9.Central University_Seminars

Permanent URI for this communityhttps://dspace.univ-eloued.dz/handle/123456789/32720

Browse

Browsing 9.Central University_Seminars by Author "Abderrahmane Khechekhouche"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Evaluate the effect of changing climatic conditions on the optical and thermal performance of a linear solar collector
    (university Of Eloued جامعة الوادي, 2020-02-23) Mokhtar Ghodbane; Boussad Boumeddane; Abderrahmane Khechekhouche
    One of the main axes adopted by the Algerian state is the work to develop renewable energy technologies, especially solar energy, in regions with a large abundance of solar radiation. Through this study, the optical and thermal behavior of a linear Fresnel solar reflector was studied. This technology has been used as a device to produce superheated steam. The energy balance equations were analyzed and then programmed on the Matlab to obtain the results. The finite differences method has been used to simplify and approximate equations. El-Oued's desert climate region was chosen for the study. Four different days of the year have been chosen for this study. The optical efficacy identified by this study has reached 53.60%, where the thermal efficiency is equal to 37.3%. The average values of overall coefficient of heat loss “UL, (W/m².K)” was limited between 5.71837 (W/m².K) and 5.98112 (W/m².K). With regard to superheated steam, the temperature in December reached 500.9913 (K), where this is the lowest value recorded during the study. The results obtained are very encouraging to invest in electric plants that produce superheated steam by this linear collector
  • No Thumbnail Available
    Item
    Influence of parameters on performance of earth air heat exchanger in arid and hot climate
    (university Of Eloued جامعة الوادي, 2020-02-23) Abdessamia Hadjadj; Abdelmalek Atia; Boubaker Benhaoua; Abderrahmane Khechekhouche
    This paper presents a study influence parameter on the performance of an earth air heat exchanger (EAHE) in arid and hot climate. The effect of velocity, length and drop in temperature of the air is studied at the inlet and outlet of the pipe. The results show that maximum temperature drop available at low velocities because air gets larger time to get heat transfer in the underground pipe in soil and also the greater length of the pipe of earth air heat exchanger has more effect on performance of earth air heat exchanger. The temperature drops of air increases with decrease in air velocity, as in this study the temperature drop is 7.9 °C corresponding to 10 m/s velocities and 4.9 °C corresponding to 20 m/s velocities.