Estimating energy efficiency of the aeration process of stored grains through machine learning¹

Estimativa da eficiência energética do processo aeração de grãos armazenados através de machine learning

ABSTRACT

Aeration is carried out by blowing external air into the silo, with the aim to keep the temperature in the mass of stored grains at safe levels. In the present study, the energy efficiency of aeration of stored sunflower grains was estimated, and a model was proposed and tested to estimate the energy efficiency of aeration, using different algorithms in supervised and unsupervised machine learning. The objective of the work was to develop a Web application based on data mining and modeling with machine learning. The database was composed of information on the average temperature at the height of the sensors, average temperature of the silo, external ambient temperature, occurrence of aeration, if there was cooling, heating and direct heating during aeration, and the energy efficiency of the aeration process. The model for estimating the energy efficiency of the aeration process proved to be efficient, identifying that the energy efficiency was 97.78% during the aeration of stored sunflower grains. Among the classifier algorithms tested, Support Vector Machine (SVM-Poly) showed the best metrics and indicators, hence being recommended for implementation in system development networks capable of predicting the aeration status of stored grains.

Key words:
Weka; support vector machine; K-means

HIGHLIGHTS:

The model for estimating the energy efficiency of the aeration process proved to be efficient.

The proposed model for evaluating aeration efficiency has applicability of use in predictive analysis of the process.

From data mining and modeling with machine learning, it was possible to develop a Web tool.