| Autor: |
Quarcoo, Mawuena A.1 (AUTHOR), Strickland, Pamela Ohman2 (AUTHOR), Shendell, Derek G.1,3,4 (AUTHOR) shendedg@sph.rutgers.edu |
| Předmět: |
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| Zdroj: |
Atmospheric Environment. Sep2019, Vol. 213, p491-498. 8p. |
| Abstrakt: |
Lawrence Berkeley National Laboratory (LBNL) conducted a nested, case-crossover-design public school-based study in two different climate regions of California in 2000–2003. This included exploring operating profiles of two mechanical ventilation (HVAC) systems (alternated over a period of approximately nine weeks during 2001 Fall school semester) in pairs of classrooms sited adjacent to one another, equipped with either standard or alternate (low-emissivity) interior finish materials. Our retrospective analysis included inferring estimated indoor ozone concentrations. Because ozone can react with certain indoor pollutants to generate secondary organic aerosols, a mass-balanced based indoor/outdoor ratio expression was used to model indoor ozone to subsequently model indoor particles from possible ozone-initiated chemistry. When Indirect-Direct Evaporative Cooling (IDEC) HVAC was running, surface (especially ceiling) reactions dominated ozone loss processes. When standard Bard heat-pump air-conditioning (HPAC) HVAC system was running, damper setting (air excluded from building envelope), ventilation and/or gas phase reactions accounted for most indoor-outdoor ozone differences. Future research should explore outdoor air and surface chemistry contributions to indoor air pollution. • Indoor estimated ozone (O 3) higher in SDB classrooms than SDA classrooms due to higher ambient outdoor O 3. • ΔO 3 % indicated ceiling, human, and carpet surface reactions dominated indoor O 3 losses. • Regarding HVAC systems, IDEC (100% outdoor air (OA)) surface indoor O 3 loss was greater than Bard (25–50% OA). • Surfaces inside school classrooms might also exhibit 'O 3 aging' affecting reactions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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Full Text from ScienceDirect