包含相变材料的多功能立面解决方案的热性能:实验和数值分析
C Amaral1,2, F Gomez3, M Moreira1,2
1TEMA-Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal.
这项研究开发了一种新的外墙面板,配有相变材料 (PCM),用于改进热调节. 增强PCM的面板显著提高了建筑的能源效率和热舒适度.
科学领域:
- 建筑科学和材料工程 建筑科学和材料工程
- 可持续能源技术 可持续能源技术
- 热力工程是热力工程中的一个.
背景情况:
- 传统的立面面板缺乏动态热调节能力.
- 整合相变材料 (PCM) 为被动热能存储提供了一个有前途的解决方案.
- 优化PCM在建筑元件中的集成对于提高能源效率至关重要.
研究的目的:
- 开发和分析一种新的多功能立面面板,将相变材料 (PCM) 纳入泡层中.
- 通过实验和数值评估PCM增强的立面面板的热性能和节能潜力.
- 确定最佳的PCM分数和操作条件,以最大限度地提高热舒适度和面板效率.
主要方法:
- 使用热箱热流量计进行实验分析,以在稳定状态条件下确定热传导率 (U值).
- 使用Ansys Fluent进行数值模拟,对实验数据进行校准和验证 (R2 = 0.9674).
- 使用降解因子 (f) 分析热性能,评估温度降低和振幅减弱.
主要成果:
- 即使是小的PCM分数也表明了室内温度幅度的降低.
- 面板效率和最佳操作区域大小随着PCM分数的增加而增加.
- 基于边界条件,面板效率提高近50%的潜力.
结论:
- 带有PCM的多功能立面面板显示了改善室内热舒适度的巨大潜力.
- PCM集成有效调节室内空间温度,减少对主动HVAC系统的依赖.
- 在平均输入温度为20°C和室温在18-20°C之间实现最佳性能.
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