Heterogeneous model for heat transfer in Green Roof Systems

Quezada–García, S.; Espinosa-Paredes, Gilberto; Escobedo-Izquierdo, M. Azucena; Vázquez–Rodríguez, A.; Vázquez-Rodríguez, R.; Ambriz-García, J. J.

doi:10.1016/j.enbuild.2017.01.015

Cited by 18 publications

(6 citation statements)

References 49 publications

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“…Evapotranspiration rates can be measured by weighing or by using soil hygrometers, as explained above. This approach was used by Quezada-Garcia et al (2017) [93] to develop a heterogeneous model of heat transfer for green roofs. Table 8 summarizes all the references regarding the ET phenomenon within green roofs studies.…”

Section: Heat and Mass Transfer Models For Et In Green Roofsmentioning

confidence: 99%

The evapotranspiration process in green roofs: A review

Cascone

Coma

Gagliano

et al. 2019

Building and Environment

140

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Previous research has shown that most of the green roof benefits are related to the cooling effect. In the literature available, however, it is still not clear how and how much the evapotranspiration affects the performance of a green roof. In order to fill the gap in this research topic, this study carries out a review on the cooling effect due to the evapotranspiration process of green roofs. First of all, an overview of the evapotranspiration phenomenon in green roofs, as well as the equipment and methods used for its measurement are presented. Then, the main experimental results available in literature, the physicalmathematical models and the dynamic simulation software used for the evaluation of the latent heat flux are also analysed and discussed among the available literature. Moreover, this review proposes a classification of the results carried out by previous studies as function of the main parameters affecting the evapotranspiration process (e.g. volumetric water content, stomatal resistance, Leaf Area Index, solar radiation, wind velocity, relative humidity, soil thickness, and substrate composition). Additionally, a sensitivity analysis of the results obtained from the literature allowed underlining the correlation among the main factors affecting the evapotranspiration. Finally, a vision of the world area where green roof studies were performed is provided. From the results, it is possible to emphasize that most of the studies that evaluated the evapotranspiration used high precision load cells. Furthermore, all the heat transfer models of green roofs considered in this review took into account the latent heat flux due to evaporation of water from the substrate and plants transpiration, however, only few of them were experimentally validated.

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Section: Heat and Mass Transfer Models For Et In Green Roofsmentioning

confidence: 99%

The evapotranspiration process in green roofs: A review

Cascone

Coma

Gagliano

et al. 2019

Building and Environment

140

View full text Add to dashboard Cite

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“…En el caso de "Des-empeño" y "Modelo", aunque su frecuencia es menor en comparación con los anteriores, muestran una tendencia constante de crecimiento desde el año 2021, llegando a su punto máximo en el año 2023. Este aumento sugiere un interés creciente en evaluar y modelar el rendimiento de los beneficios de los techos verdes (Lamond et al, 2014;Nguyen et al, 2023;Quezada-García et al, 2017) en el contexto de la economía circular, probablemente para comprender mejor su eficacia y potencial de implementación.…”

Section: Resultados Y Discusiónunclassified

Economía circular mexicana

Castillo González,

De Medina Salas,

Giraldi Díaz

et al. 2024

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La economía circular (EC) es un modelo que se contrapone a la economía lineal y busca desacelerar la extracción de materias primas y disposición final de materiales. Para una transición exitosa hacia la EC en México, se necesita adaptarla a la cultura mexicana, establecer sus características, los pasos y las etapas, así como las métricas de la circularidad propias al contexto nacional, establecer el nivel de circularidad que se tiene hoy en día y su proyección a futuro. A nivel internacional cada país ha adaptado el concepto de EC a su contexto teniendo diferentes conceptualizaciones de la EC. México necesita definir la EC que más se adapte a sus características y necesidades. El desafío de establecer la transición hacía una EC en México es importante, ya que requiere de un cambio sistemático y del involucramiento de diversos actores. El presente libro tiene el objetivo de acercarse lo más posible a la conceptualización de EC mexicana.

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“…Given the complexity of testing the fire resistance performance of green roof coverings, numerical modelling of heat transfer through the roof assembly can be considered a useful tool. Studies on heat transfer analysis through green roofs were conducted before by many authors (Ouldboukhitine et al 2011;Tabares-Velasco and Srebric 2012;Chen et al 2015;Quezada-García et al 2017). The models, however, were developed for normal temperatures, assessing the performance of such roofs in real conditions.…”

Section: Introductionmentioning

confidence: 99%

A conceptual framework for modelling the thermal conductivity of dry green roof substrates

Gerzhova

Côté

Blanchet

et al. 2019

BioRes

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The fire performance of green roofs has never been assessed numerically. In order to simulate its fire behavior, the thermal conductivity of a growing media must be determined as an important input parameter. This study characterized the thermal conductivity of a dry substrate and its prediction as a function of temperature, considering temperature effects on soil organic and inorganic constituents. Experimental measurements were made to provide basic information on thermophysical parameters of the substrate and its components. Thermogravimetric analysis was conducted to consider the decomposition of organic matter. An existing model of the thermal conductivity calculation was then applied. The results of calculated and measured solid thermal conductivity showed close values of 0.9 and 1.07 W/mK, which demonstrates that the model provided a good estimation and may be applied for green roof substrates calculations. The literature data of a temperature effect on soil solids was used to predict thermal conductivity over a range of temperatures. The results showed that thermal conductivity increased and depended on porosity and thermal properties of the soil mineral components. Preliminary validation of obtained temperature-dependent thermal conductivity was performed by experiments and numerical simulation.

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Heterogeneous model for heat transfer in Green Roof Systems

Cited by 18 publications

References 49 publications

The evapotranspiration process in green roofs: A review

The evapotranspiration process in green roofs: A review

Economía circular mexicana

A conceptual framework for modelling the thermal conductivity of dry green roof substrates

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