Authors

Abstract

During the warm season, when ambient temperatures exceed +28 °C, the tunnel ventilation system is predominantly used in poultry facilities. This system effectively removes excess heat from the environment. However, under conditions of high ambient temperatures and high humidity, specialized systems are required to cool the incoming air and create a controlled microclimate within the poultry house. In ventilation systems, various types of cooling methods are employed to reduce the temperature of incoming air during the summer. Most commonly, these involve water spray systems. The core objective of this study is to conduct theoretical research on regulating heat and mass transfer processes in poultry houses, considering both internal dynamics and interactions through external barriers. This study proposes an innovative approach to cooling incoming air in poultry house ventilation systems. The method utilizes water sourced from underground wells and heat exchangers-recovery units (recuperators) to efficiently cool the incoming air. As a result of the numerical modeling, the temperature distribution within the service zone of the poultry house was determined. When heat exchangers are used, the inlet air temperature in the facility is maintained at +20 °C. The temperature increase along the length of the facility is clearly observed in the provided diagrams. The outlet temperature of the cooled air is +27.89 °C, which is attributed to heat generated by the poultry and the warming of the poultry house walls by external air. Thus, the air temperature within this cooling system does not exceed permissible limits. Analyzing the numerical modeling results at a height of 0.7 m from the floor level, it was concluded that no more than 2% of the poultry would experience discomfort under the proposed cooling system. The average air velocity is 0.83 m∙s⁻¹, and the air temperature is +23.64 °C.

Abstract in English

During the warm season, when ambient temperatures exceed +28 °C, the tunnel ventilation system is predominantly used in poultry facilities. This system effectively removes excess heat from the environment. However, under conditions of high ambient temperatures and high humidity, specialized systems are required to cool the incoming air and create a controlled microclimate within the poultry house. In ventilation systems, various types of cooling methods are employed to reduce the temperature of incoming air during the summer. Most commonly, these involve water spray systems. The core objective of this study is to conduct theoretical research on regulating heat and mass transfer processes in poultry houses, considering both internal dynamics and interactions through external barriers. This study proposes an innovative approach to cooling incoming air in poultry house ventilation systems. The method utilizes water sourced from underground wells and heat exchangers-recovery units (recuperators) to efficiently cool the incoming air. As a result of the numerical modeling, the temperature distribution within the service zone of the poultry house was determined. When heat exchangers are used, the inlet air temperature in the facility is maintained at +20 °C. The temperature increase along the length of the facility is clearly observed in the provided diagrams. The outlet temperature of the cooled air is +27.89 °C, which is attributed to heat generated by the poultry and the warming of the poultry house walls by external air. Thus, the air temperature within this cooling system does not exceed permissible limits. Analyzing the numerical modeling results at a height of 0.7 m from the floor level, it was concluded that no more than 2% of the poultry would experience discomfort under the proposed cooling system. The average air velocity is 0.83 m∙s⁻¹, and the air temperature is +23.64 °C.