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Advances in Concentrating Solar Power Collectors: Mirrors and Solar-Selective Coatings

机译：集中太阳能收集器的进展：镜子和太阳能选择性涂料

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Concentrating solar power (CSP) technologies use large mirrors to collect sunlight to convert thermal energy to electricity. Opportunities are emerging for deploying CSP systems worldwide and in the Southwest United States. However, the cost of solar-collector technologies needs to be halved to achieve the long-term U.S. Department of Energy (DOE) Solar Program goal of developing parabolic trough power plants, power towers, and dish/Stirling systems that are cost-competitive with conventional fossilfuel power technologies. For mirrors, this cost reduction is accomplished through technology advances by moving from heavy glass mirror reflectors to lightweight reflectors such as thin-glass, polymer, and front-surface mirrors that include surface coatings to reduce soiling. Increasing the operating temperature of the parabolic-trough solar fields from 400 deg C to >450 deg C will increase their efficiency and reduce the cost of electricity. For receivers, current coatings do not have the stability and performance necessary to move to higher operating temperatures. The objective is to develop new, more-efficient selective coatings with both high solar absorptance (> 0.96) and low thermal emittance (< 0.07) that are thermally stable above 450 deg C, ideally in air, with improved durability and manufacturability, and reduced cost. The production process and performance of solar reflectors and the progress toward developing a durable, high-temperature solar-selective coating for parabolic-trough receiver tubes will be discussed.
机译：集中的太阳能（CSP）技术使用大型镜子来收集阳光以将热能转换为电力。为全球和西南部部署CSP系统，正在出现机会。然而，太阳能收集器技术的成本需要减少，以实现长期美国能源部（DOE）太阳能节目的目标开发抛物线槽发电厂，动力塔和斯特林系统，这是具有成本竞争力的传统的化石电力技术。对于镜子，通过从重型玻璃镜反射器移动到诸如薄玻璃，聚合物和前表面镜的轻质反射器，包括表面涂层的重量反射器来实现这种成本的降低，该成本通过技术进步。增加抛物线槽太阳能场的工作温度从400℃至> 450℃下C将提高其效率并降低电力成本。对于接收器，电流涂层没有必要的稳定性和性能来移动到更高的操作温度。目的是开发具有高太阳能吸收率（> 0.96）和低热发射（<0.07）的新的更高效的选择性涂层，其在450℃下热稳定，理想地在空气中，具有改善的耐用性和可制造性，并降低成本。将讨论太阳能反射器的生产过程和性能以及开发耐用，高温太阳能选择性涂层的抛物面 - 槽接收管的进展。

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