應用熱感受累積量建構戶外熱舒適指標檢驗人行道綠化品質之研究

Abstract

臺灣都市化程度於21世紀後不斷提高，都會區擴大造成都市熱島效應加劇，為調節都市微氣候，設置系統性的都市綠園道，成為政府的都市規劃目標，綠園道的選址、降溫效果與使用效率遂成越趨被重視的研究議題。本研究欲探討在台北都會區中，不同季節下綠園道的熱環境變化，以及行人於綠園道中行走時的熱舒適度感受，並研究熱感受累積現象。透過戶外熱環境檢測實驗與動態熱舒適與熱劑量實驗，於國立臺灣大學中，進行舟山路綠廊道的綠化品質診斷。利用戶外熱環境檢測實驗結果，建立行道樹下的日射折減率公式，結合RayMan軟體與台北TMY3氣象資料計算MRT與Top，用以描述舟山路綠廊道的典型熱環境分布，並探討過熱情形。於動態熱舒適與熱劑量實驗中，透過行人的連續熱感受問卷調查，發現於戶外空間行走時有熱感受累積現象，並透過迴歸分析找出熱不滿意度與熱劑量的對應關係。配合舟山路綠廊道上較常被行人行走的路徑，進一步研究行經特定路段時的熱不滿意程度。期望透過此研究結果，了解都市綠園道的綠化品質需求，並能作為未來都市綠園道規劃之參考。

Since 21th century, the increasing urbanization results in urban expansion which may intensify the heat island effect, especially in subtropical Taiwan. To regulate the urban microclimate, constructing systematic urban greenway might be the priority target of urban design for Taiwan government. The research about location, cooling effect, and efficiency of urban greenway is now an important issue. This research aimed to study the variation of thermal environment in different seasons on urban greenway in Taipei and tried to survey the pedestrians’ thermal comfort to research the accumulation of outdoor thermal sensation. This study diagnosed the greening quality of Zhoushan Rd. in NTU by the outdoor thermal environment test experiment and the dynamic thermal comfort and thermal dose experiment. Through the experiment results, we established the radiation reduction formula under the greenway canopy and verified the thermal dissatisfaction caused by accumulative thermal dose. Then, we further predicted the typical thermal environment of Zhoushan Rd. greenway by using RayMan software with TMY3 weather data. We also monitored the overheating hours and thermal dissatisfaction events by modelling the hot sections on Zhoushan Rd. greenway. We expected that we can construct a new method to identify the requirement of urban greenway and to examine the greenway quality. We finally hope this research could be the reference of urban greenway design in future Taiwan.