大型太阳能烟囱发电站热力分析与计算  

Thermodynamic analysis and calculation of large-scale solar chimney electricity generation plant

作　　者：张楚华[1] 

机构地区：[1]西安交通大学能源与动力学院,陕西西安710049

出　　处：《可再生能源》2007年第2期3-6,共4页Renewable Energy Resources

基　　金：国家自然科学基金项目(10572113)

摘　　要：利用热力学方法建立太阳能烟囱发电系统中集热棚、烟囱及风力透平的热气流能量转换过程的理论模型及求解方法。鉴于太阳能烟囱发电站的大尺寸特征,采用一维假设建立热气流传热模型,使用龙格-库塔方法对非线性能量方程进行数值求解。对集热棚直径3 600 m,烟囱高950 m,设计功率100 MW的大型太阳能烟囱发电站进行分析与计算,给出了该电站的风力透平轴功率随质量流量和太阳辐射强度变化的规律,为风力透平机组提供热力气动设计参数,为大规模开发利用太阳能提供借鉴。By using thermodynamics method, the theoretical and numerical models are established for energy transfer of hot air through heat collector, solar chimney and wind turbine in solar chimney electricity generation system. Owing to the large geometrical scale of the system, one dimensional heat transfer model is assumed in deducing energy equations that are numerically solved by Runge-Kutta method. The thermodynamic model is validated by the thermodynamic calculation of a larger scale solar chimney electricity generation plant with heat collector diameter of 3 600 m, solar chimney height of 950 m and design shaft power of 100 MW. The relationship between shaft output power of wind turbines and mass flow rate is presented at several solar absorption intensity. The working conditions for the wind turbines are also given. This work is of reference for the large-scale exploration and utilization of solar energy.

关 键 词：太阳能烟囱 集热棚 风力透平 轴功率 

分 类 号：TM615[电气工程—电力系统及自动化]