Chickens and turkeys are sensitive to high temperatures. High temperatures lower the chicken’s metabolism, which reduces egg production. Extremely hot days can even raise the mortality rate.
A cooling system is critical in order to achieve high production rates and increase efficiency.
Poultry houses with layers (egg-laying hens), broilers (chickens farmed for meat) and free range chickens all require some kind of cooling system.
The cooling concept is based on evaporative cooling. There are three main systems:
1. Fogger system with exhaust fan extraction
Evaporation of small water droplets that float along the poultry house. As the fine droplets evaporate, they cool the entire room with minimal wetting of the ground
Cooling of the chickens’ bodies with larger droplets that fall directly onto the chickens
(mainly for layers and turkeys). This system can be combined with air extraction. It can
be operated independently for poultry houses that don’t have any other cooling system, or as support for the wet pad system on extreme hot days (providing additiona moisture).
3. Wet Pad system
Moisture enrichment and cooling of the poultry house by means of suction of dry air from the outside through a wet pad.
There are two types of wet pads:
1) Water circulation and air ventilation through a pad madeof special grade paper in a honeycomb configuration.
2) Multiple black net layers ,instead of the above “wet pad”.It’s similarly based on a fan system and are moistened by180˚ sprayers (Modular or 7110), without the need for a circulation system.
System Structure, Design and Operation
1.Tunnel House—Wet Pad and Internal Micro- Sprinkler System
2. Simple Wet pad –Net & Sprayers
The design for a 150 m house would be a net wall section length of about 15 m
Sprayers: Modular 180˚ 70 l/hr mounted along the net every 2.0 m
Operation in pulses according to climate controller sensor for 30-60 secs.
Traditional Small Farming Open Poultry Houses
This type of farming is mainly for layers and turkeys.
Turkeys are sensitive to smaller droplets under 50microns.
Micro-sprinklers (modular model with LPD) are very effective in natural ventilated conditions of open poultry houses.
Low flow nozzles and low precipitation, combined with a timer controller, minimize excess of water on the floor:
• Fogger controller with temperature sensor
• Modular inverted sprinkler 40-105 l/hr, at 2.0-2.5 bar
• Filtration recommendation: 200 microns
* Water quality and possible stains on eggs are factors to be considered when selecting the suitable system for layers.
Guideline for operation Time vs. Temperature
On very hot, dry days shorten the intervals, according to chickens’ behavior.
(As a rule of thumb, the surrounding temperature is restored after 3-5 min.)
For young chickens without feathers, apply shorter pulse
Fogger System Design
Super Fogger 4 outlets with 3 x 3 or 3 x 4 m spacing
Required pressure: 4.0 bar
Flow rate: 24 l/hr
Precipitation rate: 2.7, 2.0 mm/hr, according to spacing
Height of installation: maximal height
Operating time: a few seconds to 1.0 min, depending on ventilation operation time
Basic operation is a sequence of 5 seconds on, 1.0 min. off.
Adjust the time, according to temperature and humidity.
Filtration: 120mesh \ 130 micron