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结构形状的进化规律和热传递性能的热绝缘系统的发展规律
Shuang-Xi Zhou1, Jian-Xin Li1, Shu-Feng Bao1
1School of Civil and Engineering Management, Guangzhou Maritime University, Guangzhou 510725, China.
Materials (Basel, Switzerland)
|September 28, 2023
概括
这项研究通过建模孔隙性和分析导热性来研究建筑热绝缘. COMSOL模拟准确地预测了材料的导热性,超过了理论模型的性能.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 节能 节能 节能 节能 节能
背景情况:
- 建筑的隔热对于节能和实现碳中和目标至关重要.
- 导热率是评估材料绝缘性能的一个关键指标.
- 了解多孔度对导热率的影响对于开发高效的绝缘材料至关重要.
研究的目的:
- 为了研究多孔度对材料导热性的影响.
- 为了比较不同的理论模型和数值模拟来预测导热率.
- 分析间隙宽度对屋顶结构中热传递的影响.
主要方法:
- 在MATLAB中建立了一个随机分布模型.
- 使用COMSOL有限元软件和经典理论公式进行比较分析.
- 模拟的热传递在制造的屋顶结构与不同的间隙宽度.
主要成果:
- 科姆索尔模拟显示与测量热导率有很好的一致性 (误差<5%),而理论模型存在显著差异 (误差>29%).
- 与COMSOL相比,齐默尔曼和坎贝尔-艾伦模型产生了不同的导热值.
- 传热系数随着间隙宽度增加到60毫米,线性增加,然后由于热桥梁而减慢.
结论:
- COMSOL有限元分析是一种可靠的方法,用于预测复合材料的导热率.
- 优化绝缘系统的间隙宽度对于减轻热桥效应和提高性能至关重要.
- 这些发现支持开发改进的工厂准备的隔热系统.
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