美国太阳反射镜步进应力加速老化试验

为了应对降低聚光发电(CSP)成本带来的挑战,研发新型的低成本反射镜材料,包括金属聚合物反射镜。通过将太阳反射镜暴露在紫外光下,利用试验应用方法和统计推论技术,定量评估和改进太阳光反射镜在紫外光下与失效机制相关的使用寿命。将利用超加速环境系统评估由紫外暴露加速老化导致的多种性能退化模式。由于样品数量、试验条件、性能退化和失效模式等原因,试验结果可用于深入推导失效机制、关联物理参数、服役寿命和不确定性。在有必要利用高级方案和统计推论的复杂情况下,建议采用步进应力加速老化试验方法。

Step-stress Accelerated Degradation Testing for Solar Reflectors

To meet the challenge of reducing the cost of electricity generated with concentrating solar power ( CSP) , new low-cost reflector materials are being developed, including metalized polymer reflectors. By being exposed solar reflectors to UV-light, we used the application of testing methods and statistical inference techniques to quantitative evaluate and improve service lifetime of solar reflectors associated with failure mechanisms, which are exposed to UV-light. We will take advantage of the Ultra Accelerated Weathering System ( UAWS) to assess various degradation patterns caused by accelerated aging because of exposing to UV. On account of numbers of samples, test conditions, performance degradation, failure patterns and other reasons, the test results may be used to further deduce failure mechanisms, associated physical parameters, service lifetimes, and uncertainties. In necessary and complicated circumstances, we can use advanced planning and statistical inference, and propose step-stress accelerated degradation testing ( SSADT) methods.