Outdoor thermal comfort and summer PET range: A field study in tropical city Dhaka

Date

2019-05-31

Advisors

Journal Title

Journal ISSN

ISSN

0378-7788

Volume Title

Publisher

Elsevier

Type

Article

Peer reviewed

Yes

Abstract

Urban microclimate has important consequences on the thermal sensation of pedestrians. However, the extent of this effect may vary as other parameters such as respondents’ personal factors, psychological and behavioural aspects and cultural backgrounds may be involved. This heightens the need for subjective assessment and on-site questionnaire surveys alongside objective field measurements to understand outdoor comfort conditions which is essential for creating sustainable urban spaces. In this study thermal comfort conditions outdoors are examined through field surveys in the high-density, tropical city Dhaka, where extensive microclimatic monitoring has been carried out in parallel to subjective responses of the pedestrians. Microclimatic conditions, which are affected by the urban geometry, are found to be statistically correlated with thermal sensation votes (TSV), with air temperature, globe temperature and mean radiant temperature being the most important parameters (correlation coefficients of r = 0.47, 0.45 and 0.44 respectively). The study also reports the effect of urban geometry parameters on microclimatic conditions, identifying strong correlations with globe temperature (r =-0.50), mean radiant temperature (r =-0.48) and wind speed (r =0.72). Furthermore, the study proposes acceptable ranges (upper limits) for PET for the tropical climate of Dhaka with a ‘Neutral’ range between 29.50 – 32.5°C confirming that people in outdoor conditions will feel comfortable at a higher PET range.

Description

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.

Keywords

Outdoor thermal comfort, Thermal Sensation Vote (TSV), PET analysis, Tropical climate

Citation

Sharmin, T., Koen S. and Humphreys, M. (2019) Outdoor thermal comfort and summer PET range: A field study in tropical city Dhaka. Energy & Buildings, 198, pp. 149-159

Rights

Research Institute

Institute of Architecture