| 摘要: |
| 为深入研究塔式光热电站吸热器壁面的热流密度分布,基于赤道聚光策略和基本光路原理,利用光学仿真分析软件SolTrace对西班牙Gemasolar塔式光热电站系统进行几何与光学建模. 通过结果敛散性判断,确定采用5 000 000条射线进行模拟研究；模拟结果与文献研究结果符合良好,证明模型准确可靠. 采用夏至日设计点标准状况下的太阳光入射辐射,通过射线追踪的方法,模拟获得外露管式吸热器壁面上的热流密度分布,发现不同吸热管壁面接收的太阳辐射热流密度变化规律与定日镜场环形分布方式有关；单根吸热管时壁面热流密度分布不均匀. 分析冬至日午时吸热管的热流密度分布,对比吸热管壁面热流分布的模拟结果与相应的近似高斯分布,发现近似处理与模拟结果差异较大. 研究结果表明,对于塔式吸热器壁面热流分布,采用SolTrace仿真分析比用近似高斯分布更具有实际指导意义. |
| 关键词: 太阳能 塔式光热电站 SolTrace 热流分布 近似高斯分布 |
| DOI：10.11918/201911048 |
| 分类号:TK513 |
| 文献标识码:A |
| 基金项目: |
|
| Heat flux distribution on wall of receiver in a solar power tower plant |
|
YING Zhaoping1,HE Boshu1,2
|
|
(1. Institute of Combustion and Thermal Systems, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. School of Mechanical and Power Engineering, Haibin College of Beijing Jiaotong University, Huanghua 061199, Hebei ,China)
|
| Abstract: |
| To enhance the knowledge of non-uniform heat flux distribution of receiver in a solar power tower plant, an optical simulation software, SolTrace, was used to model the Gemasolar plant system geometrically and optically, and the wall heat flux distribution of the receiver was obtained. According to the convergence judgment, 5 000 000 rays were used for follow-up study. The accuracy of the model was verified by comparison with results from the litearture. Under the standard condition at the design point on Summer Solstice, the incident radiation of sunlight was adopted. From the simulation results, it is found that the variation of the solar radiation heat flux received on the wall of different receiver tubes is related to the annular distribution of the heliostat field. For a single absorber, the wall heat flux distribution is non-uniform, and the comparison with the Gaussian approximation distribution proves that this distribution is quite different from the design condition. Then, the heat flux distribution of the receiver at noon of Winter Solstice was obtained by using the model. Overall, it is concluded that SolTrace simulation is more practical than the simplified Gaussian approximation distribution for the treatment of wall heat flux distribution of external cylindrical absorber. |
| Key words: solar energy solar power tower plant SolTrace heat flux Gaussian approximation |
