Abraham Tetang Fokone

National School of Agro-Industrial Sciences of the University of Ngaoundere

In this study, convective heat and mass transfer during papaya drying in a parallel airflow were simulated. The aim of this work was to consider the boundary conditions at the leading and trailing edges in the coupled and simultaneous resolution of the heat and mass transfer equations to better predict papaya drying kinetics. The Luikov equations e...

This work consisted of simulating convective heat and mass transfers during the drying of papaya in a parallel air stream. The aim of this work was to simultaneously couple the two-dimensional heat and mass transfer equations in the product in order to predict the drying kinetics of the papaya. These papaya slices were arranged on a rack with a len...

In this study, we have developed and modeled a saw tooth solar collector. It is a solar collector with single pass between the transparent cover and the absorber fixed on the insulator. The cover is double glasses with the plane upper glass and the lower glass in the shape from saw teeth. The absorber is also in the shape of saw tooth. After having...

This work focused on the experimental determination of drying parameters during airflow drying licking countercurrent of Mangifera Indica L. The samples were dried in a modular electric dryer operating in forced convection. The data collected made to draw the different drying kinetics of the mango at 40, 50 and 60°C. The solution of the Fick equati...

Transpired solar collectors have been widely studied during the last 30 years by experimental, mathematical, and numerical approaches. However, numerical approaches have been frequently simplified because of insufficient computing power. Transpired solar collectors are complex to analyze via numerical simulation mainly due to a difference in scale...

Climate change has become a fundamental concern for scientific researchers, architects and engineers, so it’s required to improve the performance of sectors responsible for city and building infrastructure. Burning fossil fuels to produce electricity and heat is the biggest cause of climate change and emissions, and represents one third of total gr...

This work presents the simulation of drying with shrinkage by the finished window method. To do this, we recalled the drying balance equations and expressed the shrinkage that a product undergoes during the process of product dehydration by means of the shrinkage rate. Then presented the method of resolution employed with an application to the dryi...

The present work was focused on the experimental investigation of a double air pass solar collector which was designed and constructed at the Laboratory of Energetic and Thermal Applied of the National School of Agro-Industrial Sciences of the University of Ngaoundere. It consists of a double glazed cover with a surface of 0.47 m², an absorbent pla...

Within the context of solving the problem of energy deficit and environmental pollution due to fossil fuels, the use of renewable energies (RE) is an appropriate solution. However, the instability of these sources remains one of the considerable limits to their exploitation. Our work concerns the evaluation of wind potential by integrating the para...

Finite Window Method is a new numerical mesh free technique for solving problems defined either in terms of Partial Differential Equation or by a set of conservation/equilibrium laws. The principle behind the FWM is that in such problem each element of the concerned domain is interacting with its neighbors and will always try to adapt to keep in eq...

The present work has focused on the determination of a new model of intermittent thin film drying of mango. During the experiments, the samples spread on three trays, were placed in a through-flow modular electric dryer. The masses of the fresh products studied were 500 and 800g having an initial moisture content of 80%. Drying was carried out usin...

This work was conducted to study the thin-film drying kinetics of mango (mangifera indica L.) using a modular electrical dryer licking countercurrent and forced convection. Drying experiments were carried out in the Laboratory of Energetics and Applied Thermal (LETA) of the National School of Agro-Industrial Sciences of the University of Ngaoundere...

Within the context of the installation of a tool of resolution of the equations of transfer of heat and mass, the finite windows method was proposed. This method was applied for the first time in the study of transfer of heat for a wall plane which is a simple case. This method gave satisfactory results as compared to the old methods which are the...

Le présent travail est une simulation numérique du rendement thermique d’un insolateur plan à air double vitrage double passe, dans un environnement tropical humide, cas de la Région de l’Adamaoua au Cameroun. L’objectif de ce travail est de modéliser l’influence de la variation de l’épaisseur des vaines d’air et de la vitesse de circulation du flu...

This work presents the survey of the behavior of the constituent of a solar insulator submitted to a natural sunshine in forced convection. A model based on equations of the thermal balances has been established while using the nodal method. Its validation is achieved from the comparison of the theoretical and experimental results. It describes the...

The drying kinetics of food is very important for the understanding of the drying process and for optimizing the drying conditions. This work is an experimental contribution to the study of drying kinetic of mango under intermittent drying mode. Drying was carried out in a convective dryer using three inlet air temperatures (40°C; 50°C and 60°C) wi...

Le présent travail est une étude numérique de l’influence de l’intermittence sur le séchage solaire convectif indirect des tranches de mangue. L’objectif est de caractériser les cinétiques de séchage de la mangue dans un séchoir solaire indirect composé d'un insolateur plan à air et d'une enceinte de séchage. Les équations qui régissent les transfe...

Ce travail présente une contribution expérimentale à l'étude du séchage convectif en régime intermittent. L'expérimentation a été conduite pour la mangue dans un séchoir électrique à convection forcée. Le régime intermittent de séchage est constitué de cycles d'une durée de 2 heures comportant une heure de séchage à la température de l'air asséchan...

This work concerned the study of the influence of the drying parameters on the water loss of the fresh carrot coming from the area of Adamawa. This study was undertaken in a drier designed and produced in a tropical environment. Drying was carried out at various temperatures 45; 50 and 55°C and at various speeds of the air circulation (0.5;1 and 1....