在光热系统中,集热器作为光热转化的核心部件通过光谱选择性吸收涂层将太阳能转化为热能。因此,对选择性吸收涂层进行优化能够有效提高集热器的工作效率。选择性吸收涂层的主要吸收机理为本征吸收和干涉吸收,提升涂层吸收效率的策略有材料掺杂、等离激元、光学陷阱等。在集热器实际工作过程中,选择性吸收涂层的失效是影响其效率的主要因素,明确失效原因和寻找解决方案是进一步研究选择性吸收涂层的重点。综述了太阳能选择性吸收涂层的种类及原理,梳理了涂层的失效机制,总结了抑制涂层失效的方法。
In the photothermal system,the collector plays a crucial role in photothermal conversion by using solar selective absorbing coatings.Therefore,optimizing these coatings is essential for enhancing collector efficiency.The main absorption mechanisms of selective absorber coatings include intrinsic absorption and interference absorption,and various strategies such as material doping,equipartition excitations,and optical traps are employed to enhance the absorption efficiency.The failure of the selective absorption coating is the primary factor that affects the efficiency during practical operation.Clarifying the reasons of failure and finding solutions are the key to further research on selective absorption coatings.Firstly,the solar selective absorbing coatings types and the basic absorbing principle were introduced.Then,the failure mechanisms of solar selective absorption coatings was briefly sorted out.Finally,we summarized several methods for inhibiting coating failure.
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基金资助
北京市自然科学基金项目(3242015);北京建筑大学培育项目专项资金资助项目(X23041);北京建筑大学研究生创新项目(PG2023063)
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