Mid-term and long-term changes in building airtightness: A field study on low-energy houses

Moujalled, Bassam; Leprince, Valérie; Berthault, Sylvain; Litvak, Andrés; Hurel, Nolwenn

doi:10.1016/j.enbuild.2021.111257

Cited by 14 publications

(8 citation statements)

References 18 publications

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“…It is worth noting the ambiguity surrounding the effect of seasonal changes on building airtightness. For example, Moujalled et al [50] did not detect any significant seasonal variation during the measurement of the air leakage rate in different seasons. Only in one case did the airtightness of the building under consideration seem a little better in the summer than in the winter.…”

Section: Features Of Building Components' Degradation In Different En...mentioning

confidence: 96%

“…Among the main causes of this phenomenon are the drying of wooden frames, shrinkage of mastic during the first time the building is heated, cracking at the joints due to structure movements and foundation settlement, deterioration of air sealant applied around windows and doors, a combination of incompatible materials, drilling holes when furnishing, etc. [50,51]. The authors in [52], after analysing other sources, noted that energy losses due to air leakage amount to about 13-50% under heating conditions and about 4-20% under cooling conditions worldwide.…”

Section: Features Of Building Components' Degradation In Different En...mentioning

confidence: 99%

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The Effect of Degradation on Cold Climate Building Energy Performance: A Comparison with Hot Climate Buildings

Taki

Zakharanka

2023

Sustainability

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The issues of reducing energy consumption in buildings and their decarbonisation are currently among the most pressing. However, such an important aspect of the problem under discussion as the impact of unavoidable degradation processes on energy demand in buildings remains poorly understood. In addition, there are only a limited number of practical guidelines that can be used to take this factor into account at the design stage and during the further operation of buildings. The aim of this work was to assess the potential impact of component degradation and ageing on heating energy consumption in buildings, including insulated glass units, thermal insulation, airtightness, heat recovery of mechanical ventilation systems, and photovoltaic modules. The detached and apartment buildings were considered to be in a cold climate in the context of the Republic of Belarus. The study was based on simulation research using EnergyPlus. As a result, it was found that a possible increase in heating energy consumption might reach 17.6–61.2% over 25 years in detached houses and up to 23.6–89.8% in apartment buildings. These indicators turned out to be higher than the previously identified values for cooling energy consumption in a hot–humid climate. Based on the findings, recommendations for considering the degradation factor in cold climates in practice were developed, which were compared and integrated into the author’s existing guidelines.

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Section: Features Of Building Components' Degradation In Different En...mentioning

confidence: 96%

Section: Features Of Building Components' Degradation In Different En...mentioning

confidence: 99%

The Effect of Degradation on Cold Climate Building Energy Performance: A Comparison with Hot Climate Buildings

Taki

Zakharanka

2023

Sustainability

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“…During the heat pump expansion, through-holes for power supply lines, refrigerant pipes, and drain pipes were opened in the air barrier. Except for 19co6 and 22co1, the deterioration in airtightness was classified based on the progress of q50 as follows [10]: ・ Significant decrease in q50 (< -50 m 3 Although assessments were difficult to conduct owing to the small sample size, except 19co6 and 22ip1 two among the five dwellings indicated clear the air flow rate increasing trend, whereas no clear declining trend was observed for airtightness. Fig.…”

Section: Durability Of Building Airtightness Due To Agingmentioning

confidence: 99%

Building air leakage characteristics and airtightness durability of single-family dwelling

Toriumi

Kurabuchi

2023

E3S Web of Conf.

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In this study, we focus on the leakage characteristics and composition of openings associated with building airtightness in wooden single-family dwellings. The proposed parallel combination models for leakage are equal to or better than the power law in terms of compatibility with measured values. Unlike reinforced concrete housing complexes, wooden single-family dwellings indicate variability in terms of the coefficient of leakage characteristics, including in highly airtight units. Dwellings constructed approximately 10 years ago do not exhibit a clear declining trend. However, the airtightness decreases in dwellings that have undergone renovations on the outer walls, such as through the addition of an attic or the installation of additional heat pumps.

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“…However, the level of demand is still high to be entirely met by renewable energy sources or biofuels. Heat exchange through external partitions could be reduced by ensuring the building's airtightness requirement, as well as thermally insulating it [20][21][22][23]. This is a traditional method to reduce energy consumption, including in new or renovated buildings.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Thermal Energy Accumulation Using Soil Layer for Buildings’ Energy Efficiency

et al. 2022

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The cold climate countries require high energy consumption for buildings’ heating. According to EU directives and national law, buildings’ energy efficiency is increasing due to higher investment in the sector. Primary energy consumption for space heating still comprises a large part of global energy consumption. It is essential to develop technological solutions and innovations to reduce energy consumption by using newer, smarter, more natural energy generation and accumulation. The soil layer could be used as a natural material for thermal energy accumulation. The soil’s temperature is higher than atmospheric air in the heating season and is lower in the non-heating season. Underground buildings placed in a soil medium could use less thermal energy for buildings’ heating and cooling during its life cycle. The impact of the wind is eliminated in this underground building case. As the soil temperature rises, the difference in temperature of the building’s inside air and the soil decreases. This means that the heat loss into the soil generates the conditions acting against the heat loss. However, heat spreads further and dissipates in the surrounding soil medium. The analysis of this research results showed that the savings in energy could reach 28 percent in the case of the underground building. Heat loss to the soil could be treated as the charge of the soil by thermal energy. The charging by heat and heat dissipation in the soil was researched experimentally. The dependence of the intensity of the charge on time was analysed and presented in this paper also.

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Mid-term and long-term changes in building airtightness: A field study on low-energy houses

Cited by 14 publications

References 18 publications

The Effect of Degradation on Cold Climate Building Energy Performance: A Comparison with Hot Climate Buildings

The Effect of Degradation on Cold Climate Building Energy Performance: A Comparison with Hot Climate Buildings

Building air leakage characteristics and airtightness durability of single-family dwelling

Investigation of Thermal Energy Accumulation Using Soil Layer for Buildings’ Energy Efficiency

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