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Performance Analysis of Air Cooled Heat Pump Coupled with Horizontal Air Ground Heat Exchanger in the Mediterranean Climate

Author

Listed:
  • Cristina Baglivo

    (Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy)

  • Sara Bonuso

    (Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy)

  • Paolo Maria Congedo

    (Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy)

Abstract

A concept of Air-Cooled Heat Pump (ACHP) coupled with a Horizontal Air-Ground Heat Exchanger (HAGHE), also called Horizontal Earth-To-Air Heat Exchanger (EAHX), has been proposed. The Air-Cooled Heat Pump is a system which transfers heat from outside source (air) to inside sink (water) and vice versa in summertime. The innovation is to provide a geothermal treatment of pre-heating/cooling of air before meeting the evaporator in winter or the condenser in summer of the heat pump. Besides, it is known that the variations of the ground temperature, respect to the external air one, are mitigated already in the first layers of the ground throughout the year, due to the high thermal inertia of the ground, letting the heat pump work with more mitigated conditions, improving the performances. The behaviour of HAGHE has been investigated by varying the length and the installation depth of the probes, the air flow rate and the ground thermal properties. All the combinations have been implemented using TRNSYS 17 software (Transient System Simulation Program) to obtain the outlet temperatures from HAGHE, resulting from the 54 configurations. The results are compared in terms of Coefficient of Performance (COP) in wintertime and Energy Efficiency Ratio (EER) in summertime between configurations with and without the coupling with HAGHE. In addition, two seasonal performance SCOP and SEER coefficients have been calculated considering, not only the inlet air temperatures into the Air-Cooled Heat Pump, but also their frequency of occurrence, the off-set external temperature (16 °C), the nominal external temperature and heating and cooling loads.

Suggested Citation

  • Cristina Baglivo & Sara Bonuso & Paolo Maria Congedo, 2018. "Performance Analysis of Air Cooled Heat Pump Coupled with Horizontal Air Ground Heat Exchanger in the Mediterranean Climate," Energies, MDPI, vol. 11(10), pages 1-21, October.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2704-:d:174802
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    References listed on IDEAS

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    1. Genchi, Yutaka & Kikegawa, Yukihiro & Inaba, Atsushi, 2002. "CO2 payback-time assessment of a regional-scale heating and cooling system using a ground source heat-pump in a high energy-consumption area in Tokyo," Applied Energy, Elsevier, vol. 71(3), pages 147-160, March.
    2. Cristina Baglivo & Delia D’Agostino & Paolo Maria Congedo, 2018. "Design of a Ventilation System Coupled with a Horizontal Air-Ground Heat Exchanger (HAGHE) for a Residential Building in a Warm Climate," Energies, MDPI, vol. 11(8), pages 1-27, August.
    3. Saner, Dominik & Juraske, Ronnie & Kübert, Markus & Blum, Philipp & Hellweg, Stefanie & Bayer, Peter, 2010. "Is it only CO2 that matters? A life cycle perspective on shallow geothermal systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(7), pages 1798-1813, September.
    4. Paolo Maria Congedo & Caterina Lorusso & Maria Grazia De Giorgi & Domenico Laforgia, 2014. "Computational Fluid Dynamic Modeling of Horizontal Air-Ground Heat Exchangers (HAGHE) for HVAC Systems," Energies, MDPI, vol. 7(12), pages 1-18, December.
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    Cited by:

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    8. Cristina Sáez Blázquez & Ignacio Martín Nieto & Javier Carrasco García & Pedro Carrasco García & Arturo Farfán Martín & Diego González-Aguilera, 2023. "Comparative Analysis of Ground Source and Air Source Heat Pump Systems under Different Conditions and Scenarios," Energies, MDPI, vol. 16(3), pages 1-16, January.
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    10. Piotr Michalak, 2022. "Impact of Air Density Variation on a Simulated Earth-to-Air Heat Exchanger’s Performance," Energies, MDPI, vol. 15(9), pages 1-24, April.

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