The thermal performance of a green roof on a highly insulated building in a sub-arctic climate

Schade, Jeanette; Lidelöw, Sofia; Lönnqvist, Joel

doi:10.1016/j.enbuild.2021.110961

Cited by 30 publications

(12 citation statements)

References 25 publications

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“…Sustainable urban drainage systems have been increasingly developed for building envelopes such as rooftops to improve the energy efficiency of houses and reduce the high volume of runoff during stormwater events [1][2][3][4][5][6][7][8][9][10]. As a sustainable ecosystem system, the green roof is known for its ability to provide thermal resistance for rooftops in some cases and buffer the surface stormwater runoff in urban areas [11][12][13][14][15][16][17][18]. The shape and type of materials used in green roof drainage and substrate layers significantly impact energy efficiency and rooftop water evacuation [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Water permeability, water retention capacity, and thermal resistance of green roof layers made with recycled and artificial aggregates

Kazemi

Courard

Attia

2023

Building and Environment

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Section: Introductionmentioning

confidence: 99%

Water permeability, water retention capacity, and thermal resistance of green roof layers made with recycled and artificial aggregates

Kazemi

Courard

Attia

2023

Building and Environment

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“…For these climates, additional thermal insulation may be necessary. Some studies confirm that the energy benefit of a green roof, and therefore also inverted roofs, on a highly insulated building in a subarctic climate is low [76]. Therefore, it can be assumed that the tested solutions are not recommended in colder climates.…”

Section: Discussionmentioning

confidence: 99%

Moisture Risk Analysis for Three Construction Variants of a Wooden Inverted Flat Roof

Sadłowska-Sałęga

Wąs

2021

Energies

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The paper presents an analysis of the hygrothermal performance of an inverted flat roof with a CLT (cross-laminated timber) structure in a building that meets the requirements of Passive House Standard (PHS) with regards to the potential risk of moisture. The calculations were made in the WUFI®Plus and WUFI®Bio software. The following variants were taken into account: three structure configurations, three different external climates and different scenarios of microclimate control and air change rate. The results of the calculations show that, especially in cooler climates, there is an actual moisture risk in the structure despite the excellent thermal insulation. The structure of the inverted flat roof, due to the use of a tight membrane on the outer side, allows for the partition to discharge the excess moisture only to the inside of the building. Ensuring the comfort of users may require periodic humidification of internal air, which translates directly into an increase in moisture content of the structure. The performed analysis clearly showed that there are no universal solutions. It is important to point out that for the proper performance of inverted wooden roofs, it is crucial to analyse moisture, not only thermal and energy parameters.

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“…Combined with the longitudinal comparison between the arc mean elasticity of building cooling load and the arc mean elasticity of building heat load, the influence of different parameters of building envelope on the annual cumulative cooling load and heat load is analyzed [28,29]. Combined with the horizontal comparison between the average elastic value of the arc mean of building cooling load and the average elastic value of the arc mean of building heating load, the influence degree of building energy load and parameters is sorted, and the factors that need to be given priority in the reconstruction of building envelope in severe cold areas are obtained [30][31][32].…”

Section: Inputmentioning

confidence: 99%

Analysis on the Influence of Building Envelope on Building Energy Efficiency in Severe Cold Area

2022

IJM

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With the rapid development of the global economy, the world energy consumption is increasing day by day. Mankind is facing the problem of energy shortage. Energy conservation and emission reduction has become the focus of countries all over the world. In order to study the influence of building envelope on building energy efficiency in severe cold area, the sensitivity analysis is used to analyze the influence relationship between building envelope and building energy efficiency. Combined with DeST simulation software, the building model is established, and the arc mean elasticity method is used to analyze the sensitivity of building energy load to different building envelope parameters. The results show that the external windows of the building envelope have the greatest impact on the building energy efficiency, followed by the external walls, and the roof has the least impact on the energy efficiency. The sensitivity coefficients of the annual cumulative load to the external windows, exterior walls and roofs of buildings are 7.93%, 5.76% and 5.75% respectively. Studying the influence of enclosure structure on building energy efficiency in severe cold areas has important practical value for reducing building energy consumption in severe cold areas and provides data reference for scientifically improving building energy efficiency and building skill transformation in severe cold areas.

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The thermal performance of a green roof on a highly insulated building in a sub-arctic climate

Cited by 30 publications

References 25 publications

Water permeability, water retention capacity, and thermal resistance of green roof layers made with recycled and artificial aggregates

Water permeability, water retention capacity, and thermal resistance of green roof layers made with recycled and artificial aggregates

Moisture Risk Analysis for Three Construction Variants of a Wooden Inverted Flat Roof

Analysis on the Influence of Building Envelope on Building Energy Efficiency in Severe Cold Area

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