Research on effects of reducing temperature and CO2 emissions by green wall: Case study of G city

• Published in: Ecological engineering 2024-11, Vol.208, p.107382, Article 107382
• Main Authors: Im, Jiyeol, Gil, Kyungik
• Format: Article
• Language: English
• Subjects: Climate change; Energy saving; Green wall; Nature based Solutions (NbS); Temperature
• ISSN: 0925-8574
• DOI: 10.1016/j.ecoleng.2024.107382

Climate change is currently the most crucial environmental problem, and policies on responses to climate change are actively being promoted worldwide. Particularly, greenhouse gas emissions in the city have been a continuous reminder of the need to reduce the effects of climate change. There has been interest in reducing greenhouse gas emissions using the green wall. Therefore, this research analyzed the temperature reduction characteristics and performance evaluation of the green wall system based on monitored data. The target area selected was public building. The monitoring point of the wall was the front of the wall with the installation point (glass and behind the green wall), and readings were taken for 10 min. The results of the analysis showed that the surface temperature of the building was affected by the performance of the green wall point during working hours (09:00 to 18:00). Finally, the data and greenhouse gas emissions were analyzed the data and greenhouse gas emissions of 45 to 72 %. •In this research, the effects of the green wall system on the reduction of the temperature of the building surface were analyzed, and performance of the green wall system was evaluated.•Analyzing the change in the temperature of the building's surface over time, the temperature between 12:00 and 17:00 tended to change considerably during the dry period. It was determined that this was affected by sunlight time, and the temperature was lower than that at the point where green wall was applied.•The temperature changes during working hours(09:00–18:00), the performance of the green wall introduction point is distinctly observed. Moreover, in the case of green wall points seems to have the advantage of maintaining the building surface temperature at a stable value.•Cooling energy savings can be expected due to the difference in surface temperature between the green wall installation point and the non-installation point. According to the simulation results of this research, the introduction of the green wall surface will result in a total required power of 104,583 KW/month, CO2 emission reduction of 48.0 tCO2eq/month.•Therefore, the results show that the green wall system can be used as an efficient energy-independence technology for buildings in urban areas. In the future, it is necessary to conduct a long-term data-based performance evaluation through additional research.