A summer field study was conducted in two university dormitories in the Tokai region of Central Japan. The study aimed at understanding the correlation between subjective thermal responses as well as whether nationality was affecting the responses. It was observed that nationality significantly affected thermal sensitivity and preference. The occupants’ acceptance for thermal stress was invariably above 90%. Despite the high levels of humidity observed, the multiple regression model showed that only the indoor air temperature was significant for explaining the variability of thermal sensation for both Japanese and non-Japanese students. The highest probability of voting neutral for university students in dormitory buildings in the Tokai region of Japan was estimated within 24~26.5 °C (by probit analysis). Japanese students were more sensitive to their indoor environment as opposed to the international students. The adjusted linear regression coefficient yielded from the room-wise day-wise averages were 0.48/K and 0.35/K for Japanese sensitivity and international sensitivity, respectively. In our study, the Griffiths’ model of estimating comfort temperature (or thermal neutrality) showed weak predictability and notable differences from the actually voted comfort. The neutral and comfort temperature observed and estimated in the study remained invariably below the recommended temperature threshold for Japan in summer leading to believe that that threshold is worth reevaluating.

中文翻译：

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日本夏季大学生宿舍适应性热舒适度的民族差异实地研究

在日本中部东海地区的两个大学宿舍中进行了夏季实地研究。该研究旨在了解主观热反应之间的相关性，以及国籍是否正在影响热反应。据观察，国籍极大地影响了热敏感性和偏好。乘员对热应力的接受程度始终高于90％。尽管观察到较高的湿度，但多元回归模型显示，只有室内空气温度才足以说明日本和非日本学生的热感变化。在日本东海地区的宿舍楼中，大学生对中学生投票的最高可能性估计为24〜26.5°C（通过概率分析）。与国际留学生相比，日本留学生对自己的室内环境更加敏感。从日间平均水平得出的调整后的线性回归系数对于日本敏感性和国际敏感性分别为0.48 / K和0.35 / K。在我们的研究中，格里菲斯（Griffiths）估算舒适温度（或热中性）的模型显示出较弱的可预测性，并且与实际投票的舒适度存在显着差异。在研究中观察到和估计的中性和舒适温度始终保持在夏季日本建议的温度阈值以下，因此认为该阈值值得重新评估。日本敏感度和国际敏感度分别为35 / K。在我们的研究中，格里菲斯（Griffiths）估算舒适温度（或热中性）的模型显示出较弱的可预测性，并且与实际投票的舒适度存在显着差异。在研究中观察到和估计的中性和舒适温度始终保持在夏季日本建议的温度阈值以下，因此认为该阈值值得重新评估。日本敏感度和国际敏感度分别为35 / K。在我们的研究中，格里菲斯（Griffiths）估算舒适温度（或热中性）的模型显示出较弱的可预测性，并且与实际投票的舒适度存在显着差异。在研究中观察到和估计的中性和舒适温度始终保持在夏季日本建议的温度阈值以下，因此认为该阈值值得重新评估。