Low-Cost Lightweight Thin Film Solar Concentrators
Low-Cost Lightweight Thin Film Solar Concentrators
复制标题
低成本轻质薄膜太阳能聚光器
DOI：
10.1115/es2014-6475
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
A. Kindler
中科院分区：
文献类型：
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作者：
G. Ganapathi;A. Palisoc;B. Nesmith;G. Greschik;K. Gidanian;A. Kindler
美国能源部 SunShot Initiative 资助了一项基于硬质泡沫的低成本聚光器技术开发计划，旨在实现 75 美元/平方米的安装成本目标，而当前成本为 200-250 美元/平方米。这种方法的成本降低主要集中在设计具有硬质泡沫中心、不锈钢面板和反射膜的镜模块。通过优化密度和尺寸来补偿泡沫机械强度较低的问题，以满足 27 英里/小时风速下 4 毫弧度 (mrad) 的指向精度要求。建造了两个 α 聚光器来验证反射镜模块的制造工艺，其中一个的精度达到 0.15 mrad RMS，而设计要求为 1 mrad RMS。为了了解面板的使用寿命可靠性，将 15 个 4 英寸见方的样品暴露在各种环境条件下，包括酸雨、鸟粪、热循环，最终结果表明反射率没有损失 95%。紫外线测试将在下一阶段进行。通过有限元分析和解析，三种机械结构选项涵盖了具有对角承载元件的大型多面定日镜、低至地面的小型单面定日镜以及优化的基于桁架的深层结构设计；结果表明，与其他选项相比，基于桁架的设计具有显着的成本效益（>2×）。在与供应商数据的分析中还考虑了其他元素，例如控件、执行器。对 10 平方米至 250 平方米范围内的定日镜进行了成本交易。结果表明，对于尺寸从 80 平方米到 130 平方米的定日镜来说，安装成本最低约为 113 美元/平方米。项目第二阶段将考虑其他成本节约方法。版权所有 © 2014 ASME
A low-cost rigid foam-based concentrator technology development program was funded by the DOE SunShot Initiative to meet installed cost goals of $75/m2 vs. current costs of $200–250/m2. The cost reduction in this approach focuses primarily on designing a mirror module with a rigid foam center with stainless steel facesheets and reflective film. The low mechanical strength of the foam is compensated by optimizing the densities and dimensions to meet pointing accuracy requirements of 4 milliradians (mrad) in 27mph winds. Two alpha concentrators were built to validate the mirror module manufacturing process and one of them was accurate to 0.15 mrad RMS vs. the design requirement of 1 mrad RMS. To understand the lifetime reliability of the panels, fifteen 4-inch square samples were exposed to various environmental conditions including acid rain, bird droppings, thermal cycling, and the final results indicated no loss in reflectivity of 95%. UV testing will be performed in the next phase. Three mechanical structure options covering the range of large multi-faceted heliostats with diagonal load carrying elements, small single facet heliostats low to the ground and optimized truss-based deep structure designs were analyzed with FEA and analytically; results indicated a significant cost benefit (>2×) for the truss-based design over the other options. Other elements such as the controls, actuators were also considered in th analysis with vendor data. Cost trades were performed for heliostats ranging from 10m2 to 250m2. The results indicated a broad installed cost minimum around $113/m2 for heliostat sizes ranging from 80 m2 to 130 m2. Additional cost saving approaches will be considered in Phase 2 of the project.Copyright © 2014 by ASME