Improved high temperature solar absorbers for use in Concentrating Solar Power central receiver applications.

Stechel, Ellen Beth ; Ambrosini, Andrea ; Hall, Aaron Christopher ; Lambert, Timothy L. ; Staiger, Chad Lynn ; Bencomo, Marlene

关键词: AIR;    CENTRAL RECEIVERS;    COATINGS;    ELECTRIC POWER;    ELECTRICITY;    ENERGY STORAGE;    OPERATING COST;    SOLAR ABSORBERS;    SOLAR RECEIVERS;    STABILITY;    SYNTHESIS;   

DOI  :  10.2172/1008136
RP-ID  :  SAND2010-7080
PID  :  OSTI ID: 1008136
Others  :  TRN: US201108%%142

学科分类：再生能源与代替技术

美国|英语

来源: SciTech Connect

【 摘 要 】

Concentrating solar power (CSP) systems use solar absorbers to convert the heat from sunlight to electric power. Increased operating temperatures are necessary to lower the cost of solar-generated electricity by improving efficiencies and reducing thermal energy storage costs. Durable new materials are needed to cope with operating temperatures >600 C. The current coating technology (Pyromark High Temperature paint) has a solar absorptance in excess of 0.95 but a thermal emittance greater than 0.8, which results in large thermal losses at high temperatures. In addition, because solar receivers operate in air, these coatings have long term stability issues that add to the operating costs of CSP facilities. Ideal absorbers must have high solar absorptance (>0.95) and low thermal emittance (<0.05) in the IR region, be stable in air, and be low-cost and readily manufacturable. We propose to utilize solution-based synthesis techniques to prepare intrinsic absorbers for use in central receiver applications.