Investigating the thermal performance of green wall: Experimental analysis, deep learning model, and simulation studies in a humid climate

Daemei, Abdollah Baghaei; Shafiee, Elham; Chitgar, Amir Arash; Asadi, Somayeh

doi:10.1016/j.buildenv.2021.108201

Cited by 23 publications

(10 citation statements)

References 75 publications

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“…The differences between both approaches suggest that shading and evaporation, which both only exist when solar irradiation is present, have a more significant role in determining the environmental impact of vertical greening than the insulation impact of the vegetation layer on the wall. Several in situ studies illustrate that vertical greening can reduce the maximum surface temperature significantly, by up to 28 • C [20], relative to the bare wall, while the insulation capacity of vertical greening can increase the maximum surface temperature by up to 2 • C in the laboratory studies of this paper. The latter is supported by an in situ study examining the impact of vertical greening on a façade receiving almost no solar irradiation.…”

Section: Comparison To Case Study Approachesmentioning

confidence: 60%

“…This experimental laboratory study provides contradictory results compared with results from case studies or simulations. Several studies [11,[18][19][20][21][22], either case studies or simulations, show that vertical greening reduces the amplitude of the surface temperature and the relative humidity fluctuations, reduces the average surface temperature, and increases the average relative humidity of a wall surface. Meanwhile, the experimental results show a higher surface temperature and a lower relative humidity on a vertically greened wall relative to the bare wall.…”

Section: Comparison To Case Study Approachesmentioning

confidence: 99%

“…The latter is supported by an in situ study examining the impact of vertical greening on a façade receiving almost no solar irradiation. Daemei et al (2021) illustrated that vertical greening can increase the surface temperature in the absence of solar irradiation because evaporation and shading do not occur [20].…”

Section: Comparison To Case Study Approachesmentioning

confidence: 99%

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Preliminary Experimental Laboratory Methods to Analyse the Insulation Capacity of Vertical Greening on Temperature and Relative Humidity

De Groeve,

Kale,

Orr

et al. 2023

Sustainability

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Ground-based vertical greening is one of the well-known nature-based solutions that is widely used in city centres due to its small footprint and the large surface area of vegetation. Although the impact of vertical greening on the local microclimate has already been extensively researched, there is a poor understanding of the impact of vertical greening on historic building fabrics. The impact of vertical greening on microclimate environments has primarily been researched through in situ case-study monitoring; as such, there are currently no standard protocols for investigating this impact in laboratory studies. By performing simulations in controlled laboratory conditions, the influence of vertical greening on specific environmental conditions can be assessed as well as the significance for key mechanisms, such as the insulation capacity of a vegetation layer. Experimental results on the insulation capacity of vertical greening illustrate that the presence of vertical greening reduces the rate of heat exchange between the wall and the surrounding environment compared to the bare wall, resulting in a delayed temperature response of the wall. This delay varies across the seasons or its intensity, which is represented, for instance, by a more pronounced delay in the wall’s surface temperature response in summer than in winter. However, the magnitude of the insulation capacity is more pronounced in winter (up to +2.1 °C) compared to summertime. The insulation capacity of vertical greening is more likely to have a significant impact on façades with a lack of solar irradiation, such as façades facing north or shaded by built surroundings. This experimental investigation can help build an understanding of these processes more fundamentally and support the interpretation of in situ case-study monitoring as well as provide a standardized approach to investigate the environmental performance of vertical greening across climatic regions and seasons.

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Section: Comparison To Case Study Approachesmentioning

confidence: 60%

Section: Comparison To Case Study Approachesmentioning

confidence: 99%

See 1 more Smart Citation

Preliminary Experimental Laboratory Methods to Analyse the Insulation Capacity of Vertical Greening on Temperature and Relative Humidity

De Groeve,

Kale,

Orr

et al. 2023

Sustainability

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“…The analysis results of previous studies suggest that a GW reduces building energy use for heating and cooling by up to 16.5% and 51%, respectively, and can reduce UHI in all the investigated climate zones by up to 5% [21]. The existing research [15,[22][23][24] also demonstrates that a GW is an effective strategy for saving energy in buildings. Furthermore, a GW potentially increases biodiversity in urban areas [25], adds value to properties [26], and improves health and well-being [27].…”

Section: Introductionmentioning

confidence: 82%

The Impact of Orientation on Living Wall Façade Temperature: Manchester Case Study

Gao,

Farrokhirad,

Pitts

2023

Sustainability

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Living walls are a nature-based strategy to enhance climate resilience in urban areas. There is a need to study the possible influence of living walls on the thermal performance of building façades, given the rising temperatures in 2022 across the UK. This study aims to analyze the impacts of living walls on façade temperature based on orientation variation through simulation Envi-met 5.0.3. software. The living wall studied is attached to a multistory building located in Manchester city center consisting of seven evergreen plants. An environmental simulation was carried out linked to the 2022 climate, including extremely hot and cold days. Four scenarios of façades with and without greening on the northwest and southeast orientations in summer and winter were analyzed. The results highlighted the living wall’s ability to reduce the surface temperatures on both the northwest and southeast façades on a hot summer day. There is no significant evidence of improvement for the northwest façade in the winter climate, but a modestly increased temperature is shown in the southeast compared to the bare wall. These findings indicate that living walls provide measurable advantages in the building envelope, leading to energy saving.

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“…In fact, vertical greening uses vegetation to cover buildings, which can bring environmental, economic, social and health benefits. It is an important feature of architectural design for sustainable development [25]. In terms of environment, the urban environment can be enhanced by promoting urban biodiversity [15,26], handling stormwater [27], air quality [28][29][30][31], and mitigating the Urban Heat Island (HUI) [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Vertical Greening Systems: Technological Benefits, Progresses and Prospects

et al. 2022

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A vertical greening system is becoming increasingly crucial in resolving the energy crisis and environmental problems in a sustainable ecosystem. Researchers have conducted a comprehensive study on vertical greening systems from technology, functional and architectural perspectives. These include ecological, economic and social functions. Most of the current studies emphasize the benefits of vertical greening systems to the environment, while vertical greening technology and its socio-economic benefits receive insufficient attention. In order to study the vertical greening field in depth, this paper comprehensively and systematically summarizes vertical greening technology and functions. Meanwhile, based on the Web of Science (WOS), CiteSpace was used to analyze the relevant literature in the vertical greening field from 2012 to 2022, to explore the hot spots, development status and future trends of vertical greening technology, and to build a knowledge map in the vertical greening field. The research shows that as a low impact development technology, the vertical greening system has received the most extensive attention in the past few years. Air quality, microclimate regulation and energy have always been the focus and hot issues of people’s attention. The future research directions are cooling effect, active system and indoor space. This study is aimed at promoting the future development of vertical greening system technology and providing reference and direction for researchers, planners and developers, as well as individuals interested in future urban and rural planning.

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Investigating the thermal performance of green wall: Experimental analysis, deep learning model, and simulation studies in a humid climate

Cited by 23 publications

References 75 publications

Preliminary Experimental Laboratory Methods to Analyse the Insulation Capacity of Vertical Greening on Temperature and Relative Humidity

Preliminary Experimental Laboratory Methods to Analyse the Insulation Capacity of Vertical Greening on Temperature and Relative Humidity

The Impact of Orientation on Living Wall Façade Temperature: Manchester Case Study

Vertical Greening Systems: Technological Benefits, Progresses and Prospects

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