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中文摘要：
用有限时间热力学理论和方法研究了高炉余能余热驱动变温热源内可逆中冷回热（ICR）布雷顿热电联产（CHP）装置的炯经济性能，导出了无量纲利润率和炯效率的解析式。以利润率为目标，通过数值计算对热导率的分配、中间压比的选取进行了优化，得到了最大利润率；同时研究了最大利润率和相应的利润率特性。进一步对总压比进行优化，得到了双重最大利润率，并分析了各设计参数对联产装置最优性能的影响。最后，对工质与热源间热容率匹配进行了优化，得到了三重最大利润率。
英文摘要：
The exergoeconomic performance of an endoreversible intercooled regenerative （ICR） Brayton combined heat and power （CHP） driven by residual energy and heat of blast furnace coupled to variable temperature heat reservoirs is investigated using finite time thermodynamics. The analytical formulae about dimensionless profit rate and exergy efficiency are deduced. By taking the maximum profit rate as the objective, the heat conductance distribution, the choice of intercooling pressure ratio are optimized by detailed numerical examples and the maximum dimensionless profit rate is obtained. At the same time, the characteristic of maximum dimensionless profit rate and corresponding exergy efficiency are investigated. When the optimization is performed further with respect to the total pressure ratio of the compressor, the double-maximum profit rate is obtained, also the effects of the design parameters on the optimal performance of the cogeneration plant are analyzed. At last, the optimization is performed additionally with respect tO the thermal capacitance rate matching between the working fluid and the heat reservoir and a thricemaximum profit rate is obtained.
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