采用基于计算流体力学（CFD）的建模方法，对金属建筑屋顶隔热组件的传热进行了实验研究。实验研究使用2.445—3.054 m（96.25—120.25 in.）的压力计进行立式接缝车顶（SSR）总成的测试框架。SSR配置包括安装NAIMA（北美绝缘制造商协会）202-96 R19面玻璃纤维绝缘层，并垂直于0.203 m（8 in.）0.0667米（2.625英寸）的高金属屋顶檩条法兰。两条檩条在试验架中心间距为1.524 m（5 ft），在计量区域形成三个空腔。檩条通过立缝板夹连接到金属屋顶板上，立缝板夹的设计长度约为0.0349米（1.375英寸）檩条顶部和屋顶板底部之间的空间。该空间包含压缩玻璃纤维隔热层和0。 0254米（1英寸）高0.0762米（3英寸）宽挤压聚苯乙烯（XPS）泡沫块绝缘。泡沫块安装在玻璃纤维隔热层顶部和屋顶板之间。在热箱装置中测量通过测试架的热流，测试架的隔热侧朝向空气的平均温度保持在311.2 K（100.5°F），屋顶侧朝向空气的平均温度保持在283.4 K（50.4°F）。数学建模涉及固态继电器组件中稳态、三维自然对流和传热问题的描述。该模型考虑了相关的几何复杂性，并考虑了玻璃纤维绝缘热导率随密度（即压缩厚度）的变化。利用CFD软件Fluent对控制输运方程和边界条件进行了数值求解。 模型预测的总传热系数（U系数）与基于实验测量值的计算结果非常吻合。当考虑各种空气间隙中的自然对流时，模型预测的U系数为0.369 W/m2·K（0.065 Btu/ft2·h·F），当假设空气静止时，预测的U系数为0.358 W/m2·K（0.063 Btu/ft2·h·F）。测量值为0.349 W/m2·K（0.061 Btu/ft2·h·F）。单位:双引文:ASHRAE交易，第116卷，第。2010年奥兰多

Heat transfer in a roof insulation assembly used in metal buildings was investigated experimentally and using computational fluid dynamics (CFD) based modeling. The experimental study was performed using a 2.445 × 3.054 m (96.25 × 120.25 in.) test frame for a Standing Seam Roof (SSR) assembly. The SSR configuration involved installing NAIMA (North American Insulation Manufacturers Association) 202-96 R19 faced fiberglass insulation over and perpendicular to 0.203 m (8 in.) high metal roof purlins with 0.0667 m (2.625 in.) flanges. Two purlins were spaced 1.524 m (5 ft) on center in the test frame creating three cavities in the metering area. The purlins were connected to metal roof panels using standing seam panel clips designed to create approximately 0.0349 m (1.375 in.) of space between the top of the purlin and the bottom of the roof panel. This space contained both compressed fiberglass insulation and 0.0254 m (1 in.) high by 0.0762 m (3 in.) wide extruded polystyrene (XPS) foam block insulation. The foam blocks were installed between the top of the fiberglass insulation layer and the roof panel.Heat flow through the test frame was measured in a hotbox set-up with the insulation side of the test frame facing air kept at an average temperature of 311.2 K (100.5°F) and the roof side facing air maintained at an average temperature of 283.4 K (50.4°F). Mathematical modeling involved the formulation of the steady-state, three-dimensional natural convection and heat transfer problem in the SSR assembly. The model accounted for the relevant geometrical complexities and allowed for variations in fiberglass insulation thermal conductivity with density (i.e., compressed thickness). The governing transport equations and the boundary conditions were solved numerically using CFD software Fluent. Excellent agreement was observed between model predictions of the overall heat transfer coefficient (U-factor) and calculations based on experimentally measured values. The model predicted U-factor was 0.369 W/m2·K (0.065 Btu/ft2·h·°F) when natural convection in various air gaps was accounted for and 0.358 W/m2·K (0.063 Btu/ft2·h·°F) when the air was assumed to be stagnant. The measured value was 0.349 W/m2·K (0.061 Btu/ft2·h·°F).Units: Dual