Abstract

Solar energy is the most renewable energy widely spread on the globe with several applications such as power generation and thermal comfort amelioration inside buildings. In the present study, one of the multiple solar energy techniques is discussed. New, simple and low-cost solar chimney (SC) made of polyvinyl chloride (PVC) tube with internal PVC obstacles was investigated experimentally. Heat transfer of air passing through the new device were studied and results show SC ability of increasing air temperature from 25°C to 48°C and reducing relative humidity from 40% to 10%. Internal PVC obstacles were responsible for increasing outlet air temperature by more than 7°C in 63% of compared cases with simple PVC tube SC without internal obstacles. In the last part of the study, the new system was compared with three conventional square glazed SCs found in the literature. The new system outlet’s air temperature was higher by 12°C than the first two models and 2°C with the third model, which increase the kinetic energy of air leaving the building and increase the internal airflow, ameliorating the air quality and reducing the age of air inside the dwellings. Obtained results encourage building designers and people to widely use SCs.

中文翻译：

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带有内部PVC障碍物的圆柱形垂直太阳能烟囱的实验研究的热分析

摘要

太阳能是全球广泛使用的最可再生的能源，它在建筑物内用于发电和改善热舒适性等多种应用。在本研究中，讨论了多种太阳能技术之一。实验研究了由聚氯乙烯（PVC）管制成的新型，简单且低成本的带有PVC内部障碍物的太阳能烟囱（SC）。研究了通过新设备的空气的热传递，结果表明SC能够将空气温度从25°C升高到48°C，并将相对湿度从40％降低到10％。在没有内部障碍物的简单PVC管SC的比较案例中，内部PVC障碍物导致出口空气温度升高了63％以上，占63％。在研究的最后一部分，将该新系统与文献中发现的三种传统的方形釉面SC进行了比较。新系统出口的空气温度比前两个模型高出12°C，第三种模型高出2°C，这增加了离开建筑物的空气的动能并增加了内部气流，从而改善了空气质量并降低了使用寿命房屋内的空气。获得的结果鼓励建筑设计师和人们广泛使用SC。