Vacuum insulation panels for building applications—Continuous challenges and developments

Brunner, Samuel; Wakili, K. Ghazi; Stahl, Thomas; Binder, Bruno

doi:10.1016/j.enbuild.2014.09.016

Cited by 62 publications

(34 citation statements)

References 18 publications

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“…The remarkable number of recent review articles [62,63,[66][67][68] shows the interest of the buildings sector in VIPs, and highlights the amount of research that is being developed worldwide in this field. Petter Jelle [69] reviewed the main properties, requirements and possibilities of traditional and future thermal building insulation materials and solutions, including aerogel and VIPs.…”

Section: Strategies For Improving the Thermal Resistance Of Lsf Elementsmentioning

confidence: 99%

Energy efficiency and thermal performance of lightweight steel-framed (LSF) construction: A review

Soares

Santos

Gervásio

et al. 2017

Renewable and Sustainable Energy Reviews

102

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The improvement of the use of renewable energy sources, such as solar thermal energy, and the reduction of energy demand during the several stages of buildings' life cycle is crucial towards a more sustainable built environment. This paper presents an overview of the main features of lightweight steel-framed (LSF) construction with cold-formed elements from the point of view of life cycle energy consumption. The main LSF systems are described and some strategies for reducing thermal bridges and for improving the thermal resistance of LSF envelope elements are presented. Several passive strategies for increasing the thermal storage capacity of LSF solutions are discussed and particular attention is devoted to the incorporation of phase change materials (PCMs). These materials can be used to improve indoor thermal comfort, to reduce the energy demand for air-conditioning and to take advantage of solar thermal energy. The importance of reliable dynamic and holistic simulation methodologies to assess the energy demand for heating and cooling during the operational phase of LSF buildings is also discussed. Finally, the life cycle assessment (LCA) and the environmental performance of LSF construction are reviewed to discuss the main contribution of this kind of construction towards more sustainable buildings.

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Section: Strategies For Improving the Thermal Resistance Of Lsf Elementsmentioning

confidence: 99%

Energy efficiency and thermal performance of lightweight steel-framed (LSF) construction: A review

Soares

Santos

Gervásio

et al. 2017

Renewable and Sustainable Energy Reviews

102

View full text Add to dashboard Cite

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“…Fricke et al [2,33] reported the differential curve for thermal conductivity and pressure for various core materials, providing the methodology to calculate the effective average pore diameter (φ) using experimental data. This was calculated using the variation with gas constant (λ 0 /2), with air as the gas removed (Equation 4 and Figure 6); these works have been cited in multiple studies since their publication [8,13,32,34].…”

Section: Commercial and Super Insulation Heat Transfermentioning

confidence: 99%

“…Simmler et al [1], Fricke et al [2], Baetons et al [3], Alam et al [4], Fuchs et al [5], Johansson [6], Kalnaes and Jelle [7], and Brunner et al [8]. VIP applications are numerous, with example studies including: building retrofit [9], district heating [10], thermal storage [11], and solar energy [12].…”

Section: Introductionmentioning

confidence: 99%

Cellulosic-crystals as a fumed-silica substitute in vacuum insulated panel technology used in building construction and retrofit applications

Tetlow

Simon

Liew

et al. 2017

Energy and Buildings

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Cellulosic-crystals as a fumed-silica substitute in vacuum insulated panel technology used in building construction and retrofit applications, Energy and Buildingshttp://dx.doi.org/10. 1016/j.enbuild.2017.08.058 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThis article investigates impact of substituting fumed silica with a cellulosic-crystal innovation in a commercial Vacuum Insulated Panel (VIP) core. High building performance demands have attracted VIP technology investment to increase production capacity and reduce cost. In building retrofit VIPs resolve practical problems on space saving that conventional insulations are unsuitable for. Three challenges exists in fumed silica: cost, low sustainability properties, and manufacture technical maturity. Cellulosic nano-crystal (CNC) technology is in its infancy and was identified as a possible alternative due to a similar physical nano-structure, and biodegradability. The study aim was to determine a performance starting point and establish how this compares with the current benchmarks. Laboratory cellulosic-crystal samples were produced and supplied for incorporation into commercial VIP manufacture. A selection of cellulosic-panels with core densities ranging 127 -170 kg/m 3 were produced. Thermal conductivities were tested at a pressure of 1 Pa (0.01 mBar), with the results compared against a selection of fumed silica-VIPs with core densities ranging 144 -180 kg/m 3 . Conductivity tests were then done on a cellulosic-VIP with 140 kg/m 3 density, under variable pressures ranging 1 -100,000 Pa (0.01 -1000 mBar). This investigated panel lifespan performance, with comparisons made to a fumed silica-VIP of similar core density. Manufactured cellulosic-samples were found unsuitable as a commercial substitute, with performance below current standards. Areas for cellulosic nano-material technology development were identified that show large scope for improvement. Pursuit could create a new generation of insulation materials that resolve problems associated with current commercial versions. This is most applicable in building retrofit where large ranges of domestic and commercial cases are marginalised from their construction markets due to impracticalities and high upgrade costs. This being a problem in multiple economies globally. Figure 3 with typical layer thicknesses [1,13].VIP thermal conductivities are five to ten times lower than commercial insulations, with the centreof-panel reaching 4 mW/m.K [3,4,14,16]. Albeit excellent performance, the technology is expensive with panel prices multiples of five to ten that of standard insulations [...

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“…For façade applications, transparent insulation materials [11,12] are under development. In 2014, only 10%of the VIPs production were used for insulating buildings, refrigeration and transportation industry were the main users of this technology consuming 30% and 60% of the annual production of VIPs respectively [13]. The uptake of VIPs for building applications has not achieved its full potential due to their high installed cost compared with other insulation products.…”

Section: Introductionmentioning

confidence: 99%

Energy and economic analysis of Vacuum Insulation Panels (VIPs) used in non-domestic buildings

et al. 2017

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The potential savings in space heating energy from the installation of Fumed Silica (FS) and Glass Fibre (GF) Vacuum Insulation Panels (VIPs) were compared to conventional expanded polystyrene (EPS) insulation for three different non-domestic buildings situated in London (UK). A discounted payback period analysis was used to determine the time taken for the capital cost of installing the insulation to be recovered. VIP materials were ranked using cost and density indexes. The methodology of the Payback analysis carried out considered the time dependency of VIP thermal performance, fuel prices and rental income from buildings. These calculations show that VIP insulation reduced the annual space heating energy demand and carbon dioxide (CO2) emissions by approximately 10.2%, 41.3% and 26.7% for a six storey office building, a two floor retail unit building and a four storey office building respectively. FS VIPs had the shortest payback period among the insulation materials studied, ranging from 2.5 years to 17 years, depending upon the rental income of the building. For GF VIPs the calculated payback period was considerably longer and in the case of the typical 4 storey office building studied its cost could not be recovered over the life time of the building. For EPS insulation the calculated payback period was longer than its useful life time for all three buildings. FS VIPs were found to be economically viable for installation onto non-domestic buildings in high rental value locations assuming a lifespan of up to 60 years.

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Vacuum insulation panels for building applications—Continuous challenges and developments

Cited by 62 publications

References 18 publications

Energy efficiency and thermal performance of lightweight steel-framed (LSF) construction: A review

Energy efficiency and thermal performance of lightweight steel-framed (LSF) construction: A review

Cellulosic-crystals as a fumed-silica substitute in vacuum insulated panel technology used in building construction and retrofit applications

Energy and economic analysis of Vacuum Insulation Panels (VIPs) used in non-domestic buildings

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