太阳能槽式聚光集热系统的热效率研究  

Study on the Thermal Efficiency of the Solar Parabolic Trough Concentration System

作　　者：周希正[1] 李明[2] 项明[2] 龙玲[1] 

机构地区：[1]宜春学院,江西宜春331200 [2]云南师范大学能源与环境学院,云南昆明652100

出　　处：《江西能源》2009年第2期14-17,20,共5页Jiangxi Energy

摘　　要：在对槽式聚光集热系统进行热力学分析的基础上,建立了槽式聚光集热系统的数学模型。通过与实验结果对比,证明了该模型的正确性。根据此模型分别计算分析了多种因素对聚光系统加热黑铜管和全玻璃真空管热效率的影响,指出了提高镜面反射率、减小热损失和提高吸收体导热系数是提高效率的有效途径。为槽式聚光系统在中高温的有效利用提供理论依据和参考。Based on thermodynamic analysis of a black copper tube heated by solar trough concentrating system, the mathematic model was established which was testified by comparison between results of the simulation and measurement. The effects of many factors to a black copper tube and a all-glass evacuated tube heated by solar trough concentrating system had been calculated and analyzed according to the mathematic model. It indicated that the improvement of mirror＇ s reflectivity, the lessening of thermal loss and the improvement of acceptant body＇ s coefficient about heat conduction is good for the improvement of thermal efficiency. The results provide an objective theoretical basis and reference to reasonably applying trough concentrating system in solar heating fields.

关 键 词：槽式聚光装置 全玻璃真空管 热效率 模型 

分 类 号：TM615[电气工程—电力系统及自动化]