塔式太阳能熔盐腔体吸热器一体化光热耦合模拟研究

被引:8
作者
王坤
何雅玲
邱羽
程泽东
机构
[1] 西安交通大学能源与动力工程学院,热流科学与工程教育部重点实验室
基金
国家自然科学基金重点项目;
关键词
塔式太阳能; 腔体吸热器; 光热耦合; 全镜场; 流动布置;
D O I
暂无
中图分类号
TM615 [太阳能发电];
学科分类号
0807 ;
摘要
首先采用蒙特卡罗光线追迹与杰勃哈特方法结合的混合光学模拟方法对塔式聚光集热系统中太阳辐射传播的全过程进行了完整描述,准确获得了全镜场条件下吸热表面非均匀的能流分布.在此基础上对熔盐腔体吸热器进行了一体化光热耦合模拟,重点分析了非均匀能流分布条件下熔盐流动布置方式对吸热性能的影响,同时考察了不同时刻条件下的吸热性能,结果表明:腔体吸热器吸热表面的能流分布表现出强烈的非均匀性,在这种非均匀的能流分布条件下,熔盐的流动布置方式会对吸热器性能产生显著的影响.当熔盐从能量密度高的区域流入,温度迅速升高,整个吸热面处于较高的温度水平,热损失较大,且会在熔盐出口处会出现熔盐加热吸热管的"吸热恶化"现象;当熔盐从能量密度低的区域流入,温度缓慢升高,整个吸热面处于相对较低的温度水平,热损失较小,能够获得更多的高温熔盐.另外,反射损失随时间变化显著,热损失随时间变化不显著.
引用
收藏
页码:1640 / 1649
页数:10
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