打印

作者

Sumavalee Chindapol

来源

JOURNAL OF ARCHITECTURAL AND PLANNING RESEARCH,

语言

英文

关键字

Indoor environmental quality, Carbon dioxide, C

作者单位

Faculty of Architecture, Chiang Mai University

摘要

This study investigates indoor environmental quality of a 100-seat classroom at the faculty of Architecture, Chiang Mai University. The physical environment data collected every 10 minutes for a year are carbon dioxide level, indoor temperature, and relative humidity. The data then are analyzed with thermal comfort status, behaviour responses of the occupants and the ASHRAE 62.1 standard and the Engineering Institute of Thailand for a classroom. The results show that there is no installation of any fresh air intake system such as mechanical fans or exhausting system from the air-conditioner. Consequence, air change rates of a measured classroom inadequate and the CO2 cumulative level has become risky to health. The peak CO2 level is almost 5,000 ppm at 4.30 pm in the 4-class-continuous day, meaning totally cumulative 7 hours. This high CO2 level could possibly result in dizziness, fatigue, sleepiness and unconsciousness. Thermal comfort status in the classroom was ‘warm’ and ‘slightly warm’, even though the air-conditioners were turned on during the classes. The recommendation to improve IEQ is to increase ventilation rate by installing at least 12 fans with 300 m/s velocity performance and the fans should be turned on continually more than 10 minutes in every hour.