Abstract
The thermal benefits of Vertical Greenery System (VGS) in providing thermal comfort, reducing internal building temperature, and lowering operational energy consumption are not widely known. There is a lack of research and technical knowledge on the effects of vertical greenery systems related to thermal performance, especially in tropical climates, such as that of Malaysia. Therefore, this paper addresses this gap by investigating the effect of VGS on heat transfer and the thermal performance of hypothetical buildings. In this paper, a data prediction method is used to identify the overall thermal transfer value (OTTV) from several hypothetical case studies. A variety of combinations of variables have been used to identify the best design with the lowest OTTV reduction through VGS. From the calculation, Linear Greenery System achieved the highest OTTV reduction with an average of 6.87%, followed by Modular Green Wall (6.82%), Double-skin Green Facades (2.97%), and Direct Green Facades (1.32%). Therefore, this paper can conclude that Linear Green Wall is the best greenery system for reducing heat transfer for the tropical climate of Malaysia.
Highlights
The 21st century has seen the rise of environmental awareness and increased the integration of sustainability concepts and green design in the built environment industry [1]
Brick wall and concrete wall were selected for modelling as it is the most commonly used building construction in tropical climates, such as Malaysia
The overall thermal transfer value (OTTV) differences made to buildings by applying vertical greenery systems (VGS) on the building façade are investigated through the calculation of OTTV values
Summary
The 21st century has seen the rise of environmental awareness and increased the integration of sustainability concepts and green design in the built environment industry [1]. Urban UHI can be mitigated by creating more greenery systems in urban spaces integrated with buildings [4] as vegetation can provide shading, reduced urban temperatures, increase carbon sequestration potential, and provides oxygenated air and a healthier environment to urban dwellers (within proximity) [6]. These green spaces act as a shading layer to reduce heat transmission and the temperature of the surrounding environment [5]. VGS is part of a strategy that can reduce the urban heat island effect and operational energy in buildings
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