Analytical Model for Predicting Thermal Bridge Effects due to Vacuum Insulation Panel Barrier Envelopes

Tenpierik, Martin; Spoel, Wim van der; Cauberg, Hans

doi:10.1002/bapi.200810005

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…In [5], this issue was approached by modifying the surface heat transfer coefficients of the VIP panels. In such a way, it was possible to take into consideration both the thermal resistance of the inner/outer surfaces and the additional thermal resistance of the panels between which the VIP was located.…”

Section: Multilayer Walls With Vip Panels-numerical Analysis Of the Omentioning

confidence: 99%

“…(1) vacuum degradation and ageing by means of gas and water vapor permeation [1][2][3]; (2) the risk of damage (perforated VIPs) [1,4]; (3) thermal bridge effects [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In relation to topic (a), Tenpierik et al [5] and Johansson [7] have investigated the influence of the VIP envelope properties, evaluating the effective thermal conductivity of VIPs that "cumulatively" takes into account thermal bridging.…”

Section: Introductionmentioning

confidence: 99%

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Vacuum Insulation Panels: Analysis of the Thermal Performance of Both Single Panel and Multilayer Boards

et al. 2015

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Abstract:The requirements for improvement in the energy efficiency of buildings, mandatory in many EU countries, entail a high level of thermal insulation of the building envelope. In recent years, super-insulation materials with very low thermal conductivity have been developed. These materials provide satisfactory thermal insulation, but allow the total thickness of the envelope components to be kept below a certain thickness. Nevertheless, in order to penetrate the building construction market, some barriers have to be overcome. One of the main issues is that testing procedures and useful data that are able to give a reliable picture of their performance when applied to real buildings have to be provided. Vacuum Insulation Panels (VIPs) are one of the most promising high performing technologies. The overall, effective, performance of a panel under actual working conditions is influenced by thermal bridging, due to the edge of the panel envelope and to the type of joint. In this paper, a study on the critical issues related to the laboratory measurement of the equivalent thermal conductivity of VIPs and their performance degradation due to vacuum loss has been carried out utilizing guarded heat flux meter apparatus. A numerical analysis has also been developed to study thermal bridging effect when VIP panels are adopted to create multilayer boards for building applications. OPEN ACCESSEnergies 2015, 8 2529

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Section: Multilayer Walls With Vip Panels-numerical Analysis Of the Omentioning

confidence: 99%

“…(1) vacuum degradation and ageing by means of gas and water vapor permeation [1][2][3]; (2) the risk of damage (perforated VIPs) [1,4]; (3) thermal bridge effects [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Vacuum Insulation Panels: Analysis of the Thermal Performance of Both Single Panel and Multilayer Boards

et al. 2015

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“…Thermal bridges due to the VIP envelope -case -a‖have been analytically and numerically investigated in [15], considering the four parameters that mainly influence their linear thermal transmittance, that is: laminate thickness, laminate thermal conductivity, core material thermal conductivity and panel thickness. Other researchers have proposed various solutions to reduce the thermal bridging effects for cases -b‖ and -c‖ [16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of thermal bridging effects of jointed Vacuum Insulation Panels

Lorenzati

Fantucci

Capozzoli

et al. 2016

Energy and Buildings

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Vacuum Insulation Panels (VIPs) are characterised by very low thermal conductivity, compared to traditional insulating materials. For this reason, they represent a promising solution to improve the thermal behaviour of buildings, especially in the case of energy retrofitting (where a higher performance and less thickness is desirable). VIPs are insulating components in which a core material is surrounded by an air tight envelope which allows a high degree of internal vacuum to be maintained. Such features, on the one hand, allow excellent thermal insulation properties to be achieved, but, on the other, require the manufacturing of prefabricated panels of fixed shape/size. This means that the use of these super insulating materials in the building envelope involves the problem of joining the panels to each other and of fixing them onto additional supporting elements. As a result, purposely studied supporting structures or systems are required. However, these structures and systems cause thermal bridging effects. The overall energy performance of the resulting insulation package can therefore be affected to a great extent by these additional elements, and can become significantly lower than that of the VIP panel alone. In order to verify the incidence of thermal bridges on the overall energy performance of an insulation system that makes use of VIP panels, an experimental campaign has been carried out using a heat flux meter apparatus and analysing different joint materials/typologies. First, a measurement method was proposed, tested and verified on the basis of data from the available literature. A series of measurements on different samples was then performed. The experimental results were then used to calibrate and verify a numerical

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Vacuum Insulation Panels (VIPs) for building construction industry – A review of the contemporary developments and future directions

2011

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Demand for energy efficient buildings has increased drastically in recent years and this trend will continue in the future. Insulating building elements will play a key role in meeting this demand by reducing heat losses through the building fabric. Due to their higher thermal resistance, Vacuum Insulation Panels (VIPs) would be a more energy efficient alternative to conventional building insulation materials. Thus, efforts to develop VIPs with characteristics suitable for applications to new and existing buildings are underway. This paper provides a review of important contemporary developments towards producing VIPs for such applications using various materials such as glass fibre, foams, perlite and fibre/powder composites. These materials have been used in different VIP components and their limitations have not been covered in previous review papers published on this topic. Selection criteria, methods to measure important properties of VIPs and analytical and numerical models presented in the past have been detailed. Limitations of currently employed design tools along with potential future materials such as Nano/microcellular foams and SiO x / SiNx coatings for use in VIPs are also described.

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Analytical Model for Predicting Thermal Bridge Effects due to Vacuum Insulation Panel Barrier Envelopes

Abstract: Because of a necessity for sustainability and thus for a reduction of the amount of primary energy generated with fossil fuels, vacuum insulation panels (VIP)

Cited by 7 publications

References 9 publications

Vacuum Insulation Panels: Analysis of the Thermal Performance of Both Single Panel and Multilayer Boards

Vacuum Insulation Panels: Analysis of the Thermal Performance of Both Single Panel and Multilayer Boards

Experimental and numerical investigation of thermal bridging effects of jointed Vacuum Insulation Panels

Vacuum Insulation Panels (VIPs) for building construction industry – A review of the contemporary developments and future directions

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