Temperature-induced stresses in vacuum glazing

Simko, T.M.; Fischer-Cripps, Anthony C.; Collins, R.E.

doi:10.1016/s0038-092x(98)00052-8

Cited by 25 publications

(16 citation statements)

References 12 publications

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“…where R va = R vc + R vr and R vc can be calculated with Equation (12). The equation indicates that the thermal resistance in evacuated space is not related to the thickness, hence, the thermal resistance of the gaps is the same in the value.…”

Section: Vip Specimen Using Ghp Method Calculation Conditions and Rmentioning

confidence: 99%

“…The filling type VIPs are often used in new buildings to improve the insulation performance of the walls. Collins [6][7][8][9][10][11][12] studied vacuum glazing which maintains a vacuum layer by using spacers. Vacuum glazing consists of low-emissivity glass and a clear float, with an evacuated space in between rather than air or noble gas.…”

Section: Introductionmentioning

confidence: 99%

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Investigation into Window Insulation Retrofitting of Existing Buildings Using Thin and Translucent Frame-Structure Vacuum Insulation Panels

et al. 2018

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Insulation performance in older buildings is usually poor, so retrofitting the insulation in these buildings would reduce the energy required for heating, resulting in cost and energy savings. Windows account for a significant amount of the heat loss, therefore, we have developed vacuum layer type vacuum insulation panels (VIPs) with a frame structure that is also slim and lightweight. The developed VIPs are inexpensive and easy to install, as well as being slim and translucent, so retrofitting the window insulation of existing buildings can be easily performed. In this paper, we propose a frame covering with a low emissivity film and a gas barrier envelope coating, with a focus on a reasonable design method. Firstly, a structural model was created to evaluate the safety and specifications of the frame using element mechanical analysis. Next, a finite element model (FEM) was created to predict the insulation performance. Subsequently, experimental validation was completed and the insulation performance was evaluated with the measured thermal conductivity by a guarded hot plate (GHP) apparatus. Finally, case studies were used to evaluate the insulation performance under different conditions. The optimum design included a reasonable frame-structure to hold the vacuum layer with a high insulation thermal conductivity performance of approximately 0.0049 W/(m·K).

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Section: Vip Specimen Using Ghp Method Calculation Conditions and Rmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation into Window Insulation Retrofitting of Existing Buildings Using Thin and Translucent Frame-Structure Vacuum Insulation Panels

et al. 2018

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“…Here, R va = R vc + R vr and R vc can be calculated by Equation (12); this thermal resistance is not related to the thickness so the thermal resistance of the gaps is the same. R vr is calculated by Equations (14)- (16), and thermal emissivity ε = 0.9.…”

Section: Framework Of Vip Specimen For Ghp Methods and Its Calculationmentioning

confidence: 99%

“…Therefore, the study of vacuum insulation technology that is applied to buildings has been performed since the 1990s. A representative study of the vacuum insulation technology is the study of vacuum glazing by R. E. Collins [6][7][8][9][10][11][12]. In the corresponding research, pillars are used between two pieces of glasses to form a vacuum layer, and a low emissivity (low-e) film is employed to reduce the thermal emissivity, which is approximately 0.9 for glass [6].…”

Section: Introductionmentioning

confidence: 99%

Development of Numerical Heat Transfer and the Structural Model to Design Slim and Translucent Vacuum Layer Type Insulation Panels to Retrofitting Insulation in Existing Buildings

et al. 2017

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Abstract:The authors develop slim and light-weight vacuum insulation panels (VIPs) by producing vacuum layers with spacers and plastic plates. The developed VIPs have the advantages of a low cost and easy installation, thus facilitating retrofitting insulation of existing buildings. In addition, one of the developed VIPs is slim and translucent so it can be easily used for windows in an internal installation. In this paper, the authors first propose a vacuum layer type slim translucent VIP and focus on a reasonable design method. Next, the authors introduce the design process in which the structural design is obtained with element mechanical analysis and a three-dimensional analysis is conducted for the VIP element. In the study, a heat transfer model is used to predict the insulation performance through finite element analysis (FEA). Subsequently, the authors perform an experiment to measure the thermal conductivity in a guarded hot plate apparatus to validate the performance prediction. Finally, case studies are performed to confirm how the different design conditions affect the insulation performance. The optimum design of the vacuum layer type slim and translucent VIP will have a sufficient structural strength to hold and maintain the vacuum layer. The thermal conductivity is approximately 0.007 W/(m·K), which can effectively improve the insulation performance in applications.

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“…Air was pumped out by means of holes in the glass sheet. The first VIG plate was made by hand [12]. A heat transfer coefficient of 0.8 W/m 2 K was obtained in the central region of the vacuum glass sample [13].…”

Section: Introduction 1research Significancementioning

confidence: 99%

Computational Modelling of VIG Plates Using FEM: Static and Dynamic Analysis

et al. 2022

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Vacuum insulated glass (VIG) panels are becoming more and more popular due to their good thermal performance. Little information about the mechanical or strength parameters, which are crucial for the durability of a window, might be found in the published papers. The purpose of this work was to analyse the impact of different parameters on VIG panels’ mechanical properties. Parameter diversity refers to both geometrical and material characteristics. Static and dynamic analyses using the finite element method (ABAQUS program) were conducted. In addition, 101 various numerical models, created with the use of Python language, were tested. The changes of geometrical parameters were made with constant material parameters and the reverse. It has been concluded that pillars’ material and geometrical properties are crucial considering not only the static response of the VIG plates, but also the dynamic one. Moreover, it was proven that getting rid of the first row of pillars near every edge seal led to an increase in deflection of the glass panes. Additionally, considering results for dynamic response associated with out-of-phase vibrations, spacing between support pillars should be large enough in order to avoid possible damage to the glass pane due to rapidly decreasing distance between them. Further research opportunities have been described.

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Temperature-induced stresses in vacuum glazing

Cited by 25 publications

References 12 publications

Investigation into Window Insulation Retrofitting of Existing Buildings Using Thin and Translucent Frame-Structure Vacuum Insulation Panels

Investigation into Window Insulation Retrofitting of Existing Buildings Using Thin and Translucent Frame-Structure Vacuum Insulation Panels

Development of Numerical Heat Transfer and the Structural Model to Design Slim and Translucent Vacuum Layer Type Insulation Panels to Retrofitting Insulation in Existing Buildings

Computational Modelling of VIG Plates Using FEM: Static and Dynamic Analysis

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