槽式太阳集热管热-结构耦合瞬态特性分析  

THERMAL-STRUCTURE COUPLING TRANSIENT PERFORMANCE ANALYSIS OF PARABOLIC TROUGH SOLAR COLLECTOR

作　　者：杨勇平[1] 吴俊杰[1] 侯宏娟[1] Yang Yongping Wu Junjie Hou Hongjuan(State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, North China Electric Power llniver.sity, Beijing 102206, China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《太阳能学报》2016年第12期3132-3136,共5页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究发展(973)计划(2015CB020515);中央高校基本科研业务费专项(2015XS87);国家高技术研究发展(863)计划(2012AA050604)

摘　　要：应用有限元数值模拟方法,对典型槽式太阳集热管建立三维模型,并对其进行热-结构耦合分析。在稳态分析的基础上,分析辐照条件变化时,太阳集热管温度、温度梯度及其热应力对时间的动态响应特性。结果表明,在太阳能辐射产生突变时,集热管在短时间内会出现超出其材料屈服极限的区域。该区域会迅速扩大并覆盖绝大部分集热管。The finite element numerical simulation method was used to set up 3D model of typical parabolic trough solar collector and carry out the corresponding thermal-structure coupling analysis. Based on the steady-state analysis, the dynamic response characteristics of temperature of collector to time, its temperature gradient to time and thermal stress to time were analyzed when solar irradiance condition varies. The results show that when solar irradianee changes abruptly, there exits areas in solar collector where the equivalent stress exceeds the material yield limitation in a short time, and the area will expand rapidly and cover the most of the collector.

关 键 词：槽式太阳集热器 热应力 热-结构耦合分析 瞬态分析 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]