This paper investigates the likely route of dispersion of airborne pollutants and pathogenic agents in the re-entrance space of a high-rise residential (HRR) building in Hong Kong. A 1 : 150 scaled HRR building, a 30 storeys tall model was tested in a wind tunnel with simulated atmospheric boundary layer flow. Tracer gas, propane released from the lower, middle and upper parts of the building, was measured by flame ionisation detection and this was used to simulate the air pollutant dispersion within the re-entrance space. There were a total of 495 measurements, tested under five different wind directions at 99 measurement points on windows locations of every floor of the modelled building. The tracer gas concentration profiles obtained would illustrate the pollutant dispersion and transmission routes under the different wind effect. The results showed that the airborne pollutants or pathogenic agents could be dispersed mainly along the vertical routes, posing a potential risk to the adjacent neighbours immediately above the source location. Wind direction could also affect the dispersion. The findings of this study should inform the development of ventilation strategies for HRR buildings and would guide building design to minimise transmission of airborne diseases or harmful pollutants within buildings.
Chang TJ: Numerical evaluation of the effect of traffic pollutant on indoor air quality of a naturally ventilated building: J Air Waste Manag Assoc2002;9:1043-1053.
2.
Yu CWF , Kim JT: Building pathology, investigation of sick buildings - VOC emissions: Indoor Built Environ2010;19(1):30-39.
3.
Coulson G., Bartonova A., Bøhler J., Broday DM, Colbeck I., Fløisand I., Fudala J., Hollandes W., Housiadas C., Lazaridis M., Smolik J.: Exposure risks from pollutants in domestic environments: the urban exposure project: Indoor Built Environ2005 ;14(3-4):209-213.
4.
Gao X., Li Y., Leung GM: Ventilation control of indoor transmission of airborne diseases in an urban community: Indoor Built Environ 2009;18(3):205-218.
5.
Chen X., Zhao B., Li X.: Numerical investigation on the influence of contaminant source location, occupant distribution on emergency ventilation strategy: Indoor Built Environ2005;14(6): 455-467.
6.
Yuguo L., Ching WH, Qian HA, Yuen PL, Seto WH, Kwan JK, Leung JKC, Leung M., Yu C.: An evaluation of the ventilation performance of new SARS isolation wards in nine hospitals in Hong Kong: Indoor Built Environ2007;5: 400-410.
7.
Yip C., Chang WL, Yeung KH, Yu ITS: Possible meteorological influence on the severe acute respiratory syndrome (SARS) community outbreak at Amoy gardens, Hong Kong: J Environ Health2007;3:39-46.
8.
Si YL, Skidmore AK, Wang TJ, de Boer WF, Debba P., Toxopeus AG, Li L., Prins HHT: Spatio-temporal dynamics of global H5N1 outbreaks match bird migration patterns : Geospatial Health2009;1:65-78.
9.
Hui DS, Lee N., Chan PKS: Clinical management of pandemic 2009 influenza A(H1N1) infection : Chest2010;4:916-925.
10.
Chen C., Zhao B.: Some questions on dispersion of human exhaled droplets in ventilation room: answers from numerical investigation: Indoor Air2010;2:95-111.
11.
Liu XP, Niu JL, Perino M., Heiselberg P.: Numerical simulation of inter-flat air cross-contamination under the condition of single-sided natural ventilation: JBPS2008;2:133-47.
12.
Niu JL, Tung TCW: On-site quantification of re-entry ratio of ventilation exhausts in multi-family residential buildings and implications: Indoor Air2008;1:12-26.
13.
Gao NP, Niu JL, Perino M., Heiselberg P.: The airborne transmission of infection between flats in high-rise residential buildings: particle simulation: Build Environ2009;2:402-410.
14.
Liu XP, Niu JL, Kwok KCS, Wang JH, Li BZ: Investigation of indoor air pollutant dispersion and cross-contamination around a typical high-rise residential building: wind tunnel tests: Build Environ2010;8:1769-1778.
15.
Chau OKY , Liu CH, Leung MKH : CFD analysis of the performance of a local exhaust ventilation system in a hospital ward: Indoor Built Environ2006;15(3):257-271.
16.
Sun W., Ji J.: Transport of droplets expelled by coughing in ventilation rooms: Indoor Built Environ2007;16(6):493-504.
17.
Noakes CJ, Sleigh PA, Escombe AR, Beggs CB: Use of CFD analysis in modifying a TB ward in Lima, Peru: Indoor Built Environ2006;15(1):41-47.
18.
Coffey CC, Hudnall JB, Martin SB: Improving the environmental controls at a homeless shelter to assist in reducing the probability of airborne transmission of mycobacterium tuberculosis: a case study: Indoor Built Environ2009;18(2):168-182.
19.
Chou P., Chiang C., Li Y., Lee C., Chang K.: Natural ventilation efficiency in a bedroom with a control pivoting window : Indoor Built Environ2008;17;2:164-172.
20.
To WM, Lau YK, Yeung LL: Emission of carcinogenic components from commercial kitchens in Hong Kong : Indoor Built Environ2007;26(1):29-37.
21.
Calogine D. , Boyer H., Ndoumbe S., Riviere C., Miranville F.: Identification of parameters in building concentration dispersion model: Indoor Built Environ2010;2:250-266.
22.
Li Y., Duan S., Yu ITS, Wong TW: Multi-zone modeling of probable SARS virus transmission by airflow between flats in block E, Amoy gardens: Indoor Air2005;2:96-111.
23.
Tian L., Lin Z., Wang Q., Liu J.: Numerical investigation of indoor aerosol particle dispersion under stratum ventilation and under displacement ventilation: Indoor Built Environ2009;18(4):360-375.
24.
Thornton F. , Shurpali N., Bock B., Reddy K.: N2O and NO emissions from poultry litter and urea applications to Bermuda grass: Atmos Environ1998;9:1623-1630.
25.
Ching WH, Leung MKH, Leung DYC, Li Y., Yuen PL: Reducing risk of airborne transmitted infection in hospitals by use of hospital curtains: Indoor Built Environ2008;3:252-259.
26.
Mollmann-Coers M., Klemp D., Mannschreck K., Slemr F.: Determination of anthropogenic emissions in the Augsburg area by the source-tracer-ratio method: Atmos Environ2002;36:S95-S107.
27.
Chang CH, Meroney RN: Concentration and flow distributions in urban street canyons: wind tunnel and computational data: J Wind Eng Ind Aerod2003;9:1141-1154.
28.
Gomes MS, Isnard AA, Pinto JM: Wind tunnel investigation on the retention of air pollutants in three-dimensional recirculation zones in urban areas: Atmos Environ2007;23:4949-4961.
29.
Ahmad K., Khare M., Chaudhry KK: Wind tunnel simulation studies on dispersion at urban street canyons and intersections: a review: J Wind Eng Ind Aerod2005;9:697-711.
30.
Canepa E., Dallorto L., Ratto CF: About the plume rise description in the dispersion code SAFE AIR : Int J Environ Pollut2000;1-6: 235-245.
31.
Pavageau M. , Schatzmann M.: Wind tunnel measurements of concentration fluctuations in an urban street canyon: Atmos Environ1999;24-25:3961-3971.
32.
Yassin MF, Kato S., Ooka R., Takahashi T., Kouno R.: Field and wind-tunnel study of pollutant dispersion in a built-up area under various meteorological conditions: J Wind Eng Ind Aerod2005;5:361-382.
33.
Kastner-Klein P., Plate E.: Gaseous pollutant dispersion around urban-canopy elements: wind tunnel: Int J Environ Pollut1997;3-6: 727-737.
34.
Macdonald RW , Griffiths RF, Cheah SC: Field experiments of dispersion through regular arrays of cubic structures: Atmos Environ1997;6:783-795.
35.
Mavroidis I. , Griffiths RF, Hall DJ: Field and wind tunnel investigations of plume dispersion around single surface obstacles: Atmos Environ2003;21:2903-2918.
36.
Higson HL, Griffiths RF, Jones CD, Hall DJ: Concentration measurements around an isolated building: a comparison between wind tunnel and field data: Atmos Environ1994;11:1827-1836.
37.
Capentieri M., Cori A., Zipoli L.: Wind tunnel experiments of tracer gas dispersion downwind from a small-scale physical model of a landfill : Environ Modell Softw2004;10:881-885.
38.
Mfula AM, Kukadia V., Griffiths RF, Hall DJ: Wind tunnel modelling of urban building exposure to outdoor pollution : Atmos Environ2005;15:2737-2745.
39.
Sada K.: Wind tunnel experiment of tracer gas diffusion within unstable boundary layer over coastal region: Atmos Environ2002 ;30: 4757-4766.
40.
Santos JM, Reis Jr NC, Goulart EV, Mavroidis I.: Numerical simulation of flow and dispersion around an isolated cubical building: the effect of the atmospheric stratification: Atmos Environ2009;34:5484-5492.
41.
Li Y., Stathopoulos T.: Numerical evaluation of wind-induced dispersion of pollutants around a building : J Wind Eng Ind Aerod1997;67-68: 757-766.
42.
Chow TT, Lin Z., Bai W.: The integrated effect of medical lamp position and diffuser discharge velocity on ultra-clean ventilation performance in an operating theatre: Indoor Built Environ2006;4:315-331.
43.
Ohba M., Irie K., Kurabuchi T.: Study on airflow characteristics inside and outside a cross-ventilation model, and ventilation flow rates using wind tunnel experiments: J Wind Eng Ind Aerod2001;14-15:1513-1524.
44.
Australian Standard: Minimum design loads on structures: AS1170.2-198. 1989.
45.
Baker CJ, Hargreaves DM: Wind tunnel evaluation of a vehicle pollution dispersion model: J Wind Eng Ind Aerod2001;2: 187-200.
46.
Snyder WH: Similarity criteria for the application of fluid models to the study of air pollution meteorology: Bound Layer Meteorol1972;1:113-134.
47.
Hanna SR, Steinberg KW: Overview of petroleum environmental research forum (PERF) dense gas dispersion modeling project: Atmos Environ2001;13:2223-2229.
48.
Meroney RN: Wind tunnel and numerical simulation of pollution dispersion: a hybrid approach : Invited Lecture; Croucher Advanced Study Institute on Wind Tunnel Modelling, Hong Kong University of Science and Technology, 06-10 December, 2004.
49.
Gromke C., Ruck B.: Influence of trees on the dispersion of pollutants in an urban street canyon-experimental investigation of the flow and concentration field: Atmos Environ2007;41:3287-3302.
50.
Riley EC, Murphy G., Riley RL: Airborne spread of measles in a suburban elementary school: Am J Epidemiol1978;107:421-432.
