Browsing by Author "Kaddour, Abdelmadjid"

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Bioclimatic approach of passive cooling techniques for the design of buildings in southern Algeria
(جامعة الوادي - university of el oued, 2021-06-03) Hebbal, Belkhir; Yacine, Marif; Kaddour, Abdelmadjid; Belhadj, Mustapha
The bioclimatic approach looks into the opportunities for building conception under the local climatic conditions. The first bioclimatic chart has been developed by Olgyay which combines temperature with relative humidity to characterize the comfort zone. It is founded on outside climate conditions to identify attenuation measures such as solar radiation, wind speed, or shading to reach comfortable inside conditions. Givoni created also a bioclimatic chart founded on inside conditions using the physical and thermal properties of air. Bioclimatic approach strategies contribute to decreasing the building energy loads and increasing thermal comfort for its residents over the year. The principal aim of this research is to evaluate a bioclimatic approach to passive cooling for building design in Algeria's South using Givoni's Bioclimatic chart and Olgyay's Bioclimatic chart. Climate data of various locations (Ouargla, Ghardaia, and El Oued) within this area were collected and analyzed. Furthermore, an overview of appropriated conception strategies for the hot season for each zone is developed. The results show that the maximum average temperature from June to August at around 43.1°C. After applying passive cooling strategies, the temperature indoor can be decreased from about 26.1 to 31.4°C, which can be described as being in the comfort zone for the three studied locations. Finally, these findings can contribute to understanding the thermal behavior of residential buildings and offer guidelines to develop a convenient concept of what the building composition should look like in arid and hot climates.
Dynamic modelling of an earth-to-air heat exchanger for air cooling on the building in hot temperate climate of Beni Mellal Morocco
(جامعة الوادي - university of el oued, 2021-06-15) Arroub, IsmailIsmail; Bahlaoui, Ahmed; Belhouideg, Soufiane; Kaddour, Abdelmadjid
In this article, we examined the passive cooling techniques built into a building in hot temperate climate. Our work aims to reduce the energy demand for cooling and progress the thermal comfort of building by decreasing overheating hours. The dynamic simulations of the energy performance in a building with an earth-air heat exchanger (EAHX) are performed in the summer period using TRNSYS software. The building is situated in Beni Mellal city (Morocco) where the climate is a hot temperate one. The results of the simulations show a significant potential for air cooling. Indeed, for the hottest day of July (retained for this study), when the outside temperature is 44.8 °C and the cooled temperature (inside) is 29 °C, the difference of 15.8 °C is obtained. Also, an evaluation of the relative humidity is provided. Finally, we recommend that the Moroccan thermal code encourage the use of passive cooling techniques; precisely in temperate climate.
Experimental study of the effect of meteorological parameters on the performance of the solar chimney power plant
(جامعة الوادي - university of el oued, 2021-06-16) Azizi, Abdelghani; Benmenine, Djamel; Nouar, Hadda; Kaddour, Abdelmadjid
The solar chimney power plant (SCPP) is an economical technology for the production of solar electricity. The increase in the production efficiency of this type of installation is depended of the several theoretical and experimental studies. This paper studied the effect of some key parameters such as (ambient temperature, solar radiation), on the performance of the solar chimney power plant. Using the dimensions of our SCPP prototype and also compared by the Manzanares prototype with Ouargla weather conditions. Where the maximum solar radiation and ambient temperatures are 957 W/m2 and 30 ° C at 15h00. Respectively. The measured average air speed is 1.04 m/s, and the electric power value of the prototype is 2.04W. The results show that the solar radiation and the ambient temperature have a direct effect in the SCPP efficiency, and also confirm that the technology of solar chimneys is the best solution to install in the hot and arid areas like Ouargla city.
Simulation of different modes of heat transfer on a parabolic trough solar collector
(جامعة الوادي - university of el oued, 2021-06-26) Benhabib, Loubna; Marif, Yacine; Belaid, Zakia Hadjou; Kaddour, Abdelmadjid; Benyoucef, Boumediène
The development of solar concentrator technology has just reached a very significant level. Using reflectors to concentrate the sun's rays on the absorber dramatically reduces the size of the absorber, reducing heat loss and increasing its efficiency at high temperatures. Another advantage of this system is that the reflectors are significantly less expensive, per unit area, than the flat collectors. To determine the performances of a cylindrical-parabolic concentrator, mathematical modeling of the heat balance on the absorber, the coolant, and the glass envelope was established using Matlab. The system of equations obtained is solved by the finite difference method. The results for a typical day are the variation in the temperature of the heat transfer fluid, the absorber tube, and the glass envelope. Thus, we examine the effect of the wind speed, flow rate on the temperature distribution of the coolant at the outlet. However, for a mass flow rate of the fluid of 0.1 kg / s, the outlet temperature of the fluid is 85 ° C with a thermal efficiency of 73%. Excluding the energy absorbed by the absorber tube is 75% of the solar intensity received on the reflector.