Evaluation of the thermal and structural performance of potential energy efficient wall systems for mid-rise wood-frame buildings

Awad, Hadia; Gül, Mustafa; Zaman, Hamid; Yu, Haitao; Al‐Hussein, Mohamed

doi:10.1016/j.enbuild.2014.07.032

Cited by 19 publications

(13 citation statements)

References 8 publications

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“…It is interesting to note that building with prefabricated systems reduces delivery times and labor costs and that construction with controlled weather conditions is a very interesting approach for regions with severe winters [128]. Prefabrication is also a strategy to make the construction industry more sustainable by reducing waste production and demand for water, raw materials and human capital while increasing energy efficiency by reducing buildings' thermal bridges through the use of standardized methods in a quality-controlled factory [131][132][133][134].…”

Section: Wood Frame Buildingsmentioning

confidence: 99%

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

Cabral

Blanchet

2021

Materials

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The main goal of this study was to review current studies on the state of the art of wood constructions with a particular focus on energy efficiency, which could serve as a valuable source of information for both industry and scholars. This review begins with an overview of the role of materials in wood buildings to improve energy performance, covering structural and insulation materials that have already been successfully used in the market for general applications over the years. Subsequently, studies of different wood building systems (i.e., wood-frame, post-and-beam, mass timber and hybrid constructions) and energy efficiency are discussed. This is followed by a brief introduction to strategies to increase the energy efficiency of constructions. Finally, remarks and future research opportunities for wood buildings are highlighted. Some general recommendations for developing more energy-efficient wood buildings are identified in the literature and discussed. There is a lack of emerging construction concepts for wood-frame and post-and-beam buildings and a lack of design codes and specifications for mass timber and hybrid buildings. From the perspective of the potential environmental benefits of these systems as a whole, and their effects on energy efficiency and embodied energy in constructions, there are barriers that need to be considered in the future.

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Section: Wood Frame Buildingsmentioning

confidence: 99%

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

Cabral

Blanchet

2021

Materials

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“…The previous study [10] highlighted that different stakeholders may apply different measuring methods, imposing a risk of misunderstanding. Out of the reviewed research, roughly 11% referred to results from this previous study [47,53,58,59,76,89,94,101]. However, only two of these studies clearly defined a measuring method [58,94].…”

Section: Review Of Researchmentioning

confidence: 99%

State of Knowledge of Thermal Bridges—A Follow up in Sweden and a Review of Recent Research

Berggren

Wall

2018

Buildings

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It is important to minimize transmission heat transfer losses through the building envelope when designing and building energy efficient buildings in heating dominated climates. In such a climate, a large part of the space heating demand is caused by transmission heat transfer losses through the building envelope. Calculations of these losses must be carried out in a correct way to ensure a properly sized heating system and a good indoor climate. Furthermore, underestimating the transmission heat transfer may lead to energy costs that exceed expectations. A Swedish study was published five years ago which concluded that the state of knowledge was low and simplified methods used were not accurate. Five years has passed since the previous study. The purpose of this follow-up is to investigate whether the state of knowledge among Swedish consultants has increased and to review the progress within the international field. The study shows that little has changed in Sweden. The state of knowledge regarding different measuring methods and the effect on thermal bridges is still not satisfying. Furthermore, the review of recent research shows that the relative effect of thermal bridges vary greatly. More guidelines and education/training are needed. Further research should be carried out with a holistic approach where thermal bridges are investigated with varying construction types, energy efficiency of building envelopes and different measuring methods. climate is achieved by constructing an air tight and well insulted building envelope combined with balanced mechanical ventilation with high heat recovery efficiency. Designing a building according to these principles will result in that the majority of the heating demand is due to transmission heat transfer through the building envelope. Hence, it is important to calculate the transmission heat transfer in a correct way and not underestimate or exclude potential thermal bridges.A heating dominated climate may be defined as a climate where 70% or more of the space conditioning needs is related to heating [4]. It should be noted that also in a heating dominated climate up to 30% of the space conditioning needs may be related to cooling. Hence, buildings still need to be designed to avoid excess temperatures during the warmer part of the year.As mentioned, EPBD2 states that methodology for calculations should take into account European standards and be expressed in a transparent way. Standards are important as they provide reliability, predictability and security. Furthermore, they facilitate communication between different actors, minimizing the risk of misunderstanding. This leads to profits, both from a business perspective and from a macroeconomic perspective [5].A commonly used standard to calculate transmission heat transfer through a building envelope is EN ISO 13789 [6] which in turn refers to two standards regarding thermal bridges; EN ISO 14683 [7] provides a simplified method including default values of linear thermal transmittance and EN ISO 10211 [8] provides...

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“…ASHRAE-90.1 Standard (ASHRAE, 2007) has specified the energy performance requirements for buildings for different climate zones. Edmonton, Alberta lies within the range of 5,000 to 6,000 Heating Degree Days (HDD) (ASHRAE, 2007;Awad et al, 2014). In climate zones of 5,000 to 7,000 HDD, ASHRAE-90.1 Standard (ASHRAE, 2007) recommends a minimum assembly R-value (RSI) for wood-frame buildings of .…”

Section: Introductionmentioning

confidence: 99%

“…Field experiments (Carmeliet et al, 2012) and numerical simulation (Evrard, 2010) are commonly used to investigate the hygrothermal performance of different building components. Awad et al (2014) investigated the long-term thermal and structural performances of innovative mid-rise wood-frame wall systems. In this study different wall-assembly configurations such as staggered and I-Joist wall systems, along with the conventional wall system, were tested for their in-situ long-term thermal performance.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Framework for Investigating the Hygrothermal Properties of Multi-Functional Wood Fibre and XPS Panels for Residential Buildings

Salim

Awad

Gül

et al. 2016

mocs

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In this paper, an experimental setup developed for an ongoing project to investigate the hygrothermal performance of wall systems under different climate conditions is presented. As a step toward establishing the hygrothermal performance of various wood-frame wall assemblies, this research focuses on field experimentation of two types of multi-functional panels (MFPs), along with a conventional wall assembly, in two different locations in Canada: Vancouver, British Columbia, and Edmonton, Alberta. The three wall assembly types are adjacent to one another along the north- and south-facing walls of the test huts in the two cities. This experiment focuses on the effect of the various ambient weather conditions on the two innovative MFPs and on the conventional wall assembly, and on determining the long-term hygrothermal performance of the tested assemblies; it also establishes the passive solar effect on the south-facing assemblies compared to the corresponding north-oriented assemblies. Both MFPs are fixed on the exterior side of a conventional wood-frame wall assembly. The components of the first MFP are 6.4 mm Oriented Strand Board (OSB), 40 mm wood-fiber insulationäóîan environmentally-friendly and fully recyclable materialäóîand 6.4 mm OSB, while those of the second MFP are 6.4 mm OSB, 25 mm Extruded Polystyrene (XPS) core, and 6.4 mm OSB. Along with the details of the experimental setups, some sample data is presented.

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Evaluation of the thermal and structural performance of potential energy efficient wall systems for mid-rise wood-frame buildings

Cited by 19 publications

References 8 publications

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

State of Knowledge of Thermal Bridges—A Follow up in Sweden and a Review of Recent Research

An Experimental Framework for Investigating the Hygrothermal Properties of Multi-Functional Wood Fibre and XPS Panels for Residential Buildings

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