A multi-criteria methodology for comparing the energy and environmental behavior of cool, green and traditional roofs

Gagliano, Antonio; Detommaso, Maurizio; Nocera, Francesco; Evola, Gianpiero

doi:10.1016/j.buildenv.2015.02.043

Cited by 130 publications

(46 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These outcomes are coherent with the results of a recent paper by Gagliano et al [33]. Here, an innovative multi-criteria methodology is introduced to compare several roof solutions under a broad perspective, by assigning a score to different indicators that measure the energy and environmental performance.…”

Section: Discussionsupporting

confidence: 83%

Energy savings in buildings or UHI mitigation? Comparison between green roofs and cool roofs

Costanzo

Evola

Marletta

2016

Energy and Buildings

169

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 83%

Energy savings in buildings or UHI mitigation? Comparison between green roofs and cool roofs

Costanzo

Evola

Marletta

2016

Energy and Buildings

169

View full text Add to dashboard Cite

“…The majority of those researches calculates the increased heating demand through energy and microclimatic simulations [21,28,31,33,36,38]; some authors, such as Kolokotroni et al [33], Stavrakakis et al [38] and Pisello et al [37] have performed on-site monitoring of some variables mainly to validate the building simulation model. Finally, some researches analyse the energy performances of cool roofs though a comparative assessment with respect to green roofs [28], or balance cooling savings with the increasing of the heating consumptions in winter [28,35].…”

Section: Discussionmentioning

confidence: 99%

“…Most of the researches have demonstrated that cool roofs involve an annual energy penalty due to their performance in winter [35], considering both analysis of the whole urbanized areas through global climate models [21,31], and specific climatic contexts [28,33,[36][37][38]. In contrast, some other authors have demonstrated that winter heating penalties for cool roofs are negligible in cold climates-even without the effect of snow- [21,39], depending on: the ratio of cloudy to sunny days (which increases during winter), less total solar radiation available on the roofs, the effect of snow.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Impact of Cool Roofs in Temperate Climates through a Comparative Experimental Campaign in Outdoor Test Cells

Barozzi

Pollastro

2016

Buildings

View full text Add to dashboard Cite

Abstract:Over the last few decades many bibliographical studies have been conducted on cool roofs, by analyzing both the energy performance during summer and winter seasons and their contribution in mitigating the urban heat island effect. This paper describes the experimentation carried out in three outdoor test cells to comparatively assess the behavior of a cool roof solution with respect to a ventilated-roof and a warm-roof. The monitored data have confirmed that in summer cool roofs are the best solution, with respect to traditional tile roofing, sensibly reducing surface temperatures as a function of the solar direct radiation level (15-25 • C for I > 600 W/m 2 and 5-15 • C for I < 300 W/m 2 , independently of the season). Furthermore, cool roofs involve an energy saving related to summer cooling by about 20% as to a warm-roof and 15%-20% as to a vented-roof. During winter, cool roofs improve the heating energy performance of a vented-roof by about 12%, against a slightly increased consumption (<5%) if compared to a warm-roof. These data confirm that, in temperate climates, cool roofs are appropriate solutions to sensibly improve summer energy performances with a negligible negative impact during winter, and to positively contribute to the mitigation of the heat island effect.

show abstract

“…Este peso poderia determinar a umidade ideal do ponto de vista do desempenho térmico e também auxiliar no entendimento da variação de desempenho relacionada à insolação da cobertura verde, que também influencia na umidade do substrato (BUCKLAND-NICKS; HEIM; LUNDHOLM, 2016), entre outras variações relacionadas. Como a evaporação do substrato e a evapotranspiração das plantas dependem fortemente da quantidade de água disponível no substrato e são fenômenos que promovem resfriamento (GAGLIANO et al, 2015), é evidente a importância desta característica no desempenho global de resfriamento das envoltórias verdes.…”

Section: Análise Dos Textos -Temperatura Interna Das Edificaçõesunclassified

“…Redução de temperatura interna do ar de ambientes com envoltórias verdes As reduções apresentadas no Quadro 1 referem-se às máximas reduções diurnas, que ocorrem durante o período da tarde; os horários variam conforme a localidade estudada em cada pesquisa. O motivo é a redução do pico de temperatura da superfície externa da laje ou parede, relacionada principalmente à insolação GAGLIANO et al, 2015)…”

unclassified

Comportamento térmico de ambientes internos sob a influência de envoltórias verdes

Montanari

Labaki

2018

PARC Pesq. em Arquit. e Constr.

View full text Add to dashboard Cite

ResumoAs envoltórias verdes são um meio de tornar a vegetação parte integrante da edificação e de seus sistemas, tais como o de resfriamento passivo. No entanto, as dinâmicas que sustentam o bom desempenho térmico destas envoltórias dependem de diversas variáveis. O objetivo deste artigo foi identificar, através de revisão sistemática da literatura recente sobre o tema, o comportamento térmico de ambientes construídos internos sob a influência das envoltórias verdes e verificar quais são as possíveis variáveis de desempenho térmico, conforme suas características. Os trabalhos analisados mostram que a redução de temperatura do ambiente interno é significativa, sendo mais acentuada no caso de paredes verdes. O desempenho térmico das envoltórias verdes depende de variáveis como o tipo de vegetação, densidade de folhagem, composição do substrato, etc., destacando as características climáticas, apesar da maioria das pesquisas focar em resultados de outras variáveis. Foi possível, também, verificar pontos frágeis do conhecimento atual, como as lacunas a respeito do peso da umidade do substrato no resfriamento de coberturas verdes e da falta de estudos que comparem o desempenho de coberturas verdes com coberturas de telhas cerâmicas ou de fibrocimento. A análise das variáveis identificou que estas exercem entre si relações multifacetadas, o que tornou evidente que determinar hierarquias entre estas não é possível e nem prudente. A análise da coerência entre as variáveis é mais importante do que a determinação de hierarquia entre as mesmas, bem como esta ação deve preceder a definição das características de uma determinada envoltória verde a ser implantada em dado lugar.Palavras-chave: Cobertura verde. Parede verde. Fachada verde. Comportamento térmico. Variáveis de desempenho. AbstractGreen envelopes are a means for vegetation to become an integral part of the building and its systems such as the passive cooling. However, the dynamics that sustain a good thermal performance of these envelopes depend on many variables. This article aimed to identify, through the systematic review of recent literature about the topic, the thermal behavior of internal built environments under the influence of green envelopes and which are the possible performance variables according to its features. The analyzed papers show that the temperature reduction of indoor spaces is significant, being more pronounced in the case of green walls. The thermal performance of green envelopes depends on variables such as the vegetation type, leaf density, substrate's composition, etc., highlighting the climatic features despite the fact that most studies focus on results from other variables. It was also possible to verify weak spots of the current knowledge, like the gaps regarding the weight of the substrate's humidity in green roofs' cooling and the lack of investigations that compare the green roof's performance with ceramic tile or fibro cement roofs. The analysis of the variables identified that these exert multifaceted relations between themselves...

show abstract

A multi-criteria methodology for comparing the energy and environmental behavior of cool, green and traditional roofs

Cited by 130 publications

References 48 publications

Energy savings in buildings or UHI mitigation? Comparison between green roofs and cool roofs

Energy savings in buildings or UHI mitigation? Comparison between green roofs and cool roofs

Assessment of the Impact of Cool Roofs in Temperate Climates through a Comparative Experimental Campaign in Outdoor Test Cells

Comportamento térmico de ambientes internos sob a influência de envoltórias verdes

Contact Info

Product

Resources

About