中冷回热布雷顿热电联产装置的性能优化  

Exergetic Performance Optimization of an Intercooled Regenerated Brayton Heat and Power Cogeneration Plant

作　　者：杨博[1] 陈林根[1] 孙丰瑞[1] 

机构地区：[1]海军工程大学船舶与动力学院,湖北武汉430033

出　　处：《工程热物理学报》2011年第6期917-921,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.10905093);教育部新世纪优秀人才支持计划项目(No.NCET-04-1006);全国优秀博士学位论文作者专项资金资助项目(No.200136)

摘　　要：建立了变温热源内可逆中冷回热布雷顿热电联产装置模型,基于分析的观点,用有限时间热力学理论和方法研究了装置的性能,导出了无量纲输出率和效率的解析式。对热导率的分配、中间压比的选取进行了优化,得到了最大输出率及相应的效率和最大效率及相应的输出率,进一步对总压比进行优化,得到了双重最大输出率和效率。分析了用户侧温度、工质与热源间的热容率匹配对最优性能的影响。An endoreversible intercooled regenerative Brayton cogeneration plant model coupled to variable-temperature heat reservoirs is established.On the basis of the exergetic analysis,the performance of the plant is investigated using finite time thermodynamics.Analytical formulae about dimensionless exergy output rate and exergy efficiency are deduced.By taking the maximum exergy output rate and exergy efficiency as the objectives,the heat conductance distributions and the choice of intercooling pressure ratios are optimized by detailed numerical examples,and corresponding exergy efficiency and exergy output rate are obtained.When the optimization is performed further with respect to the total pressure ratio of the cycle,the double-maximum exergy output rate and exergy efficiency are obtained.The effects of the consumer-side temperature and the thermal capacitance rate matching between the working fluid and the heat reservoirs on optimal performances of the cogeneration cycle are analyzed.

关 键 词：有限时间热力学 内可逆中冷回热布雷顿热电联产装置 输出率 效率 优化 

分 类 号：TK12[动力工程及工程热物理—工程热物理]