Low-emissivity Transpired Solar Collectors
Low-emissivity Transpired Solar Collectors
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低发射率蒸发式太阳能集热器
DOI：
10.1016/j.egypro.2016.06.171
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
J. Blower
中科院分区：
文献类型：
--
作者：
R. Hall;J. Blower
蒸发式太阳能集热器 (TSC) 在世界各地用于预热建筑物中的通风空气和农业干燥。当前一代的 TSC 倾向于使用预加工钢作为穿孔吸收器和涂层，这些钢主要不是为太阳能热应用而设计的。这意味着虽然它们具有相对较高的吸收率，但它们也具有较高的发射率，这会导致在低流速下运行时产生较高的辐射损失。许多研究表明，开发用于 TSC 的低发射率涂层可以提高当前应用范围的节能效果，并使其能够用于太阳能冷却。本文报道了一种用于 TSC 的新型长寿命（设计寿命超过 50 年）低发射率（小于 0.30）涂层的开发，该涂层将使它们在低流量运行时实现更高的空气温升。此外，新型低发射率涂层在建筑上具有吸引力的外观可能会增加 TSC 对建筑师的吸引力，从而扩大其可结合的建筑物范围。
Transpired Solar Collectors (TSCs) are used around the world for pre-heating of ventilation air in buildings and agricultural drying. The current generation of TSCs tend to use pre-finished steel for the perforated absorber and coatings which were not principally designed for solar thermal applications. This means that while they have a relatively high absorptivity, they also have a high-emissivity, which results in high radiative losses when operating at low flow rates. A number of studies have shown that development of a low-emissivity coating for TSCs could lead to increased energy savings for the current range of applications and enable their use in solar cooling. This paper reports on the development of a new long-life (design life of over 50 years) low-emissivity (less than 0.30) coating for TSCs that will enable them to achieve a higher air temperature rise when operating at a low flow rate. In addition, the architecturally attractive appearance of the new low-emissivity coating may increase the appeal of TSCs to architects, thereby broadening the range of buildings with which they may be incorporated.