CSP Sites Suitability Analysis in the Eastern Region of Morocco

AbstractMorocco in general and its eastern region in particular has become one of the target regions for investors in the field of solar energy, since it hosts the Ain Beni Mathar solar thermal power plant and it will host one of the five future CSP power plants fixed by MASEN (the Moroccan Agency for Solar Energy). Consequently, it is necessary to identify the most appropriate sites for the installation of the CSP power plants in this region with high precision to profit as much as possible from the solar resource. This paper presents some preliminary results aiming to highlight the suitable areas for the installation of CSP power plants in the eastern region of Morocco using ArcGIS software and a large land exclusion database with “high spatial resolution”. This database has been built based on data sets from governmental organizations and our knowledge about the details of the region. The solar map has been calculated using the hemispherical viewshed algorithm included in the ArcGIS environment. For each layer all spatial information on the defined exclusion criteria was overlaid and marks the non suitable places as white pixels. In a final step, all layers are overlaid and a final map was created showing the suitable and non suitable places. The results show that the eastern region of Morocco has a high suitability to host CSP power plants with more than 65% of its total surface fulfilling the criteria

Etude des besoins énergétiques du chauffage et du refroidissement d'un bâtiment administratif au Maroc.

Le gouvernement marocain vise à réaliser une économie d’énergie primaire d’environ 12%à l’horizon 2020 en mettant en place un plan d’efficacité énergétique dans les différents secteurs économiques. En effet, le secteur de bâtiment est un gros consommateur d’énergie, mais en même temps possède le plus fort potentiel d’amélioration de l’efficacité énergétique au Maroc. C’est dans cette perspective s’inscrit ce travail. En considérant un bâtiment administratif type, l’étude a été effectuée sous le logiciel TRNsys pour calculer le bilan énergétique (besoins annuelles de chauffage et de refroidissement) de cette construction qui ne contient pas des mesures d’efficacité énergétique dans les six zones climatiques du Maroc

A computation of flow and heat transfer past three heated cylinders in a vee shape by a double distribution MRT thermal lattice Boltzmann model

Laminar convective flow heat transfer from a three heated square blocks arranged as a vee shaped inside a two-dimensional plane channel is numerically investigated. We propose a numerical scheme to solve the flow and the temperature fields using the MRT-D2Q9 model and the MRT-D2Q5 model, respectively. The fluid considered here is air (Pr = 0.71) and the analysis is carried out for Reynolds numbers ranged between 10 and 100 and for gap-to-diameter ratio 1 and 2. The velocity plots and isotherm patterns obtained are systematically presented and discussed to interpret the flow and heat transfer visualization. The variations of drag coefficient and time-averaged local Nusselt number around the surface of the three cylinders as well as the surface-averaged values of the time-averaged Nusselt number for each block are also investigated and discussed. It is found that the numerical results agree well with other numerical results. This demonstrates that the presented numerical model is a promising tool to investigate the simultaneous solution of fluid flow and heat transfer in complex geometries

Etude numérique du couplage convection rayonnement dans une enceinte cloisonnée

International audienceIn this work, we numerically studied the influence of the partitions on the transfer of heatby natural convection and thermal radiation in a tilted cavity of an angle φ = 45° compared to thehorizontal plane. The equations controlling the system are solved by the method of finished volumes.The cavity contains a number of partitions varying from 0 to 3. We concluded that: i) thethermal radiation increases the transfer of heat within the cavity, ii) more number of partitions islarge, plus the transfer of heat is reduced.-Dans ce travail, nous avons étudié numériquement l'influence des partitions sur le transfert de chaleur par convection naturelle et par rayonnement thermique dans une cavité inclinée d'un angle par rapport au plan horizontal. Les équations gouvernant le système sont résolues par la méthode des volumes finis. La cavité contient un nombre de partitions variant de 0 à 3. Nous avons conclu que: i) le rayonnement thermique augmente le transfert de chaleur au sein de la cavité, ii) plus le nombre de partition est grand, plus le transfert de chaleur est réduit

MRT-Lattice Boltzmann simulation of forced convection in a plane channel with an inclined square cylinder

Numerical investigation of the two-dimensional flow and heat transfer, in a horizontal channel differentially heated and obstructed by an inclined square cylinder mounted to the approaching flow with an angle of inclination equal to 45° is carried out. The strategy is based on the combination of the Multiple Relaxation Time Lattice Boltzmann Equation (MRT-LBE) to obtain the velocities and on the Finite Differences Method (FDM) to solve the equation of energy. This numerical scheme is assessed against previous publications. Close attention is paid to Reynolds number ranging from 0 to 300 at Prandtl number, Pr = 0.71 with constant physical properties of the fluid. Results are presented in terms of streamline contours, isotherms, drag coefficient, Strouhal number, local and average Nusselt numbers for various Reynolds numbers. The computed results show that the presence of such bluff body affects significantly the fluid flow and causes enhancement in the heat transfer from the hot bottom wall to the flow

Convective heat transfer over two blocks arbitrary located in a 2D plane channel using a hybrid lattice Boltzmann-finite difference method

The present paper deals with the numerical investigation of a 2D laminar fluid flow and heat transfer in a plane channel with two square blocks located at arbitrary positions. The numerical model is based on a coupling between the multiple relaxation time-lattice Boltzmann equation and the finite difference method for incompressible flow. Both the horizontal and the vertical separation distances between the two blocks are varied. Particular attention was paid to the distribution patterns of the time averaged local Nusselt number on the top and bottom walls. Results obtained from the present study show a complex flow patterns developed in the channel due to the change of the square blocks positions