Subtropical summer thermal effects of wirerope climber green walls with different air-gap depths

Lee, Louis S.H.; Jim, Chi Yung

doi:10.1016/j.buildenv.2017.09.021

Cited by 56 publications

(13 citation statements)

References 28 publications

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“…According to Figure 11, it is possible to determine that the alveoli have a great influence on the thermal insulation of the blocks, especially at higher temperatures. It was observed that choosing a block with a larger number of alveoli may be a more effective option, rather than choosing a thicker block, when high FRT is desired, which corroborates with what was concluded by Lee (2017), as to the fact that the influence of the alveoli in a block becomes practically null at low temperatures. Considering the response of the models, it was found that, at higher temperatures, the convective and irradiative phenomena that occur inside the blocks are more relevant than the thermal conduction, which occurs through the material.…”

Section: Resultssupporting

confidence: 85%

Análise numérico-experimental de paredes de alvenaria de bloco cerâmico com diferentes espessuras em altas temperaturas

Bolina

Tutikian

Gonçalves

et al. 2019

Revista de la Asociación Latinoamericana de Control de Calidad,

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O estudo discute sobre a resistência ao fogo de sistemas de vedação vertical compostos por blocos cerâmicos com furos verticais em altas temperaturas. O sistema construtivo de vedação em alvenaria é amplamente utilizado no mercado da construção civil no Brasil por tratar-se de um sistema de baixo custo e alta produtividade em comparação aos elementos convencionais. Os resultados foram obtidos com modelos computacionais de elementos finitos, através do software Ansys Mechanical, calibrados por ensaio experimental em escala real, determinando-se o tempo de resistência ao fogo (TRF) para diferentes geometrias de blocos. As análises computacionais levaram a resultados que apontam um limite para eficiência do aumento de espessura de uma parede para se atingir TRF elevados em relação ao isolamento térmico.

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Section: Resultssupporting

confidence: 85%

Análise numérico-experimental de paredes de alvenaria de bloco cerâmico com diferentes espessuras em altas temperaturas

Bolina

Tutikian

Gonçalves

et al. 2019

Revista de la Asociación Latinoamericana de Control de Calidad,

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“…The literature also describes active green walls with forced air circulation. Despite frequent installation of such elements on the facade, they mainly affect the internal environment of the building [ 211 ].…”

Section: Resultsmentioning

confidence: 99%

Statistical Review of Quality Parameters of Blue-Green Infrastructure Elements Important in Mitigating the Effect of the Urban Heat Island in the Temperate Climate (C) Zone

Antoszewski

Świerk

Krzyżaniak

2020

IJERPH

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Urban Heat Island (UHI) effect relates to the occurrence of a positive heat balance, compared to suburban and extra-urban areas in a high degree of urbanized cities. It is necessary to develop effective UHI prevention and mitigation strategies, one of which is blue-green infrastructure (BGI). Most research work comparing impact of BGI parameters on UHI mitigation is based on data measured in different climate zones. This makes the implication of nature-based solutions difficult in cities with different climate zones due to the differences in the vegetation time of plants. The aim of our research was to select the most statistically significant quality parameters of BGI elements in terms of preventing UHI. The normative four-step data delimitation procedure in systematic reviews related to UHI literature was used, and temperate climate (C) zone was determined as the UHI crisis area. As a result of delimitation, 173 publications qualified for literature review were obtained (488 rejected). We prepared a detailed literature data analysis and the CVA model—a canonical variation of Fisher’s linear discriminant analysis (LDA). Our research has indicated that the BGI object parameters are essential for UHI mitigation, which are the following: area of water objects and green areas, street greenery leaf size (LAI), green roofs hydration degree, and green walls location. Data obtained from the statistical analysis will be used to create the dynamic BGI modeling algorithm, which is the main goal of the series of articles in the future.

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“…These studies varied in terms of methodology and climates and include measurements for: climbing walls attached on an actual building [22]; planter boxes walls on actual buildings [23], [24]; evaluating the cooling potential during summer of a felt layer type wall installed on an actual office building façade [25]; individual stand-alone walls that best match the planter boxes type of walls with the aim to validate a thermodynamic model [26]; a scaled down building of a living wall with a substrate layer and six plant species [27]; a full-scale test box that had a felt layer green wall and different levels of insulation [28]; a climbing wall and a felt layer wall installed on two different buildings with the intention of validating a simulation model [29]; a living wall (with substrate but unclear if planter boxes or felt layers were used) in order to validate a relevant hygrothermal model [30]; evaluating the shading potential of different types of climbing plants by using test cell spaces [31], [32]; testing the impact of climbing walls on heat losses through the wall in winter by using 20 small scale outdoor cuboids [33]; and testing the cooling potential and, air purification and humidification ability of an indoor Active Living Wall (ALW) with fans forcing air through it [34]. The most relevant to our paper recent study was reported in [35] where the authors measured temperatures on green walls with: planter boxes; a felt layer (mineral wool), and; climbing plants, and compared them with measurements taken from a bare wall.…”

Section: Review Of Relevant Green Wall Studiesmentioning

confidence: 99%

Experimental comparison of green facades with outdoor test cells during a hot humid season

Kokogiannakis

Darkwa

Badeka

et al. 2019

Energy and Buildings

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We used outdoor test cells during a hot humid period to analyse the surface temperatures behind the following four types of green walls: a felt layer wall; a planter boxes wall; a direct climbing plants wall, and; an indirect climbing plants wall. We compared these temperatures with temperatures of a bare wall and we found that all four types of green facades were able to maintain lower temperatures than the bare wall, and that the felt layer and planter boxes wall had lower temperatures than the other walls for the majority of the study period. In particular, the daily average and peak surface temperatures behind the felt layer wall were by 1.9C to 4.8C and by 7.1C to 13.4C respectively lower than the bare wall. We undertook a significance analysis and produced Pearson coefficients to better understand the relationship between average daily weather conditions and the surface temperatures on all five test cells. We noted that the average daily solar radiation flux did not affect the surface temperatures behind the planter boxes and felt layer walls, but the daily average ambient air temperature was significantly correlated with the average and peak surface temperatures behind all four green facades. Finally, we concluded that the cooling potential of the felt layer and the planter boxes walls increases with higher amounts of solar radiation and higher ambient temperatures. In addition, from the analysis of the diurnal temperature variations and the time series trends we illustrated that the temperatures behind the felt layer and planter boxes walls fluctuated less than the other walls, which lead to a slower rate of surface temperature reductions during a cooler day than the other wall types of the study.

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Subtropical summer thermal effects of wirerope climber green walls with different air-gap depths

Cited by 56 publications

References 28 publications

Análise numérico-experimental de paredes de alvenaria de bloco cerâmico com diferentes espessuras em altas temperaturas

Análise numérico-experimental de paredes de alvenaria de bloco cerâmico com diferentes espessuras em altas temperaturas

Statistical Review of Quality Parameters of Blue-Green Infrastructure Elements Important in Mitigating the Effect of the Urban Heat Island in the Temperate Climate (C) Zone

Experimental comparison of green facades with outdoor test cells during a hot humid season

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