Abstract
In Taiwan, the daytime temperature usually exceeds 37 °C in summer, and the increase in air-conditioning usage has led to higher energy demand, which brings a heavy burden to power plants. The Kaohsiung House Project, undertaken by the city government, encourages the installation of greening facilities in buildings, such as photovoltaic (PV) panels on rooftops and vertical gardens on balconies, in order to preserve energy and reduce carbon emissions. In the present study, the urban heat island effect and temperature distribution within the city was examined through the establishment of 16 temperature measurement sites within a 7.5 km × 6 km area. A between-site temperature difference of 2 °C was observed between April and August. Areas with higher temperature are recommended to increase their green space ratio through the project. Moreover, relocating PV panels in low-temperature areas increased the overall generation efficiency by 0.8%. Through the analysis of the measured data, this study determined which areas were more appropriate for green space expansion, and which would best serve for green energy generation, all with the aim of improving external environmental comfort and maximizing carbon reduction. Recommendations regarding the implementation of subsequent policies were issued and they provide reference for implementation in other cities.
Highlights
Published: 19 January 2021The Taiwan Green House Reduction and Management Act, which was passed in 2015, stipulates that, by 2050, national greenhouse gas emissions will have decreased to 50% of those in 2005
With the rapid progression of urbanization, urban heat island effect has been observed in multiple cities
Ordinary Kriging yielded the smallest margin of error [31]. These results suggest that Kriging is the optimal interpolation method for analyzing data that were collected from multiple measurement sites
Summary
Published: 19 January 2021The Taiwan Green House Reduction and Management Act, which was passed in 2015, stipulates that, by 2050, national greenhouse gas emissions will have decreased to 50% of those in 2005. With the rapid progression of urbanization, urban heat island effect has been observed in multiple cities. High building density, and busy traffic in these cities inevitably lead to the excessive accumulation and poor dissipation of heat, directly affecting the quality of life. The urban heat island effect increases air conditioning usage in summer, which leads to continual increases in urban energy demand and consumption [1]. Various research has proposed, mitigating the urban heat island effect by different approaches [2,3] and reducing energy consumption through the retention or creation of sufficient green space and areas of vegetation [4,5,6,7,8,9]
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