Taking into account the squat silos with high grain line and large-volume storage characteristics, to ensure that the stored grain secu rity, we compared phosphine RECIRCULATION FUMIGATION OF PHOSPHINE with the conven...Taking into account the squat silos with high grain line and large-volume storage characteristics, to ensure that the stored grain secu rity, we compared phosphine RECIRCULATION FUMIGATION OF PHOSPHINE with the conventional circulation fumigation method and compared with test data which measured by the analysis and research. Squat Silos taken positions on the circulation phosphine fumigation insecticidal methods, not only to achieve the purpose of the pesticide control, and effectively reduce the cost of fumigation, a decrease of gas in the fight against the occu pational hazards, and have achieved good results.展开更多
Traditional method to prevent stored grain from deterioration is to control grain temperature.A three dimensional(3-D)numerical model was established to study the temperature variation in outdoor squat silo and large ...Traditional method to prevent stored grain from deterioration is to control grain temperature.A three dimensional(3-D)numerical model was established to study the temperature variation in outdoor squat silo and large size horizontal warehouse at quasi-steady-state.In this research,porous media model and solar radiation model were adopted.Numerical and experimental results showed that grain temperature was influenced by temperature of wall,height of grain and the distance between grain and the wall.Temperature changes dramatically at the top layer of grain heap due to solar radiation and heat convection at air layer.Temperature of grain close to wall increased with the increasing of ambient temperature.The model established in this research is suitable for predicting grain temperature in outdoor squat silo and large size horizontal warehouse.展开更多
文摘Taking into account the squat silos with high grain line and large-volume storage characteristics, to ensure that the stored grain secu rity, we compared phosphine RECIRCULATION FUMIGATION OF PHOSPHINE with the conventional circulation fumigation method and compared with test data which measured by the analysis and research. Squat Silos taken positions on the circulation phosphine fumigation insecticidal methods, not only to achieve the purpose of the pesticide control, and effectively reduce the cost of fumigation, a decrease of gas in the fight against the occu pational hazards, and have achieved good results.
基金National Natural Science Foundation of China(31271972)University Science and Technology Innovation Team Support Plan of Henan Province,China in 2016(16IRTSTHN009).
文摘Traditional method to prevent stored grain from deterioration is to control grain temperature.A three dimensional(3-D)numerical model was established to study the temperature variation in outdoor squat silo and large size horizontal warehouse at quasi-steady-state.In this research,porous media model and solar radiation model were adopted.Numerical and experimental results showed that grain temperature was influenced by temperature of wall,height of grain and the distance between grain and the wall.Temperature changes dramatically at the top layer of grain heap due to solar radiation and heat convection at air layer.Temperature of grain close to wall increased with the increasing of ambient temperature.The model established in this research is suitable for predicting grain temperature in outdoor squat silo and large size horizontal warehouse.
