非均匀热流密度下太阳能吸热管的温度特性  

Temperature performance of solar thermal absorber considering non-uniform heat flux distribution

作　　者：崔文智[1,2] 李洪香[3] 

机构地区：[1]低品位能源利用技术及系统教育部重点实验室,重庆400044 [2]重庆大学动力工程学院,重庆400044 [3]中国北车集团大连机车研究所有限公司,辽宁大连116000

出　　处：《电源技术》2015年第5期1040-1042,1067,共4页Chinese Journal of Power Sources

基　　金：重庆市自然科学基金(CSTCJJA90003)

摘　　要：对矩形非均匀热流密度分布下太阳能槽式吸热管内流固耦合传热过程进行了数值模拟,得到了吸热管壁温度分布及周向和径向温度梯度。结果表明,太阳能吸热管在非均匀热流作用下其管壁温度分布不均匀,周向温度梯度在受热和非受热交界面附近有剧烈变化。吸热管热流密度的增加会导致壁面温度梯度增大,而管内换热的增强及热流密度的分布特性对温度梯度有影响。The fluid-solid coupled heat transfer process of solar trough collector on the rectangular non-uniform heat flux distribution was analyzed by using numerical simulation method. The wall temperature distribution and circumferential and radial wall temperature gradient were given. The results show that the wall temperature distribution of the solar thermal absorber in non-uniform heat flux is non-uniform, and the circumferential temperature gradient near the thermal and non-thermal interface violently changes. The increase of heat flux causes the increase of the wall temperature gradient, and the convection heat transfer strengthening and the distribution characteristics of heat flux have a certain impact on the temperature gradient.

关 键 词：太阳能集热器 非均匀热流密度 温度梯度 数值模拟 

分 类 号：TM615[电气工程—电力系统及自动化]