Patin, Mathieu et Rousse, Daniel R..
2025.
« Optimizing economic performances of foundation earth-to-air heat exchangers for low-technology residential air-conditioning ».
Energy and Buildings, vol. 328.
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Résumé
Despite its classification as a low-technology and nearly passive sustainable system, the use of earth-to-air heat exchangers in residential settings remains relatively uncommon, primarily due to the expenses associated with excavation. Nevertheless, positioning the heat exchanger around the building’s foundations during construction offers a potential solution to mitigate these costs. This study conducts an economic viability analysis for such a configuration, focusing on a typical single-family dwelling in Montr´eal, Canada. A sizing investigation revealed that ducts with relatively small diameters (approximately 20 cm), constructed from cost-effective materials, are optimal. These ducts should be placed as deep and as distant from the foundation as feasible. The optimal heat exchanger configuration reduces the building’s heating/cooling load by 701 kWh per year (4.3 %). However, despite minimal excavation expenses, the economic analysis suggests an unviable Levelized cost of Energy for the province of Quebec (0.182 US$.kWh▯ 1) compared to the low electricity rates in the area (a domestic fare of 0.059 US$.kWh▯ 1). The findings underscore notable losses attributable to thermal short-circuiting influenced by the basement walls and coupling affected by the mandatory Heat Recovery Ventilation system. Overall, it was determined that only 60 % of the sensible heat exchanged with the soil effectively contributes to load reduction.
| Type de document: | Article publié dans une revue, révisé par les pairs |
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| Professeur: | Professeur Rousse, Daniel R. |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 14 janv. 2025 16:29 |
| Dernière modification: | 29 janv. 2025 19:59 |
| URI: | https://espace2.etsmtl.ca/id/eprint/30463 |
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