優等車両における温熱快適性の季節差に関する実験的研究

抄録

The purpose of this study is to clarify the seasonal characteristics of the thermal comfort of occupants in a main line vehicle in Japan. In addition to the summer and winter experiments conducted in our previous research, we carried out the subjective experiments in the autumn and spring. The subjects rode a main line vehicle stationed at a rolling stock center, and they experienced the thermal environment ranging from 20℃ to 30℃ and answered questionnaires about their thermal comfort. Based on the experimental results obtained in the four seasons, the seasonal characteristics of the relationships between the thermal indices called PMV/PPD and the subjective evaluation values were analyzed, and furthermore, the seasonal differences in the prediction accuracy of PPD was examined. The mean thermal sensation has strong correlation with the PMV in all seasons, and the seasonal differences in the relation between them were not found. On the other hand, the seasonal differences were found in the relation between the PMV and the percentage of the subjects who felt dissatisfied and between the PMV and the percentage of the subjects who felt sweaty – in the summer, the percentage of the subjects who felt sweaty and dissatisfied was higher than in the other seasons. The root mean square errors of the PPD in the spring, summer, autumn and winter experiments were 12.9pt, 20.4pt, 17.8pt and 11.0pt, respectively.