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Experimental study of an earth-to-air heat exchanger coupled to the solar chimney for heating and cooling applications in arid regions

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Abstract

Arid regions around the world are characterized by hard summer and winter seasons, which leads to thermal discomfort. The southwest of Algeria is classified as an arid region, where the temperature in the summer season passes sometimes 50 °C in the shade and reaches negative values in the winter season. In addition, the yearly relative humidity is below 50%. The hard thermal and hygrometric situation requires actions to fulfill the thermal comfort requirements. Air-conditioning systems are a solution, but at the same time, they are responsible for a big amount of energy consumption in the building sector. In the present paper, an experimental investigation is conducted on the performance of a coupled system: earth-to-air heat exchanger and a solar chimney. The main purpose is to reduce costs and maximize the direct effect between the two techniques. The obtained results showed that the new system was able to create two main thermal regimes in the same day. The first one is a ‘heating’ by increasing the outlet air temperature passing through the buried pipe and solar chimney to reach a maximum gain of 14 °C in day 3. The second thermal regime is the ‘cooling’ that is made by reducing the air temperature at the EAHE outlet by 11.6 °C on day 5. It is also observed that the system increases the outlet air relative humidity by 46% due to the condensation phenomena and reduces it sometimes by 45%. The recent model made of the two techniques was able to produce between 3 and 20 Watts of heating/cooling capacity at the outlet of the system.

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Authors and Affiliations

  1. Laboratory of Energy in Arid Areas (ENERGARID), University of Bechar, P.O. Box 417, 08000, Bechar, Algeria

    Nasreddine Sakhri & Mohammed Bensafi

  2. Unit of Research on Materials and Renewable Energies, Department of Physics, Faculty of Sciences, Abou Bekr Belkaid University, P.O. Box 119, 13000, Tlemcen, Algeria

    Younes Menni

  3. Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam

    Ali J. Chamkha

  4. Institute of Theoretical and Applied Research (ITAR), Duy Tan University, Hanoi, 100000, Vietnam

    Ali J. Chamkha

  5. Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze, 181/A, 43124, Parma, Italy

    Giulio Lorenzini

  6. Department of Technology, University Centre of Naama - Salhi Ahmed, P.O. Box 66, 45000, Naama, Algeria

    Houari Ameur & Noureddine Kaid

Authors
  1. Nasreddine Sakhri
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  2. Younes Menni
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  3. Ali J. Chamkha
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  4. Giulio Lorenzini
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  5. Houari Ameur
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  6. Noureddine Kaid
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  7. Mohammed Bensafi
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Correspondence to Ali J. Chamkha.

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Sakhri, N., Menni, Y., Chamkha, A.J. et al. Experimental study of an earth-to-air heat exchanger coupled to the solar chimney for heating and cooling applications in arid regions. J Therm Anal Calorim 145, 3349–3358 (2021). https://doi.org/10.1007/s10973-020-09867-6

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  • DOI: https://doi.org/10.1007/s10973-020-09867-6

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