Abstract
The microclimate of a pigsty is determined by the combination of temperature, relative humidity, chemical and mechanical composition of the air, which have a significant impact on animal productivity and must be maintained within strict limits due to the physiological needs and capabilities of animals. An appropriate ventilation system has been created to ensure the removal of air from the pigsty. The purpose of the study is to establish the dependence of the operating parameters of the automatic ventilation system on the air quality in the pigsty, taking into account the permissible concentrations of gases. The developed automatic ventilation system for polluted air intake is located in the middle of the livestock house under the ceiling and consists of a central air duct, to which air intake pipes are connected. Air intake pipes are placed in the middle above each pen where animals are kept. Intake dampers with servomechanisms, temperature, humidity, and air quality sensors are installed at the inlet of the air intake pipes. The outlet of the central air intake duct is connected to the exhaust fan. Intake dampers with servomechanisms and sensors of temperature, humidity, and air quality are connected to the control unit by electrical wires. As a result of analytical studies of the automatic ventilation system for polluted air intake from a pigsty, the conditions for its effective operation have been mathematically substantiated. The developed technique and the algorithm implemented based on the Mathematica software package allows calculating the area of holes that form intake dampers with servomechanisms in the air intake pipes. The distribution of velocities in the air intake pipes and the distribution diagram of the area of holes that form intake dampers with servomechanisms in the air intake pipes are determined taking into account the design and technological parameters of the ventilation system and the distribution of the gas concentration (carbon dioxide, ammonia, and hydrogen sulphide) over the pens
Highlights
The microclimate in a pigsty is determined by the combination of temperature, relative humidity, chemical and mechanical composition of the air
The microclimate of a pigsty is determined by the combination of temperature, relative humidity, chemical and mechanical composition of the air, which have a significant impact on animal productivity and must be maintained within strict limits due to the physiological needs and capabilities of animals
The purpose of the study is to establish the dependence of the operating parameters of the automatic ventilation system on the air quality in the pigsty, taking into account the permissible concentrations of gases
Summary
The microclimate in a pigsty is determined by the combination of temperature, relative humidity, chemical and mechanical composition of the air. Each of these indicators individually has a significant impact on the animal productivity and must be maintained within strict limits due to the physiological needs and capabilities of animals. The microclimate is affected by the technology of keeping animals, the density of their placement, the quantity and quality of bedding, the type of feeding, the species and age composition of livestock. A microclimate is a meteorological regime of closed rooms for animals, the concept of which includes temperature, humidity, chemical composition and speed of air movement, dustiness, and illumination. The state of the microclimate depends on climatic and weather conditions, the type of pen and its enclosing structures, the level of air exchange, the perfection of the systems of ventilation, heating, sewerage, and manure harvesting [1]
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