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Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space

Majority of residents in many urban and suburban areas, especially in Southeast Asia, have seen a significant increase in time spent indoors over the past decade. It is not unusual for residents in these areas spending 70 - 90 % of their lives indoor either in home or office, and often in poorly ven...

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Main Authors:	Ho, Xinyou, Ho, Wai Shin, Wong, Keng Yinn, Hassim, Mimi Haryani, Hashim, Haslenda, Ab. Muis, Zarina, Yunus, Nor Alafiza, Ling, Gabriel Hoh Teck
Format:	Article
Published:	Italian Association of Chemical Engineering - AIDIC 2021
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/94920/ http://dx.doi.org/10.3303/CET2183032
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id	my.utm.94920
record_format	eprints
spelling	my.utm.949202022-04-29T22:32:24Z http://eprints.utm.my/id/eprint/94920/ Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space Ho, Xinyou Ho, Wai Shin Wong, Keng Yinn Hassim, Mimi Haryani Hashim, Haslenda Ab. Muis, Zarina Yunus, Nor Alafiza Ling, Gabriel Hoh Teck TP Chemical technology Majority of residents in many urban and suburban areas, especially in Southeast Asia, have seen a significant increase in time spent indoors over the past decade. It is not unusual for residents in these areas spending 70 - 90 % of their lives indoor either in home or office, and often in poorly ventilated rooms. These rooms are usually outfitted with ductless air conditioning (also known as room air conditioner) with no supply of fresh air for ventilation. The build-up of indoor air pollutants such as CO2, pathogens, and various volatile organic compounds in poorly ventilated room have been shown to be detrimental to both health and well-being its human occupants. This work aims to study the effect of introducing fresh air via a supply vent on the airflow within the room, while keeping track of the corresponding increase of energy consumption in the form of cooling capacity caused by ventilating warm fresh air into the room. To carry out this study, an air change per hour (ACH) of 10 supplied through different vent heights are simulated using a validated computational fluid dynamics model to investigate the behaviour of temperature, airflow, and energy consumption for five different vent-position cases. The simulation simulated case suggests that up to 27.7 % of a 1.0 horsepower (2.67 kW) air conditioner’s cooling capacity may be required to maintain the room at 22 °C with noticeable difference in airflow pattern within the room depending on the vent position. These findings will serve as a guideline for practical applications in designing ventilation systems in a small-to-medium enclosed space. Italian Association of Chemical Engineering - AIDIC 2021 Article PeerReviewed Ho, Xinyou and Ho, Wai Shin and Wong, Keng Yinn and Hassim, Mimi Haryani and Hashim, Haslenda and Ab. Muis, Zarina and Yunus, Nor Alafiza and Ling, Gabriel Hoh Teck (2021) Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space. Chemical Engineering Transactions, 83 . pp. 187-192. ISSN 2283-9216 (In Press) http://dx.doi.org/10.3303/CET2183032
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	TP Chemical technology
spellingShingle	TP Chemical technology Ho, Xinyou Ho, Wai Shin Wong, Keng Yinn Hassim, Mimi Haryani Hashim, Haslenda Ab. Muis, Zarina Yunus, Nor Alafiza Ling, Gabriel Hoh Teck Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space
description	Majority of residents in many urban and suburban areas, especially in Southeast Asia, have seen a significant increase in time spent indoors over the past decade. It is not unusual for residents in these areas spending 70 - 90 % of their lives indoor either in home or office, and often in poorly ventilated rooms. These rooms are usually outfitted with ductless air conditioning (also known as room air conditioner) with no supply of fresh air for ventilation. The build-up of indoor air pollutants such as CO2, pathogens, and various volatile organic compounds in poorly ventilated room have been shown to be detrimental to both health and well-being its human occupants. This work aims to study the effect of introducing fresh air via a supply vent on the airflow within the room, while keeping track of the corresponding increase of energy consumption in the form of cooling capacity caused by ventilating warm fresh air into the room. To carry out this study, an air change per hour (ACH) of 10 supplied through different vent heights are simulated using a validated computational fluid dynamics model to investigate the behaviour of temperature, airflow, and energy consumption for five different vent-position cases. The simulation simulated case suggests that up to 27.7 % of a 1.0 horsepower (2.67 kW) air conditioner’s cooling capacity may be required to maintain the room at 22 °C with noticeable difference in airflow pattern within the room depending on the vent position. These findings will serve as a guideline for practical applications in designing ventilation systems in a small-to-medium enclosed space.
format	Article
author	Ho, Xinyou Ho, Wai Shin Wong, Keng Yinn Hassim, Mimi Haryani Hashim, Haslenda Ab. Muis, Zarina Yunus, Nor Alafiza Ling, Gabriel Hoh Teck
author_facet	Ho, Xinyou Ho, Wai Shin Wong, Keng Yinn Hassim, Mimi Haryani Hashim, Haslenda Ab. Muis, Zarina Yunus, Nor Alafiza Ling, Gabriel Hoh Teck
author_sort	Ho, Xinyou
title	Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space
title_short	Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space
title_full	Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space
title_fullStr	Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space
title_full_unstemmed	Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space
title_sort	study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space
publisher	Italian Association of Chemical Engineering - AIDIC
publishDate	2021
url	http://eprints.utm.my/id/eprint/94920/ http://dx.doi.org/10.3303/CET2183032
_version_	1732945410231631872
score	13.211869

Study of fresh air supply vent on indoor airflow and energy consumption in an enclosed space

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