隔热涂层降低建筑顶层空调动态负荷的数值模拟

NUMERICAL SIMULATION ON THE DYNAMIC AIR-CONDITIONING LOAD OF THE TOP FLOOR BUILDING WITH THERMAL INSULATION COATINGS

建立了屋顶和南外墙涂敷隔热涂层的房间的非稳态传热模型。利用该模型探讨了隔热涂层对房间空调动态负荷、日制冷量和室内热环境的影响,并采用北京、合肥、深圳3地夏季月平均气象数据,对当地建筑使用隔热涂层的节能效果进行了评估。研究发现:给建筑顶层外表面加装隔热涂层可显著降低房间空调负荷和日制冷量;整个夏季的空调平均日制冷量随地区的不同可降低40.0%～60.1%;隔热涂层还能显著降低房间外表面和内表面(尤其是天花板)温度的峰值和波幅,在节能的同时可改善室内热环境。

A transient model was constructed to simulate the thermal behavior of a room with coated roof and south wall. Using this model with the summer month-average meteorologic data of Beijing, Hefei and Shenzhen, the air-conditioning dynamic load, diurnal cooling consumption and indoor thermal environment of a standard room were simulated. And the effect of TICs on local building energy conservation was evaluated. The following results were achieved： By coating the outer surfaces of the top floor building with TICs, the cooling load and diurnal cooling consumption could be reduced remarkably; the whole summer＇s average air-conditioning diurnal cooling consumption could be reduced by 40.0% - 60. 1%, the exact value depending on the region; by using TICs, the peak value and amplitude of outer and inner surface temperatures （especially that of the ceiling） could be reduced markedly.