抛物面槽式太阳能集热器热性能稳态与动态测试方法的比较  

Comparison between steady-state and dynamic test methods of thermal performance of parabolic trough solar collectors

作　　者：徐立[1,2] 原郭丰[1] 孙飞虎[1,2] 

机构地区：[1]中国科学院电工研究所太阳能热利用及光伏系统重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《兰州理工大学学报》2013年第4期59-63,共5页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51106150);国家科技支撑计划(2012BAA05B06);国家国际科技合作专项项目(2011DFA61920);海南省国际合作重点项目计划(2012-GH017)

摘　　要：抛物面槽式太阳能集热器热性能测试主要可以分为稳态和动态测试2种方法,依据二者所采用的物理模型,比较它们的应用范围,并且分析各自的优缺点.基于北京延庆实验平台测得的天气和集热器运行数据,运用最小二乘法进行模型的多元回归,得到稳态测试模型和动态测试模型的判定系数分别为0.58和0.96.研究表明:对于稳态测试方法,虽然物理参数少,但测试条件要求极高,只能在特定的实验装置上进行,不适合于实际运行方式下的槽式集热器;而动态测试方法充分考虑集热器的光学响应和热容特性,因此很大程度上降低了测试条件,使现场规模化槽式集热器热性能测试成为可能,是未来标准测试方法的发展趋势.Test for thermal performance of paraboloidal trough solar collectors can be chiefly divided into two kinds as steady-state test and the dynamic one. Based on the physical models employed, their applica- tion ranges were compared and their advantages and disadvantages were analyzed. By means of multiple re- gression of the data on the weather and operation of test platform at Yanqing district, Beijing with least squares method, the determination coefficients for the steady-state and dynamic models were 0. 58 and 0. 96, respectively. The investigation result showed that, although the mathematical model of the steady- state method would include less physical parameters, the requirements of test conditions would be ex- tremely strict, meaning that this method could only be used on a particular experimental setup and it would be not applicable to paraboloidal trough solar collectors operated in actual practice. As for the dy- namic method, however, the optical response and thermal capacitance of collectors were carefully consid- ered, and consequently the test requirements were dramatically lowered, making the on-site test for deter- mining thermal performance of utility-scale paraboloidal tough solar collectors possible and it would be the tendency of the future standard test method.

关 键 词：太阳能集热器 抛物面槽式 稳态测试 动态测试 热性能 

分 类 号：TK51[动力工程及工程热物理—热能工程]