Chiu Chun-Fu, Chen Ming-Hung, Chang Feng-Hsiang
Department of Tourism Affairs, Tzu Hui Institute of Technology, Pingtung, Taiwan (R.O.C.); Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung, Taiwan (R.O.C.).
Department of Recreational Sport and Health Promotion, National Pingtung University of Science and Technology, Pingtung, Taiwan (R.O.C.).
PLoS One. 2015 Apr 29;10(4):e0125117. doi: 10.1371/journal.pone.0125117. eCollection 2015.
This study monitored the carbon dioxide (CO2) concentrations and temperatures of three 43-seat tour buses with high-passenger capacities in a course of a three-day, two-night school excursion. Results showed that both driver zones and passenger zones of the tour buses achieved maximum CO2 concentrations of more than 3000 ppm, and maximum daily average concentrations of 2510.6 and 2646.9 ppm, respectively. The findings confirmed that the CO2 concentrations detected in the tour buses exceeded the indoor air quality standard of Taiwan Environmental Protection Administration (8 hr-CO2: 1000 ppm) and the air quality guideline of Hong Kong Environmental Protection Department (1 hr-CO2: 2500 ppm for Level 1 for buses). Observations also showed that high-capacity tour bus cabins with air conditioning system operating in recirculation mode are severely lacking in air exchange rate, which may negatively impact transportation safety. Moreover, the passenger zones were able to maintain a temperature of between 20 and 25°C during travel, which effectively suppresses the dispersion of volatile organic compounds. Finally, the authors suggest that in the journey, increasing the ventilation frequency of tour bus cabin, which is very beneficial to maintain the travel safety and enhance the quality of travel.
本研究在一次为期三天两夜的学校短途旅行中，对三辆43座高载客量旅游巴士的二氧化碳（CO₂）浓度和温度进行了监测。结果显示，旅游巴士的驾驶区和乘客区的二氧化碳浓度均达到了最高值，超过3000 ppm，每日平均最高浓度分别为2510.6 ppm和2646.9 ppm。研究结果证实，旅游巴士内检测到的二氧化碳浓度超过了台湾环境保护署的室内空气质量标准（8小时二氧化碳：1000 ppm）以及香港环境保护署的空气质量指引（1小时二氧化碳：巴士一级为2500 ppm）。观察还表明，配备空调系统且以循环模式运行的高载客量旅游巴士车厢的空气交换率严重不足，这可能对交通安全产生负面影响。此外，乘客区在行驶过程中能够保持20至25°C的温度，这有效地抑制了挥发性有机化合物的扩散。最后，作者建议在行程中增加旅游巴士车厢的通风频率，这对保持旅行安全和提高旅行质量非常有益。
