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Title

Effects of sea-breeze natural ventilation on thermal comfort in low-rise buildings with diverse atrium roof shapes in BWh regions

Authors

[ 1 ] Instytut Architektury, Urbanistyki i Ochrony Dziedzictwa, Wydział Architektury, Politechnika Poznańska | [ SzD ] doctoral school student

Scientific discipline (Law 2.0)

[2.1] Architecture and urban planning

Year of publication

2023

Published in

Case Studies in Thermal Engineering

Journal year: 2023 | Journal volume: vol. 41

Article type

scientific article / paper

Publication language

english

Keywords
EN
  • atrium roof shapes
  • sea-breeze
  • natural ventilation
  • thermal comfort
  • Bushehr
  • BWh
Abstract

EN The purpose of this study is to evaluate the effects of the atrium ceiling on catching sea breeze, indoor thermal comfort, and natural ventilation in the buildings in coastal areas with BWh climate during warm seasons. This study was further sought to forerun the internal thermal comfort through Fanger's theory considering environmental and turbulence parameters in atrium-roofed low-rise buildings in BWh coastal areas, assuming that the results would be practical for engineers and designers in BWh onshore regions. To achieve these purposes, 12 atrium ceiling shapes have been studied in a three-story building in Bushehr (Iran) with BWh climate. Specimens were simulated in Ansys Fluent for 2:00 p.m. on 29th July as the hottest day of the year. The experimental data of wind tunnels have been employed to validate the results, with an observed 1.5% difference between CFD and experimental findings that confirm the validity of the data simulated. Specimen #12 which has a cube-shaped roof with a blade with distance on atrium output to create air pressure difference had the highest volumetric flow rate from the atrium outlet (2 m3 s−1) and the best condition in terms of natural ventilation. In addition, specimens #12 and #3 which has a cube-shaped form, and the atrium outlet was placed on the roof maintained the best performance in terms of thermal comfort than other specimens, with PMV values of 2.6 and 2.4, respectively. Furthermore, the PMV values are correlated with air velocity (r = 0.61), dry temperature (r = 0.72) and air pressure (r = 0.52) as the environmental parameters. The correlation coefficient has been calculated between PMV and Ti (r = 0.61), Tke (r = 0.45), and Tdf (r = 0.37). PPD had a substantial correlation with velocity (r = 0.71), temperature (r = 0.6) and air pressure (r = 0.45). Furthermore, the highest correlation coefficient has been observed between PPD and Ti (r = 0.54) and Tke (r = 0.37), and the least correlation has been seen between PMV and Tdf as r value equals 0.27.

Pages (from - to)

102638-1 - 102638-17

DOI

10.1016/j.csite.2022.102638

URL

https://www.sciencedirect.com/science/article/pii/S2214157X22008759?via%3Dihub

Comments

article number: 102638

License type

CC BY (attribution alone)

Open Access Mode

open journal

Open Access Text Version

final published version

Date of Open Access to the publication

at the time of publication

Full text of article

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Access level to full text

public

Ministry points / journal

70.0

Impact Factor

6.268 [List 2021]

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