Simulation modeling of the microclimate system in poultry houses in the summer

Authors

  • V. Trokhaniak National University of Life and Environmental Sciences of Ukraine image/svg+xml
  • T. Lendiel National University of Life and Environmental Sciences of Ukraine image/svg+xml
  • V. Savchenko National University of Life and Environmental Sciences of Ukraine image/svg+xml
  • V. Liktey National University of Life and Environmental Sciences of Ukraine image/svg+xml

DOI:

https://doi.org/10.31548/energiya2022.04.121

Abstract

Modern microclimate systems for keeping poultry require new approaches. Air cooling and heating systems in the poultry house environment require significant water and energy resources. Therefore, the authors proposed an energy-efficient microclimate system in poultry houses using low-potential water energy from the use of shell and tube heat exchangers and soil heat exchangers. Among the included control parameters, the most important are the temperature in the room, the amount of harmful substances and air humidity. The amount of pollutants in the air is determined by the amount of air entering the room and the number of animals in it. When creating a mathematical model of the ventilation system in the poultry house, a material balance of harmful substances is created. One of the important factors is air consumption. Approximate functions of the required air exchange, as well as the required amount of water depending on the temperature of the outside air, were found. Depending on the required water consumption, the heat exchangers will be connected to work in autonomous mode using magnetic valves. One by one. At an outside air temperature of +23 ºС, it is necessary to use three heat exchangers with a water consumption of 2.5 m3/h. And in the temperature range from +35 ºС to +40 ºС, six heat exchangers with a water consumption of 57 to 108 m3/h are needed. A simulation model of heat and mass exchange in poultry houses in the summer period of the year was developed using heat exchange equipment in the MATLAB Simulink software complex. The indoor humidity change time constant will be equal to the time required to establish the indoor humidity set point once the humidity change rate is equal to the initial one. Model studies showed that the constant duration heating is 118.4 s. The productivity of the ventilation system is expressed as an approximate function and ranges from 36,000 to 170,000 m3/h. In fact, the simulation model system stabilizes in the summer period of the year in terms of temperature and humidity for up to 1000 seconds. Relative humidity is 60 %.

Key words: simulation model, bird house, heat exchanger, humidity regime, microclimate

References

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Published

2022-12-03

Issue

No. 4 (2022)

Section

Статті

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