都市更新是為改善都市環境之重要方法之一，因此，本研究係透過都市更新住宅案例在更新前後與相關環境因子進行分析，藉由CFD(Computational fluid dynamics)模擬方式來釐清都市更新完成後周邊風環境與熱環境之影響狀況。研究結果顯示，住宅都市更新案對於周邊風環境與熱環境之影響，就風環境係屬顯著，而熱環境得視個案而定，同時主要影響區域約略在100~150公尺之範圍內。而模擬結果亦顯示，建築物低樓層的退縮、棟距調整、鋪面材質更改將會影響更新後之風環境與熱環境。 建議未來可將模擬範圍、建築物退縮及棟距距離及地面材質納入都市更新風環境與熱環境之評估準則，以規範明確之環境審議機制，並使規劃評估者有可遵循之依據，亦可確保模擬的可靠度。 / Urban renewal is one of the most important ways to improve the urban environment. Therefore,this study conducted an analysis of environmental factors in residential cases before and after urban renewal and clarified the impact of urban renewal on the wind environment and the thermal environment of the ambient areas using computational fluid dynamics (CFD) simulation. The results of the study showed that the residential cases had a consistently significant impact on the wind environment, while the impact on the thermal environment varied from case to case. The main impacted area fell within a radius of 100~150 m. According to the results of the simulation, the shrink of buildings’ low floors, adjustments to building distance, and changes in paving will impacted the wind environment and the thermal environment following urban renewal. In the future, we recommend that researchers include evaluations of the wind environment and thermal environment of urban renewal in the scope of simulation, shrink of buildings, building distance, and paving in order to clearly determine the mechanisms for environmental review for evaluators’ reference and ensure the reliability of the simulation.

林憲德等人於1999年提出台北夏季午夜之都市熱島強度為4.5℃，至2012年簡子翔等人所提出夏季白天最大熱島強度6.18℃、午夜4.38℃，可以發現台北市的高溫化現象並未有顯著的差異，甚至還新增加了多個新興熱區。 本研究以健康新城為研究對象，以實測方式、CFD電腦模擬方法，釐清社區建築環繞下，社區內的高溫化現象，並與社區外的街道環境比較溫度差異，評估熱舒適性。研究結果顯示，建築環繞下的社區內部(社區中庭)，在日落後的確有高溫化現象，白天時則會因為各社區的遮蔽條件、綠化條件不同，而有不同程度的差別。而模擬結果亦顯示，社區開口條件、通風道配置不同，也會影響社區中庭與外部周邊街道環境之舒適性差異。 建議未來社區的建築規劃設計，除了增加綠化措施之外，尚能適度增加開放空間，增加通風性能；而公部門在訂定法定容積時，應考量都市環境因素(增加遮蔽、通風)，酌以調整已達優良的都市實質環境。 / According to Urban Heat Island’s studies by Lin et al. (1999) and Chien et al. (2012), urban heat island intensity (UHIs) of Taipei didn’t get an obvious improvement from 1999 to 2012. UHIs of Taipei was 4.5℃ in the midnight in 1999, 4.38℃ in the midnight in 2012 and 6.18℃ in the daytimes in 2012. Obviously, there are several high temperature area appeared in the years. This study tries to measure the thermal comfort between the area inside Jian-Kang community and the streets’ environment around Jian-Kang community. Furthermore, this study utilize CFD simulation that can help the study knows the reason effects thermal comfort. As the result of the study, the area inside Jian-Kang community has higher temperature after sunset. In the morning, it will have difference due to the shadow and green situation. Also, the simulation results show that the draft condition of the community will influence the thermal comfort. In the future, this study suggests some strategy to have a better urban environment. First, increase much more greening measures. Second, preserve open spaces to improve the ventilation when deciding the community’s design. Third, consider the urban environmental factors when rule the building’s height.