基于先进[火用]分析方法的太阳能燃气联合循环[火用]损分析

ANALYSIS OF EXERGY DESTRUCTION OF INTEGRATED SOLAR COMBINED CYCLE SYSTEM BASED ON ADVANCED EXERGY ANALYSIS METHOD

以槽式太阳能集热场和燃气-蒸汽联合循环所组成的太阳能燃气联合循环为研究对象,利用先进[火用]分析方法对系统各主要部件及整体[火用]损进行分析,并将系统[火用]损分为内部损、外部[火用]损、可避免[火用]损和不可避免[火用]损。结果表明:系统[火用]效率与太阳辐射强度(DNI)具有相同的变化趋势,而系统[火用]损率则与之相反。燃烧室和太阳能集热场2个部件具有较大的[火用]损率,分别为54.8%和16.1%;系统大部分[火用]损为内部[火用]损和不可避免[火用]损。系统中[火用]损最大的部件是燃烧室,占全部[火用]损的54.86%,其次是槽式太阳能集热场,占全部[火用]损的16.15%。

The integrated solar combined cycle system consisting of parabolic trough solar collector and combined cycle power plant is taken as the research object.The main components and overall plant of the proposed system are analyzed by advanced exergy analysis method.And the exergy destruction is split into endogenous,exogenous,avoidable and unavoidable exergy destruction.Results show that the system efficiency has the same trend of change with DNI,however,the exergy destruction rate shows an opposite trend with DNI.The combustion chamber and the solar field have large values of exergy destruction rate of 54.8%and 16.1%,respectively.The endogenous and unavoidable exergy destruction contributes the most of exergy destruction in the overall plant.Additionally,the combustion chamber has the largest exergy destruction of 54.86%and the solar field has the second largest exergy destruction of 16.15%.