IJE_Vol 05 N 01

Permanent URI for this collectionhttps://archives.univ-eloued.dz/handle/123456789/22770

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Browsing IJE_Vol 05 N 01 by Author "Khechekhouche, Abderrahmane"

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    Numerical study of a new earth-air heat exchanger configuration designed for Sahara climates
    (جامعة الوادي - university of el oued, 2020-06-19) Hadjadj, Abdessamia; Attia, Abbes; Khechekhouche, Abderrahmane; Naili, Nabiha; Bendjenid, Bachir
    Thermal performance for cooling and heating in the building can be achieved by the novel shape of the earth–air heat exchanger (EAHE). In a heavily populated area such as City, Due to the limited ground space. EAHE systems are rarely used, for most residential andcommercial utilization.This paper presents a numerical investigation of the thermal performance of a spiral-shaped configuration Spiral Earth to Air Heat Exchanger SEAHE intended for the summer cooling inhot and arid regions of Algeria. A parametric analysis of the SEAHE has been performed toinvestigate the effect of diameter, depth, pipe length and of airflow rate on the outlet air in theexchanger. Results show that the specific heat exchange is used to cool in an arid zone (south-east of Algeria). When the ambient temperature varies between 40°C and 45 °C, the coolingtemperature varies between 25°C and 29 °C. Temperature difference inlet and outlet airexchanger 18°C, these values are quite acceptable with for cooling the building.
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    Study of a solar air conditioning system with ejector
    (جامعة الوادي - university of el oued, 2020-04-10) Ghodbane, ,MokhtarMokhtar; Boumeddane, Boussad; Khechekhouche, Abderrahmane; Benmenine, Djamel
    Air conditioning is one of the indispensable conditions of well-being in human life, so the face of this research to provide this basic necessity in remote areas and in desert places far from power grids. To achieve this goal, solar air conditioning has been adopted, where the compressor was replaced by an ejector, a parabolic trough solar collector coupled with a thermal generator and a small pump; this means that the solar air conditioner does not need a huge amount of electrical energy to operate. This paper is studding the optical and thermal efficiency of the solar collector used as a solar thermal generator, refrigeration subsystem performance (COPejc) and system thermal ratio of the studied air conditioner, where the cooling load is estimated at 18 kW. This work has allowed to acquire very important knowledge about R718 ejector solar air conditioners. Bouzaréah was chosen as the region to conduct this numerical study on June 11th, 2018. Regarding performance of the studied air conditioning subsystem (COPejc) is 0.6235. As for the PTC solar reflector subsystem, its mean optical performance is 75.74 % and its mean thermal performance is 65.01 %. Regarding the overall performance of the studied air conditioner, its mean value is 0.407