Variations in particle concentrations and indoor air parameters in classrooms in the heating and summer seasons

• Autorzy: Połednik B.

Identyfikatory

DOI

10.2478/aep-2013-0037

Warianty tytułu

PL

Zmiany koncentracji cząstek i parametrów powietrza wewnętrznego w klasach w sezonie grzewczym i letnim

• Języki publikacji: EN

Abstrakty

EN

Simultaneous measurements of the indoor and outdoor particle mass (PM) and particle number (PN) concentrations as well as the air temperature, relative humidity (RH), and CO₂ concentrations have been conducted in 6 occupied (L) and unoccupied (V) classrooms in 3 secondary schools in Lublin, Poland, in the heating (H) and summer (S) seasons. The schools were located in residential areas where the majority of private houses are heated by means of coal-burning stoves. The ratios of the average particle concentrations in occupied and unoccupied classrooms (L/V) were higher during the heating season measurements. The ratios of the average particle concentrations during the measurements in the heating and summer seasons (H/S) were higher in occupied classrooms. In both seasons the average PM and PN concentrations amounted to 239 μg/m³ and 7.4×10³/cm³in the occupied classrooms, and to 76 μg/m³ and 5.4×10³cm³ in the unoccupied classrooms, respectively. The particle exposures experienced by students were higher in the monitored classrooms than outdoors and were on average about 50% higher in the heating than in the summer season. A positive correlation between mass concentrations of coarse particles and indoor air temperature, RH and CO₂ concentrations in both seasons was observed. The concentrations of fine particles were negatively correlated with the indoor air parameters in the heating season, and positively correlated in the summer season.

PL

Pomiary masowych (PM) i ilościowych (PN) koncentracji cząstek, jak również temperatury, wilgotności względnej (RH) i stężenia CO₂ przeprowadzono w 3 gimnazjalnych szkołach w Lublinie w sezonie grzewczym (H) i letnim (S). Szkoły były zlokalizowane w dzielnicach, w których większość prywatnych domów ogrzewana jest piecami węglowymi. W każdej ze szkół wybrano 2 klasy, w których wykonano pomiary przy obecności (L) i nieobecności (V) uczniów. Równoległe pomiary przeprowadzono dla powietrza zewnętrznego. Stosunki średnich koncentracji cząstek w klasach z uczniami i bez uczniów (L/V) były większe w sezonie grzewczym. Stosunki średnich koncentracji cząstek podczas pomiarów w sezonie grzewczym i letnim (H/S) były większe w klasach z uczniami. W obydwu sezonach średnie koncentracje PM i PN w klasach z uczniami wynosiły odpowiednio 239 μg/m³ i 7,4×10³/cm³, a w klasach bez uczniów 76 μg/m³ i 5,4×10³cm³. Ekspozycje uczniów w klasach były wyższe niż na zewnątrz i były średnio o ok. 50% większe w sezonie grzewczym. W obydwu sezonach zaobserwowano dodatnią korelację pomiędzy masową koncentracją grubych cząstek a temperaturą, RH i stężeniem CO₂ w powietrzu wewnętrznym. Koncentracje drobnych cząstek były ujemnie skorelowane z parametrami powietrza wewnętrznego w sezonie grzewczym i dodatnio w sezonie letnim.

Słowa kluczowe

EN

classroom; particle mass concentration; particle number concentration; student exposure; indoor air parameters

PL

klasa; koncentracja cząstek; masowa koncentracja cząstek; ilościowa koncentracja cząstek; ekspozycja uczniów; parametry powietrza wewnętrznego

• Wydawca: Institute of Environmental Engineering, Polish Academy of Sciences
• Czasopismo: Archives of Environmental Protection
• Rocznik: 2013
• Tom: Vol. 39, no. 4
• Strony: 15--28
• Opis fizyczny: Bibliogr. 34 poz., tab., wykr.

Twórcy

autor

Połednik B.

• Faculty of Environmental Engineering, Lublin University of Technology ul. Nadbystrzycka 40B, 20-618 Lublin, Poland

Bibliografia

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