Improving thermal response of lightweight timber building envelopes during cooling season in three European locations

Pajek, Luka; Hudobivnik, Blaž; Kunič, Roman; Košir, Mitja

doi:10.1016/j.jclepro.2017.04.098

Cited by 46 publications

(30 citation statements)

References 41 publications

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“…In this context, some authors have already pointed out that the traditional thermal transmittance of building envelope elements may not be the most appropriate [2][3][4][5][6]. Inadequate U -values for opaque and transparent elements may lead to higher heating and/or cooling demands, thus worsening the buildings' performance.…”

Section: Introductionmentioning

confidence: 99%

The impact of thermal transmittance variation on building design in the Mediterranean region

et al. 2019

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Contrarily to what happens in northern European countries, buildings in the Mediterranean region are prone to overheating. Consequently, it is important to better understand the role of thermal transmittance of the building envelope elements in the airconditioning consumptions. This paper analyzes the effect of different U-values on the building design in the Mediterranean area. 192 000 residential buildings were randomly generated and the energy consumption assessed for sixteen distinct locations. It was found that, in northern Mediterranean locations, as U-values decrease, the energy consumption also decreases. However, in warmer climates, low thermal transmittances tend to significantly increase the energy consumption. Hence, the lower the latitude, the higher the most adequate U-values, due to the increase of the cooling demands. Additionally, geometry-based indexes were correlated with the buildings energy performance. For high U-values it was found that bigger buildings worsen the energy performance and larger windows tend to improve it. For low U-values, bigger North-faced windows are beneficial. There is an adequate interval of values for which the geometry has a lower impact, which is wider and higher for lower latitudes, thus meaning that not only the building performance improves but architects are also freer to explore alternative designs.

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Section: Introductionmentioning

confidence: 99%

The impact of thermal transmittance variation on building design in the Mediterranean region

et al. 2019

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“…Lightweight timber construction is more suitable for regions with milder summer temperatures rather than hot climates. It should be encouraged that the material of the lightweight construction is characterized by high thermal mass, high thermal effectivity [49]. In addition, compared to the lightweight wood construction, CLT system is not efficient enough to carry the lateral forces and to dissipate in seismic activity due to its heavier weight.…”

Section: Clt As a Sustainable Building Materialsmentioning

confidence: 99%

“…This would mean that CLT buildings would require additional cooling energy in the summer. Previous research has also highlighted that some bio-based materials such as wood may cause overheating due to their lower values of thermal mass [47][48][49]62]. Thermal mass is a property of the mass of a building which enables it to store heat, providing inertia against temperature fluctuations.…”

Section: Adaptability Of Clt Systemmentioning

confidence: 99%

Assessment of Energy Saving Potential by Replacing Conventional Materials by Cross Laminated Timber (CLT)—A Case Study of Office Buildings in China

et al. 2019

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This research evaluates the operational heating and cooling energy consumption of cross-laminated timber (CLT) office buildings in China. The evaluations involve a comparison of the energy consumption of a reference RC structure and CLT system office buildings. Computational simulation results are based on IES-VE 2019 and show that the estimated heating energy saving ratio of CLT buildings in Harbin, Beijing, Shanghai, and Kunming to the reference structure are 11.97%, 22.11%, 30.94%, and 23.30% respectively. However, the CLT buildings consume more energy for cooling in the summer. The results of the research show significantly higher heating energy reductions for CLT buildings in the Cold Region and Severe Cold Regions of China. Thus, the application of the CLT system is better suited to northern China than southern China. The results of the research can be used in further assessment of the use of CLT systems in different climatic regions in China.

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“…In contrast, seasonal temperature variations resulting in overcooling and overheating represent a disadvantage in bioclimatic design. Therefore, it is necessary to prevent thermal losses in winter and heat gains in summer with efficient building envelope systems (Hudobivnik et al 2016;Pajek et al 2017;Kunič 2017). Defined strengths and weaknesses are stimuli for building envelope design (Krainer 1993b).…”

Section: Morphology Of Engineering Design Of Built Environmentsmentioning

confidence: 99%

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Dovjak¹,

Kukec²

2019

Creating Healthy and Sustainable Buildings

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Improving thermal response of lightweight timber building envelopes during cooling season in three European locations

Cited by 46 publications

References 41 publications

The impact of thermal transmittance variation on building design in the Mediterranean region

The impact of thermal transmittance variation on building design in the Mediterranean region

Assessment of Energy Saving Potential by Replacing Conventional Materials by Cross Laminated Timber (CLT)—A Case Study of Office Buildings in China

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