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Dynamic thermal simulation of horizontal ground heat exchangers for renewable heating and ventilation of buildings

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  • Gan, Guohui

Abstract

A ground heat exchanger is used to transfer thermal energy stored in soil in order to provide renewable heating, cooling and ventilation of a building. A computer program has been developed for simulation of the dynamic thermal performance of horizontally coupled earth-liquid heat exchanger for a ground source heat pump and earth-air heat exchanger for building ventilation. Neglecting the dynamic interactions between a heat exchanger and environments would significantly over predict its thermal performance and in terms of the amount of daily heat transfer the level of over-prediction could be as much as 463% for an earth-liquid heat exchanger and more than 100% for an earth-air heat exchanger. The daily heat transfer increases with soil moisture and for an earth-liquid heat exchanger the increase is between 3% and 35% with increase in moisture from 0.22 to 0.3 m3/m3 depending on the magnitude of heat transfer. Heat transfer through a plastic earth-liquid heat exchanger can be increased by 10%–12% if its thermal properties are improved to the same as surrounding soil. The increase is smaller between 2% and 4% for an earth-air heat exchanger. In addition, an earth-liquid heat exchanger is more efficient than an earth-air heat exchanger.

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  • Gan, Guohui, 2017. "Dynamic thermal simulation of horizontal ground heat exchangers for renewable heating and ventilation of buildings," Renewable Energy, Elsevier, vol. 103(C), pages 361-371.
    • Handle: RePEc:eee:renene:v:103:y:2017:i:c:p:361-371
    DOI: 10.1016/j.renene.2016.11.052
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    References listed on IDEAS

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    2. Ascione, Fabrizio & Borrelli, Martina & De Masi, Rosa Francesca & Vanoli, Giuseppe Peter, 2020. "Hourly operational assessment of HVAC systems in Mediterranean Nearly Zero-Energy Buildings: Experimental evaluation of the potential of ground cooling of ventilation air," Renewable Energy, Elsevier, vol. 155(C), pages 950-968.
    3. 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.
    4. 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.
    5. Bai, Yufu & Long, Tianhe & Li, Wuyan & Li, Yongcai & Liu, Shuli & Wang, Zhihao & Lu, Jun & Huang, Sheng, 2022. "Experimental investigation of natural ventilation characteristics of a solar chimney coupled with earth-air heat exchanger (SCEAHE) system in summer and winter," Renewable Energy, Elsevier, vol. 193(C), pages 1001-1018.
    6. Lin, Jian & Nowamooz, Hossein & Braymand, Sandrine & Wolff, Patrice & Fond, Christophe, 2020. "Impact of soil moisture on the long-term energy performance of an earth-air heat exchanger system," Renewable Energy, Elsevier, vol. 147(P2), pages 2676-2687.
    7. Cuny, Mathias & Lin, Jian & Siroux, Monica & Fond, Christophe, 2020. "Influence of rainfall events on the energy performance of an earth-air heat exchanger embedded in a multilayered soil," Renewable Energy, Elsevier, vol. 147(P2), pages 2664-2675.
    8. Agrawal, Kamal Kumar & Misra, Rohit & Yadav, Tejpal & Agrawal, Ghanshyam Das & Jamuwa, Doraj Kamal, 2018. "Experimental study to investigate the effect of water impregnation on thermal performance of earth air tunnel heat exchanger for summer cooling in hot and arid climate," Renewable Energy, Elsevier, vol. 120(C), pages 255-265.
    9. Gan, Guohui, 2018. "Dynamic thermal performance of horizontal ground source heat pumps – The impact of coupled heat and moisture transfer," Energy, Elsevier, vol. 152(C), pages 877-887.
    10. Sławomir Rabczak & Paweł Kut, 2020. "Analysis of Yearly Effectiveness of a Diaphragm Ground Heat Exchanger Supported by an Ultraviolet Sterilamp," Energies, MDPI, vol. 13(11), pages 1-7, June.
    11. Taurines, Kevin & Giroux-Julien, Stéphanie & Farid, Mohammed & Ménézo, Christophe, 2021. "Numerical modelling of a building integrated earth-to-air heat exchanger," Applied Energy, Elsevier, vol. 296(C).

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