Avaliação do controle automático do sistema de aeração em silo protótipo

Abstract

Excessive use of grain aeration when stored, in addition to allowing collection according to weather conditions, can increase due to excessive consumption of electrical energy. Many technological tools have emerged and with great possibilities of use in various systems, with the effective performance of operations and tasks in a more and optimized way. With this work, we sought to adapt in a silo-automatic control of aeration with the aid of data recording by means of temperature and relative humidity sensors, controllers by board computers. The construction was built with a 200 L generation metal drum, containing a cone with vents at the top, a discharge valve at the bottom and aeration ducts in a “V” configuration, at the inner bottom of the silo. For the insufflation of aeration air, a sirocco fan with forward-facing blades and a 12 V motor was used. The set has a power of 0.08 hp. The intergranular conditions are monitored through sensors allocated in decision computers and controlled with the aid of data for later acquisition. Raspberry was responsible for activating or not the generation system through the analysis of external climatic conditions, with the aid of a Campbell station, introduced as semigranular. Parameters were established according to the grain service concepts so that the system could make a decision to aerate or not. The aeration operation was also not used in the Database to control the operation's usage time. The validation of the system at field level, the results indicate that the experiment carried out efficient control, keeping the grains stored after good conditions, allows to verify a significant reduction in energy consumption and, consequently, cost reduction.