v4i6 1 |
Previous | 1 of 6 | Next |
|
small (250x250 max)
medium (500x500 max)
Large
Extra Large
large ( > 500x500)
Full Resolution
All (PDF)
|
This page
All
|
connec t ion Poultry Stress Management how long they need to run their fans,” Freking said. “This helps to avoid the deadly combination of heat and humidity.” Weather data is very important to help determine the need and type of evaporative cooling system to use in an area. The most crucial weather factors that help determine the need for evaporative cooling systems is prevailing high temperatures with high relative humidity. According to Jim Donald, P.E., Professor and Extension Engineer at Auburn University, “The goal of evaporative cooling in a tunnel house is to get inside air temperature down to the range (80°-84°F) where wind-chill cooling can keep birds comfortable. The relative humidity of air determines the theoretical cooling potential available. The most critical weather factor in making evaporative cooling system decisions is how hot it gets for how long, and what the relative humidity tends to be at these times. The higher the temperature and the lower the relative humidity, the more need for cooling and the more effective evaporative cooling can be.” Freking added, “The best thing about the Mesonet is all the houses have to be designed based on local weather, so the engineers rely on your products heavily.” Volume 4 — Issue 5 — June 2013 www.mesonet.org THE MESONET PROVIDES VITAL products to help Oklahoma poultry producers monitor specific weather data. High temperatures, humidity and dewpoint can all have a negative effect on bird performance. Luckily, evaporative cooling systems in tunnel ventilated broiler houses help with this problem. “Things have changed over the last ten years,” said Brian Freking, OSU Southeast Area Extension Livestock Specialist. “Twenty years ago, one way they cooled the birds down is by keeping track of temperature and humidity. If it was 80 degrees with 80 percent humidity, they would start losing chickens. Now, they have controllers in the chicken houses, and they use a system that is called tunnel ventilation. It is a wind tunnel that pulls in air from an opening and runs the air through wetted cardboard, known as evaporative cooling. So wind speed is important as well. The most efficient system can drop temperatures 20 degrees.” Freking says it is also important to monitor dewpoint because poultry houses need to stay dry inside. The Mesonet’s Temperature/RH/Dewpoint Graph is a great tool to monitor all three weather variables. “Poultry growers can use your (the Mesonet’s) tool to figure –by Stephanie Bowen This particular research house at The University of Georgia Poultry Research Farm consists of two 100’ X 40’ environmentally controlled rooms. Exaust fans are located in the end walls and a series of “european style” air inlets are located along each side wall. Evaporative cooling pads are located in a plenum wall located approxiamtely 2’ from the building side wall. The plenum wall provides both cooling of the incoming air as well as light control. The Mesonet’s Temperature/RH/Dewpoint Graph is used in multiple areas in the agriculture industry. For example, it is used during hay baling season. These variables impact the hay’s moisture content which is important to succesfully bale, and it impacts the hay’s value as well. To view this graph, visit www.mesonet.org, and click on ‘Agriculture’ in the top menu. Then select one of the following from the sub-menu: Crop - Grass Hay or Alfalfa Livestock - Poultry Range/Forest - Rangeland or Forestry
Object Description
Okla State Agency |
Climatological Survey, Oklahoma |
Okla Agency Code | 'CLI' |
Title | Mesonet connection, 06/2013, v.4 |
Authors |
Oklahoma Climatological Survey. |
Publication Date | 2013-06 |
Publication type | Newsletter |
Purpose | Poultry Stress Management by Stephanie Bowen; Mesonet in Pictures: Temp/RH/Dew Graph, Relative Humidity, Dewpoint Depression, Dewpoint Temperature; Wringing Over the Ring by Kevin Kloesel; A May to Remember by Gary McManus; |
Notes | issue mislabeled v.4 no.5 |
For all issues click |
C2800.6 M582c |
Digital Format | PDF, Adobe Reader required |
ODL electronic copy | Downloaded from agency website: http://www.mesonet.org/mesonet_connection/v4i6.pdf |
Rights and Permissions | This Oklahoma state government publication is provided for educational purposes under U.S. copyright law. Other usage requires permission of copyright holders. |
Month/year uploaded | June 2013 |
Date created | 2014-10-08 |
Date modified | 2014-10-08 |
OCLC number | 890224322 |
Description
Title | v4i6 1 |
Full text | connec t ion Poultry Stress Management how long they need to run their fans,” Freking said. “This helps to avoid the deadly combination of heat and humidity.” Weather data is very important to help determine the need and type of evaporative cooling system to use in an area. The most crucial weather factors that help determine the need for evaporative cooling systems is prevailing high temperatures with high relative humidity. According to Jim Donald, P.E., Professor and Extension Engineer at Auburn University, “The goal of evaporative cooling in a tunnel house is to get inside air temperature down to the range (80°-84°F) where wind-chill cooling can keep birds comfortable. The relative humidity of air determines the theoretical cooling potential available. The most critical weather factor in making evaporative cooling system decisions is how hot it gets for how long, and what the relative humidity tends to be at these times. The higher the temperature and the lower the relative humidity, the more need for cooling and the more effective evaporative cooling can be.” Freking added, “The best thing about the Mesonet is all the houses have to be designed based on local weather, so the engineers rely on your products heavily.” Volume 4 — Issue 5 — June 2013 www.mesonet.org THE MESONET PROVIDES VITAL products to help Oklahoma poultry producers monitor specific weather data. High temperatures, humidity and dewpoint can all have a negative effect on bird performance. Luckily, evaporative cooling systems in tunnel ventilated broiler houses help with this problem. “Things have changed over the last ten years,” said Brian Freking, OSU Southeast Area Extension Livestock Specialist. “Twenty years ago, one way they cooled the birds down is by keeping track of temperature and humidity. If it was 80 degrees with 80 percent humidity, they would start losing chickens. Now, they have controllers in the chicken houses, and they use a system that is called tunnel ventilation. It is a wind tunnel that pulls in air from an opening and runs the air through wetted cardboard, known as evaporative cooling. So wind speed is important as well. The most efficient system can drop temperatures 20 degrees.” Freking says it is also important to monitor dewpoint because poultry houses need to stay dry inside. The Mesonet’s Temperature/RH/Dewpoint Graph is a great tool to monitor all three weather variables. “Poultry growers can use your (the Mesonet’s) tool to figure –by Stephanie Bowen This particular research house at The University of Georgia Poultry Research Farm consists of two 100’ X 40’ environmentally controlled rooms. Exaust fans are located in the end walls and a series of “european style” air inlets are located along each side wall. Evaporative cooling pads are located in a plenum wall located approxiamtely 2’ from the building side wall. The plenum wall provides both cooling of the incoming air as well as light control. The Mesonet’s Temperature/RH/Dewpoint Graph is used in multiple areas in the agriculture industry. For example, it is used during hay baling season. These variables impact the hay’s moisture content which is important to succesfully bale, and it impacts the hay’s value as well. To view this graph, visit www.mesonet.org, and click on ‘Agriculture’ in the top menu. Then select one of the following from the sub-menu: Crop - Grass Hay or Alfalfa Livestock - Poultry Range/Forest - Rangeland or Forestry |
Date created | 2013-06-13 |
Date modified | 2013-06-13 |