Vacuum Insulation Panel Production with Ultralow Thermal Conductivity—A Review

IF 2.5 4区 工程技术 Q3 CHEMISTRY, PHYSICAL
Jianzhu Ju, Jingyun Zhao, Changxi Li, Yang Xue
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Abstract

Vacuum insulation panel (VIP) is becoming the main resource of thermal insulation material, which has been widely applied in the recent decades. Varies of core material and sealing method have been developed for VIP applications, typically achieving thermal conductivity below 5 mW/mK. To further decrease the thermal conductivity of VIP, the in-depth understanding of the heat transfer mechanism via different components (e.g. core material conduction, gaseous conduction and thermal radiation) is highly necessary. There are reported experimental and modeling works focusing on individual components involved in VIP, but a comprehensive and summative study combining different factors is still missing. Furthermore, most of researches on VIP study the long-term performance evolvement, while initial conductivity, especially in ultralow conductivity region, is less studied but more scientifically interesting. In this work, the existing works on the analytic model of VIP are reviewed and the quantitative comparison between the different contributions to the overall thermal conductivity is presented. This work aims at the low initial conductivity condition and discusses the possible technical routes to further decrease the initial conductivity. The tools provided here will contribute to the future VIP design using novel core materials and manufacturing techniques, to achieve ultralow thermal conductivity.

超低导热率真空绝热板的生产--回顾
真空绝热板(VIP)正成为绝热材料的主要资源,近几十年来已得到广泛应用。目前已开发出各种芯材和密封方法用于 VIP 应用,其导热系数通常低于 5 mW/mK。要进一步降低 VIP 的导热系数,就必须深入了解不同成分(如芯材传导、气体传导和热辐射)的传热机制。有报告称,实验和建模工作侧重于 VIP 所涉及的单个成分,但仍缺乏结合不同因素的全面总结性研究。此外,大多数有关 VIP 的研究都是针对长期性能演变的,而对初始电导率,尤其是超低电导率区域的研究较少,但却更具科学意义。在本研究中,我们回顾了有关 VIP 分析模型的现有研究,并对不同模型对整体热导率的贡献进行了定量比较。这项工作针对低初始电导率条件,讨论了进一步降低初始电导率的可能技术路线。本文提供的工具将有助于未来使用新型芯材和制造技术进行 VIP 设计,以实现超低导热率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.10
自引率
9.10%
发文量
179
审稿时长
5 months
期刊介绍: International Journal of Thermophysics serves as an international medium for the publication of papers in thermophysics, assisting both generators and users of thermophysical properties data. This distinguished journal publishes both experimental and theoretical papers on thermophysical properties of matter in the liquid, gaseous, and solid states (including soft matter, biofluids, and nano- and bio-materials), on instrumentation and techniques leading to their measurement, and on computer studies of model and related systems. Studies in all ranges of temperature, pressure, wavelength, and other relevant variables are included.
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