A review of the challenges posed by the use of vacuum panels in external insulation finishing systems

Gonçalves, Márcio; Simões, N.; Serra, Catarina; Flores‐Colen, Inês

doi:10.1016/j.apenergy.2019.114028

Cited by 84 publications

(43 citation statements)

References 62 publications

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“…Vacuum Insulation Panel (VIP) is one of the candidates to meet these needs due to its excellent thermal insulation performance, i.e., a very low thermal conductivity of 4 mW/(mK). It is slowly being introduced into buildings in certain elements of the interior and exterior thermal insulation composite system [1]. VIP consists of a core and an envelope.…”

Section: Introductionmentioning

confidence: 99%

Effect of Foaming Temperature on Microstructure, Mechanical Properties and Flame Spread Rate in PET–PEN Copolymer

2021

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Polymer foams are expanding their applications into functional materials. Partial foam structure has been fabricated in polyethylene terephthalate–polyethylene naphthalate (PET–PEN) copolymer by solid state foaming. Through SEM image analyses, a potential to fabricate gradient foam structures with micropores and unfoamed skin layers has been identified. The post-foaming temperature Tf tune the pore size distribution. Radial distribution of micromechanical properties, indentation hardness and elastic modulus were measured for the partial foam and their values were around 0.12 GPa and 2.0 GPa, respectively, for the outer foamed region. Foaming temperature affects the glass transition temperature Tg, the coefficient of thermal expansion and the flame spreading rate. For the range of Tf ≤ 60°C, thermal expansion coefficients for T> Tg are about 0.5 m/m°C (steep expansion group, SEG). When Tf is above 80 °C, they are around 0.02 m/m°C (mild expansion group, MEG). The burning rate of SEG is 2.8 times higher than that of MEG.

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Section: Introductionmentioning

confidence: 99%

Effect of Foaming Temperature on Microstructure, Mechanical Properties and Flame Spread Rate in PET–PEN Copolymer

2021

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“…Due to their structure and composition, VIPs could reach high performance with thermal conductivity as low as 0.002-0.004 W/(mK) [28,30]. However, thermal conductivity increases over time due to any gases or water vapour permeating through the envelope.…”

Section: Research Challengesmentioning

confidence: 99%

The status of refrigeration techniques for vaccine storage and transportation in low-income settings

Cattin¹,

Jonnalagedda²,

Makoliso³

et al. 2020

Preprint

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Vaccines need to be continuously stored between 2°C to 8°C, from their production to administration to beneficiaries. Every year, more than 25% of vaccines are wasted. One of the main reasons for this wastage is the lack of cold chain continuity in low-income settings, where electricity is scarce. Recently, several advances have been made in cooling technologies to store and transport vaccines. The current paper presents a review of refrigeration technologies based on scientific publications, industry white papers and other grey literature. For each refrigeration method, we describe its working principle, the best performing devices available as well as the remaining research challenges in order to obtain a very high degree of performance enhancement. Finally, we comment on their applicability for vaccine transport and storage.

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“…However, conversely, the authors reveal that "Monolithic aerogel has not found any commercial application in buildings so far, as it is rather brittle and cannot be efficiently produced in sizes exceeding a few centimeters". Among the existing products, mentioned above, durability studies were carried out for vacuum insulation panels (VIP) with an aerogel core, which has an estimated useful life of more than 50 years [15], while for aerogel granules and the materials for blankets, can lead to deterioration when exposed to higher temperatures (70 °C) and relative humidity (>90%). Nevertheless, the authors suggest that for most typical building applications, this is not a concern [11].…”

Section: Fonte: Author's Ownmentioning

confidence: 99%

Use of Aerogel in Cementitious Matrices for Lightweight Construction: A Systematic Review

Oliveira¹,

Silva²

2020

Blucher Engineering Proceedings

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A growing effort for lightweight constructions, such as temporally shelters, and emergency will be a trend in the post-COVID-19 scenario. In this context, a systematic review was developed on the performance of the use of aerogel in the cementitious matrix for prefabricating constructions. A set of academic platforms and keywords were used to investigate articles over the past 6 years. In total, a database was created with 145 files, of which 50 were relevant to the research. Among the works, the results showed densities were between 65 to 230 kg/m³, thermal conductivity 15 to 28 mW / (m.K) and compressive strength from 3 to 23.6 MPa. There is a greater tendency for the use of aerogel for thermal comfort and lightness, to the detriment of permeability and mechanical resistance.

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A review of the challenges posed by the use of vacuum panels in external insulation finishing systems

Cited by 84 publications

References 62 publications

Effect of Foaming Temperature on Microstructure, Mechanical Properties and Flame Spread Rate in PET–PEN Copolymer

Effect of Foaming Temperature on Microstructure, Mechanical Properties and Flame Spread Rate in PET–PEN Copolymer

The status of refrigeration techniques for vaccine storage and transportation in low-income settings

Use of Aerogel in Cementitious Matrices for Lightweight Construction: A Systematic Review

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