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Numerical investigation about the improvement of the thermal potential of an Earth-Air Heat Exchanger (EAHE) employing the Constructal Design method

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  • Kepes Rodrigues, Michel
  • da Silva Brum, Ruth
  • Vaz, Joaquim
  • Oliveira Rocha, Luiz Alberto
  • Domingues dos Santos, Elizaldo
  • Isoldi, Liércio André

Abstract

The Earth-Air Heat Exchanger (EAHE) is a device used to improve the thermal condition of built environments, allowing the reduction of electrical energy consumption of traditional air conditioner systems. Fundamentally, its operational principle is based on fluid mechanics and heat transfer, areas in which Constructal Design has been widely used to seek for the optimal geometries, i.e., which leads to the best performances. In spite of this fact, the employment of Constructal Design for improvement of the EAHE thermal potential has not been performed into literature. Therefore, the main purpose of this work is to perform a numerical investigation on different geometrical configurations of an EAHE using the Constructal Design to obtain the highest thermal potential. Results indicated that, for the same area occupied by the ducts and fixed mass flow rate of air, the increase of the number of ducts (complexity of geometry) improved the EAHE thermal performance up to approximately 73% for cooling and 115% for heating.

Suggested Citation

  • Kepes Rodrigues, Michel & da Silva Brum, Ruth & Vaz, Joaquim & Oliveira Rocha, Luiz Alberto & Domingues dos Santos, Elizaldo & Isoldi, Liércio André, 2015. "Numerical investigation about the improvement of the thermal potential of an Earth-Air Heat Exchanger (EAHE) employing the Constructal Design method," Renewable Energy, Elsevier, vol. 80(C), pages 538-551.
    • Handle: RePEc:eee:renene:v:80:y:2015:i:c:p:538-551
    DOI: 10.1016/j.renene.2015.02.041
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    1. Gao, Xiangkui & Xiao, Yimin & Gao, Penghui, 2022. "Thermal potential improvement of an earth-air heat exchanger (EAHE) by employing backfilling for deep underground emergency ventilation," Energy, Elsevier, vol. 250(C).
    2. Barakat, S. & Ramzy, Ahmed & Hamed, A.M. & El-Emam, S.H., 2019. "Augmentation of gas turbine performance using integrated EAHE and Fogging Inlet Air Cooling System," Energy, Elsevier, vol. 189(C).
    3. Bordoloi, Namrata & Sharma, Aashish & Nautiyal, Himanshu & Goel, Varun, 2018. "An intense review on the latest advancements of Earth Air Heat Exchangers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 89(C), pages 261-280.
    4. Singh, Ramkishore & Sawhney, R.L. & Lazarus, I.J. & Kishore, V.V.N., 2018. "Recent advancements in earth air tunnel heat exchanger (EATHE) system for indoor thermal comfort application: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 2162-2185.
    5. Rodrigues, Michel Kepes & Vaz, Joaquim & Oliveira Rocha, Luiz Alberto & Domingues dos Santos, Elizaldo & Isoldi, Liércio André, 2022. "A full approach to Earth-Air Heat Exchanger employing computational modeling, performance analysis and geometric evaluation," Renewable Energy, Elsevier, vol. 191(C), pages 535-556.
    6. Brum, Ruth S. & Ramalho, Jairo V.A. & Rodrigues, Michel K. & Rocha, Luiz A.O. & Isoldi, Liércio A. & Dos Santos, Elizaldo D., 2019. "Design evaluation of Earth-Air Heat Exchangers with multiple ducts," Renewable Energy, Elsevier, vol. 135(C), pages 1371-1385.
    7. H.Ali, Mohammed & Kurjak, Zoltan & Beke, Janos, 2023. "Investigation of earth air heat exchangers functioning in arid locations using Matlab/Simulink," Renewable Energy, Elsevier, vol. 209(C), pages 632-643.
    8. Martins, J.C. & Goulart, M.M. & Gomes, M. das N. & Souza, J.A. & Rocha, L.A.O. & Isoldi, L.A. & dos Santos, E.D., 2018. "Geometric evaluation of the main operational principle of an overtopping wave energy converter by means of Constructal Design," Renewable Energy, Elsevier, vol. 118(C), pages 727-741.
    9. Aldona Skotnicka-Siepsiak, 2020. "Operation of a Tube GAHE in Northeastern Poland in Spring and Summer—A Comparison of Real-World Data with Mathematically Modeled Data," Energies, MDPI, vol. 13(7), pages 1-15, April.
    10. Paludetto, Delphine & Lorente, Sylvie, 2016. "Modeling the heat exchanges between a datacenter and neighboring buildings through an underground loop," Renewable Energy, Elsevier, vol. 93(C), pages 502-509.
    11. Huijun Feng & Wei Tang & Lingen Chen & Junchao Shi & Zhixiang Wu, 2021. "Multi-Objective Constructal Optimization for Marine Condensers," Energies, MDPI, vol. 14(17), pages 1-18, September.
    12. Maoz & Saddam Ali & Noor Muhammad & Ahmad Amin & Mohammad Sohaib & Abdul Basit & Tanvir Ahmad, 2019. "Parametric Optimization of Earth to Air Heat Exchanger Using Response Surface Method," Sustainability, MDPI, vol. 11(11), pages 1-19, June.
    13. Amanowicz, Łukasz & Wojtkowiak, Janusz, 2020. "Approximated flow characteristics of multi-pipe earth-to-air heat exchangers for thermal analysis under variable airflow conditions," Renewable Energy, Elsevier, vol. 158(C), pages 585-597.
    14. Vieira, R.S. & Petry, A.P. & Rocha, L.A.O. & Isoldi, L.A. & dos Santos, E.D., 2017. "Numerical evaluation of a solar chimney geometry for different ground temperatures by means of constructal design," Renewable Energy, Elsevier, vol. 109(C), pages 222-234.
    15. Qin, Di & Liu, Zhengxuan & Zhou, Yuekuan & Yan, Zhongjun & Chen, Dachuan & Zhang, Guoqiang, 2021. "Dynamic performance of a novel air-soil heat exchanger coupling with diversified energy storage components—modelling development, experimental verification, parametrical design and robust operation," Renewable Energy, Elsevier, vol. 167(C), pages 542-557.

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