日本語フィールド
著者：アニーシャ・ヌーリ・カコン、三島伸雄、小島昌一、田口陽子 読み: アニーシャ・ヌーリ・カコン、ミシマノブオ、コジマショウイチ、タグチヨウコ題名：ASSESSMENT OF THERMAL COMFORT IN RESPECT TO BUILDING HEIGHT IN A HIGH-DENSITY CITY IN THE TROPICS: A STUDY IN DHAKA, BANGLADESH発表情報：Proceedings 1st International Conference on Sustainable Architecture and Urban Design ページ: 1-10キーワード：tropical city, building height, thermal comfort, temperature humidity index概要：Problem statement: The significance of urban design and planning in the tropics lies mostly on its climatic and regional concerns. Among many design parameters, building height is an important parameter which affects thermal climate in the city considerably. This paper investigates the effect of building height on outdoor thermal comfort during the daytime in summer in Dhaka, Bangladesh which is a high density city located in tropical climate zone. This study emphasizes on pedestrian comfort condition in a planned residential area in the city.
Approach: Thermal comfort is assessed in terms of Temperature-Humidity-Index (THI) which uses air temperature (Ta) and relative humidity (RH). Measurements were carried out in a typical summer day. In addition, to simulate the urban thermal climate, a 3D numerical simulation tool ENVI-met is used.
Results: Simulated results show close agreement with the measured data in case of existing canyon and thus the validity of the present numerical simulation was confirmed. Results showed that in case of existing canyon with average building height of 4-5 storied, THI lies in the discomfort level. A canyon is proposed by increasing the building height to 8-10 storied in the existing canyon. In case of proposed canyon, it is found that increased building height provides comparatively comfortable condition than the existing case during day time. Moreover, mean radiant temperature (Tmrt), surface temperature (Ts) and wind speed are included in the present study to identify the effects of building height on these factors.
Conclusion: The present study has an implication on the urban design process to achieve a more comfortable urban environment by mitigating heat stress in summer.抄録：Problem statement: The significance of urban design and planning in the tropics lies mostly on its climatic and regional concerns. Among many design parameters, building height is an important parameter which affects thermal climate in the city considerably. This paper investigates the effect of building height on outdoor thermal comfort during the daytime in summer in Dhaka, Bangladesh which is a high density city located in tropical climate zone. This study emphasizes on pedestrian comfort condition in a planned residential area in the city.
Approach: Thermal comfort is assessed in terms of Temperature-Humidity-Index (THI) which uses air temperature (Ta) and relative humidity (RH). Measurements were carried out in a typical summer day. In addition, to simulate the urban thermal climate, a 3D numerical simulation tool ENVI-met is used.
Results: Simulated results show close agreement with the measured data in case of existing canyon and thus the validity of the present numerical simulation was confirmed. Results showed that in case of existing canyon with average building height of 4-5 storied, THI lies in the discomfort level. A canyon is proposed by increasing the building height to 8-10 storied in the existing canyon. In case of proposed canyon, it is found that increased building height provides comparatively comfortable condition than the existing case during day time. Moreover, mean radiant temperature (Tmrt), surface temperature (Ts) and wind speed are included in the present study to identify the effects of building height on these factors.
Conclusion: The present study has an implication on the urban design process to achieve a more comfortable urban environment by mitigating heat stress in summer.英語フィールド
Author：Anisha Noori Kakon, Nobuo Mishima, Shoichi Kojima, Yoko TaguchiTitle：ASSESSMENT OF THERMAL COMFORT IN RESPECT TO BUILDING HEIGHT IN A HIGH-DENSITY CITY IN THE TROPICS: A STUDY IN DHAKA, BANGLADESHAnnouncement information:Proceedings 1st International Conference on Sustainable Architecture and Urban Design Page: 1-10Keyword：tropical city, building height, thermal comfort, temperature humidity indexAn abstract：Problem statement: The significance of urban design and planning in the tropics lies mostly on its climatic and regional concerns. Among many design parameters, building height is an important parameter which affects thermal climate in the city considerably. This paper investigates the effect of building height on outdoor thermal comfort during the daytime in summer in Dhaka, Bangladesh which is a high density city located in tropical climate zone. This study emphasizes on pedestrian comfort condition in a planned residential area in the city.
Approach: Thermal comfort is assessed in terms of Temperature-Humidity-Index (THI) which uses air temperature (Ta) and relative humidity (RH). Measurements were carried out in a typical summer day. In addition, to simulate the urban thermal climate, a 3D numerical simulation tool ENVI-met is used.
Results: Simulated results show close agreement with the measured data in case of existing canyon and thus the validity of the present numerical simulation was confirmed. Results showed that in case of existing canyon with average building height of 4-5 storied, THI lies in the discomfort level. A canyon is proposed by increasing the building height to 8-10 storied in the existing canyon. In case of proposed canyon, it is found that increased building height provides comparatively comfortable condition than the existing case during day time. Moreover, mean radiant temperature (Tmrt), surface temperature (Ts) and wind speed are included in the present study to identify the effects of building height on these factors.
Conclusion: The present study has an implication on the urban design process to achieve a more comfortable urban environment by mitigating heat stress in summer.An abstract：Problem statement: The significance of urban design and planning in the tropics lies mostly on its climatic and regional concerns. Among many design parameters, building height is an important parameter which affects thermal climate in the city considerably. This paper investigates the effect of building height on outdoor thermal comfort during the daytime in summer in Dhaka, Bangladesh which is a high density city located in tropical climate zone. This study emphasizes on pedestrian comfort condition in a planned residential area in the city.
Approach: Thermal comfort is assessed in terms of Temperature-Humidity-Index (THI) which uses air temperature (Ta) and relative humidity (RH). Measurements were carried out in a typical summer day. In addition, to simulate the urban thermal climate, a 3D numerical simulation tool ENVI-met is used.
Results: Simulated results show close agreement with the measured data in case of existing canyon and thus the validity of the present numerical simulation was confirmed. Results showed that in case of existing canyon with average building height of 4-5 storied, THI lies in the discomfort level. A canyon is proposed by increasing the building height to 8-10 storied in the existing canyon. In case of proposed canyon, it is found that increased building height provides comparatively comfortable condition than the existing case during day time. Moreover, mean radiant temperature (Tmrt), surface temperature (Ts) and wind speed are included in the present study to identify the effects of building height on these factors.
Conclusion: The present study has an implication on the urban design process to achieve a more comfortable urban environment by mitigating heat stress in summer.