Journal : Biosystems Engineering, 230, 106-130
Author : Jun-gyu Kim, In-bok Lee*, Andre Aarnink, Bong-joo Lee, Deuk-young Jeong, Hyo-hyeog Jeong, Se-han Kim, Bong-kuk Lee, Dong-kyu Lee
Abstract
The pig industry needs strategies to solve problems such as poor rearing environment, diseases, odours, and high energy loads. In this study, an air recirculated ventilation system (ARVS) was developed with optimally designed modules and an operating algorithm. Validation experiments conducted in winter and reported here but experiments carried out during the summer and during changes in season and reported in Kim et al. (2023). Environmental data (air temperature, relative humidity, carbon dioxide, ammonia, and ventilation rate) were automatically collected during winter and livestock disease and stress of piglets were evaluated by sampling. In winter the ARVS reused internal heat energy to satisfy the pig thermal demand. Each module of ARVS modules was designed and integrated based on the previous researches. Environmental factors were monitored in real time, and then ARVS was automatically controlled using developed algorithm. The ventilation
rate of the ARVS was about 3 times more than that of the conventional ventilation system (CVS). Air temperature, relative humidity, and ammonia gas inside the ARVS piglet room were optimally maintained. Also, by reusing about 73% of internal energy, it was possible to reduce heating costs. The average concentrations of ammonia and odour measured at the outlet were 2.1 ppm and 251 OU. Piglets of the ARVS weighed 1.6 kg more than those of the CVS. The disease detection rate was <1% with beneficial bacteria increased and harmful bacteria decreased.
Keywords : Air recirculated ventilation system(ARVS); Energy saving; Livestock disease; Optimal environment; Pig productivity; Odour emission
Download Link : https://doi.org/10.1016/j.biosystemseng.2023.04.008