Lattieff, FA, Atiya, MA, Lateef, RA, Dulaimi, AF, Jweeg, MJ, Abed, AM, Mahdi, JM and Talebizadehsardari, P (2022) Thermal analysis of horizontal earth-air heat exchangers in a subtropical climate: An experimental study. Frontiers in Built Environment, 8. ISSN 2297-3362

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Abstract

The earth-air heat exchanger (EHX) has a promising potential to passively save the energy consumption of traditional air conditioning systems while maintaining a high degree of indoor comfort. The use of EHX systems for air conditioning in commercial and industrial settings offers several environmental benefits and is capable of operating in both standalone and hybrid modes. This study tests the performance and effectiveness of an EHX design in a sandy soil area in Baghdad, Iraq. The area has a climate of the subtropical semi-humid type. Ambient air temperatures and soil temperatures were recorded throughout the months of 2021. During the months of January and June, the temperatures of the inlet and outflow air at varying air velocities were monitored concurrently in 10-min increments at each location. Further numerical and thermodynamical analyses of the measurements were conducted to reveal the influencing performance parameters. The highest temperature rises of air between the input and exit sections were determined as 12.3°C (January) and 17.2°C (June). It is found that the maximum values of effectiveness are 0.80 and 0.81, while coefficients of performance are 1.6 and 1.8 for January and June, respectively. It is also found that the EHX shows good functionality and effectiveness, with potential energy savings for equipment for cooling and heating under different weather conditions.

Item Type:	Article
Divisions:	Civil Engineering & Built Environment
Publisher:	Frontiers Media S.A.
SWORD Depositor:	A Symplectic
Date Deposited:	10 Jan 2023 13:00
Last Modified:	10 Jan 2023 13:00
DOI or ID number:	10.3389/fbuil.2022.981946
URI:	https://researchonline.ljmu.ac.uk/id/eprint/18604

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