, Poultry Housing Specialist jesscamp@aces.edu or 334-844-3546 www.poultryhouse.com 46 47 Inlet Management -TEMP CONTROL BY AIR CHANGE & BLENDING Air Mixing Temperature Moisture Removal Fuel Use 48 16
Measuring Relative Humidity Ounces of Water in 1,000ft 3 of Air at Different Temperatures and RH Air Temperature RH 30 F 40 F 50 F 60 F 70 F 80 F 90 F 10% 0.4 0.6 0.9 1.3 1.8 2.4 3.3 20% 0.9 1.3 1.8 2.6 3.5 4.9 6.6 30% 1.3 1.9 2.7 3.8 5.3 7.3 9.9 40% 1.7 2.5 3.6 5.1 7.1 9.7 13.2 50% 2.1 3.2 4.5 6.4 8.9 12.2 16.5 60% 2.6 3.8 5.4 7.7 10.7 14.6 19.8 70% 3.0 4.4 6.3 8.9 12.4 17.0 23.0 80% 3.4 5.0 7.2 10.2 14.2 19.5 26.3 90% 3.8 5.7 8.1 11.5 16.0 21.9 29.6 100% 4.3 6.3 9.0 12.8 17.8 24.3 32.9 50 CFM Per Bird Days Age Total CFM On 5-min Timer with Fan Power 0.10 1-7 2,000 0.5 min (1-48 ) 0.25 8-14 5,000 1.25 min (1-48 ) 0.35 15-21 7,000 1.17 min (48 +36 ) 0.50 22-28 10,000 1.67 min (48 +36 ) 0.65 29-35 13,000 1.63 min (2-48 ) 0.70 36-42 14,000 1.75 min (2-48 ) 0.80 43-49 16,000 2.00 min (2-48 ) 0.90 50-56 18,000 2.25 min (2-48 ) 17
Timer Adjustments for Conditions (based on using a five-minute timer) For slight ammonia add 15 seconds For heavy ammonia add 30 seconds For high moisture add 15 seconds For dust subtract 15 seconds 18
DRY LITTER 19