Differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systems
Exhaled contaminants transported in the air can result in the transmission of many airborne infectious diseases in indoor environments. When the exhaled air from the infected person directly enters the breathing zone of another person, direct exposure occurs. When the exhaled contaminants disperse i...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2019-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/37/e3sconf_clima2019_04034.pdf |
| _version_ | 1818418123634638848 |
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| author | Chen Chun You Ruoyu |
| author_facet | Chen Chun You Ruoyu |
| author_sort | Chen Chun |
| collection | DOAJ |
| description | Exhaled contaminants transported in the air can result in the transmission of many airborne infectious diseases in indoor environments. When the exhaled air from the infected person directly enters the breathing zone of another person, direct exposure occurs. When the exhaled contaminants disperse in the room and then are inhaled by another person, indirect exposure occurs. This investigation developed a method for differentiating the direct and indirect exposure to exhaled contaminants in indoor environments with mechanical ventilation. A literature review was conducted to collect experimental data for 191 person-to-person contaminant transport cases. With the analysis of the database, a mathematical method was developed to differentiate direct and indirect exposure in rooms with mixing and displacement ventilation systems. The proposed method correctly differentiated direct and indirect exposure for 120 out of the 133 mixing ventilation cases and 47 out of the 58 displacement ventilation cases. It can be used at the early design stage to quickly assess whether there will be direct exposure to exhaled contaminants in a room with mechanical ventilation systems. |
| first_indexed | 2024-12-14T12:17:40Z |
| format | Article |
| id | doaj.art-92cd754ce25d4252bb10d760101a1c0c |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-14T12:17:40Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-92cd754ce25d4252bb10d760101a1c0c2022-12-21T23:01:36ZengEDP SciencesE3S Web of Conferences2267-12422019-01-011110403410.1051/e3sconf/201911104034e3sconf_clima2019_04034Differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systemsChen ChunYou Ruoyu0Department of Building Services Engineering, The Hong Kong Polytechnic University, KowloonExhaled contaminants transported in the air can result in the transmission of many airborne infectious diseases in indoor environments. When the exhaled air from the infected person directly enters the breathing zone of another person, direct exposure occurs. When the exhaled contaminants disperse in the room and then are inhaled by another person, indirect exposure occurs. This investigation developed a method for differentiating the direct and indirect exposure to exhaled contaminants in indoor environments with mechanical ventilation. A literature review was conducted to collect experimental data for 191 person-to-person contaminant transport cases. With the analysis of the database, a mathematical method was developed to differentiate direct and indirect exposure in rooms with mixing and displacement ventilation systems. The proposed method correctly differentiated direct and indirect exposure for 120 out of the 133 mixing ventilation cases and 47 out of the 58 displacement ventilation cases. It can be used at the early design stage to quickly assess whether there will be direct exposure to exhaled contaminants in a room with mechanical ventilation systems.https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/37/e3sconf_clima2019_04034.pdf |
| spellingShingle | Chen Chun You Ruoyu Differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systems E3S Web of Conferences |
| title | Differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systems |
| title_full | Differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systems |
| title_fullStr | Differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systems |
| title_full_unstemmed | Differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systems |
| title_short | Differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systems |
| title_sort | differentiating between direct and indirect exposure to exhaled particles in indoor environments with mechanical ventilation systems |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/37/e3sconf_clima2019_04034.pdf |
| work_keys_str_mv | AT chenchun differentiatingbetweendirectandindirectexposuretoexhaledparticlesinindoorenvironmentswithmechanicalventilationsystems AT youruoyu differentiatingbetweendirectandindirectexposuretoexhaledparticlesinindoorenvironmentswithmechanicalventilationsystems |