Evaluation of heat value of biodiesels produced from solar collector-biofuel hybrid system by dielectric spectroscopy techniques

The properties of the biodiesel will be changed by changing the reaction parameters of biodiesel production from vegetable oils that heating value is one of important of them. The aim of this study isto evaluatea new system in order to detect changes inthe properties of biodiesel, such as heating value by dielectric spectroscopy with the capacitive sensor. Transesterified palm-based biofuels weresynthesized in different weatherconditions using the heat loss of a linear parabolic trough solar collector power. At first, a sample of biodiesel was produced with optimized parameters as the basis of evaluation. Then, five samplesof biodiesel with the same optimized parameters but with different temperatures were producedby the solar collector as one of the renewable energy systems. After that, the samples were placed in the device and information obtained by dielectric spectroscopy was transferred to software. In order to validate the analysis, some algorithms fromthe decisiontree technique were used. According to the results, the Classificationand Regression Tree (CART) algorithm had the highest accuracy (99%) in comparison with others. According to the accuracy of algorithms, it was deducedthat the chosen techniques had good potential to determine biodiesel fuel properties