Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
FLUIDIZATION CURVES AND ANALYSIS OF POWER SPECTRAL DENSITY OF POLYPROPYLENE PARTICLES
Submission Author:
Eduardo Nóbrega , RS , Brazil
Co-Authors:
Eduardo Nóbrega, Marcelo Gotardo, Álisson Renan Stochero da Silva, Lucilla Coelho de Almeida, Joao Americo Aguirre Oliveira Jr, Flavia Zinani
Presenter: Marcelo Gotardo
doi://10.26678/ABCM.COBEM2023.COB2023-2252
Abstract
The particulate fluidization process is often present in the heat transfer industry, and it's constantly associated with the different energy transformation methods. In academia, it's possible to find several works referring to the characterization of particles. As a result, we decided to study the fluidization of Geldart D polypropilene particles in an experimental cylindrical bench to find out the fluidization curves under different conditions as well as the predominant frequencies of a piston flow regime. In all the experiments, the normal volume flow and the pressure data of were collected. The fluidization curves were obtained in two different methods: with and without time limits, while the frequency study was made through the application of the Fourier transform to separate the frequency components and specify the frequency with the most power in a Power Spectral Density (PSD) graph with a data collection of 70 seconds. The data was collected at different frequencies, depending on the required results: 1 Hz to the development of the system pressure drop curve, 1 Hz to a fluidization curve without time control, 10 Hz to a fluidization curve with time control and 250 Hz to study the time and frequency domain for the PSD curve. From this research, the obtained results were in according to what was show in the literature. It was found out that the particulates of polypropylene have a small dominant frequency of 2.57 Hz. In relation to the fluidization curves, it was discovered that both processes have very different results, specially in relation to the maximum pressure obtained.
Keywords
Fluidization bed, Polypropylene, Fluidization curves, PSD Analysis
