Transcription of Chapter7 Ventilation principles
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Chapter7 Ventilation principles
Chapter 7 Ventilation principles Contents: Economic importance of Ventilation Air quality Air temperature Moisture Relationship between temperature and moisture Air exchange for temperature control Air exchange for moisture control Air velocity Ventilation system design Mechanical Ventilation systems Natural Ventilation systems Combined mechanical and natural Ventilation systems Emergency Ventilation Fan selection Fan accessories Maintenance A. Economic importance of Ventilation Changes in the modern broiler chicken have increased the importance of in-house environmental conditions. In response to market requirements, geneticists have raised growth rate as well as the yield of the carcass components. The extra meat yield in these broilers, most of which is concentrated in the breast, makes the broiler more sensitive to high temperatures, ammonia, and dust.
uric acid to ammonia and carbon dioxide is a function of the litter moisture content, temperature, and pH, all of which influence the number and type of microorganisms (bacteria and fungi) present in the litter. Poultry are adversely affected by high ammonia concentrations in a number of ways.
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