超临界CO2腔体盘管吸热器光热特性优化与试验研究

Concentrating solar power (CSP) is regarded as one of most promising substitutes of traditional fossil energy in advantage of its high system security, long operating lifetime and excellent environmental compatibility. The key point in CSP technology is the efficient energy utilization and conversion from solar power to the electricity. The receiver plays an important role in the energy conversion process. In various of receivers, cavity receiver gains extensive attention of scientists around the world due to its high conversion efficiency and strong reliability. Supercritical carbon dioxide(S-CO2) is becoming a significant solvent due to its low toxicity and environmental impact. The relatively low temperature of the process and the stability of CO2 also allows most compounds to be extracted with little damage or denaturing. Therefore, this project focus on optimization of solar-heat characteristics of solar cavity receiver with SO2 as working fluid with experimental investigation. The research of this project also includes high precision modeling of heat transfer characteristics. The scientific phenomenon could be revealed with the aids of this project are about: effects of geometric and environmental parameters on heat transfer characteristics of S-CO2 cavity receiver, and mechanisms of solar-heat coupling inside the S-CO2 cavity receiver. The experience summarized through project implement will positively develop CSP technology in China, and will accomplish the theoretical system of clean energy research and development.

太阳能热利用发电技术具有安全性高、使用寿命长、环境兼容性好等优点，可用于替代常规能源。能量高效转化利用是太阳能热利用发电技术之关键。吸热器在能量转化过程中起到举足轻重的作用。众多吸热器中，转化效率高、运行可靠性强的腔体盘管式吸热器受到国内外学者广泛关注。超临界CO2在临界点密度大、压缩功小、热稳定性佳，适于作为腔体盘管吸热器的工质。因此，本项目以实现太阳能高温高效利用为目标，开展超临界CO2太阳能腔体吸热器热利用特性优化研究。本项目研究内容包括:超临界CO2吸热器高精度传热模型构建，吸热器光热耦合特性优化设计，超临界CO2吸热器样机试制与试验测试。通过研究本项目将解决的科学问题包括: 结构参数/环境因素对超临界CO2太阳能腔体吸热器传热特性影响机理；超临界CO2太阳能腔体吸热器光热耦合机制。通过总结项目经验，将积极推动我国太阳能热利用关键技术发展，完善新能源技术研发的理论体系。

太阳能热利用发电技术具有安全性高、使用寿命长、环境兼容性好等优点，可用于替代常 规能源。能量高效转化利用是太阳能热利用发电技术之关键。吸热器在能量转化过程中起到举 足轻重的作用。众多吸热器中，转化效率高、运行可靠性强的腔体盘管式吸热器受到国内外学 者广泛关注。超临界CO2在临界点密度大、压缩功小、热稳定性佳，适于作为腔体盘管吸热器 的工质。因此，本项目以实现太阳能高温高效利用为目标，开展超临界CO2太阳能腔体吸热器 热利用特性优化研究。本项目研究内容包括:超临界CO2吸热器高精度传热模型构建，吸热器光 热耦合特性优化设计，超临界CO2吸热器样机试制与试验测试。通过研究本项目将解决的科学 问题包括: 结构参数/环境因素对超临界CO2太阳能腔体吸热器传热特性影响机理；超临界CO2 太阳能腔体吸热器光热耦合机制。通过总结项目经验，将积极推动我国太阳能热利用关键技术 发展，完善新能源技术研发的理论体系。