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Examination on aerogel based on the heat transfer characteristics of nanotechnology
Ferroelectrics ( IF 0.8 ) Pub Date : 2021-09-09 , DOI: 10.1080/00150193.2021.1905719
Chenxiaoning Meng 1 , Hengyi Yuan 2
Affiliation  

Abstract

With the rapid development of global industrialization, the research and development of new thermal insulation materials has great social and economic significance for national development and social progress. Due to the porous network structure of nanotechnology, the porosity of aerogel is 80–99.8%, the thermal conductivity can be as low as 0.013 w/(m k) at room temperature. It is the best insulation material by far, it has important value in the fields of aerospace, petrochemical, electric metallurgy, shipbuilding, precision instruments and so on. This paper is based on aerogel nanotechnology materials at home and abroad. In order to solve the problem of the study on heat transfer characteristics based on nanotechnology is not perfect, and the calculation model of solid phase thermal conductivity coefficient and total thermal conductivity of complex nanotechnology structure is not accurate enough. Through a heat transfer calculation method suitable for nanotechnology to conduct more detailed and in-depth research on these issues, introduces and analyzes the development of the equivalent thermal conductivity calculation model of Novel Aerogel nanotechnology insulation material in recent years. And analyzed The heat transfer characteristics and thermal insulation principle of nanotechnology aerogel by using equivalent thermal conductivity calculation model of aerogel nanotechnology insulation material. Research indicates: For aerogel nanotechnology materials, Use heat transfer calculation method aerogel nanotechnology insulation materials can be well calculated using a heat transfer calculation method that suitable for nanotechnology can calculate the equivalent thermal conductivity of aerogel nanotechnology insulation material very well; nanotechnology particles and aerogel meshes and continuous spatial network structures are reason for the very low thermal conductivity of aerogels; The heat transfer of the material is mainly achieved by convection, radiation and heat transfer. So it is possible to reduce the thermal conductivity from the heat transfer path of the material.



中文翻译:

基于纳米技术传热特性的气凝胶研究

摘要

随着全球工业化的快速发展,新型保温材料的研发对国家发展和社会进步具有重大的社会经济意义。由于纳米技术的多孔网络结构,气凝胶的孔隙率为80-99.8%,室温下热导率可低至0.013 w/(mk)。是迄今为止最好的绝缘材料,在航空航天、石油化工、电力冶金、造船、精密仪器等领域具有重要价值。本文基于国内外气凝胶纳米技术材料。为了解决基于纳米技术的传热特性研究不完善的问题,复杂纳米结构的固相热导系数和总热导率计算模型不够准确。通过一种适用于纳米技术的传热计算方法对这些问题进行更细致深入的研究,介绍和分析了近年来新型气凝胶纳米技术隔热材料等效热导率计算模型的发展情况。并利用气凝胶纳米技术绝热材料等效热导率计算模型分析了纳米技术气凝胶的传热特性和绝热原理。研究表明:对于气凝胶纳米技术材料,使用传热计算方法可以很好地计算气凝胶纳米技术绝热材料,使用适合纳米技术的传热计算方法可以很好地计算出气凝胶纳米技术绝热材料的等效热导率;纳米技术颗粒和气凝胶网以及连续的空间网络结构是气凝胶导热率极低的原因;材料的传热主要通过对流、辐射和传热来实现。因此可以从材料的传热路径中降低热导率。纳米技术颗粒和气凝胶网以及连续的空间网络结构是气凝胶导热率极低的原因;材料的传热主要通过对流、辐射和传热来实现。因此可以从材料的传热路径中降低热导率。纳米技术颗粒和气凝胶网以及连续的空间网络结构是气凝胶导热率极低的原因;材料的传热主要通过对流、辐射和传热来实现。因此可以从材料的传热路径中降低热导率。

更新日期:2021-09-10
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