Experimental investigation of the thermal performances of an extensive green roof in the Mediterranean area

Bevilacqua, Piero; Mazzeo, Domenico; Bruno, Roberto; Arcuri, Natale

doi:10.1016/j.enbuild.2016.03.062

Cited by 132 publications

(66 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This agrees with studies conducted in Mediterranean climate areas [20,21]. Reduction of the temperature was apparent during daytime and particularly for sunny days.…”

Section: Parametric Analysissupporting

confidence: 81%

Substrate Depth, Vegetation and Irrigation Affect Green Roof Thermal Performance in a Mediterranean Type Climate

et al. 2017

View full text Add to dashboard Cite

Green roofs are consistently being used to reduce some of the negative environmental impacts of cities. The increasing interest in extensive green roofs requires refined studies on their design and operation, and on the effects of their relevant parameters on green roof thermal performance. The effects of two design parameters, substrate thickness (ST) and conductivity of dry soil (CDS), and four operating parameters, leaf area index (LAI), leaf reflectivity (LR), stomatal resistance (SR), and moisture content (MC), were investigated using the green roof computer model developed by Sailor in 2008. The computer simulations showed that among the operating parameters, LAI has the largest effects on thermal performance while CDS is a more influential design parameter than ST. Experimental investigations of non-vegetated and sparsely vegetated green roofs in Melbourne were principally used to understand the effect of the substrate and enable better understanding of dominant heat transfer mechanisms involved. Investigated green roofs had three substrate thicknesses (100, 150 and 200 mm), and their performance was compared to a bare conventional roof. In contrast to the computer simulations, the experimental results for summer and winter showed the importance of MC and ST in reducing the substrate temperature and heat flux through the green roof.

show abstract

“…This agrees with studies conducted in Mediterranean climate areas [20,21]. Reduction of the temperature was apparent during daytime and particularly for sunny days.…”

Section: Parametric Analysissupporting

confidence: 81%

Substrate Depth, Vegetation and Irrigation Affect Green Roof Thermal Performance in a Mediterranean Type Climate

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Furthermore, different plant species with different height results in the literature are not consistent with one green roof study showing no effective energy savings of a mock up building in Pennsylvania, USA [23]. Another study in the Mediterranean climate in Italy compared the energy performance of a conventional roof with an extensive green roof covered with sedum plants, in which the green roof had a 100% reduction in thermal energy entering the roof in the summer and 30 to 37% of heat loss during the winter [24]. Jaffal et al [4] conducted a study on the effect of a green roof on the energy performance of a single-family house with insulate roof in three different climates.…”

Section: Introductionmentioning

confidence: 84%

Effects of Extensive Green Roofs on Energy Performance of School Buildings in Four North American Climates

Mahmoodzadeh

Mukhopadhyaya

Valeo

2019

Water

View full text Add to dashboard Cite

A comprehensive parametric analysis was conducted to evaluate the influence of the green roof design parameters on the thermal or energy performance of a secondary school building in four distinctively different climate zones in North America (i.e., Toronto, ON, Canada; Vancouver, BC, Canada; Las Vegas, NV, USA and Miami, FL, USA). Soil moisture content, soil thermal properties, leaf area index, plant height, leaf albedo, thermal insulation thickness and soil thickness were used as design variables. Optimal parameters of green roofs were found to be functionally related to meteorological conditions in each city. In terms of energy savings, the results showed that the light-weight substrate had better thermal performance for the uninsulated green roof. Additionally, the recommended soil thickness and leaf area index for all four cities were 15 cm and 5 respectively. The optimal plant height for the cooling dominated climates is 30 cm and for the heating dominated cities is 10 cm. The plant albedo had the least impact on the energy consumption while it was effective in mitigating the heat island effect. Finally, unlike the cooling load, which was largely influenced by the substrate and vegetation, the heating load was considerably affected by the thermal insulation instead of green roof design parameters.

show abstract

“…Research analyzed the thermal performances of different layering solutions when compared to a reference traditional roof. The results indicate that green stratigraphy increases the thermal inertia on a traditional building, also, the thermal inertia of the opaque envelope of the air-conditioned buildings has a high influence on the energy transfer through the roof or wall in dynamic conditions [24] Green roofs provide a wide range of sustainability and ecological benefits while also enhancing the aesthetic qualities and architectural presentation of buildings [19]. Green roofs, like other sustainable strategies, have been successfully used in many countries around the world [25][26][27].…”

Section: Introductionmentioning

confidence: 91%

Energy and Economic Evaluation of Green Roofs for Residential Buildings in Hot-Humid Climates

et al. 2017

View full text Add to dashboard Cite

Green roofs may be considered a passive energy saving technology that also offer benefits like environmental friendliness and enhancement of aesthetic and architectural qualities of buildings. This paper examines the energy and economic viability of the green roof technology in the hot humid climate of Saudi Arabia by considering a modern four bedroom residential building in the city of Dhahran as a case study. The base case and green roof modelling of the selected building has been developed with the help of DesignBuilder software. The base case model has been validated with the help of 3-month measured data about the energy consumption without a green roof installed. The result shows that the energy consumption for the base case is 169 kWh/m 2 while the energy consumption due to the application of a green roof on the entire roof surface is 110 kWh/m 2 . For the three investigated green roof options, energy saving is found to be in the range of 24% to 35%. The economic evaluation based on the net present value (NPV) approach for 40 years with consideration to other environmental advantages indicates that the benefits of the green roof technology are realized towards the end of the life cycle of the building.

show abstract

Experimental investigation of the thermal performances of an extensive green roof in the Mediterranean area

Cited by 132 publications

References 54 publications

Substrate Depth, Vegetation and Irrigation Affect Green Roof Thermal Performance in a Mediterranean Type Climate

Substrate Depth, Vegetation and Irrigation Affect Green Roof Thermal Performance in a Mediterranean Type Climate

Effects of Extensive Green Roofs on Energy Performance of School Buildings in Four North American Climates

Energy and Economic Evaluation of Green Roofs for Residential Buildings in Hot-Humid Climates

Contact Info

Product

Resources

About