This paper presents some results that were obtained in fault diagnosis for a wood-drying process. It is diffcult to detect and diagnose faults or failure in the drying process due to complex dynamic nonlinearity, coupling effects among key variables, and process disturbances caused by the variation of lumber sizes, species and environmental factors. In this paper, a real-time fault diagnosis al...

This work proposes the development of software that has the objective of simulating the drying of cerrado fruits. The project was constructed through bibliographical surveys that pointed out several mathematical models that represent phenomena of heat and mass transfer between product and drying air. The developed program is dynamic and based on the Thompson model, but allows the use of the Pag...

The concept of immiscible displacement as an invasion percolation (IP) process driven by heat and mass transfer is used in a pore network model for convective drying of capillary porous media. The coupling between heat and mass transfer occurs at the liquid-gas interface through temperature dependent equilibrium vapour pressure, surface tension and phase change enthalpy (in evaporation and cond...

The modelling and simulation of drying porous coal particles in superheated steam was investigated in this paper. Improved transport and kinetic parameters as well as particle shrinkage were considered in arriving at the results. The resulting partial differential equation describing the drying process was solved numerically using the finite element analysis in addition to other useful equation...

The effect of the geometric representation of bananas on the numerical simulation of its isothermal drying kinetics is studied. To study that effect, it is supposed that the diffusion model describes satisfactorily the drying process with boundary condition of the first type and diffusivity varying as a function of the local moisture content. The geometries used to represent the banana are: inf...

Pelletizing plant of the Gol-E-Gohar mining and industrial company consists of a burner, a dry ball mill (6.2 m × 13 m), and an air separator. The ball mill consists of a 2 m-long drying and an 11 m-long grinding chambers. The iron ore concentrate is fed to the drying chamber by a feed chute. It was found that when the feed moisture content increased from 1.3% to 3.5%, the throughput decreased ...

The Pickett effect is the phenomenon of creep enhancement during transient drying. It has been observed for many nanoporous solids, including concrete, wood and Kevlar. While the existing micromechanical models can partially explain this effect, they have yet to consider nanoscale dynamic effects of water in nanopores, which are believed to be of paramount importance. Here, we examine how creep...

In-bin drying provides an alternative to traditional drying in terms of achieving good grain quality and saving fossil fuel. Some mathematical models were developed which could be used to simulate the in-bin drying process. To test the models’ ability for application, a partial differential equation model (PDE model) and a logarithmic model (Log model) were applied to simulate the heat and mass...