Performance assessment of thermal bridge elements into a full scale experimental study of a building façade

Garay, Roberto; Uriarte, Amaia; Apraiz, Inés

doi:10.1016/j.enbuild.2014.09.024

Cited by 37 publications

(28 citation statements)

References 11 publications

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“…In any case, for economic and environmental reasons, it is crucial to reduce the consumption of conventional energy in buildings, which can be achieved by enhancing the quality of the thermal envelope, by using more efficient installations and by introducing renewable energy technologies. With this purpose, EU Energy Performance of Buildings Directives (EPBD) have been published in recent years to be adopted by all EU member states [6], such as the Directive 2002/91/EC [7] and, more recently, the Directive 2010/31/EU [3], which is an upgrade of the previous one. They both recognize a significant potential for energy savings in the buildings sector and provide guidelines to improve the energy performance of buildings within the European Union.…”

Section: Introductionmentioning

confidence: 99%

Contribution of structural lightweight aggregate concrete to the reduction of thermal bridging effect in buildings

Real

Gomes

Rodrigues

et al. 2016

Construction and Building Materials

158

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Section: Introductionmentioning

confidence: 99%

Contribution of structural lightweight aggregate concrete to the reduction of thermal bridging effect in buildings

Real

Gomes

Rodrigues

et al. 2016

Construction and Building Materials

158

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“…However, this law is valid only for ideal situations and steady states. Walls have limited surfaces, they present discontinuities due to joineries and glazing, thermal bridges due to construction faults [37,38], etc. In addition, the various layers are made up of different types of materials with different values of physical parameters of resistance to the passage of the heat [39].…”

Section: U Thermal Transmittance Of the Enclosuresmentioning

confidence: 99%

The Passivhaus Standard in the Spanish Mediterranean: Evaluation of a House’s Thermal Behaviour of Enclosures and Airtightness

et al. 2019

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Few houses have been built in the Spanish Mediterranean in accordance with the Passivhaus (PH) standard. This standard is adapted to the continental climates of Central Europe and thorough studies are necessary to apply this standard in Spain, especially in the summer. High relative air humidity levels in coastal areas and solar radiation levels of west-facing façades require adapted architectural designs, as well as greater control of air renewal and dehumidification. A priori, energy consumptions undergo big variations. In this study, the construction of a single-family house in the Spanish Levante was analysed. All enclosure layers were monitored using sensors of surface temperature, solar radiation, indoor and outdoor air temperature, relative humidity, and air speed. The thermal behaviour of the façade enclosure and air infiltration through the enclosure were examined using the blower door test and impacts on annual energy demand were quantified. Using simulation tools, improvements are proposed, and the results are compared with examples of PH housing in other geographical areas. The annual energy demand of PH housing was 69.19% below the usual value for buildings in the Mediterranean region. Very thick thermal insulation and low values of airtightness could be applied to the envelope, which would work very well in the winter. These technique solutions could provide optimal comfort conditions with a well-designed air conditioning system in summer and low energy consumption.

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“…Out of the identified studies, less than 10% clearly defined the method for quantification of building elements [54,58,66,74,94,97,98]. Except for the study mentioned above [74], only two more studies were identified where both specific values for thermal bridges were presented in combination with a clearly defined method for quantification of building elements [97,98].…”

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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Performance assessment of thermal bridge elements into a full scale experimental study of a building façade

Cited by 37 publications

References 11 publications

Contribution of structural lightweight aggregate concrete to the reduction of thermal bridging effect in buildings

Contribution of structural lightweight aggregate concrete to the reduction of thermal bridging effect in buildings

The Passivhaus Standard in the Spanish Mediterranean: Evaluation of a House’s Thermal Behaviour of Enclosures and Airtightness

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

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