点、线耦合聚焦复合菲涅尔反射式太阳能集热转换机理研究

项目名称： 点、线耦合聚焦复合菲涅尔反射式太阳能集热转换机理研究

项目编号： No.51276112

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 能源与动力工程

项目作者： 代彦军

作者单位： 上海交通大学

项目金额： 80万元

中文摘要： 本项目针对一种点、线耦合聚焦复合菲涅尔反射式太阳能集热方法进行研究，研究内容包括揭示点、线耦合聚焦复合菲涅尔反射式太阳能集热机理；建立基于热迁移因子和效率因子的集热性能分析理论，将集热镜面，镜场分布，二次反射镜面参数以及吸收器结构和运行参数统一起来，获得各参数之间的定量影响关系；研究能量在该集热方式下高效聚集及光热转换过程动态变化规律，分析若干集热单元联合使用条件下，集热单元分布对集热过程的影响；研究一次镜场与二次反射镜面的耦合匹配关系，实现聚光光斑的有效控制等。项目的创新点在于能够发展一种低成本、高可靠性、高效率的二次反射式太阳能光热转换新方法，突破传统线聚焦菲涅尔反射集热器集热效率不高、聚焦比低的限制，为将菲涅尔反射集热方法用于塔式太阳能热发电聚焦集热系统提供一种新的思路。

中文关键词： 点聚焦；菲涅尔反射镜；太阳能；二次反射系统；光热耦合模型

英文摘要： This project involves the fundamental research on one kind of point/linear focus combined Fresnel reflective solar collection method. The research work includes: to study the mechanisms of the point/linear focus combined Fresnel reflective solar conversion; to develop an analytical theory based on heat removal factor and thermal efficiency factor, considering the reflector, the distribution of the mirror module, 2nd reflector configuration, as well as the solar absorber; to obtain the optimal operation and configuration parameters; to study the dynamic performance of this solar energy conversion process, and identify the influence of the mirror field; to acquire the inherent relation of the first and the 2nd reflectors, and realize the uniform distribution of sun light focus area. The novel point of this project is to find a novel concentrated solar energy conversion method based on Fresnel optical reflection, and approach the purpose of low cost, high reliability and high efficiency. The work in this project is expected to break through the limits of relatively lower concentration ratio, and higher thermal losses for the conventional line- focus Fresnal solar collector, and pave a way for using fresnal reflection in solar thermal power generation, etc.

英文关键词： Point-focus；Fresnel Reflector；solar energy；beam down solar concentration system；solar-thermal coupling model