Chicken farm exhaust fanis one of the most necessary component in the mechanical ventilation system. In the facilities of housing poultry and also livestock they work as a driving force that has to provide needed air exchanging system. In the design of a mechanical ventilation system fan selection is the first step which is most important and it is very much needed to choose fans which are performance-tested and also efficient in energy.

Key Factors of Poultry Farm Ventilation

家禽房中最重要的是通风系统，该通风系统为家禽农场提供新鲜空气，这对于维持生命也非常重要。

High level of temperature, humidity and air contamination can be reduced to tolerable limits for confined the chickens with the help of it. High density of populations of the livestock and poultry farm in confinement is made possible and improved ventilation system. It can be reduced the total building cost per unit of housed. The economically important part of ventilation system can reduce the production and also the labor costs. As long as ventilation which concerned the exhaust fan is must-include part of an exhaust system of the poultry farm.

Principals of Ventilation of Poultry with Exhaust Fans

In the enclosed of building where the poultry farm is confined air replacement system is needed. Otherwise it may change air composition. These results can increase the concentration of carbon dioxide, ammonia and many other harmful gases to the unacceptable levels. In the following, Table 1 indicates that the critical and also the desired level of some of the gases which research has shown. Harmful gases and undesirable odors causes the respiration problem and also waste the decomposition is carried the system and brings the oxygen needed to sustain life by changing the air in the building. The system keeps airborne disease and organism at a tolerable level to the bird’s health by diluting them.

Common gas levels in poultry houses
Gas Symbol Lethal Desirable
Carbon Dioxide CO2 Above 30% Below 1%
甲烷 CH4 Above 5% Below 1%
Ammonia NH3 Above 500 ppm Below 40 ppm
Hydrogen Sulfide H2S Above 500 ppm Below 40 ppm
Oxygen O2 Below 6% Above 16%

There are two kinds of ventilation systems: These are: (1) natural air flow system and (2) mechanical air movement (fans). Because of varying the ventilation required to provide comfort to the chickens during the varying climatic conditions at a minimum cost. These two completely different systems are sometimes combined.

不同类型的家禽农场排气扇

How to Measure the Fan Capacity and Size for Your Poultry?

The amount of air of a fan moves depending on the shape of the blades, diameter of the blades, horsepower (hp) of the motor, speed at which the blades turn (rpm), design of the shroud and also other attachments such as louvers. The air moving capacity of a fan is depends on these combined factors. Cubic feet, or volume, of air moved per minute (cfm) fan capacity is measured .We get one of the most efficient and affordable exhaust fan for any size or ant type of chicken poultry, from HIGHTOP Chicken Cage To get a farm idea and to know what it needs to ensure the perfect ventilation system that you can have a look on it.

Considering The Energy Efficiency Along Exhaust Fans

When selected fans are for the animal ventilation system, energy efficiency will become an important issue which can expresse as airflow per unit of input energy, or cfm/watt. Various fans are manufacturer to tests the energy efficiency of fans. At the University of Illinois The Agricultural Engineering Department, Bio-environmental and Structural Systems Laboratory (BESS) tests the efficiency rate. This tests are done on 36-inch diameter blade fans by this lab which showed a wide range of variation in both energy efficiency (8.3 to 18.6 cfm/watt) at 1/10″ static pressure and fan performance (6,400 to 13,000 cfm). The dimension is supposed to adjust the any type of chicken farm is the proposed as the dimension of HIGHTOP poultry farm exhaust fan.

Points for Attention During Installation of Exhaust Fan System

  1. Extreme climate conditions of an area should keep in mind to design this system.
  2. When it is installed the ventilation equipment you have to follow the design and the specifications
  3. The building should be filled with birds to designed the capacity for the system balance.
  4. Insulation of the structure must be based on the intended use and local weather conditions.
  5. To be protected from rapid deterioration insulation should be of the proper type and installed.
  6. You should adjust the ventilation system seasonally and clean it regularly.
  7. For extreme climatic conditions supplemental heat and cooling should be provided.
  8. 所有设备（风扇和控件）都需要定期服务和良好的维护。
  9. Good management for the poultry, the building and the ventilation system should be provided.
  10. In case of power failure a stand-by electric generating equipment and/or a suitable alarm system should be available.

features of exhaust fan

Exhaust Fan System Maintenance

在动物外壳中运行的风扇被用来暴露于大量的灰尘，水分，并在叶片，百叶窗和裹尸布上积聚灰尘。污垢不会太大影响风扇叶片，但是百叶窗的气流可以减少近40％的污垢。为了防止风扇大量的气流减少。粉丝百叶窗和警卫可以定期进行润滑和清洁。必须使用石墨进行润滑以防止污垢积累。为了避免限制气流百叶窗的潜力，应在连续奔跑的情况下删除，但要防止个人或动物伤害保卫。

Not only the environment in a livestock or poultry barn become dirty but also there are corrosive gases, especially in facilities with the manure pits inside the facility. Fans that are exhaust from pit areas of Continuously running fans need a non-corrosive housing, such as fiberglass, to prevent the deterioration. The control which is done by a simple switch or a microprocessor, should also be protected to the eliminate which have electrical contact and also works as the switch from being exposed to corrosive gases, from the environment, A watertight and dust-tight electrical box. If you need more knowledge about the electrical wiring in corrosive environments, you can check the these “Farm Buildings Wiring Handbook”. This is available from the University of Minnesota Agricultural Engineering Extension office.

概括

An essential element for getting the proper performance of any mechanical ventilation system contains enough good quality poultry farm exhaust fans. On the basis of air delivery system in cfm against a 1/8-inch or 1/10-inch static pressure, fans should be selected. These rated energy efficiency also considered. Within a few years, the energy efficient fans will pay for themselves from the electrical energy savings project. To assure the valid ratings look for a reliable testing label when purchasing fans. For required ventilation rate in animal confinement facilities make sure that shutters, louvers and other restrictions are also included when selecting fans.