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The effectiveness of underfloor air distribution (UFAD) system in controlling thermal comfort and indoor air quality

Rhasbudin Shah, Shahreena Melati and Mohd Yusof, Mohd Zainal and Leman, Abd Mutalib and Husain, Adnan The effectiveness of underfloor air distribution (UFAD) system in controlling thermal comfort and indoor air quality. In: National Seminar on Energy in Buildings (NSEB2005), 10-11 May 2005, Subang Jaya, Selangor.

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Abstract

This paper presents the results of evaluation on the effectiveness of underfloor air distribution system in controlling thermal comfort and indoor air quality in an office building. The building chosen was Securities Commission’s building located in Mont Kiara, Damansara. The building was chosen because it is served with underfloor air distribution system for the office spaces air conditioning. Physical measurements were carried out such as air temperature, air velocity and relative humidity. Concentrations of carbon dioxide (CO2), carbon monoxide (CO), nitrogen dioxide (NO2), sulphur dioxide (SO2) and ozone (O3) were also monitored. Ventilation rates were determined in terms of percentage of outside air and air change rate (ACH). All the physical measurements were analysed and compared with ASHRAE Standard 55-92, ASHRAE Standard 62-89 and ISO Standard 7730-84. Selected results were : operative temperature = 21.8oC - 24.3oC, relative humidity = 54.9 % - 69.8 %, air velocity = 0.01 m/s - 0.11 m/s, concentration of CO2 = 487 ppm and ventilation rates = 19% outside air and ACH range between 0.24 and 0.48.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: IAQ; air distribution; ventilation; thermal comfort
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD881-890 Air pollution and its control
T Technology > TH Building construction > TH7005-7699 Heating and ventilation. Air conditioning
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Aeronautical Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 08 Nov 2012 01:33
Last Modified: 08 Nov 2012 01:33
URI: http://eprints.uthm.edu.my/id/eprint/2675
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