Impact of varying blower opening degrees on indoor environment and thermal comfort

Shi, Shengqiang, Merabtine, Abdelatif, Bennacer, Rachid et Kauffmann, Julien. 2024. « Impact of varying blower opening degrees on indoor environment and thermal comfort ». Fluid Dynamics and Materials Processing, vol. 20, nº 8. pp. 1703-1716.
Compte des citations dans Scopus : 1.

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Résumé

At present, air handling units are usually used indoors to improve the indoor environment quality. However, while introducing fresh air to improve air quality, air velocity has a certain impact on the occupants’ thermal comfort. Therefore, it is necessary to explore the optimization of air-fluid-body interaction dynamics. In this study, the indoor air flow was changed by changing the opening and closing degree of the blower, and the thermal manikin is introduced to objectively evaluate the human thermal comfort under different air velocities. The main experimental results show that the air change rate increases with the increase of the opening and closing degree of the blower considering an ACH (air changes per hour) range between 3.8 and 10. For a better prediction, a linear correlation with a coefficient of 0.995 is proposed. As the blower’s opening is adjusted to 20%, 25%, 30%, 35%, and 40%, the air velocity sensor positioned directly beneath the air inlet records average velocities of 0.19, 0.20, 0.21, 0.28, and 0.34 m/s over four hours, respectively. Observations on thermal comfort and the average sensation experienced by individuals indicate an initial increase followed by a decline when the blower’s operation begins, with optimal conditions achieved at a 35% opening. These findings offer valuable insights for future indoor air ventilation and heat transfer design strategies.

Type de document:	Article publié dans une revue, révisé par les pairs
Professeur:	Professeur Merabtine, Abdelatif
Affiliation:	Génie de la construction
Date de dépôt:	04 sept. 2024 19:46
Dernière modification:	12 sept. 2024 19:23
URI:	https://espace2.etsmtl.ca/id/eprint/29374

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