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Modeling and Numerical Simulation of Heat Transfers in a Metallic Pressure Cooker Isolated with Kapok Wool

Modeling and Numerical Simulation of Material Science 2020年第2期10卷 15-30页

作者： Drissa Ouedraogo Serge Wendsida Igo Gael Lassina Sawadogo Abdoulaye Compaore Belkacem Zeghmati Xavier Chesneau Laboratoire d’Energies Thermiques Renouvelables(LETRE) Universite Joseph KI-ZERBOOuagadougouBurkina Faso Departement Energie Institut de Recherche en Sciences Appliquees et Technologies(IRSAT/CNRST)OuagadougouBurkina Faso Laboratoire de Mathematiques et Physique(LAMPS) Universite de Perpignan Via DomitiaPerpignanFrance

In this work, a numerical study of heat transfers in a metallic pressure cooker isolated with kapok wool was carried out. This equipment works like a thermos, allowing finishing cooking meals only thanks to the heat stored at the beginning of cooking, which generates energy savings. Cooked meals are also kept hot for long hours. In our previous work, we have highlighted the performances of the pressure cooker when making common dishes in Burkina Faso. Also, the parameters (thickness and density) of the insulating matrix allowing having such performances as well as the influence of the climatic conditions on the pressure cooker operation were analyzed in detail in this present work. The numerical methodology is based on the nodal method and the transfer equations obtained by making an energy balance on each node have been discretized using an implicit scheme with finite differences and resolved by the Gauss algorithm. Numerical results validated experimentally show that the thickness of the kapok wool as well as its density play an important role in the pressure cooker operation. In addition, equipment performances are very little influenced by the weather conditions of the city of Ouagadougou (Burkina Faso).

关键词： Pressure Cooker Kapok Wool Heat Transfers Modeling nodal method

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Experimental and Numerical Study of Energy Losses in a Barbecue Oven in Burkina Faso

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Open Journal of Energy Efficiency 2020年第1期9卷 31-52页

作者： Gael Lassina Sawadogo Laboratoire d’Energies Thermiques Renouvelables(LETRE) Universite Pr Joseph KI-ZERBOOuagadougouBurkina Faso Departement Energie Institut de Recherche en Sciences Appliquees et Technologies(IRSAT)OuagadougouBurkina Faso Laboratoire de Mathematiques et Physique(LAMPS) Universite de Perpignan Via Domitia(France)PerpignanFrance

This work concerns an experimental and numerical study of energy losses in a typical oven usually used in the agro-food craft sector in Burkina Faso. The experimental results were obtained by infrared thermography of the oven and by monitoring the evolution of the wall temperatures using thermocouples connected to a data acquisition system. These results indicate that the energy losses are mainly through the walls of the oven. The numerical study based on the energy balance and corroborated by the experimental study made it possible to quantify these losses of energy which represents almost half of the fuel used. These results will allow us to work on a new, more efficient oven model for the grilling sector in Burkina Faso.

关键词： Grill Oven Optimization Energy Losses nodal method

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FEASIBILITY OF EMBEDDING nodal HOMOGENIZATION IN NEXT GENERATION methodS FOR 3D PIN-BY-PIN CORE SIMULATION

FEASIBILITY OF EMBEDDING NODAL HOMOGENIZATION IN NEXT GENERA...

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第三届反应堆物理与核材料学术研讨会

作者： Shaohong Zhang Chuntao Tang~a Hao Huang~a Y.A.Chao~(a,b) ~a Shanghai Jiao Tong University,Shanghai,China ~b Westinghouse Electric Company,Pittsburgh,USA

*** Extended Summary The current generation methods for LWR core design and analysis share the following common features: A two step approach of using separately a lattice transport code and a core diffusion code, Pre-generated assembly-homogenized few(typically two)group cross-section table for nodal diffusion calculation, Pin power reconstruction after the global nodal diffusion calculation. This approach is being challenged by the increasingly complicated designs of fuel bundle(assembly)

关键词： Homogenization NGM nodal method

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