Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/223561
Title: THERMAL COMFORT EVALUATION OF ROOFTOP GARDENS WITH VARYING GREEN PLOT RATIO
Authors: ANG YVONNE
Keywords: Building
Project and Facilities Management
Wong Nyuk Hien
2010/2011 PFM
Green plot ratio
Thermal comfort
Issue Date: 19-May-2011
Citation: ANG YVONNE (2011-05-19). THERMAL COMFORT EVALUATION OF ROOFTOP GARDENS WITH VARYING GREEN PLOT RATIO. ScholarBank@NUS Repository.
Abstract: Three rooftop gardens of different Green Plot Ratios (GPR) were selected in the residential areas of Singapore to evaluate their thermal conditions as well as the users’ thermal sensations when at these rooftop gardens. After the selection of rooftop gardens, their GPR was computed and found to be 3, 4 and 12. Thermal comfort field measurements were then conducted at the sites on three different days. These measurements, consisting of objective and subjective measurements, were carried out concurrently in order to capture the actual thermal comfort level of the users. Analysis of the respondents’ votes on both the ASHRAE and Bedford scale revealed that Site C performed the worst among the three sites. This is consistent with the fact that Site C has the lowest GPR among the three sites. Site C also has the lowest percentage of respondents who voted the environment as acceptable. However, it was found that even though Sites A (GPR = 4) and B (GPR = 12) have a substantial difference in their GPR, they had similar percentages of respondents voting in the central region of the ASHRAE and Bedford scales and those who voted the conditions of the sites as acceptable. Thermal neutrality of the users was also examined by applying linear regression analysis between the actual thermal sensation votes ( ASHRAE scale) and operative temperatures. Results suggest that people have adapted to the hot weather conditions in Singapore. In this study, it was also found that the PMV model is not applicable to the tropical outdoor conditions. As the data for this study was collected in a span of only three days, it was noted that the results may not be complete.
URI: https://scholarbank.nus.edu.sg/handle/10635/223561
Appears in Collections:Bachelor's Theses

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