A study of the characteristic of indoor air quality in the multi-purpose premises

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A study of the characteristic of indoor air quality in the multi-purpose premises


Author: Lai, Kim-hung Lotto
Title: A study of the characteristic of indoor air quality in the multi-purpose premises
Degree: M.Sc.
Year: 2001
Subject: Indoor air pollution
Industrial buildings
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Civil and Structural Engineering
Pages: xi, 111 leaves : ill. ; 30 cm
Language: English
OneSearch: https://www.lib.polyu.edu.hk/bib/b1597809
URI: http://theses.lib.polyu.edu.hk/handle/200/4414
Abstract: The indoor air quality (IAQ) was studied on a 14-storey high industrial building, which was provided as partial plus central air-conditioning, from 1998 to 2000 in Fo Tan. Fourteen sites as rooftop, corridor and working area are included for sampling. The indoor air quality parameters studied include TBC, CO2, CO, Temp and RH, as well as, PM10. Two more locations were selected to study IAQ in Fanling and Kowloon Tong for comparison in 2001. Total bacteria counts (TBC) for most of the locations were found to be higher than 1000 CFU/m3 in 1998 and the size distribution study indicated that the microbes deposited most on stage 4 and 5 in the range of 2.1um to 3.3 um and 1.1 um to 2.1 um, respectively. After the implement of mitigation measures, almost all location's TBC were below 1000 CFU/m3, except Ml. For CO2, most locations were below l000ppm, except 03, Ml & M2 in 13/F. No CO level was detected in all locations in 2000, except the combustion area. All PM10 level were controlled below l80ug/m3 except Tl, Ml &M2. TBC was found directly proportion to temperature; CO2 and PM10 were invert proportion to RH. The similar pattern of PM10 daily profile was found in two location group as (Cl, O3, Ml & M2) and (O1, O2, C2 and Tl). For CO2, there are also distinct two location group as (Ml & M2) and (O1, Cl, C2 & Tl). Indoor airborne microbe was found slightly positive proportion to Sick Leave (SL) Index with r2 = 0.44. The trend study of sick leave was found to be decreasing, indicated that the mitigation measures was efficiency and effective. The evidence of improvement can be observed on two case studies in Meeting Room (MRl) and Combustion Area (CAl) for CO2 and CD, respectively. Finally, all locations on 14/F and 13/F are classified as Level 2 and Level 3 (or not classified in coming revised HKIAQO) based on Recommended HKIAQO. The effective and efficiency of physical and administrative mitigation measures for IAQ and productivity improvement have been verified again. For comparison studies of different office in different locations were studied and concluded that IAQ is depended on local activities rather than site-specific.

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