Quantifying outdoor cooling effects of vertical greening system on mean radiant temperature

Autor: Eun Sub Kim, Seok Hwan Yun, Dong Kun Lee, Na Youn Kim, Zheng Gang Piao, Sang Hyuck Kim, Seunghwan Park
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Developments in the Built Environment, Vol 15, Iss , Pp 100211- (2023)
Druh dokumentu: article
ISSN: 2666-1659
DOI: 10.1016/j.dibe.2023.100211
Popis: Energy flux of Vertical Greening System (VGS) is crucial for understanding of heat exchange processes by optimizing the cooling performance in outdoor thermal comfort, thereby mitigating heat stress through the transpiration. To understand the potential cooling effect of VGS, we quantify the Mean Radiant Temperature (MRT) of VGS by analyzing radiation flux and evaluating cooling efficiency, defined as the ratio of the cooling effect provided by the VGS to the energy input necessary to achieve that effect to quantify the effectiveness of VGS. The VGS showed a decrease in net radiation by 120 W/ m2, resulting in a decline in MRT by 3.02 °C compared to the wall. Furthermore, we found that the cooling efficiency of transpiration in VGS was 7.38 times more effective than evaporation from soil without plants. These findings suggest that VGS has the potential to significantly reduce heat stress and serve as an efficient strategy in urban areas.
Databáze: Directory of Open Access Journals