Paper 1
Particulate Matter Mass
Concentration (PM10) under Different Ventilation Methods in Classrooms
Mohammed Alshitawi, Hazim Awbi and Norhayati Mahyuddin
Indoor Environment and Energy Research Group, School of Construction
Management and Engineering, University of Reading, Reading, UK
Abstract
Recently, studies have shown that the classroom environment is very
important for students' health and performance. Thus, the evaluation of
indoor air quality (IAQ) in a classroom is necessary to ensure students'
well-being. In this paper the emphasis is on airborne concentration of
particulate matter (PM) in adult education rooms. The mass concentration
of PM10 particulates was measured in two classrooms under different
ventilation methods in the University of Reading, UK, during the winter
period of 2008. In another study the measurement of the concentration of
particles was accompanied with measurements of CO2 concentration in these
classrooms but this study is the subject of another publication. The
ambient PM10, temperature, relative humidity, wind speed and direction,
and rainfall events were monitored as well. In general, this study showed
that outdoor particle concentrations and outdoor meteorological parameters
were identified as significant factors influencing indoor particle
concentration levels. Ventilation methods showed significant effects on
air change rate and on indoor/outdoor (I/O) concentration ratios. Higher
levels of indoor particulates were seen during occupancy periods. I/O
ratios were significantly higher when classrooms were occupied than when
they were unoccupied, indicating the effect of both people presence and
outdoor particle concentration levels. The concentrations of PM10 indoors
and outdoors did not meet the requirements of WHO standards for PM10
annual average.
Key words: particulate matter, classrooms, ventilation methods,
outdoor parameters, student activities.
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