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A techno-economic analysis of geothermal ejector cooling system

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  • Habibi, Mohammad
  • Aligolzadeh, Farid
  • Hakkaki-Fard, Ali

Abstract

Ground-coupled ejector cooling (GCEC) systems have been introduced to solve the air-coupled ejector cooling (ACEC) systems problems. To date, no research study is dedicated to compare the GCEC and the ACEC systems and determine the relative payback period of the GCEC system vs. the ACEC system. Furthermore, almost all the previous studies simulated the GCEC systems by elementary models. Therefore, a comprehensive simulation is conducted to assess the techno-economic performance of a GCEC system. The model consists of the ejector and the borehole heat exchanger submodels. The first section of the results compares the ACEC system and the GCEC system during a cooling season. The seasonal coefficient of performance of the GCEC system is 83% higher than that of the ACEC system. The maximum building load per borehole heat exchanger unit length is 12.4, 17.5, and 21.6 W/m when the soil thermal conductivity is 1.40, 2.45, 3.50 W/(m.K), respectively. The second section of the results compares the relative payback period of the GCEC systems vs. the ACEC system for different values of soil thermal conductivities, borehole cost, and natural gas price. The relative payback period of the GCEC system vs. the ACEC system can be as low as five years.

Suggested Citation

  • Habibi, Mohammad & Aligolzadeh, Farid & Hakkaki-Fard, Ali, 2020. "A techno-economic analysis of geothermal ejector cooling system," Energy, Elsevier, vol. 193(C).
    • Handle: RePEc:eee:energy:v:193:y:2020:i:c:s0360544219324557
    DOI: 10.1016/j.energy.2019.116760
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    References listed on IDEAS

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    5. Soheil Kavian & Mohsen Saffari Pour & Ali Hakkaki-Fard, 2019. "Optimized Design of the District Heating System by Considering the Techno-Economic Aspects and Future Weather Projection," Energies, MDPI, vol. 12(9), pages 1-30, May.
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    Cited by:

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    2. Kavian, Soheil & Aghanajafi, Cyrus & Jafari Mosleh, Hassan & Nazari, Arash & Nazari, Ashkan, 2020. "Exergy, economic and environmental evaluation of an optimized hybrid photovoltaic-geothermal heat pump system," Applied Energy, Elsevier, vol. 276(C).
    3. Jia, Jie & Lee, W.L. & Cheng, Yuanda & Tian, Qi, 2021. "Can reversible room air-conditioner be used for combined space and domestic hot water heating in subtropical dwellings? Techno-economic evidence from Hong Kong," Energy, Elsevier, vol. 223(C).
    4. Ingen Perser & Ian Alistair Frigaard, 2022. "A Comprehensive Study on Intermittent Operation of Horizontal Deep Borehole Heat Exchangers," Energies, MDPI, vol. 15(1), pages 1-27, January.
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    6. Abdelazim Abbas Ahmed & Mohsen Assadi & Adib Kalantar & Tomasz Sliwa & Aneta Sapińska-Śliwa, 2022. "A Critical Review on the Use of Shallow Geothermal Energy Systems for Heating and Cooling Purposes," Energies, MDPI, vol. 15(12), pages 1-22, June.

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