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Comparative study of straight and spiral earth air tunnel heat exchanger system operated in cooling and heating modes

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  • Mathur, Anuj
  • Priyam,
  • Mathur, Sanjay
  • Agrawal, G.D.
  • Mathur, Jyotirmay

Abstract

Thermal performance of Earth Air Tunnel Heat Exchanger (EATHE) system is found to be highly dependent on thermal properties of soil and soil with poor thermal properties require longer buried pipe for desired heat exchange between air and sub-soil. In densely populated country like India, EATHE systems are rarely used due to the limited ground space (higher aspect ratio in terms of length) in most of the residential and commercial applications. Therefore, in this paper, problem of space limitation for the installation of straight EATHE system is attempted by proposing new spiral shaped EATHE system. The developed EATHE systems were used to determine cooling and heating potential individually and COP were 5.94 and 6.24 in summer; 1.92 and 2.11 in winter for straight and spiral respectively. A transient numerical model has been developed to investigate the performance of both systems. The COP were 4.23 and 4.48 in summer; 5.0 and 5.16 in winter for straight and spiral respectively. The experimental and numerical results suggested that the thermal performance of these two systems are comparable can be interchanged based on available site conditions.

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  • Mathur, Anuj & Priyam, & Mathur, Sanjay & Agrawal, G.D. & Mathur, Jyotirmay, 2017. "Comparative study of straight and spiral earth air tunnel heat exchanger system operated in cooling and heating modes," Renewable Energy, Elsevier, vol. 108(C), pages 474-487.
    • Handle: RePEc:eee:renene:v:108:y:2017:i:c:p:474-487
    DOI: 10.1016/j.renene.2017.03.001
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    References listed on IDEAS

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    1. Mathur, Anuj & Surana, Ankit Kumar & Mathur, Sanjay, 2016. "Numerical investigation of the performance and soil temperature recovery of an EATHE system under intermittent operations," Renewable Energy, Elsevier, vol. 95(C), pages 510-521.
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    3. Zarrella, Angelo & Capozza, Antonio & De Carli, Michele, 2013. "Analysis of short helical and double U-tube borehole heat exchangers: A simulation-based comparison," Applied Energy, Elsevier, vol. 112(C), pages 358-370.
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    Cited by:

    1. Li, Hui & Ni, Long & Liu, Guang & Zhao, Zisang & Yao, Yang, 2019. "Feasibility study on applications of an Earth-air Heat Exchanger (EAHE) for preheating fresh air in severe cold regions," Renewable Energy, Elsevier, vol. 133(C), pages 1268-1284.
    2. Zukowski, Mroslaw & Topolanska, Justyna, 2018. "Comparison of thermal performance between tube and plate ground-air heat exchangers," Renewable Energy, Elsevier, vol. 115(C), pages 697-710.
    3. Akhtari, Mohammad Reza & Shayegh, Iman & Karimi, Nader, 2020. "Techno-economic assessment and optimization of a hybrid renewable earth - air heat exchanger coupled with electric boiler, hydrogen, wind and PV configurations," Renewable Energy, Elsevier, vol. 148(C), pages 839-851.
    4. Lebbihiat, Nacer & Atia, Abdelmalek & Arıcı, Müslüm & Meneceur, Noureddine & Hadjadj, Abdessamia & Chetioui, Youcef, 2022. "Thermal performance analysis of helical ground-air heat exchanger under hot climate: In situ measurement and numerical simulation," Energy, Elsevier, vol. 254(PC).
    5. 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.
    6. Eduardo de la Rocha Camba & Fontina Petrakopoulou, 2020. "Earth-Cooling Air Tunnels for Thermal Power Plants: Initial Design by CFD Modelling," Energies, MDPI, vol. 13(4), pages 1-19, February.
    7. Liu, Zhongbing & Zhang, Yelin & Zhang, Ling & Luo, Yongqiang & Wu, Zhenghong & Wu, Jing & Yin, Yingde & Hou, Guoqing, 2018. "Modeling and simulation of a photovoltaic thermal-compound thermoelectric ventilator system," Applied Energy, Elsevier, vol. 228(C), pages 1887-1900.
    8. Adriana Greco & Claudia Masselli, 2020. "The Optimization of the Thermal Performances of an Earth to Air Heat Exchanger for an Air Conditioning System: A Numerical Study," Energies, MDPI, vol. 13(23), pages 1-25, December.
    9. Naili, Nabiha & Kooli, Sami, 2021. "Solar-assisted ground source heat pump system operated in heating mode: A case study in Tunisia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 145(C).

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