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Design optimization and optical characterization of a high temperature solar receiver.

机译：高温太阳能接收器的设计优化和光学特性。

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摘要

Concentrated solar power (CSP) is a fast forwarding technology in power generation sector because of its' competitive price, abundance in nature and the most important fact is its' energy storage capability. Among the four types of available CSP technology, central receiver has more potential concerning with high temperature, power block efficiency and levelized cost of energy (LCOE). Other than conventional type of receiver design, the concept of this work is very particular in a sense of its design novelty. National Renewable Energy Laboratory (NREL) come up with a new concept of high temperature solar receiver called near black body (NBB) receiver. This receiver design requires high specular reflective surface in its' front section at operating temperature 150C. High specular reflective surface refers to mirror finished surface. However, this specular reflective surface application is for high temperature solar receiver, the surface needs to be durable from thermal cycling, oxidation and environmental effect. This mirror finished specular surface helps to penetrate the sunlight inside the hollow tube and hence increase receiver's efficiency. But at such operating temperature and environmental condition, optical properties degradation rate is high. So to protect this mirror surface a thin layer of SiO2 has been deposited by sol-gel method on top of electroplated silver coating. To obtain a rigid thin film structure, sol-gel procedure has been tested extensively by varying most dominant sol-gel parameters. Endurance test has been performed in the furnace at 150C for 1000 hours.
机译：集中式太阳能（CSP）由于其具有竞争力的价格，丰富的自然资源以及最重要的事实是其储能能力，是发电行业中的一种快速转发技术。在四种可用的CSP技术中，中央接收器在高温，功率块效率和平均能源成本（LCOE）方面具有更大的潜力。除了传统类型的接收器设计以外，就其设计新颖性而言，这项工作的概念非常特殊。美国国家可再生能源实验室（NREL）提出了一种高温太阳能接收器的新概念，称为近黑体（NBB）接收器。这种接收器设计在工作温度为150C时，其前部需要高镜面反射表面。高镜面反射面是指镜面精加工的表面。然而，这种镜面反射表面的应用是用于高温太阳能接收器，该表面需要在热循环，氧化和环境影响方面具有耐用性。这种镜面镜面的镜面有助于穿透中空管内的阳光，从而提高接收器的效率。但是在这样的工作温度和环境条件下，光学性能退化率很高。因此，为了保护该镜面，已通过溶胶-凝胶法在电镀银涂层的顶部沉积了一层SiO2薄层。为了获得刚性的薄膜结构，已经通过改变最主要的溶胶-凝胶参数对溶胶-凝胶方法进行了广泛的测试。在150℃的炉子中进行了1000小时的耐久试验。

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  • 作者

    Afrin, Samia.;

  • 作者单位

    The University of Texas at El Paso.;

  • 授予单位 The University of Texas at El Paso.;
  • 学科 Engineering.;Environmental engineering.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 83 p.
  • 总页数 83
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 语言学;
  • 关键词

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