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结合SEGS-VI槽式太阳能热电站参数,建立槽式太阳能热发电系统模型.以热力学第一、第二定律为理论基础,采用能量系统的白箱模型分析方法对槽式太阳能热发电系统——聚光集热子系统、换热子系统和动力子系统分别进行计算从而得到子系统各过程的耗散.最后用总能系统的白箱模型分析将子系统看作白箱,并以流连接形成白箱网络,对总能系统用能状况作出合理评价,找出系统用能过程中的薄弱环节,为系统节能提供依据.“,”The model of parabolic trough solar thermal power system was constructed combining the parameter of SEGS-VI parabolic trough solar thermal power plant. Taking the first law and the second law of thermodynamics as theoretical basis, the white box model analysis method of energy system was used to carry out the exergy calculation of parabolic trough solar thermal power generation system—concentrated heat collection subsystem, heat exchange subsystem and power subsystem,respectively to obtain the dissipative exergy of every process for subsystem. Finally,the white box model analysis of the total energy system was conducted by taking subsystems as white boxes and then using exergy flow to connect them into white box network,and the energy usage of total energy system was evaluated reasonably and the vulnerable spot in energy utilization process was figured out to offer a guidance for energy saving of the system.