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Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate

Universiti Tun Hussein Onn Malaysia (UTHM) elibrary is in the hot and humid tropical climate of Malaysia and has a distinctive feature of a circular courtyard and semi-outdoor spaces for practical public spaces and energy saving. This study was conducted on the ground level of the library which con...

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Main Authors: Allah, Mohammad Zaraa, Harir, Azian, Mohamed Kamar, Haslinda
Format: Article
Language:English
Published: semarak ilmu 2023
Subjects:
TJ170-179 Mechanics applied to machinery. Dynamics
Online Access:http://eprints.uthm.edu.my/9751/1/J15719_8a51fe3b989136de87b9ddeb32506ee6.pdf
http://eprints.uthm.edu.my/9751/
https://doi.org/10.37934/arfmts.101.1.4558
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spelling my.uthm.eprints.97512023-09-13T03:50:51Z http://eprints.uthm.edu.my/9751/ Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate Allah, Mohammad Zaraa Harir, Azian Mohamed Kamar, Haslinda TJ170-179 Mechanics applied to machinery. Dynamics Universiti Tun Hussein Onn Malaysia (UTHM) elibrary is in the hot and humid tropical climate of Malaysia and has a distinctive feature of a circular courtyard and semi-outdoor spaces for practical public spaces and energy saving. This study was conducted on the ground level of the library which consists of an open terrace consisting of a cafeteria, a garden in the circular courtyard, and an air-conditioned seminar room. This study aimed to compare the thermal comfort condition of these spaces through physical and subjective measurements. Physical measurement was conducted for air temperature, relative humidity, air velocity and mean radiant temperature at the two selected sampling points on each investigated area positioned at 0.6 meters from the floor. Data were collected for three days in each area during two periods of time; 9 to 11 am and 2 to 4 pm. Subjective measurements were also collected through the distributed questionnaire to 150 respondents to determine the thermal sensation votes (TSV) of each investigated area. Calculations based on physical measurement showed the thermal comfort for both the cafeteria and garden were within 90% thermal comfort acceptability limit. PMV value for the air-conditioned seminar room was -0.45 with a PPD value of 9.03%. Both results complied with the ASHRAE 55 Standards for the acceptable condition for both naturally and air-conditioned spaces. The regression analysis showed that the comfort air temperature range based on the human response method for semi-outdoor spaces and indoor spaces were 24.8 0C to 29.0 0C and 20 0C to 23.5 0C respectively. The PMV regression analysis showed that the comfort air temperature range for indoor space was 22.4 0C to 23.5 0C. Results of the study showed that respondents perceived a higher comfort temperature range in the courtyard and cafeteria compared to indoor airconditioned spaces, but still within the recommended range of ASHRAE 55 standard. The results of the study concluded that semi-outdoor places can potentially be designed as practical public spaces for comfortable and sustainable spaces. semarak ilmu 2023 Article PeerReviewed text en http://eprints.uthm.edu.my/9751/1/J15719_8a51fe3b989136de87b9ddeb32506ee6.pdf Allah, Mohammad Zaraa and Harir, Azian and Mohamed Kamar, Haslinda (2023) Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 101 (1). pp. 45-58. ISSN 2289-7879 https://doi.org/10.37934/arfmts.101.1.4558
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic TJ170-179 Mechanics applied to machinery. Dynamics
spellingShingle TJ170-179 Mechanics applied to machinery. Dynamics
Allah, Mohammad Zaraa
Harir, Azian
Mohamed Kamar, Haslinda
Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate
description Universiti Tun Hussein Onn Malaysia (UTHM) elibrary is in the hot and humid tropical climate of Malaysia and has a distinctive feature of a circular courtyard and semi-outdoor spaces for practical public spaces and energy saving. This study was conducted on the ground level of the library which consists of an open terrace consisting of a cafeteria, a garden in the circular courtyard, and an air-conditioned seminar room. This study aimed to compare the thermal comfort condition of these spaces through physical and subjective measurements. Physical measurement was conducted for air temperature, relative humidity, air velocity and mean radiant temperature at the two selected sampling points on each investigated area positioned at 0.6 meters from the floor. Data were collected for three days in each area during two periods of time; 9 to 11 am and 2 to 4 pm. Subjective measurements were also collected through the distributed questionnaire to 150 respondents to determine the thermal sensation votes (TSV) of each investigated area. Calculations based on physical measurement showed the thermal comfort for both the cafeteria and garden were within 90% thermal comfort acceptability limit. PMV value for the air-conditioned seminar room was -0.45 with a PPD value of 9.03%. Both results complied with the ASHRAE 55 Standards for the acceptable condition for both naturally and air-conditioned spaces. The regression analysis showed that the comfort air temperature range based on the human response method for semi-outdoor spaces and indoor spaces were 24.8 0C to 29.0 0C and 20 0C to 23.5 0C respectively. The PMV regression analysis showed that the comfort air temperature range for indoor space was 22.4 0C to 23.5 0C. Results of the study showed that respondents perceived a higher comfort temperature range in the courtyard and cafeteria compared to indoor airconditioned spaces, but still within the recommended range of ASHRAE 55 standard. The results of the study concluded that semi-outdoor places can potentially be designed as practical public spaces for comfortable and sustainable spaces.
format Article
author Allah, Mohammad Zaraa
Harir, Azian
Mohamed Kamar, Haslinda
author_facet Allah, Mohammad Zaraa
Harir, Azian
Mohamed Kamar, Haslinda
author_sort Allah, Mohammad Zaraa
title Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate
title_short Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate
title_full Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate
title_fullStr Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate
title_full_unstemmed Comparison of Thermal Comfort Condition of Naturally Ventilated Courtyard, Semi-Outdoor and Indoor Air Conditioned Spaces in Tropical Climate
title_sort comparison of thermal comfort condition of naturally ventilated courtyard, semi-outdoor and indoor air conditioned spaces in tropical climate
publisher semarak ilmu
publishDate 2023
url http://eprints.uthm.edu.my/9751/1/J15719_8a51fe3b989136de87b9ddeb32506ee6.pdf
http://eprints.uthm.edu.my/9751/
https://doi.org/10.37934/arfmts.101.1.4558
_version_ 1778164189878026240
score 13.211869

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