常温耐高温耐磨选择性太阳能吸收器
High-temperature and Abrasion Resistant Selective Solar Absorber under Ambient Environment
摘要：
高性能的选择性太阳能吸收器（SSA）是聚光太阳能发电系统的关键。光学超材料是一种很有前途的增强光子选择性吸收的策略，然而，耐高温（> 500 C）仍然是其实际应用的主要挑战之一。这里，一个多层超材料系统（Al 2 O3/W/SiO2/W）基于金属-绝缘体-金属（MIM）共振效应的复合材料具有92%以上的高太阳吸收率、6%以下的低热发射率损耗和显著的耐高温性能：已经证明，在高达500 ℃的环境下热退火1小时后，光学性能保持93.6%，在400 ℃热循环96小时后，其转化率为94.1%，这也通过微观形貌表征得到了证实。所制备的SSA的光谱选择性是角度无关的和偏振不敏感的。室外测试表明，峰值温度上升（193.5 ℃），可以实现与非集中的太阳辐照和表面耐磨性测试结果，SSA具有强大的抗磨损攻击的工程应用。
英文摘要：
Selective solar absorbers (SSAs) with high performance are the key to concentrated solar power systems. Optical metamaterials are emerging as a promising strategy to enhance selective photon absorption, however, the high-temperature resistance (>500C) remains as one of the main challenges for their practical applications. Here, a multilayered metamaterial system (Al2O3/W/SiO2/W) based on metal-insulator-metal (MIM) resonance effect has been demonstrated with high solar absorptance over 92%, low thermal emittance loss below 6%, and significant high-temperature resistance: it has been proved that the optical performance remains 93.6% after 1-hour thermal annealing under ambient environment up to 500C, and 94.1% after 96-hour thermal cycle test at 400C, which is also confirmed by the microscopic morphology characterization. The spectral selectivity of fabricated SSAs is angular independent and polarization insensitive. Outdoor tests demonstrate that a peak temperature rise (193.5C) can be achieved with unconcentrated solar irradiance and surface abrasion resistance test yields that SSAs have a robust resistance to abrasion attack for engineering applications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
