A Comparative Study of Energy Performance of Fumed Silica Vacuum Insulation Panels in an Apartment Building

Lim, Taesub; Seok, jaewang; Kim, Daeung Danny

doi:10.3390/en10122000

Cited by 13 publications

(9 citation statements)

References 52 publications

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“…It is important to select suitable insulation materials for building energy efficiency and security [43]. For example, Lim et al [44] investigated vacuum insulation panels (VIPs) to increase the energy efficiency of building, also phase change materials (PCM) installed in buildings can reduce the indoor air temperature [45], improving the thermal comfort during summer period. A green roof is part of the opaque envelope of a building; it is a complex system, with different layers, and can provide several benefits to the building and its surrounding urban context, including thermal insulation during the heating and cooling seasons.…”

Section: Energy Savingsmentioning

confidence: 99%

The Effects of Green Roofs on Outdoor Thermal Comfort, Urban Heat Island Mitigation and Energy Savings

Mutani

Todeschi

2020

Atmosphere

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There is growing attention to the use of greenery in urban areas, in various forms and functions, as an instrument to reduce the impact of human activities on the urban environment. The aim of this study has been to investigate the use of green roofs as a strategy to reduce the urban heat island effect and to improve the thermal comfort of indoor and outdoor environments. The effects of the built-up environment, the presence of vegetation and green roofs, and the urban morphology of the city of Turin (Italy) have been assessed considering the land surface temperature distribution. This analysis has considered all the information recorded by the local weather stations and satellite images, and compares it with the geometrical and typological characteristics of the city in order to find correlations that confirm that greenery and vegetation improve the livability of an urban context. The results demonstrate that the land-surface temperature, and therefore the air temperature, tend to decrease as the green areas increase. This trend depends on the type of urban context. Based on the results of a green-roofs investigation of Turin, the existing and potential green roofs are respectively almost 300 (257,380 m2) and 15,450 (6,787,929 m2). Based on potential assessment, a strategy of priority was established according to the characteristics of building, to the presence of empty spaces, and to the identification of critical areas, in which the thermal comfort conditions are poor with low vegetation. This approach can be useful to help stakeholders, urban planners, and policy makers to effectively mitigate the urban heat island (UHI), improve the livability of the city, reduce greenhouse gas (GHG) emissions and gain thermal comfort conditions, and to identify policies and incentives to promote green roofs.

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Section: Energy Savingsmentioning

confidence: 99%

The Effects of Green Roofs on Outdoor Thermal Comfort, Urban Heat Island Mitigation and Energy Savings

Mutani

Todeschi

2020

Atmosphere

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“…Reducing the overall thermal transmittance of building envelopes is a key aspect for better thermal comfort and reduced energy consumption of buildings. The need for insulation materials with better thermal properties led researchers to investigate vacuum insulation panels (VIPs) [5] for building applications such as exterior walls of apartment buildings [6], multi-layered wall components with VIPs [7], etc. VIPs can achieve center-of-panel (COP) conductivities of 0.003-0.005 W/m•K, which are much lower than traditional building insulation materials [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Examination of Naturally-Aged Foam-VIP Composites

2019

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This article describes an aging study of a foam-vacuum insulation panel (VIP) composite insulation board installed on a test wall in a natural exposure test facility through a 30-month period. Silica-based VIPs with a polymeric barrier film were used in this study. The study results showed the effectiveness of a VIP-based insulation to reduce the heat gains and losses through a wall compared to regular rigid foam insulation of the same thickness. However, the long-term performance monitoring indicated a gradual decline in the thermal performance of the foam-VIP composite. In addition, one-dimensional numerical models were created to simulate the in situ behavior of the foam-VIP composite. One model utilized constant thermal conductivities of the test wall components and another utilized temperature-dependent thermal conductivities; the latter used measurements of conductivity over temperatures ranging from −15 to 55 °C. The results of the simulations emphasized the need to use both temperature and time-dependent material properties for accurately predicting the long-term performance of VIP-based insulation systems.

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“…However, these new techniques are difficult to install in existing buildings; thus, retrofitting the insulation of existing buildings is an effective way to contribute to energy conservation. As modern state-of-the art thermal insulation, vacuum insulation panels (VIPs), installed in buildings to provide better thermal insulation than traditional thermal insulations (approximately 10 times better), have been reported in some studies [3][4][5].…”

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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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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A Comparative Study of Energy Performance of Fumed Silica Vacuum Insulation Panels in an Apartment Building

Cited by 13 publications

References 52 publications

The Effects of Green Roofs on Outdoor Thermal Comfort, Urban Heat Island Mitigation and Energy Savings

The Effects of Green Roofs on Outdoor Thermal Comfort, Urban Heat Island Mitigation and Energy Savings

Experimental and Numerical Examination of Naturally-Aged Foam-VIP Composites

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

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