线性菲涅耳集热器接收器对镜场的遮挡研究
收稿日期: 2015-05-17
修回日期: 2015-07-12
网络出版日期: 2015-08-30
Discussion of Mirror Field Shelter from Linear Fresnel Collector Receiver
Received date: 2015-05-17
Revised date: 2015-07-12
Online published: 2015-08-30
带有二次反射器的线性菲涅耳聚光集热器，虽然其接收器表面的能量分布更均匀，但也增加了接收器对反射镜场的遮挡。本文采用理论计算和模拟两种方式对已设计的线性菲涅耳集热器二次反射器对镜场的遮挡情况进行分析，先通过理论计算得出二次反射器对西边三块初级反射镜遮挡角θni的范围，然后利用光线追踪软件模拟出安装和不安装二次反射器两种情况下到达初级反射镜的光线数目，根据光线数目变化情况得出西边三块反射镜的遮挡角变化范围分别为70º ~ 90º、54º ~ 72º和42º ~ 58º，同时引入光线损失率来衡量二次反射镜对镜元遮挡的影响，结果得出安装二次反射器后镜元光线损失率最大值达到23.53%。
徐 众 , 万书权 , 韩洪波 , 刘黔蜀 . 线性菲涅耳集热器接收器对镜场的遮挡研究[J]. 新能源进展, 2015 , 3(4) : 261 -264 . DOI: 10.3969/j.issn.2095-560X.2015.04.004
The linear fresnel reflector (LFR) with secondary reflector has more uniform solar radiation distribution on the receiver surface, but it increases shelter between receiver and reflector. In this article, the shielding of the designed LFR with secondary reflector was analyzed by theoretical calculation and simulation. Firstly, the range of shielding angle θni between second reflector and the west three primary mirrors was obtained by theoretical calculation. Then, the number of received rays of primary mirrors was simulated by using the ray-tracing with or without the installation of secondary reflector. According to the change of numbers, it showed that the range of shielding angle of west three mirrors were 70º ~ 90º, 54º ~ 72º and 42º ~ 58º, respectively. In addition, loss rate of rays was used to evaluate the shielding effect of secondary reflector, it showed that the maximum loss rate of rays was 23.35% with the secondary reflector.
Key words： Linear Fresnel Reflector; receiver; shielding; the shielding angle
[1] 杜春旭, 王普, 马重芳, 等. 菲涅耳太阳能聚光系统跟踪倾角的矢量算法[J]. 太阳能学报, 2011, 32(6): 31-35.
[2] 杜春旭, 王普, 吴玉庭, 等. 线性菲涅耳聚光镜场辐射量计算方[J]. 化工学报, 2010, 62(s1): 179-184.
[3] 杜春旭, 王普, 马重芳, 等. 线性菲涅耳聚光系统无遮挡镜场布置的光学几何方法[J]. 光学学报, 2010, 30(11): 3276-3282
[4] 杜春旭, 王普, 马重芳, 等. 线性菲涅耳聚光装置聚光比[J]. 光学学报, 2011, 31(8): 1-6.
[5] 浦绍选, 夏朝凤. 全平面镜线反射太阳聚光器的光学设计[J]. 农业工程学报, 2011, 12(27): 282-285.
[6] 浦绍选, 夏朝凤. 线聚光菲涅耳集热器的端部损失与补偿[J]. 农业工程学报, 2011, 27(1): 282-285.
[7] 徐众, 浦绍选, 夏朝凤. 线性菲涅耳集热器的能损分析[J]. 能源研究与利用, 2012(2): 41-43.
[8] 赵金龙, 李林, 崔正军, 等. 线性菲涅耳反射聚光器聚焦光斑能流密度分布的计算[J]. 光学学报, 2012, 32(12): 1-7.
[9] 马宏才, 金光, 钟兴, 等. 基于蒙特卡罗法的太阳能聚光接收器布局及形状优化设计[J]. 光学学报, 2013, 33(3): 1-6.
[10] Roberto G, Pietro T .Solar linear Fresnel collector using molten nitrates as heat transfer fluid [J]. Energy, 2011, 36(2):1048-1056.
[11] 徐众, 刘黔蜀, 邹敏, 等. 线性菲涅耳集热器的光学效率分析[J]. 太阳能, 2014, 28(4): 35-38.
/
| 〈 |
|
〉 |
