高温真空绝热板的保温性能研究及应用仿真

IF 2.5 4区材料科学 Q2 CHEMISTRY, APPLIED

Journal of Porous Materials Pub Date : 2024-10-14 DOI:10.1007/s10934-024-01689-3

Shijie Chen, Mingxiao Shi, Zhaofeng Chen, Chongying Wu, Qiong Wu, Kai Shen, Lixia Yang

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引用次数: 0

摘要

真空绝热板（VIP）的特点是其独特的真空结构，导致极低的导热系数。然而，其在核电管道中的应用却很少被提及。在这项工作中，超级纤维增强气凝胶（SFRA）作为绝缘核心材料，结合超薄不锈钢气体屏障，开发出一种新型的超级绝缘材料，称为SFRA- vip。它具有极低的导热系数（4.3 mW/m·K）和良好的热稳定性。进一步研究了不锈钢气障厚度、纤维含量、气凝胶密度对sfr - vip保温性能的影响。利用COMSOL Multiphysics软件，模拟了sfr - vip在核电管道高温下的传热行为。研究结果表明，sfr -VIP在高温下表现出优异的保温性能，厚度仅为15 mm，可将450℃降至50℃以下，这将进一步扩大VIP在保温领域的应用范围，特别是在核电管道领域。

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Research on thermal insulation performance and application simulation of high-temperature vacuum insulation panel

Vacuum insulation panel (VIP) is characterized by its unique vacuum structure, which results in extremely low thermal conductivity. However, its application in nuclear power pipelines has been rarely mentioned. In this work, super fiber reinforced aerogel (SFRA) serves as the insulating core material, combined with an ultra-thin stainless steel gas barrier to develop a new type of super insulating material, called SFRA-VIP. It exhibits an extremely low thermal conductivity (4.3 mW/m·K) and favorable thermal stability. Furthermore, the study explored the impact of stainless steel gas barrier thickness, fiber content, and aerogel density on the thermal insulation performance of SFRA-VIP. Using COMSOL Multiphysics, the heat transfer behavior of SFRA-VIP under high temperatures in nuclear power pipelines was simulated. The findings indicate that SFRA-VIP demonstrates outstanding thermal insulation performance at high temperatures, with just a 15 mm thickness reducing 450 °C to below 50 °C, which will further expand the application scope of VIP in the field of thermal insulation, particularly in the area of nuclear power pipelines.

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来源期刊

Journal of Porous Materials 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.70%

发文量

203

审稿时长

2.6 months

期刊介绍： The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.