Improving building envelope knowledge from analysis of 219,000 certified on-site air leakage measurements in France

Mélois, Adeline; Moujalled, Bassam; Guyot, Gaëlle; Leprince, Valérie

doi:10.1016/j.buildenv.2019.05.023

Cited by 28 publications

(12 citation statements)

References 15 publications

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“…The data gathered in those tests is stored in national whole building airtightness databases [6,7]. In the case of France, with more than 200 thousand dwellings analyzed, the most frequently identified leak locations include floor-wall joints, rolling shutter casing, ventilation air terminal devices, electrical grids on external walls, and sliding doors [8,9].…”

Section: Air Leakage Paths Assessmentmentioning

confidence: 99%

Reliability of quantitative and qualitative assessment of air leakage paths through reductive sealing

Cardoso

Ramos

Almeida

et al. 2020

Building and Environment

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A full characterization of a building air leakage is labour intensive. As results of laboratory and mock-up experimentation rarely portray in situ conditions, the assessment of real case studies bring added value. Still, the results of experimentation of the latter face more challenges than the former. In this work a full quantitative and qualitative assessment of air leakage paths is performed, using a light steel framing (LSF) modular building with structural insulated panels (SIPs) as case study. Blower-door measurements undergo for a sealing campaign of eleven steps, a technique often described as reductive sealing. Additionally, smoke tracer measurements were carried out to visually identify the air leakage locations. The application of three regression methods resulted in different uncertainty estimates. Less than 7% of the total air leakage was not attributed to one of the considered types of air leakage paths. Assessing less impacting leakage paths first and placing similar types of air leakage paths in a consecutive sealing order seems to be the most correct strategy when using the reductive sealing technique. On average, at a reference pressure difference of 4 Pa, the sealing step uncertainty averaged, 9.9%, 18.8%, and 27.5%, depending on the method used for regression of the blower door test results. Despite the highest calculated uncertainty, literature shows that the application of the method leading to it, Weighted Line of Organic Correlation (WLOC), provides the results in closer agreement with the observed uncertainty of measurements.

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Section: Air Leakage Paths Assessmentmentioning

confidence: 99%

Reliability of quantitative and qualitative assessment of air leakage paths through reductive sealing

Cardoso

Ramos

Almeida

et al. 2020

Building and Environment

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“…Thermal insulation improvements have been one of the main components of reducing energy consumption with the advancement of building envelope technology. Heat loss due to air leakage in building envelopes can be up to 40% of the total heat loss [7,8]. To prevent this, the traditional insulation materials used in buildings are mineral wool, expanded polystyrene (Expanded Polystyrene-EPS), extruded polystyrene (Extruded Polystyrene-XPS), polyurethane (Polyurethane-PU), cellulose and cork.…”

Section: Thermal Insulation Improvementsmentioning

confidence: 99%

Increasing efficiency with biomimetic approach in thermoregulative building envelope strategies supporting internal thermal comfort

Avcıoğlu

Başak

2020

WJER

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There has been a plea for sustainable use of resources since the twentieth century. Buildings are known to consume forty percent of the world’s resources. Resources such as gas, oil, coal and electrical energy used in heating, cooling and ventilation of buildings are limited, as well as causing air pollution and climate change. For this reason, the energy resources used in the buildings should be used effectively, considering environmental concerns. The aim of this study is to describe the shift in efficient use of energy in buildings using a biomimetic approach in thermoregulative building envelope strategies that support internal thermal comfort. In this study, passive systems integrated into buildings which use solar energy, one of the renewable energy sources for heating, cooling and ventilation purposes have been examined. The methods followed by nature in using solar energy are discussed with the biomimetic approach and suggestions have been made to support the increase of energy efficiency by applying the obtained teachings to passive building envelopes. Keywords: biomimetics; building envelope; kinetic building envelope; passive strategies; Thermal comfort

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“…The building construction faults usually results in conduction leakage of heat. Air un-tightness is also responsible for the heat loss while the air escaped by convections carries the thermal energy, as well [5]. Radiation losses are related to conduction and convection which are heating the surface envelope of the building.…”

Section: Introductionmentioning

confidence: 99%

Possibilities of Increasing of Energy Efficiency in a Small Enterprises - Case Study

Perny¹,

Šály²,

Andras³

et al. 2021

IJSDP

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Reducing the electricity consumption is a current trend which has an economic, social and environmental impact. Measures which are outlined to increase efficiency are also supported by legislation and could be funded from the national or European funds in EU countries. In Slovakia, there are many establishments, public buildings and households built in past decades where energy is being wasted. Approximately the share one third of the consumed energy in Slovakia belongs to industry. This statistic naturally legitimizes the effort to achieve energy savings in this segment. We choose a body which is in use partially as commercial offices and partially as production facility. The matter was to identify areas with excessive energy consumption and propose appropriate measures to avoid unnecessary losses. The paper presents more aspects of building operation regarding of energy consumption, especially in relation with old buildings with more structural and operational defects and propose some ways of the improvements the energy efficiency. The work also includes experimental data and simplified economy considerations related to the proposed measures. Finally the step model is presented in order to simplify the decision making process. The model is relevant and also applicable generally for the other engineering disciplines.

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Improving building envelope knowledge from analysis of 219,000 certified on-site air leakage measurements in France

Cited by 28 publications

References 15 publications

Reliability of quantitative and qualitative assessment of air leakage paths through reductive sealing

Reliability of quantitative and qualitative assessment of air leakage paths through reductive sealing

Increasing efficiency with biomimetic approach in thermoregulative building envelope strategies supporting internal thermal comfort

Possibilities of Increasing of Energy Efficiency in a Small Enterprises - Case Study

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