大學校園戶外環境熱舒適性之實測調查研究

A Field Study of Thermal Comfort for the Campus Outdoor Environment

針對大學校園進行戶外全遮蔭、無遮蔭的熱環境監測，並以主觀問卷資料和客觀實地量測同步進行戶外熱環境調查，於戶外環境使用者888 份問卷中的直接感受，發現植栽對於戶外環境之重要性。藉由機率迴歸方式分析獲得，中性溫度全遮蔭24.5 ℃（SET*） 、無遮蔭22.6 ℃（SET*） 。從溫度的接受上界來審視，則可發現有、無樹蔭相差了1.6 ℃，顯見民眾對於輻射熱有明顯負面的感受，也可以了解到有樹蔭的戶外空間將能提供更寬廣的戶外氣候條件範圍，提升戶外環境使用上的熱舒適性。

This study assessed outdoor thermal environments with and without leafy shade on university campuses of. Subjective opinions of interviewees were obtained via a questioner survey, while objective climatic factors were measured in field monitoring. A total of 888 valid questionnaires were collected. The importance of plants to outdoor thermal environment was highlighted by the reports of thermal sensations from users of outdoor facilities. The analysis results from probability regression indicated that neutral temperatures are 24.5o C (SET*) in sites with leafy shade and 22.6 o C (SET*) in sites without plant shading. The upper limit of acceptable temperature in non-shady sites was 1.6 o C lower than that of shaded sites. Radiant heat imposes negative sensations on subjects in the subtropical zone. Understandably, plant shade widens the thermal comfort zone of outdoor spaces, and thus enhances utilization by local residents.