Summer period analysis of the performance of a planted roof as a passive cooling technique

Theodosiou, Theodoros

doi:10.1016/s0378-7788(03)00023-9

Cited by 238 publications

(109 citation statements)

References 1 publication

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“…The greenroof had two outflows, and there was one outflow for the reference roof. Runoff water samples were analyzed for pH, BOD 7 …”

Section: Methodsmentioning

confidence: 99%

The use of greenroofs for the mitigation of environmental problems in urban areas

Teemusk¹,

Mander²

2006

WIT Transactions on Ecology and the Environment, Vol 93

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Greenroofs are new technology that can be applied in areas such as present-day cities, where less and less green space is available. Greenroofs have many benefits: they make buildings more thermally efficient, prolong the life of a roof, ameliorate extremes of temperature and humidity, reduce surface water runoff, help to reduce the urban heat island effect, air pollution and noise, and provide green space for people and wildlife. Greenroofs have been studied in many countries, from the point of view of thermal performance, protection of the roof membrane, stormwater retention and runoff quality. Although the results are sitespecific, it is necessary to review these studies. Greenroofs were found to be effective in helping to keep buildings cool in summer and also to reduce building energy consumption. Research showed that planted roofs reduce the temperature fluctuation in the roof membrane. Greenroofs delay rainfall runoff and reduce runoff rate and volume. The results of greenroof runoff water quality showed that they behave as a sink or as source of contaminants in runoff water. The results of the investigation of Light Weight Aggregates (LWA)-based greenroofs in Estonia showed that an extensive greenroof is sufficiently capable of protecting the layers of the base roof from extreme temperatures. Typically, light rain is retained, whereas heavy rain penetrates the greenroof media. The quality of the runoff water varies depending on runoff character and the pollutants accumulated on the roof.

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“…The greenroof had two outflows, and there was one outflow for the reference roof. Runoff water samples were analyzed for pH, BOD 7 …”

Section: Methodsmentioning

confidence: 99%

The use of greenroofs for the mitigation of environmental problems in urban areas

Teemusk¹,

Mander²

2006

WIT Transactions on Ecology and the Environment, Vol 93

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“…Theodosiou [12] addresses the importance of wind speed and relative humidity (RH) for the cooling ability of green roofs. He explains that a dry environment increases the evapotranspiration rate, while wind accelerates this trend by removing humidity from the vicinity of vegetation, therefore enhancing the cooling effect.…”

Section: Evapo-transpiratory Effectmentioning

confidence: 99%

The impact of greening systems on building energy performance: A literature review

Raji

Tenpierik

Dobbelsteen

2015

Renewable and Sustainable Energy Reviews

311

151

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“…During the last two decades, many studies have focused on the thermal and energy performance of green roofs [5][6][7][8][9][10][11][12][13][14]. During the studies, Wong [5] conducted a field measurement to investigate the thermal impacts of rooftop garden in a tropical climate in Singapore.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Evaluation of Energy and Environmental Performances of an Extensive Green Roof of a Building in Subtropical Climate

Ma¹,

Liu²,

Luo³

et al. 2017

J Archit Eng Tech

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Journal of Architectural Engineering Technology AbstractGreen roof has been investigated to be one of the effective means for improving the building energy performance and relieving the urban heat island (UHI) effect. This study presents a case study in South China with a subtropical climate to evaluate the benefits of extensive green roof to the building energy, indoor and outdoor thermal environment through field tests and simulations. During the field tests in summer, a room on the top floor of a residential building was covered with green roof as the studied room, and another similar room with conventional roof was regarded as the reference room. The field tests showed that the green roof has better thermal behaviors in terms of heat insulation and thermal resistance capacities. The field measurements and thermal voting tests revealed that better comfort indoor thermal comfort and lower outdoor air temperature above the roof (reduction by 0.9-3°C) can be achieved using the green roof. Based on the results of field measurements and simulation study, 32.7% of the mean daily energy was saved by using the green roof for the room studied, and 0.75% of the total electricity consumption of the city was estimated to be saved if 15% of the buildings in the city are covered with green roofs.

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Summer period analysis of the performance of a planted roof as a passive cooling technique

Cited by 238 publications

References 1 publication

The use of greenroofs for the mitigation of environmental problems in urban areas

The use of greenroofs for the mitigation of environmental problems in urban areas

The impact of greening systems on building energy performance: A literature review

Comprehensive Evaluation of Energy and Environmental Performances of an Extensive Green Roof of a Building in Subtropical Climate

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