Study on performance of energy-efficient retrofitting measures on commercial building external walls in cooling-dominant cities

Effect of facade components on energy efficiency in office buildings

“…As an example of using the facade properties, the reflectance of roofs has been specifically aimed at reducing the cooling energy requirements by minimizing the solar energy gain in the relatively warm and hot regions of the US [8][9][10][11]. Facades with a relatively high reflectance of a room composed of specific components have also been discussed in not only hot and warm regions such as Hong Kong and China but also cold regions such as Sweden [12][13][14][15]. The emphasis on reflectance has been prompted by the development of highly reflective materials [16][17][18][19][20] that are capable of reflecting greater amounts of near infrared (NIR) solar radiation without the need to change the surface color.…”

Sealant aging and its correlation with facade reflectance

“…Walls with highly reflective materials have, however, not been thoroughly studied. Previous studies mainly focused on their energy-saving benefit [9,10] and experimentally demonstrated the aged reflectance that resulted from several years of exposure [11][12][13]. Field collection of data on aged reflectance has also been undertaken (e.g., [14]).…”

Advanced Strategies for Net-Zero Energy Building: Focused on the Early Phase and Usage Phase of a Building’s Life Cycle

“…It is difficult, however, for non-experts like the construction manager (CMr) and designers to perform energy simulation tools or complex calculations. Finally, most of the previous relevant studies were conducted by considering only one aspect of building energy demand and supply, and as such, there are restrictions to deriving an optimal solution that considers both building energy demand and supply in terms of implementing nZEB [78,[147][148][149][150][151][152]. Therefore, this study proposes an optimization model that could overcome the limitations of the previous relevant studies from the viewpoint of nZEB implementation through the following two stages: step 1: development of an integrated analysis model for estimating the building energy demand and supply; and step 2: development of an integrated multi-objective optimization model for determining the optimal design the solution for the realization of nZEB.…”