Browsing by Subject "Indoor air quality (IAQ)"

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    Analysing the effects of thermal comfort and indoor air quality in design studios and classrooms on student performance
    (IOP, 2019) Ranjbar, Ali
    This study aimed to explore the various effects of different ventilation modes on the thermal comfort and indoor air quality in design education environment. It also investigated the relationship between the ventilation mode and student performance. Thus, an experimental study was conducted in both studio and classroom environments, in Interior Architecture and Environmental Design Department at Bilkent University, Ankara, Turkey. CO2 concentration values, indoor air temperature and humidity values as the main parameters of thermal comfort and indoor air quality was measured in both winter and summer seasons under the three modes of ventilation: 1) without opening door and windows mode setting; (2) natural ventilation mode and (3) the HVAC ventilation mode achieved by the TROX school-air unit. Under these three different modes for both attention and concentration levels, 100 students from the winter season, 50 students from summer season for the classroom environment, and 20 students from the winter season, 16 students from summer season for the studio environment participated. Results were calculated in IBM SPSS 21 software separately for both seasons and three different ventilation modes. As a result, the experimental and performance results have shown that the HVAC unit mode achieved the most satisfactory indoor environment in both seasons and higher levels of student performance.
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    ItemOpen Access
    Analyzing the effects of thermal comfort and indoor air quality in design studios and classrooms on student performance
    (2017-07) Ranjbar, Ali
    The present study aims to evaluate the effects of the different ventilation modes on thermal comfort and indoor air quality in design studios and classrooms. It also investigates its associations with student performance. For this purpose, experimental and subjective measurements are used in both studio and classroom, in Interior Architecture and Environmental Design Department at Bilkent University, Ankara. CO2 concentration, indoor temperature and humidity values are collected in both winter and summer season under the three modes of ventilation: 1) without opening door and windows mode setting; (2) natural ventilation mode and (3) the mechanical TROX school-air unit mode. The thermal comfort and IAQ was investigated through CO2 concentration and temperature and humidity in these three different ventilation modes. Under these three modes in both seasons, student performance is assessed based on concentration and attention test results. Both experimental and subjective results have shown that the mechanical TROX school-air unit mode is the most satisfactory indoor environment in terms of standards, where the highest grade of students’ concentration and attention are obtained.