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Title: “Optimisation of canyon orientation and aspect ratio in warm-humid climate: Case of Rajarhat Newtown, India”
Authors: De B.
Mukherjee, Mahua
Published in: Urban Climate
Abstract: This study investigates the impact of different orientations and canyon aspect ratios to improve street-level microclimate in a warm humid climate. It also contributes to the development of a methodology to develop design guidelines while planning urban neighborhoods. The study was carried out using ENVI_met version 4.0. Simulations were run for typical residential neighborhoods in the Rajarhat Newtown, Kolkata, India, characterized by a warm humid climate as per the National Building Code of India, for a typical summer day with a high level of discomfort. Different orientations and different canyon aspect ratios are simulated and compared to find the most suitable design alternative for the study area. The floor area ratio has been kept constant in order to keep the design alternative more realistic. Performance analysis of the design alternatives was carried out by comparing air temperature, wind speed, MRT and PET. It was found that an orientation angle between 30° and 60° with the wind direction and a Canyon Aspect Ratio of 2.5 can reduce the PET value by 5 to 9 °C throughout most of the study area during a mid-afternoon summer day. Improvement in the thermophysical assessment classes cannot be achieved for the adopted simulation date and time (May 31st, 14:00 h). © 2017 Elsevier B.V.
Citation: Urban Climate(2018), 24(): 887-920
Issue Date: 2018
Publisher: Elsevier B.V.
Keywords: Canyon aspect ratio
Outdoor thermal comfort
Street orientation
Urban geometry
Warm-humid climate
ISSN: 22120955
Author Scopus IDs: 57195775420
Author Affiliations: De, B., Department of Architecture and Planning, Indian Institute of Technology, Roorkee, Uttaranchal PIN-247667, India
Mukherjee, M., Department of Architecture and Planning, Indian Institute of Technology, Roorkee, Uttaranchal PIN-247667, India
Funding Details: This work was a part of an ongoing Doctoral Research at Indian Institute of Technology, Roorkee and supported by the Ministry of Human Resource Development, Government of India .
Corresponding Author: De, B.; Department of Architecture and Planning, Indian Institute of TechnologyIndia; email:
Appears in Collections:Journal Publications [AR]

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