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A perspective on the effect of climate and local environmental variables on the performance of attic radiant barriers in the United States

机译：气候和当地环境变量对美国阁楼辐射屏障性能的影响透视

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This paper offers a perspective on how climate and local environmental variables affect the performance of attic radiant barriers across the United States. Transient heat and mass transfer simulations were performed on a vented triangular attic with insulation level of 3.5 m~2K/W (R-19) and the results were based on integrated hourly ceiling heat fluxes over 3-month periods during the cooling season. The ceiling heat transfer percent reductions ranged from 36.8% in the Tropical Savanna climate to 2.3% in the Mediterranean climate. Peak-hour percent reductions in ceiling heat flux ranged from almost 100% in the Marine West Coast climate to 23% in the Desert climate. The results suggested that local ambient air temperature, humidity, cloud cover index, and altitude had first-order effects. The amount of local solar radiation had no effect on the performance of the systems.
机译：本文提供了关于气候和当地环境变量如何影响全美阁楼辐射屏障性能的观点。在隔热水平为3.5 m〜2K / W（R-19）的通风三角形阁楼上进行了瞬态传热和传质模拟，结果基于冷却季节3个月内每小时的累计天花板热通量。天花板传热百分比的降低幅度从热带萨凡纳气候的36.8％到地中海气候的2.3％。高峰小时的峰值热通量减少幅度从西海岸海洋气候的近100％到沙漠气候的23％不等。结果表明，当地环境空气温度，湿度，云量指数和海拔高度具有一级影响。局部太阳辐射的量对系统的性能没有影响。

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