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Outlets airflow velocity enhancement of an automotive hvac duct

Heating, ventilation, air-conditioning (HVAC) duct system for an automotive has a complex geometry due to space constraints in the engine compartment. This could reduce air pressure inside the duct, decreasing the airflow velocity at the HVAC outlets, and correspond to the intended value prescribed...

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Main Authors: Olleh, N., Kamar, H. M., Kamsah, N. B., Alhamid, M. Idrus
Format: Article
Published: Novel Carbon Resource Sciences 2021
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/95235/
http://dx.doi.org/10.5109/4372273
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spelling my.utm.952352022-04-29T22:25:25Z http://eprints.utm.my/id/eprint/95235/ Outlets airflow velocity enhancement of an automotive hvac duct Olleh, N. Kamar, H. M. Kamsah, N. B. Alhamid, M. Idrus TJ Mechanical engineering and machinery Heating, ventilation, air-conditioning (HVAC) duct system for an automotive has a complex geometry due to space constraints in the engine compartment. This could reduce air pressure inside the duct, decreasing the airflow velocity at the HVAC outlets, and correspond to the intended value prescribed by design. Higher air velocity at the ventilation outlets is desirable to promote thermal comfort in the passenger cabin. This study aims to enhance the airflow velocity and uniformity at each duct outlet by varying outlet geometry and duct elbow angles using the computational fluid dynamics (CFD) method. A typical HVAC duct of a C-segment car has been chosen as the case study. Steady-state parametric flow analyses were conducted to determine the duct geometry that would significantly improve the airflow uniformity and velocity at the duct outlets. It was found that a combination of circular outlets with a 65° elbow angle results in the best improvement in the airflow velocity distribution inside the duct. It was also found that the airflow velocity at the outlets increases between 4% to 9% compared to the baseline design. The air velocity difference between all outlets is around 1.3%, which can be considered negligibly small. Novel Carbon Resource Sciences 2021 Article PeerReviewed Olleh, N. and Kamar, H. M. and Kamsah, N. B. and Alhamid, M. Idrus (2021) Outlets airflow velocity enhancement of an automotive hvac duct. Evergreen, 8 (1). pp. 163-169. ISSN 2189-0420 http://dx.doi.org/10.5109/4372273
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Olleh, N.
Kamar, H. M.
Kamsah, N. B.
Alhamid, M. Idrus
Outlets airflow velocity enhancement of an automotive hvac duct
description Heating, ventilation, air-conditioning (HVAC) duct system for an automotive has a complex geometry due to space constraints in the engine compartment. This could reduce air pressure inside the duct, decreasing the airflow velocity at the HVAC outlets, and correspond to the intended value prescribed by design. Higher air velocity at the ventilation outlets is desirable to promote thermal comfort in the passenger cabin. This study aims to enhance the airflow velocity and uniformity at each duct outlet by varying outlet geometry and duct elbow angles using the computational fluid dynamics (CFD) method. A typical HVAC duct of a C-segment car has been chosen as the case study. Steady-state parametric flow analyses were conducted to determine the duct geometry that would significantly improve the airflow uniformity and velocity at the duct outlets. It was found that a combination of circular outlets with a 65° elbow angle results in the best improvement in the airflow velocity distribution inside the duct. It was also found that the airflow velocity at the outlets increases between 4% to 9% compared to the baseline design. The air velocity difference between all outlets is around 1.3%, which can be considered negligibly small.
format Article
author Olleh, N.
Kamar, H. M.
Kamsah, N. B.
Alhamid, M. Idrus
author_facet Olleh, N.
Kamar, H. M.
Kamsah, N. B.
Alhamid, M. Idrus
author_sort Olleh, N.
title Outlets airflow velocity enhancement of an automotive hvac duct
title_short Outlets airflow velocity enhancement of an automotive hvac duct
title_full Outlets airflow velocity enhancement of an automotive hvac duct
title_fullStr Outlets airflow velocity enhancement of an automotive hvac duct
title_full_unstemmed Outlets airflow velocity enhancement of an automotive hvac duct
title_sort outlets airflow velocity enhancement of an automotive hvac duct
publisher Novel Carbon Resource Sciences
publishDate 2021
url http://eprints.utm.my/id/eprint/95235/
http://dx.doi.org/10.5109/4372273
_version_ 1732945448414478336
score 13.211869

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