Experimental and Hybrid Numerical Analytical Approach of an Earth-to-Air Heat Exchanger
The primary goal of this paper is to assess the thermal behaviour of Earth-to-Air Heat Exchanger (EAHE) under continuous operation mode during the cooling period in warm climatic conditions. An experimental setup was conducted in Biskra University (Algeria) to test the ability to use EAHE as an alte...
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| Format: | Article |
| Language: | English |
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Sciendo
2023-12-01
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| Series: | Annals of West University of Timisoara: Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.2478/awutp-2023-0008 |
| _version_ | 1827589941873344512 |
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| author | Aissaoui Faris Rouag Amar Belloufi Yousef Zerouali Sakina Atmani Rachid Benchabane Adel Brima Abdelhafid Moummi Noureddine Belatrache Djamel |
| author_facet | Aissaoui Faris Rouag Amar Belloufi Yousef Zerouali Sakina Atmani Rachid Benchabane Adel Brima Abdelhafid Moummi Noureddine Belatrache Djamel |
| author_sort | Aissaoui Faris |
| collection | DOAJ |
| description | The primary goal of this paper is to assess the thermal behaviour of Earth-to-Air Heat Exchanger (EAHE) under continuous operation mode during the cooling period in warm climatic conditions. An experimental setup was conducted in Biskra University (Algeria) to test the ability to use EAHE as an alternative solution to conventional air conditioning systems. Besides, a transient numerical approach for the flowing air within the EAHE was developed using energy balance equations, discretised by the implicit finite differences method and solved by Thomas method. Furthermore, the transient temperature profile of the soil around the EAHE was investigated in order to determine the adiabatic radius of the soil as a function of the duration of operation. In this context, a transient semi-analytical model was integrated to the air model to estimate the transient EAHE’s performance deterioration. This deterioration is produced by the thermal saturation of the soil, which is influenced by the heat released from the air inside the pipe. Results showed that continuous operation for a duration of four days has minimal impact on the outlet air temperatures due to the implementation of night purging. Furthermore, the design and thermal efficiency of the EAHE are impacted by factors such as higher air velocity and reduced soil thermal conductivity. |
| first_indexed | 2024-03-09T01:09:41Z |
| format | Article |
| id | doaj.art-7b31287345d3469fb81c5e8fdc47d0e3 |
| institution | Directory Open Access Journal |
| issn | 2784-1057 |
| language | English |
| last_indexed | 2024-03-09T01:09:41Z |
| publishDate | 2023-12-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Annals of West University of Timisoara: Physics |
| spelling | doaj.art-7b31287345d3469fb81c5e8fdc47d0e32023-12-11T07:37:19ZengSciendoAnnals of West University of Timisoara: Physics2784-10572023-12-016519711510.2478/awutp-2023-0008Experimental and Hybrid Numerical Analytical Approach of an Earth-to-Air Heat ExchangerAissaoui Faris0Rouag Amar1Belloufi Yousef2Zerouali Sakina3Atmani Rachid4Benchabane Adel5Brima Abdelhafid6Moummi Noureddine7Belatrache Djamel81Université de Ghardaia, Faculté des sciences et de la technologie, Département d’Automatique et Electromécanique, Ghardaia47000, Algeria.3Université Kasdi Merbah Ouargla, Faculté des Hydrocarbures, des Energies Renouvelables, des Sciences de la Terre et de l’Univers, Département des Energies Renouvelables, BP 511 Ouargla 30000, Algeria5Université Kasdi Merbah Ouargla, Faculté des Hydrocarbures, des Energies Renouvelables, des Sciences de la Terre et de l’Univers, Département de Forage et Mécanique des Chantiers Pétroliers, BP 511 Ouargla 30000, Algeria.6Université Mostefa Ben Boulaïd Batna 2, Faculté de Technologie, Département de Socle Commun Science et Technique, BP 05078 Fesdis-Batna, Algeria.2Laboratoire de Génie Mécanique (LGM), Université Mohamed Khider Biskra, BP 145 Biskra 07000, Algeria.4Laboratoire de Génie Energétique et Matériaux (LGEM), Université Mohamed Khider Biskra, BP 145 Biskra 07000, Algeria.2Laboratoire de Génie Mécanique (LGM), Université Mohamed Khider Biskra, BP 145 Biskra 07000, Algeria.2Laboratoire de Génie Mécanique (LGM), Université Mohamed Khider Biskra, BP 145 Biskra 07000, Algeria.3Université Kasdi Merbah Ouargla, Faculté des Hydrocarbures, des Energies Renouvelables, des Sciences de la Terre et de l’Univers, Département des Energies Renouvelables, BP 511 Ouargla 30000, AlgeriaThe primary goal of this paper is to assess the thermal behaviour of Earth-to-Air Heat Exchanger (EAHE) under continuous operation mode during the cooling period in warm climatic conditions. An experimental setup was conducted in Biskra University (Algeria) to test the ability to use EAHE as an alternative solution to conventional air conditioning systems. Besides, a transient numerical approach for the flowing air within the EAHE was developed using energy balance equations, discretised by the implicit finite differences method and solved by Thomas method. Furthermore, the transient temperature profile of the soil around the EAHE was investigated in order to determine the adiabatic radius of the soil as a function of the duration of operation. In this context, a transient semi-analytical model was integrated to the air model to estimate the transient EAHE’s performance deterioration. This deterioration is produced by the thermal saturation of the soil, which is influenced by the heat released from the air inside the pipe. Results showed that continuous operation for a duration of four days has minimal impact on the outlet air temperatures due to the implementation of night purging. Furthermore, the design and thermal efficiency of the EAHE are impacted by factors such as higher air velocity and reduced soil thermal conductivity.https://doi.org/10.2478/awutp-2023-0008shallow geothermal heat exchangersearth-to-air heat exchangersoil radiushybrid numerical analytical approachcontinuous operation |
| spellingShingle | Aissaoui Faris Rouag Amar Belloufi Yousef Zerouali Sakina Atmani Rachid Benchabane Adel Brima Abdelhafid Moummi Noureddine Belatrache Djamel Experimental and Hybrid Numerical Analytical Approach of an Earth-to-Air Heat Exchanger Annals of West University of Timisoara: Physics shallow geothermal heat exchangers earth-to-air heat exchanger soil radius hybrid numerical analytical approach continuous operation |
| title | Experimental and Hybrid Numerical Analytical Approach of an Earth-to-Air Heat Exchanger |
| title_full | Experimental and Hybrid Numerical Analytical Approach of an Earth-to-Air Heat Exchanger |
| title_fullStr | Experimental and Hybrid Numerical Analytical Approach of an Earth-to-Air Heat Exchanger |
| title_full_unstemmed | Experimental and Hybrid Numerical Analytical Approach of an Earth-to-Air Heat Exchanger |
| title_short | Experimental and Hybrid Numerical Analytical Approach of an Earth-to-Air Heat Exchanger |
| title_sort | experimental and hybrid numerical analytical approach of an earth to air heat exchanger |
| topic | shallow geothermal heat exchangers earth-to-air heat exchanger soil radius hybrid numerical analytical approach continuous operation |
| url | https://doi.org/10.2478/awutp-2023-0008 |
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