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Assessment of indoor air quality and thermal comfort in Portuguese secondary classrooms: Methodology and results

机译：葡萄牙中学教室室内空气质量和热舒适性评估：方法和结果

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摘要

This work shows the results of a field study about indoor thermal comfort, based on investigations in Portuguese secondary schools' classrooms. The surveys herein presented were carried out in a school in Beja, in the South-East of Portugal. The field study was conducted by physical parameters monitoring and survey questionnaires. Both field monitoring and subjective surveys were performed at the same time during the regular class period (either at the end or at the beginning of the class). The measurement campaign consisted in measuring the environmental parameters - air temperature (T_a), air relative humidity (RH), CO_2 concentrations. Outdoor air temperature values were registered hourly at the nearest climatological station. Through these data, along with the actual people clothing and metabolic rate being know, both Fanger's comfort indices were calculated (predicted mean vote and predicted percentage of dissatisfied people). The subjective survey investigated the thermal acceptability, the thermal sensation and the thermal preference. The judgments about the thermal environment were compared with the results of the field measurements. Draught preference votes, air stiffness and global air quality votes were also collected. The results show that the students found temperature range beyond the comfort zone acceptable, and revealed the occupants' accommodation to CO_2 exposure, confirming the results obtained in other studies. Moreover, it was verified that running on naturally ventilation mode, CO_2 concentration limits were highly exceeded.
机译：这项工作基于葡萄牙中学教室的调查，显示了有关室内热舒适性的现场研究结果。本文介绍的调查是在葡萄牙东南部Beja的一所学校进行的。现场研究是通过物理参数监测和调查问卷进行的。在常规课程期间（在课程结束或开始时）同时进行了现场监控和主观调查。测量活动包括测量环境参数-空气温度（T_a），空气相对湿度（RH），CO_2浓度。每小时在最近的气象站记录室外空气温度值。通过这些数据，连同实际的人的衣服和新陈代谢率一起，可以计算出两个Fanger的舒适度指数（预测的平均投票率和预测的不满意人口百分比）。主观调查调查了热可接受性，热感觉和热偏好。将有关热环境的判断与现场测量结果进行了比较。还收集了优先票草案，空气刚度和全球空气质量票。结果表明，学生们发现超出舒适区的温度范围是可以接受的，并且揭示了乘员住所对CO_2的适应性，从而证实了其他研究中获得的结果。此外，已证实以自然通风模式运行时，CO 2浓度极限已大大超出。

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