The effects of rooftop garden on energy consumption of a commercial building in Singapore

Wong, Nyuk Hien; Cheong, David; Yan, Hong; Soh, Jia Hao; Ong, Chui Leng; Sia, Angelia

doi:10.1016/s0378-7788(02)00108-1

Cited by 349 publications

(162 citation statements)

References 6 publications

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“…Their results show that increasing the value of LAI will lead to a reduction of summer indoor air temperature and cooling demand. Wong et al [20] found a lower temperature under a thick canopy layer and conversely a higher temperature under sparse foliage ranging from 26.5 ºC to 36 ºC. In line with the previous studies, the result of a mathematical model developed by Kumar & Kaushik [21] conforms that the heat flux through the green roof and the indoor air temperature will reduce by increasing the density of the foliage (or leaf area index).…”

Section: Shading Effectsupporting

confidence: 63%

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

Raji

Tenpierik

Dobbelsteen

2015

Renewable and Sustainable Energy Reviews

313

151

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Section: Shading Effectsupporting

confidence: 63%

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

Raji

Tenpierik

Dobbelsteen

2015

Renewable and Sustainable Energy Reviews

313

151

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“…Low U-values indicate good levels of thermal insulation, whereas high U-values indicate the opposite. Wong et al [13] identified in a originally nonthermal insulating building a reduction in U-value from 2.39 to 1.19 W/m²K after its roof covered with turf. In addition, Alcazar & Bass [14] and Castleton [15] also evidenced the role of vegetation in reducing U-value.…”

Section: Resultsmentioning

confidence: 99%

Retrofitted green roofs and walls and improvements in thermal comfort

Feitosa¹,

Wilkinson²

2017

AIP Conference Proceedings

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Abstract. Increased urbanization has led to a worsening in the quality of life for many people living in large cities in respect of the urban heat island effect and increases of indoor temperatures in housing and other buildings. A solution may be to retrofit existing environments to their former conditions, with a combination of green infrastructures applied to existing walls and rooftops. Retrofitted green roofs may attenuate housing temperature. However, with tall buildings, facade areas are much larger compared to rooftop areas, the role of green walls in mitigating extreme temperatures is more pronounced. Thus, the combination of green roofs and green walls is expected to promote a better thermal performance in the building envelope. For this purpose, a modular vegetated system is adopted for covering both walls and rooftops. Rather than temperature itself, the heat index, which comprises the combined effect of temperature and relative humidity is used in the evaluation of thermal comfort in small scale experiments performed in SydneyAustralia, where identical timber framed structures prototypes (vegetated and non-vegetated) are compared. The results have shown a different understanding of thermal comfort improvement regarding heat index rather than temperature itself. The combination of green roof and walls has a valid role to play in heat index attenuation.

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“…A 10 cm increase in soil thickness increases the thermal resistance of dry clay soil by 0.4 m2 K/W (Wong et al, 2003). However, the presence and quantity of the water largely influence the thermal properties of the green roof.…”

Section: Measures For Reducing Ghg Emissions From Buildingsmentioning

confidence: 99%

Review of sustainability in buildings

Abdellatif

Al-Shamma’a

2015

Sustainable Cities and Society

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Review of sustainability in buildingshttp://researchonline.ljmu.ac.uk/2205/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Users may download and/or print one copy of any article(s) in LJMU Research Online to facilitate their private study or for non-commercial research. You may not engage in further distribution of the material or use it for any profit-making activities or any commercial gain.The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription. AbstractAt present, It is estimated that the building sector contributes up to 45% of annual greenhouse gas emissions primarily through the use of fossil fuels during their operational phase and consumes up to 40% of all energy in UK. Given the massive growth in new construction in economies in transition, and the inefficiencies of existing building stock, if nothing is done, greenhouse gas emissions from buildings will be more than double in the next 20 years. This is a review paper describe the extent and nature of sustainable buildings in UK, either within new or refurbishing old ones, in order to move away from traditional methods of construction and to look at multi-disciplinary and integrated approaches, as well as end-user perspectives.Key words: Built environment, climate change, energy-efficient buildings, GHG emissions. IntroductionToday, it is widely accepted that human activities are contributing to climate change. The Investing in achieving such results in the building sector also has the potential to boost the local economy and improve living conditions. Given the UK's commitment to cut GHG emissions by at least 80% by 2050 relative to 1990 levels, the government recently updated the details of its strategy and milestones for the next five years in its Carbon Plan. Energy efficiency measures in the UK have historically been primarily delivered by government-backed schemes and supplier obligation programmes (which set targets for energy suppliers) (Mallaburn & Eyre, 2014;Rosenow, 2012). However, to deliver projected energy efficiency measures in the future, the UK government has proposed a combination of market-based and government-regulated interventions, under the 'Green Deal' , the 'Energy Company Obligation' (DECC, 2012a) and 'Renewable Heat 3 Incentive (RHI)' . These schemes are designed to help people make energy efficiency improvements to buildings by allowing them to pay the costs through their energy bills rather than upfront. Research Problem and MethodThis study takes a brief look at the concept of sustainability in existing UK building through the review of relevant literature. It is aiming to present sustainable measures and to investigate how these measures would cont...

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The effects of rooftop garden on energy consumption of a commercial building in Singapore

Cited by 349 publications

References 6 publications

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

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

Retrofitted green roofs and walls and improvements in thermal comfort

Review of sustainability in buildings

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