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绝热保温材料性能的选用参数
作者:admin 来源:本站 发布时间:2016-09-28 13:34:54 浏览次数:319
绝热材料一方面满足了建筑空间或热工设备的热环境,另一方面也节约了能源。因此,有些国家将绝热材料看作是继煤炭、石油、天然气、核能之后的“第五大能源”。
Thermal insulation material on the one hand to meet the thermal environment of the building space or thermal equipment, on the other hand, it also saves energy. Therefore, some countries will be the insulation material as following the coal, oil, natural gas, nuclear energy, the fifth major energy".
保温性能优劣主要通过导热系数反映。
The thermal insulation performance is mainly reflected by the thermal conductivity coefficient.
2、导热系数 λ = W/(m.k)。
2, the coefficient of thermal conductivity = W/ (m.k).
3、导热系数表征材料在稳定传热状况下的导热能力。其导热系数值越小越好。
3, the thermal conductivity of the material to characterize the heat transfer capacity of the material under the condition of steady heat transfer. The thermal conductivity of the smaller the better.
4、λ值0.20w/(m.k)作为保温材料和非保温材料的分界值。λ>0.20w/(m.k)的材料一般不应作为保温材料使用。
4, the value of 0.20w/ (m.k) as a thermal insulation material and non - thermal insulation materials, the boundary value. >0.20w/ (m.k) materials should not be used as insulation materials.
绝热保温材料的选用要点:
Selection of thermal insulation materials:
绝热材料在建筑中常见的应用类型及设计选用应符合GB/T 17369-1998《建筑绝热材料的应用类型和基本要求》的规定。
Insulation materials in the construction of the common application types and design selection should be consistent with the 17369-1998 GB/T "building insulation materials, the application type and basic requirements" of the provisions.
选用时除应考虑材料的导热系数(导热系数不大于0.175W/(m.K))外,还应考虑材料的吸水率、燃烧性能、强度等指标。不同绝热材料的性能特点见相应的分类指南。
In addition to the thermal conductivity of materials should be considered (not more than 0.175W/ (m.K)), it should also consider the material's water absorption, combustion performance, strength and other indicators. A classification guide for the performance characteristics of different thermal insulation materials.
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