Theoretical prediction and aging experimental verification of the service life of vacuum insulation panels

Kan, Ankang; Zheng, Ning; Wu, Yu Ping; Wang, Wei; Zhang, Xuexiang; Haofeng, Cai; Cao, Dan

doi:10.1016/j.clet.2022.100484

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…Because of the high pressure difference between the inside and outside of the VIP, atmospheric gas and water vapor slowly begin to penetrate the envelope [8]. Over a long period, as gas and water vapor in the atmosphere slowly permeate into the VIP, the gas pressure inside the VIP increases, and the thermal performance begins to deteriorate [9,13].…”

Section: Methodsmentioning

confidence: 99%

“…Using the acceleration factor for dry air and water vapor of the envelope ( f v , f air ), the change rate of thermal conductivity for VIPs under highly accelerated conditions can be switched with the change rate of thermal conductivity under the standard condition of 23 • C, 50% RH (λ t,23/50 ), as shown in Equation (9). λ p , indicating the thermal conductivity increase rate due to the inner pressure, can be calculated by Equation (10).…”

Section: Estimating the Thermal Conductivity Of Vip After 25 Yearsmentioning

confidence: 99%

“…However, over time, atmospheric gases penetrate the envelope, increasing the inside pressure of the VIP. The thermal conductivity of the VIP begins to increase, which reduces its thermal performance and reduces its service life [9]. The penetration of water vapor into the core material increases the thermal conductivity by increasing the inner pressure [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Development of Accelerated Test Method to Evaluate the Long-Term Thermal Performance of Fumed-Silica Vacuum Insulation Panels Using Accelerated Conditions

Bae,

Kim,

Kang

2023

Materials

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International standards for vacuum insulation panels (VIPs) include an accelerated test method and a minimum quality standard for evaluating their long-term thermal performance after 25 years. The accelerated test method consists of various tests according to the characteristics of the core material and requires six months (180 days) at minimum. Herein, we propose an accelerated method for determining the long-term thermal performance of fumed-silica VIPs by shortening the required time and simplifying the procedure. Highly accelerated conditions (80 °C and 70% Relative humidity (RH)) were set for the evaluation method, using the maximum temperature (80 °C) cited in international standards and compared with the accelerated test method under accelerated conditions (50 °C and 70% RH). The inner-pressure increase rate of the VIP samples after conditioning for approximately 70 days was similar to that after conditioning for 180 days under highly accelerated and accelerated conditions, respectively. In addition, the estimated long-term thermal conductivities of the fumed-silica VIP were derived as 0.0076 and 0.0054 W/m·K under highly accelerated and accelerated conditions, respectively. These accelerated methods can be used to produce fumed-silica VIPs with similar long-term thermal conductivities. Therefore, the accelerated test method for long-term thermal performance using the highly accelerated conditions can be evaluated using a test that involves conditioning the sample for approximately 70 days under 80 °C and 70% RH.

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Section: Methodsmentioning

confidence: 99%

Section: Estimating the Thermal Conductivity Of Vip After 25 Yearsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of Accelerated Test Method to Evaluate the Long-Term Thermal Performance of Fumed-Silica Vacuum Insulation Panels Using Accelerated Conditions

Bae,

Kim,

Kang

2023

Materials

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“…For example, some nano insulation materials are designed to trap air or other gases in their structure, which reduces the movement of heat and slows down thermal transfer. Others use nanoparticle fillers or coatings to increase thermal resistance and reduce heat loss (Kan et al 2022). Nano insulation materials can also be engineered to provide other benefits, such as improved durability and resistance to damage.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Product Delivery Systems with Nanotechnology Insulation Materials to Maintain Temperature Stability

Kathirselvam M

2023

IJRITCC

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This article discusses the use of nanotechnology insulation materials in systems and methods for limiting temperature changes during product delivery. Nanotechnology insulation materials offer a high level of thermal insulation performance, which can help maintain the required temperature range of products during transportation. This can lead to improved product quality, reduced waste, and increased energy efficiency. However, there are also risks and issues associated with the use of these materials, such as health and safety concerns, environmental impact, cost, performance and durability, and regulatory compliance. To fully realize the benefits of nanotechnology insulation materials, it is important to address these risks and issues through careful research, development, and regulation. Overall, the use of nanotechnology insulation materials represents a promising avenue for improving the quality, safety, and sustainability of product delivery systems, and it is important to continue to invest in research and development in this area.

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Thermal insulation capability of nanostructured insulations and their combination as hybrid insulation systems

Lakatos

2023

Case Studies in Thermal Engineering

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Theoretical prediction and aging experimental verification of the service life of vacuum insulation panels

Cited by 7 publications

References 14 publications

Development of Accelerated Test Method to Evaluate the Long-Term Thermal Performance of Fumed-Silica Vacuum Insulation Panels Using Accelerated Conditions

Development of Accelerated Test Method to Evaluate the Long-Term Thermal Performance of Fumed-Silica Vacuum Insulation Panels Using Accelerated Conditions

Enhancing Product Delivery Systems with Nanotechnology Insulation Materials to Maintain Temperature Stability

Thermal insulation capability of nanostructured insulations and their combination as hybrid insulation systems

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