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Effect of PCM cool roof system on the reduction in urban heat island phenomenon

机译：PCM冷顶系统对减少城市热岛现象的影响

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摘要

The urban heat island (UHI) phenomenon incurs various problems for human health as fine dust and hazardous pollutants are not ventilated well in urban areas. For example, downtown areas had a higher temperature than that of suburban regions. The purpose of the present study is to derive the reduction effect on the UHI phenomenon by applying phase-change material (PCM) to building roofs as a foundational study to reduce the UHI phenomenon. In the present study, an effect of reduction in surface temperature was verified through mock-up performance test on a PCM cool roof system manufactured by combining a PCM and radiation hardened wood (wood-plastic composite), and analysis on temperature distribution simulation was conducted by utilizing the mock-up test results to verify the temperature reduction in the canopy layer and roof surface. The study result showed that a temperature was decreased by 6.8 degrees C on average when the PCM cool roof system was applied. The result of the temperature distribution simulation based on the above experimental data verified that a temperature in the urban canopy layer in the commercial zone was reduced by 7.8 degrees C in summer and 113 degrees C in winter, and that in the residential zone was decreased by 6.4 degrees C in summer and 10.5 degrees C in winter, respectively. (C) 2017 Elsevier Ltd. All rights reserved.
机译：由于城市中的细粉尘和有害污染物不能很好地通风，城市热岛现象会给人类健康带来各种问题。例如，市中心地区的温度高于郊区地区。本研究的目的是通过将相变材料（PCM）应用于建筑物屋顶来得出对UHI现象的减少效果，作为减少UHI现象的基础研究。在本研究中，通过对PCM与辐射硬化木材（木塑复合材料）组合制成的PCM凉棚系统进行了模拟性能测试，验证了表面温度降低的效果，并进行了温度分布模拟分析通过利用模型测试结果来验证冠层和屋顶表面的温度降低。研究结果表明，当使用PCM冷却屋顶系统时，温度平均降低6.8摄氏度。根据上述实验数据进行的温度分布模拟结果证明，商业区城市冠层的温度在夏季降低了7.8℃，在冬季降低了113℃，而住宅区的温度则降低了70℃。夏季为6.4摄氏度，冬季为10.5摄氏度。 （C）2017 Elsevier Ltd.保留所有权利。

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