Biofuels temperature measurement error in termoanemometrical flowmeters

Abstract

The paper considers the measurement of biofuel temperature error, which is based on using a thermoelectric converter in thermoanemometric flowmeter. Quantitatively, these measurement errors were expressed by a mathematical model. Therefore, for more efficient use of thermal converters, necessary calculations of TAF errors were carried out, and the analysis of the feasibility of this TAF was conducted. As a result of the studies, measurement accuracy and performance, which ensures a continuous real-time measurement process were determined. A new mathematical model of thermoanemometric flowmeter errors was developed, and analytical expressions for calculations of its basic errors were obtained. Therefore, to improve the flowmeter accuracy, more sophisticated algorithmic procedures (approximation of biofuel temperature measurement results based on the least squares method and applying artificial neural networks) were used.This ensures measurement accuracy of volumetric motor fuel flow rate of 1.0...1.5 % at the heater temperature measurement accuracy of 1 %. Using a set of thermal methods and creating new flowmeter structures allow to make biofuel flow rate measurements fully automated with high accuracy and performance.