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不可逆闭式布雷顿热电联产装置火用经济性能优化
引用本文:陶桂生,陈林根,孙丰瑞.不可逆闭式布雷顿热电联产装置火用经济性能优化[J].热能动力工程,2009,24(5).
作者姓名:陶桂生  陈林根  孙丰瑞
作者单位:海军工程大学,研究生院,湖北,武汉,430033 
基金项目:教育部新世纪优秀人才支持计划基金资助项目,全国优秀博士学位论文作者专项奖金资助项目 
摘    要:应用有限时间热力学方法,研究了恒温热源条件下不可逆闭式布雷顿联产装置的火用经济性能,导出了利润率及火用效率解析式.利用数值计算方法,以利润率为目标,对热导率分配和压比的选取进行了优化.研究了最优利润率及相应火用效率特性,并分析了各种联产设计参数对联产优化性能的影响.结果表明,对于给定的总热导率,在高温、低温和用户侧换热器之间,存在唯一的最佳热导率分配比和唯一的最佳压比,使得装置的无因次利润率取得最大值;同时存在最佳用户温度.

关 键 词:有限时间热力学  闭式布雷顿热电联产装置  (火用)  经济性能  利润率

Exergy Economic Performance Optimization of an Irreversible Closed Type Brayton Heating-and-power Cogenration Plant
Abstract:By adopting a finite time thermodynamic method,studied was the exergy economic performance of an irreversible closed type Brayton cogeneration plant under the condition of a constant temperature heat source and derived were its profit margin and exergy coefficient analytic expression.By employing a numerical calculation method,with the profit margin serving as a target,optimized were the distribution of heat conductivity and the choice of pressure ratio.The authors have studied the optimum profit margin and corresponding exergy efficiency characteristics and analyzed the influence of various design parameters of the cogeneration system on its optimized performance.The research results show that for a given total heat conductivity,there exist only one optimum heat conductivity distribution ratio and pressure ratio among heat exchangers at high temperature,low temperature and end-user side,which results in an maximal value of the non-dimensional profit margin of the plant.In the meantime,there is an optimum end-user temperature.
Keywords:finite time thermodynamics  closed type Brayton heating-and-power cogeneration plant  exergy economic performance  profit margin
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