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Using Micro-Scale and Solid Material Data for Modelling Heat Transfer in Stone Wool Composites Under Heat Exposures
Fire Technology ( IF 3.4 ) Pub Date : 2021-04-26 , DOI: 10.1007/s10694-021-01122-0
B. Andres , K. Livkiss , A. Bhargava , P. van Hees

Modelling capabilities have drastically improved in the last decade. However, in most of the cases the fire response of building elements is predicted by fitting input material properties to the models in order to match test data. This paper presents models developed to predict the unexposed side temperature of stone wool layered composites with stainless steel or gypsum claddings exposed to severe heat conditions. The suitability of material thermal properties from literature and reaction kinetic parameters obtained at bench scale (e.g. thermogravimetric analysis, bomb calorimeter, slug test) to model composites at different heat exposures is studied. Modelling efforts include: (1) the combustion of the organic content of the wool, (2) diffusion term to account for the passage of hot air through the wool, (3) calcination reactions in the gypsum plasterboard, (4) energy released by burning of the paper lining of gypsum plasterboard. The models are compared against experimental data. Results show that material thermal properties of gypsum plasterboard and stone wool retrieved from the literature and obtained at a bench scale provide accurate model predictions under different heat exposures. Furthermore, reactions schemes for the dehydration of gypsum plasterboard and organic content combustion in the wool also provide good modelling results. Further analysis is necessary to understand the environmental conditions inside the layered composites in fire exposures in order to achieve better modelling predictions.



中文翻译:

使用微型和固体材料数据模拟热暴露下石羊毛复合材料的传热

在过去的十年中,建模能力得到了极大的提高。但是,在大多数情况下,建筑材料的火灾响应是通过将输入材料属性拟合到模型中来预测的,从而与测试数据相匹配。本文介绍了开发的模型,这些模型可预测暴露于严酷高温条件下的带有不锈钢或石膏覆层的石棉层状复合材料的未暴露侧面温度。研究了从文献中获得的材料热性质以及在工作台上获得的反应动力学参数(例如热重分析,炸弹量热仪,弹头试验)在不同热暴露下对复合材料进行建模的适用性。建模工作包括:(1)燃烧羊毛中的有机物,(2)扩散项以说明热空气通过羊毛的过程,(3)石膏灰泥板中的煅烧反应,(4)石膏灰泥板纸衬板燃烧释放的能量。将模型与实验数据进行比较。结果表明,从文献中检索并以台式规模获得的石膏灰泥板和石棉的材料热性能可在不同的热暴露条件下提供准确的模型预测。此外,用于石膏石膏板的脱水和羊毛中有机物燃烧的反应方案也提供了良好的建模结果。为了获得更好的建模预测,有必要进行进一步分析以了解分层复合材料内部在火灾中的环境条件。结果表明,从文献中检索并以台式规模获得的石膏灰泥板和石棉的材料热性能可在不同的热暴露条件下提供准确的模型预测。此外,用于石膏石膏板的脱水和羊毛中有机物燃烧的反应方案也提供了良好的建模结果。为了获得更好的建模预测,有必要进行进一步分析以了解分层复合材料内部在火灾中的环境条件。结果表明,从文献中检索并以台式规模获得的石膏灰泥板和石棉的材料热性能可在不同的热暴露条件下提供准确的模型预测。此外,用于石膏石膏板的脱水和羊毛中有机物燃烧的反应方案也提供了良好的建模结果。为了获得更好的建模预测,有必要进行进一步分析以了解分层复合材料内部在火灾中的环境条件。石膏石膏板脱水和羊毛中有机物燃烧的反应方案也提供了良好的建模结果。为了获得更好的建模预测,有必要进行进一步分析以了解分层复合材料内部在火灾中的环境条件。石膏石膏板脱水和羊毛中有机物燃烧的反应方案也提供了良好的建模结果。为了获得更好的建模预测,有必要进行进一步分析以了解分层复合材料内部在火灾中的环境条件。

更新日期:2021-04-26
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