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建立了高炉余能余热驱动的变温热源不可逆中冷回热燃气轮机热电联产装置模型,以利润率为目标,用有限时间热力学理论和方法及有限时间经济分析法研究了装置的性能;导出了无量纲利润率和效率的解析式,分析了总压比给定和总压比变化两种情形,优化了中间压比和总压比;通过数值计算研究循环参数对装置性能的影响,讨论利润率和效率之间的关系,得出其特性关系为扭叶型;研究发现存在最佳的用户侧温度可以使利润率取得双重最大值。
The model of combined heat and power plant with variable temperature heat source and irreversible intercooled heat and gas turbine driven by waste heat driven by blast furnace was set up. The profitability was taken as the goal. The performance of the plant was studied by the theory and method of finite - time thermodynamics and the limited time - The analytic formulas of non-dimensional profit rate and efficiency are derived. The total pressure ratio given and the total pressure ratio change are analyzed, and the middle pressure ratio and the total pressure ratio are optimized. The influence of the cycle parameters on the performance of the device is studied by numerical calculation The relationship between profit rate and efficiency is discussed, and the relationship between the profit rate and the efficiency is discussed. The result shows that the relationship between the profit rate and the efficiency is twisting leaf type. It is found that the best user-side temperature can make the profit rate double maximum.