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Performance Analysis of Low-Capacity Water–LiBr Absorption–Cooling Systems Using Geothermal Heat-Sinks in Hot Climates

Author

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  • Omar Ketfi

    (Laboratoire d’Etudes et Recherche en Technologie Industrielle, LERTI, Université de Blida 1, Route Soumâa, Blida BP 270, Algeria
    Département de Mécanique, Faculté de Technologie, Université de Blida 1, Route Soumâa, Blida BP 270, Algeria)

  • Hamid Abdi

    (Département de Mécanique, Faculté de Technologie, Université de Blida 1, Route Soumâa, Blida BP 270, Algeria
    Laboratoire Eau, Environnement et Développement Durable (2E2D), Faculté de Technologie, Université de Blida 1, Route Soumâa, Blida BP 270, Algeria)

  • Billel Lounici

    (Département de Mécanique, Faculté de Technologie, Université de Blida 1, Route Soumâa, Blida BP 270, Algeria)

  • Mahmoud Bourouis

    (Department of Mechanical Engineering, Universitat Rovira i Virgili, Av. Països Catalans No. 26, 43007 Tarragona, Spain)

Abstract

This paper addresses the use of a geothermal heat-sink to remove the heat released in domestic-sized single and double-effect water–LiBr absorption chillers operating in hot climates. This study is the continuation of a previous work, which demonstrated the operational constraints of these absorption chillers working in hot Algerian climate-zones. After localizing the non-operation zones for both systems, the thermo-physical properties of the soil at several depths are investigated for the implementation of the underground heat-exchanger. This heat-exchanger is connected to the condenser and the absorber of both systems, to supply cooling water at inlet temperatures of 33 °C in hot climate conditions, with ambient temperatures varying from 38 °C to 42 °C. The results show a steady operation for both absorption chillers in climate conditions which had not previously allowed the two systems to operate in water or air-cooled modes. A maximum coefficient of performance of 0.76 and 1.25 is obtained for single- and double-effect absorption cycles, respectively, with chilled water at 7 °C. The underground-tube length required is between 4.5 and 18 m, depending on the absorption-cycle configuration and the temperature of the chilled water.

Suggested Citation

  • Omar Ketfi & Hamid Abdi & Billel Lounici & Mahmoud Bourouis, 2023. "Performance Analysis of Low-Capacity Water–LiBr Absorption–Cooling Systems Using Geothermal Heat-Sinks in Hot Climates," Energies, MDPI, vol. 16(2), pages 1-19, January.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:2:p:809-:d:1031227
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    References listed on IDEAS

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    1. Asgari, Armin & Tajaddod, Hadi & Zirak, Reza & Mahmoodi, Reza, 2024. "Proposal of a geothermal-driven multigeneration system for power, cooling, and fresh water: Thermoeconomic assessment and optimization," Energy, Elsevier, vol. 301(C).

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